JPH03261527A - Method and mold for forming cassette half - Google Patents
Method and mold for forming cassette halfInfo
- Publication number
- JPH03261527A JPH03261527A JP6078590A JP6078590A JPH03261527A JP H03261527 A JPH03261527 A JP H03261527A JP 6078590 A JP6078590 A JP 6078590A JP 6078590 A JP6078590 A JP 6078590A JP H03261527 A JPH03261527 A JP H03261527A
- Authority
- JP
- Japan
- Prior art keywords
- injection material
- mold
- cassette half
- molding
- pins
- 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
- 238000000034 method Methods 0.000 title claims description 9
- 239000000463 material Substances 0.000 claims abstract description 64
- 238000002347 injection Methods 0.000 claims abstract description 62
- 239000007924 injection Substances 0.000 claims abstract description 62
- 238000000465 moulding Methods 0.000 claims abstract description 36
- 239000011347 resin Substances 0.000 claims abstract description 19
- 229920005989 resin Polymers 0.000 claims abstract description 19
- 238000001816 cooling Methods 0.000 abstract description 4
- 238000004049 embossing Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 4
- 238000007872 degassing Methods 0.000 description 3
- 238000000071 blow moulding Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/1635—Making multilayered or multicoloured articles using displaceable mould parts, e.g. retractable partition between adjacent mould cavities
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
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、キャビ型とコア型との間に形成されたキャビ
ティ内に溶融樹脂を注入して、一次注入材料部と二次注
入材料部とにより構成されたカセットハーフを成形する
カセットハーフ成形方法及びカセットハーフ成形用金型
に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention involves injecting a molten resin into a cavity formed between a cavity mold and a core mold to form a primary injection material portion and a secondary injection material portion. The present invention relates to a cassette half molding method and a cassette half molding mold for molding a cassette half constituted by the above.
従来、例えば、第３図に示すようなオーディオカセット
ハーフ、すなわち、中央部に形成された帯状の透明部１
と、この透明部ｌの両側部に形成された有色部２．３と
から構成されたオーディオカセットハーフ４を二色成形
法で成形する場合には、まず、透明部１に相当する金型
内のキャビティを可動型体で閉塞した状態で、有色部２
，３に相当するキャビティ内に一次注入材料（有色樹脂
）を供給して一次成形を行い、次いで、可動型体を移動
して透明部１に相当するキャビティを形成しこのキャビ
ティ内に二次注入材料（透明樹脂）を供給して二次成形
を完了するようにしている。Conventionally, for example, an audio cassette half as shown in FIG.
When molding the audio cassette half 4, which is composed of the transparent part 1 and the colored parts 2.3 formed on both sides of the transparent part 1, by the two-color molding method, first, the inside of the mold corresponding to the transparent part 1 is With the cavity closed by the movable body, the colored part 2
The primary injection material (colored resin) is supplied into the cavity corresponding to . The material (transparent resin) is supplied to complete the secondary molding.
しかしながら、上記のようにして形成されたカセットハ
ーフ４にあっては、その有色部２の外表面の状態が良好
でない場合があり、特に、外表面にシボ加工を施した場
合には、その問題が顕著に現れる。However, in the cassette half 4 formed as described above, the condition of the outer surface of the colored portion 2 may not be good, especially when the outer surface is textured. appears prominently.
そこで、本発明者等がその原因を検討した結果、通常、
上記カセットハーフ４を成形する場合には、ゲートＧを
カセットハーフ４の前面の立縁部５に対向して一対設け
て、ここから−次注入材料をキャビティ内に注入してい
るため、有色部２には、両有色部２．３を連結している
連結部６を通って一次注入材料が供給されることになり
、従って、有色部２の樹脂の充填密度がどうしても有色
部３に比べて低くなる。この結果、二次注入材料が注入
された段階において、この二次注入材料の圧力によって
有色部２の樹脂が押圧され、ずれ動き易いということが
わかった。Therefore, as a result of the inventors' investigation into the cause, it was found that
When molding the cassette half 4, a pair of gates G are provided facing the upright edge 5 on the front surface of the cassette half 4, and the next injection material is injected into the cavity from there. 2, the primary injection material is supplied through the connecting part 6 that connects both the colored parts 2.3, and therefore, the packing density of the resin in the colored part 2 is inevitably lower than that in the colored part 3. It gets lower. As a result, it was found that at the stage where the secondary injection material was injected, the resin in the colored portion 2 was pressed by the pressure of the secondary injection material and was likely to shift.
また、成形サイクルを短縮しようとするあまり、−吹成
形と二次成形との間に十分な時間をおかない場合には、
有色部２．３の樹脂が十分にｌ９却固化しない段階で二
次注入材料が注入され、この二次注入材料の圧力によっ
て有色部の樹脂が変形し、有色部２．３の外表面の状態
に悪影響をもたらすということもわかった。Also, in an attempt to shorten the molding cycle, if sufficient time is not allowed between blow molding and secondary molding,
The secondary injection material is injected when the resin in the colored part 2.3 is not sufficiently solidified, and the pressure of this secondary injection material deforms the resin in the colored part, changing the state of the outer surface of the colored part 2.3. It was also found that it had a negative impact on
本発明は、上記知見に鑑みてなされたもので、その目的
とするところは、一次注入材料部の表面状態を良好に保
持することができ、高品質の製品を得ることができるカ
セットハーフ成形方法及びカセットハーフ成形用金型を
提供することにある。The present invention has been made in view of the above-mentioned findings, and its purpose is to provide a cassette half molding method that can maintain the surface condition of the primary injection material portion well and obtain a high-quality product. and to provide a mold for molding a cassette half.
上記目的を達成するために、本発明の請求項１は、キャ
ビ型とコア型との間に形成されたキャピテイ内に溶融樹
脂を注入して、一次注入材料部と二次注入材料部とによ
り構成されたカセットハーフを成形する成形方法におい
て、
上記一次注入材料部の、上記二次注入材料部との境界寄
りに対応するコア型に、複数の突出しピンを並設し、か
つこれらの突出しピンがキャビティ内に所定量突出され
た状態で、牛ヤビティ内に一次注入材料及び二次注入材
料を順次供給して上記カセットハーフを成形した後、上
記各突出しピンによって上記カセットハーフを離型させ
るものである。In order to achieve the above object, claim 1 of the present invention is to inject a molten resin into a cavity formed between a cavity mold and a core mold, and to form a primary injection material part and a secondary injection material part. In the molding method for molding the constructed cassette half, a plurality of ejecting pins are arranged in parallel in a core mold corresponding to a boundary between the primary injection material portion and the secondary injection material portion, and these ejection pins are arranged in parallel. After molding the cassette half by sequentially supplying the primary injection material and the secondary injection material into the cow cavity with the material protruding a predetermined amount into the cavity, the cassette half is released from the mold by each of the ejection pins. It is.
また、本発明の請求項２は、上記一次注入材料部の、二
次注入材料部との境界寄りに対応するコア型に、複数の
突出しピンが型開閉方向に移動自在に並設されたもので
ある。Further, claim 2 of the present invention is that a plurality of protruding pins are arranged in parallel in the core mold corresponding to the boundary between the primary injection material part and the secondary injection material part so as to be movable in the mold opening/closing direction. It is.
本発明のカセ・、トハーフ成形方法及びカセットハーフ
成形用金型にあっては、二次注入材料部との境界寄りに
対応するコア型に並設された複数の突出しピンを所定量
キャビティ内に突出させた状態で一次、二次成形を行う
ことにより、上記突出しピンがガス抜き効果を発揮して
、−次注入材料を円滑に流通させると共に、−次成形後
の一次注入材料の冷却固化を促進し、かつ二次成形時の
二次注入材料の圧力に対抗し、しかも型開時には、上記
各突出しピンを突出すことにより、確実にカセットハー
フを離型させる。In the cassette half molding method and the cassette half molding mold of the present invention, a plurality of protruding pins arranged in parallel on the core mold corresponding to the boundary with the secondary injection material part are inserted into the cavity by a predetermined amount. By performing the primary and secondary forming in a protruding state, the ejecting pin exhibits a degassing effect, allowing the secondary injection material to flow smoothly, and also cooling and solidifying the primary injection material after the secondary forming. The cassette half is reliably released from the mold by promoting and resisting the pressure of the secondary injection material during secondary molding, and by protruding each of the ejecting pins when the mold is opened.
以下、第１図と第２図に基づいて本発明の一実施例を説
明する。Hereinafter, one embodiment of the present invention will be described based on FIGS. 1 and 2.
第１図は本発明の一実施例のカセットハーフ成形用金型
を示すもので、このカセットハーフ成形用金型は、第２
図に示すカセットハーフ１０の外表面を形成する固定型
板１１と、この固定型板１１に対して接近離間自在に設
けられ、かつ有色部２．３の内面を形成する可動型板Ｉ
２と、この可動型板１２に移動自在に設けられ、かつ透
明部ｌの内面を形成する可動型体１３とを主体として構
成されている。FIG. 1 shows a mold for molding a cassette half according to an embodiment of the present invention.
A fixed mold plate 11 forms the outer surface of the cassette half 10 shown in the figure, and a movable mold plate I is provided so as to be able to move toward and away from the fixed mold plate 11 and forms the inner surface of the colored portion 2.3.
2, and a movable mold body 13 which is movably provided on the movable mold plate 12 and forms the inner surface of the transparent portion l.
そして、上記可動型板１２の有色部２に対応する側には
、上記可動型体１３に沿って、複数の（本実施例におい
ては外径４ｘｘの６本の）突出しピン１４が型開閉方向
に移動自在に設けられており、型締時であってキャビテ
ィ内に樹脂が充填されていない状態において、上記突出
しピン１４の先端は、上記可動型板１２の製品面からＱ
、２ｘｍ以上突出して設けられている。また、上記可動
型体１３は、図示しない駆動機構によって、−次成形時
には、固定型板１１に密接して、二次注入材料（透明樹
脂）充填空間を閉塞し、二次成形時には、固定型板１１
から離れて、二次注入材料充填空間を形成するようにな
っている。さらに、−次注入材料（有色樹脂）をキャビ
ティ内に注入するゲートＧは、第３図に示す従来例と同
様の位置、すなわち、第２図においてカセットハーフｌ
Ｏの前面の立縁部１５に対向して一対設けられている。On the side of the movable mold plate 12 corresponding to the colored part 2, a plurality of (in this embodiment, six with an outer diameter of 4xx) protruding pins 14 are provided along the movable mold body 13 in the mold opening/closing direction. When the mold is clamped and the cavity is not filled with resin, the tip of the ejecting pin 14 is located at a distance of Q from the product surface of the movable mold plate 12.
, and is provided so as to protrude by 2xm or more. Further, the movable mold body 13 is moved by a drive mechanism (not shown) into close contact with the fixed mold plate 11 during the second molding to close the space for filling the secondary injection material (transparent resin), Board 11
It is arranged to form a secondary injection material filling space. Furthermore, the gate G for injecting the -order injection material (colored resin) into the cavity is located at the same position as in the conventional example shown in FIG.
A pair are provided facing the upright edge portion 15 on the front surface of O.
上記のように構成されたカセットハーフ成形用金型を用
いてカセットハーフ１０を成形する場合には、まず、固
定型板１１に可動型板１２を密接して型締すると共に、
固定型板１１に可動型体１３を密接して、二次注入材料
充填空間を閉塞した状態で、キャビティの残りの空間内
に一次注入材料（有色樹脂）を供給して一次成形を行い
、有色部２．３を成形する。When molding the cassette half 10 using the cassette half mold configured as described above, first, the movable mold plate 12 is closely clamped to the fixed mold plate 11, and
With the movable mold body 13 closely attached to the fixed mold plate 11 and the secondary injection material filling space closed, primary injection material (colored resin) is supplied into the remaining space of the cavity to perform primary molding. Form part 2.3.
この場合、−次注入材料用のゲートＧが、カセットハー
フ１０の前面の立縁部１５に対向して設けられているか
ら、キャビティ内に注入された一次注入材料は、まず、
有色部３に充填され、次いで、一対の連結部６を通って
有色部２に供給される。In this case, since the gate G for the secondary injection material is provided opposite the upright edge 15 on the front surface of the cassette half 10, the primary injection material injected into the cavity is first
The colored part 3 is filled, and then the colored part 2 is supplied through a pair of connecting parts 6.
そして、この際、可動型板１２の製品面から所定量突出
している突出しピン１４によって、ガス抜きが円滑に行
われるから、−次注入材料が円滑に流動して樹脂の充填
が確実に行われる。At this time, degassing is performed smoothly by the protruding pin 14 protruding from the product surface of the movable mold plate 12 by a predetermined amount, so that the next injection material flows smoothly and resin filling is performed reliably. .
次いで、可動型体１３を固定型板１１から引き離し、二
次注入材料充填空間を形成した後、二次注入材料（透明
樹脂）を供給して透明部１を成形する。Next, the movable mold body 13 is separated from the fixed mold plate 11 to form a secondary injection material filling space, and then the secondary injection material (transparent resin) is supplied to mold the transparent part 1.
この場合、上記可動型板１２の製品面の、上記可動型体
１３寄りには、複数の突出しピン１４が、所定量突出し
て設けられているから、−次成形後、これらの突出しピ
ン１４によって、−次注入材料の冷却が促進され、かつ
二次成形時までに十分に固化すると共に、二次注入材料
充填時には、二次注入材料の樹脂圧力を上記各突出しピ
ン１４て受は止めることにより、有色部２が二次注入材
料によってずれ動くことがない。従って、有色部２の表
面に／本加工等を施した場合でも、有色部２の表面の状
態が良好に保持される。In this case, a plurality of ejecting pins 14 are provided on the product surface of the movable mold plate 12 near the movable mold body 13 so as to protrude by a predetermined amount. , - The cooling of the secondary injection material is promoted and it is sufficiently solidified by the time of secondary molding, and when the secondary injection material is filled, the resin pressure of the secondary injection material is stopped by each of the above-mentioned protruding pins 14. , the colored part 2 will not shift or move due to the secondary injection material. Therefore, even when the surface of the colored portion 2 is subjected to main processing or the like, the condition of the surface of the colored portion 2 is maintained well.
続いて、二次成形後、固定型板１１が可動型板１２を引
き離すと、可動型板１２側に製品が付着してくるから、
突出しピン１４を可動型板１２の製品面から突出すこと
により、製品が円滑に離型される。このようにして得ら
れたカセットハーフ１０には、第２図に示すように、有
色部２の内面の、透明部ｌ寄りに沿って、６個の突出し
ピン跡（小孔）＋６が形成されている。Subsequently, after secondary molding, when the fixed mold plate 11 separates the movable mold plate 12, the product will adhere to the movable mold plate 12 side.
By protruding the ejecting pins 14 from the product surface of the movable mold plate 12, the product can be smoothly released from the mold. In the cassette half 10 obtained in this way, six ejecting pin marks (small holes) +6 are formed on the inner surface of the colored part 2 near the transparent part l, as shown in FIG. ing.
なお、上記実施例においては、有色部２側にのみ突出し
ピン１４を設けた構成で説明したが、有色部３側に突出
しピン１４を設けてもよい。また、型開時に、突出しピ
ン１４を突出してカセットハーフ１０を突出す際に、吸
着機構によってカセットハーフ１０の外表面を吸着して
円滑にカセットハーフ１０を取り出してもよい。In the above embodiment, the protrusion pin 14 is provided only on the colored portion 2 side, but the ejection pin 14 may be provided on the colored portion 3 side. Further, when the mold is opened, when the ejecting pin 14 is protruded to eject the cassette half 10, the outer surface of the cassette half 10 may be adsorbed by a suction mechanism to smoothly take out the cassette half 10.
以上説明したように、本発明のカセットハーフ成形方法
及びカセットハーフ成形用金型によれば、二次注入材料
部との境界寄りに対応するコア型に並設された複数の突
出しピンを所定量キャビティ内に突出させた状態で一次
、二次成形を行うことにより、上記突出しピンがガス抜
き効果を発揮して、−次注入材Ｅ［を円滑に流通させる
ことができると共に、−次成形後の一次注入材料の冷却
固化を促進し、かつ二次成形時の二次注入材料の圧力に
対抗し、しかし型間時には、上記各突出しピンを突出す
ことにより、確実にカセットハーフを離型させることが
でき、かつ二次成形時に一次注入材料部が二次注入材料
の樹脂圧でずれ動くことがなく、かつ一次注入材料部の
表面状態を良好に保持することができる上に、高品質の
製品を得ることができる。As explained above, according to the cassette half molding method and the cassette half molding mold of the present invention, a plurality of protruding pins arranged in parallel on the core mold corresponding to the boundary with the secondary injection material part are inserted in a predetermined amount. By performing the primary and secondary molding while protruding into the cavity, the ejecting pin exerts a degassing effect, allowing the next injection material E to flow smoothly, and also after the second molding. To promote the cooling and solidification of the primary injection material and to resist the pressure of the secondary injection material during secondary molding, but to ensure that the cassette half is released from the mold by protruding each of the ejection pins during mold separation. In addition, during secondary molding, the primary injection material part does not shift due to the resin pressure of the secondary injection material, and the surface condition of the primary injection material part can be maintained well. You can get the product.
第１図と第２図は本発明の一実施例を示すもので、第１
図は断面図、第２図は成形されたカセットハーフの一例
を裏側からみた下面図、第３図は従来のカセットハーフ
の斜視図である。
１・・透明部（二次注入材料部）、２．３・・有色部（
一次注入材料部）、１０・カセ、トノ＼−フ、１１・・
・固定型板、１２・・可動型板、１３・・・可動型体、
１４・・突出しビン。Figures 1 and 2 show one embodiment of the present invention.
The figure is a sectional view, FIG. 2 is a bottom view of an example of a molded cassette half seen from the back side, and FIG. 3 is a perspective view of a conventional cassette half. 1...Transparent part (secondary injection material part), 2.3...Colored part (
Primary injection material section), 10, case, tonneau, 11...
・Fixed mold plate, 12... Movable mold plate, 13... Movable mold body,
14...Protruding bottle.
Claims (1)
に溶融樹脂を注入して、一次注入材料部と二次注入材料
部とにより構成されたカセットハーフを成形する成形方
法において、 上記一次注入材料部の、上記二次注入材料部との境界寄
りに対応するコア型に、複数の突出しピンを並設し、か
つこれらの突出しピンがキャビティ内に所定量突出され
た状態で、キャビティ内に一次注入材料及び二次注入材
料を順次供給して上記カセットハーフを成形した後、上
記各突出しピンによって上記カセットハーフを離型させ
ることを特徴とするカセットハーフ成形方法。 ２）キャビ型とコア型との間に形成されたキャビティ内
に溶融樹脂を注入して、一次注入材料部と二次注入材料
部とにより構成されたカセットハーフを成形する成形用
金型において、 上記一次注入材料部の、上記二次注入材料部との境界寄
りに対応するコア型に、複数の突出しピンが型開閉方向
に移動自在に並設されたことを特徴とするカセットハー
フ成形用金型。[Claims] 1) Molten resin is injected into a cavity formed between a cavity mold and a core mold to mold a cassette half constituted by a primary injection material part and a secondary injection material part. In the molding method, a plurality of ejecting pins are arranged in parallel in a core mold corresponding to a boundary between the primary injection material portion and the secondary injection material portion, and these ejection pins protrude into the cavity by a predetermined amount. A method for molding a cassette half, characterized in that the cassette half is molded by sequentially supplying a primary injection material and a secondary injection material into a cavity in a state in which the cassette half is molded, and then the cassette half is released from the mold by each of the ejecting pins. 2) In a molding die for injecting molten resin into a cavity formed between a cavity mold and a core mold to mold a cassette half constituted by a primary injection material part and a secondary injection material part, A cassette half molding die characterized in that a plurality of ejecting pins are arranged in parallel in a core mold corresponding to a boundary between the primary injection material part and the secondary injection material part so as to be movable in the mold opening/closing direction. Type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6078590A JP2712728B2 (en) | 1990-03-12 | 1990-03-12 | Cassette half molding method and cassette half molding die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6078590A JP2712728B2 (en) | 1990-03-12 | 1990-03-12 | Cassette half molding method and cassette half molding die |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03261527A true JPH03261527A (en) | 1991-11-21 |
| JP2712728B2 JP2712728B2 (en) | 1998-02-16 |
Family
ID=13152296
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6078590A Expired - Fee Related JP2712728B2 (en) | 1990-03-12 | 1990-03-12 | Cassette half molding method and cassette half molding die |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2712728B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3427914A1 (en) * | 2017-07-13 | 2019-01-16 | Essity Hygiene and Health Aktiebolag | Outer shell for a dispenser and method for producing such an outer shell |
| CN117301440A (en) * | 2023-12-01 | 2023-12-29 | 成都瀚德胜邦光学有限公司 | Pneumatic demoulding deep cavity injection molding die and demoulding method |
-
1990
- 1990-03-12 JP JP6078590A patent/JP2712728B2/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3427914A1 (en) * | 2017-07-13 | 2019-01-16 | Essity Hygiene and Health Aktiebolag | Outer shell for a dispenser and method for producing such an outer shell |
| WO2019011649A1 (en) * | 2017-07-13 | 2019-01-17 | Sca Hygiene Products Ab | Outer shell for a dispenser and method for producing such an outer shell |
| CN110891757A (en) * | 2017-07-13 | 2020-03-17 | 易希提卫生与保健公司 | Housing for a dispenser and method for manufacturing such a housing |
| RU2737091C1 (en) * | 2017-07-13 | 2020-11-24 | Эссити Хайджин Энд Хелт Актиеболаг | External housing for dispenser and method for production of such external housing |
| US11878450B2 (en) | 2017-07-13 | 2024-01-23 | Essity Hygiene And Health Aktiebolag | Outer shell for a dispenser |
| CN117301440A (en) * | 2023-12-01 | 2023-12-29 | 成都瀚德胜邦光学有限公司 | Pneumatic demoulding deep cavity injection molding die and demoulding method |
| CN117301440B (en) * | 2023-12-01 | 2024-02-06 | 成都瀚德胜邦光学有限公司 | Pneumatic demoulding deep cavity injection molding die and demoulding method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2712728B2 (en) | 1998-02-16 |
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