JP3195304B2 - Mold clamping device of molding machine - Google Patents
Mold clamping device of molding machineInfo
- Publication number
- JP3195304B2 JP3195304B2 JP4295499A JP4295499A JP3195304B2 JP 3195304 B2 JP3195304 B2 JP 3195304B2 JP 4295499 A JP4295499 A JP 4295499A JP 4295499 A JP4295499 A JP 4295499A JP 3195304 B2 JP3195304 B2 JP 3195304B2
- Authority
- JP
- Japan
- Prior art keywords
- fixed
- mold clamping
- machine
- board
- clamping device
- 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.)
- Expired - Lifetime
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
- B29C45/1761—Means for guiding movable mould supports or injection units on the machine base or frame; Machine bases or frames
Description
【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【０００１】[0001]
【発明の属する技術分野】この発明は、合成樹脂の成
形、特に情報記録用のディスクなどの成形精度が要求さ
れる成形品の射出成形に適した成形機の型締装置に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold clamping device of a molding machine suitable for molding a synthetic resin, particularly for injection molding of a molded article such as a disc for information recording which requires molding precision.
【０００２】[0002]
【発明が解決しようとする課題】通常、成形機の型締装
置は、図１に示すように、機台１の上に立設した固定盤
２と、その固定盤２の四隅部に止着した４本のタイバー
３，３に挿通して、固定盤２に対し進退自在に設けた機
台上の可動盤４と、その可動盤４に連結して機台上に設
置した型締機構５とから構成され、その型締機構５によ
り固定盤２と可動盤４の対向面に分割して取付けた金型
６を型締している。Generally, as shown in FIG. 1, a mold clamping device of a molding machine has a fixed plate 2 erected on a machine base 1 and fixed to four corners of the fixed plate 2. A movable platen 4 on the machine base which is inserted into the four tie bars 3 and 3 so as to be able to advance and retreat with respect to the fixed platen 2, and a mold clamping mechanism 5 which is connected to the movable platen 4 and installed on the machine stand. The mold 6 is clamped by the mold clamping mechanism 5 which is separately mounted on the opposing surfaces of the fixed platen 2 and the movable platen 4.
【０００３】型締後において金型６には、射出装置（図
示せず）から溶融樹脂の射出充填がされ、製品の成形が
行われる。この溶融樹脂の射出充填に際して金型６は冷
却されているが、金型６からの伝熱により固定盤２は熱
膨張するようになる。また金型温度は材料樹脂によって
高く維持することもあり、それにともない固定盤２の熱
膨張も大きくなって型締に影響を与えることがある。After the mold is clamped, the mold 6 is injected and filled with a molten resin from an injection device (not shown) to mold a product. The mold 6 is cooled during the injection filling of the molten resin, but the fixed platen 2 thermally expands due to the heat transfer from the mold 6. Also, the mold temperature may be kept high by the material resin, and accordingly, the thermal expansion of the fixed platen 2 may increase, which may affect mold clamping.
【０００４】これまでの機台１に対する固定盤２の固定
は、図３に示すように、固定盤２の下部両端に一体形成
した脚部７，７を、ボルト８，８などにより機台１の上
面に締着するものであった。このため固定盤２は両端方
向に対して拘束された状態にあり、この拘束により熱膨
張による両端方向への均等な伸びが阻害されて、固定盤
２の面内に歪みが生ずるようになる。As shown in FIG. 3, the fixing plate 2 is fixed to the machine base 1 by fixing the legs 7, 7 integrally formed on both lower ends of the fixing plate 2 with bolts 8, 8 and the like. Was fastened to the upper surface of the. For this reason, the fixed platen 2 is in a state of being constrained with respect to both end directions, and this restriction hinders uniform elongation in both end directions due to thermal expansion and causes distortion in the plane of the fixed platen 2.
【０００５】また固定盤２が型締力を受けると、ボルト
８，８により機台１に締着された脚部７，７に近い隅部
と脚部７，７から離れた隅部の型締力による固定盤２の
撓みが、中心に対して均等ではなくなり、四隅部の４本
のタイバー３，３の伸びも不均一となる。また金型６に
かかる型締力も不均一となって、型締精度が損なわれる
ようになり、成形精度の高い製品の射出成形が困難とな
る。When the fixed platen 2 is subjected to a mold clamping force, the corners near the legs 7, 7 and the corners separated from the legs 7, 7 fastened to the machine base 1 by the bolts 8, 8 are formed. The deflection of the fixed platen 2 due to the tightening force is not uniform with respect to the center, and the expansion of the four tie bars 3 at the four corners is also uneven. In addition, the mold clamping force applied to the mold 6 becomes uneven, and the mold clamping accuracy is impaired, making it difficult to perform injection molding of a product having high molding accuracy.
【０００６】また締着力を弱めて両端方向へ伸び易くす
ることも可能であるが、熱膨張による伸びは中心よりも
両端部において大きく生じ、これにより両端部の脚部下
面と機台上面との間に滑りが生じて、摩耗や汚れなどが
生ずるようになり、それらが原因で長期間の使用では固
定盤２や機台上面が歪むことすらある。Although it is possible to weaken the tightening force and make it easier to expand in both end directions, the expansion due to thermal expansion occurs more at both ends than at the center, whereby the lower surface of the legs at both ends and the upper surface of the machine stand are formed. Slippage occurs between them, causing wear and dirt to occur, which may cause distortion of the fixed platen 2 and the upper surface of the machine base even in long-term use.
【０００７】この発明は、上記熱膨張による固定盤の課
題を解決するために考えられたものであって、その目的
は、機台に対する固定盤の止着位置を、固定盤として最
も熱膨張による伸びの影響を受け難い中央部とし、これ
により熱膨張及び型締力による歪みなどを防止して、型
締精度の向上を図ることができる新たな成形機の型締装
置を提供することにある。The present invention has been conceived to solve the above-mentioned problem of the fixed plate due to thermal expansion. An object of the present invention is to set the fixing position of the fixed plate to the machine base by using the most thermal expansion due to the fixed plate. An object of the present invention is to provide a mold clamping device for a new molding machine which has a central portion that is not easily affected by elongation, thereby preventing distortion due to thermal expansion and mold clamping force, and can improve mold clamping accuracy. .
【０００８】[0008]
【課題を解決するための手段】上記目的によるこの発明
は、機台上に立設した固定盤と、その固定盤の隅部に止
着した複数本のタイバーに挿通して、該固定盤に対し進
退自在に設けた機台上の可動盤と、その可動盤に連結し
て機台上に設置した型締機構とからなる型締装置におい
て、上記固定盤の下側面中央にタイバー間隔内に収まる
横長の脚部を突設し、その脚部を機台に止着して固定盤
の両端部を熱膨張に対し自由状態に構成してなるという
ものであり、また上記機台の上面と上記固定盤の中心位
置をピン孔とピンとの嵌合により一致させて、該固定盤
を機台中央に立設してなる、というものでもある。SUMMARY OF THE INVENTION The present invention according to the above object is achieved by inserting a fixed plate erected on a machine base and a plurality of tie bars fixed to the corners of the fixed plate into the fixed plate. On the other hand, in a mold clamping device composed of a movable plate on a machine base provided to be able to move forward and backward, and a mold clamping mechanism connected to the movable plate and installed on the machine stand, the center of the lower surface of the fixed plate is set within a tie bar interval. Protruding horizontally long legs that fit are attached, the legs are fixed to the machine base, and both ends of the fixed plate are configured to be free from thermal expansion, and the upper surface of the machine The center position of the fixed plate is matched by fitting the pin hole and the pin, and the fixed plate is erected in the center of the machine base.
【０００９】[0009]
【発明の実施の形態】図１は、この発明の１実施形態を
示すもので、機台１の上面に立設した固定盤２の下側面
中央には、タイバー３，３の間隔内に収まる横長の脚部
１０が突設しある。この脚部１０は固定盤２と並行な止
着用の縁辺１１，１１を前後に一体成形したものからな
る。FIG. 1 shows an embodiment of the present invention, in which the center of the lower surface of a fixed platen 2 erected on the upper surface of a machine base 1 fits within a space between tie bars 3,3. A horizontally long leg 10 protrudes. The legs 10 are formed by integrally molding front and rear edges 11, 11 for fastening parallel to the fixing plate 2.
【００１０】上記機台１の上面中央部には、横幅が脚部
長さと略同一の座板１２が敷設してあり、その座板１２
の上に脚部１０を置き載せて固定盤２を機台上面に立設
している。At the center of the upper surface of the machine base 1, a seat plate 12 having a width substantially equal to the length of the leg is laid.
The fixed part 2 is erected on the upper surface of the machine base with the leg part 10 placed on it.
【００１１】この固定盤２の立設は、固定盤２の中心直
下の脚部下面と座板中心とにピン孔を穿設し、そのピン
孔に位置決め用のピン１３を嵌合して、機台１の上面と
固定盤２の中心位置を一致させたのち、脚部１０の前後
縁辺１１，１１を固定盤２と並行にボルト１４，１４に
より座板１２に止着して行っている。The fixed platen 2 is erected by forming a pin hole in the lower surface of the leg just below the center of the fixed plate 2 and the center of the seat plate, and fitting a positioning pin 13 into the pin hole. After the upper surface of the machine base 1 and the center position of the fixed board 2 are made to coincide with each other, the front and rear edges 11, 11 of the leg 10 are fixed to the seat plate 12 by bolts 14, 14 in parallel with the fixed board 2. .
【００１２】このように中央部を止着して機台１の上面
に立設した固定盤２では、機台１による拘束は中央部の
みとなり、両端部は自由状態にあることから、金型６か
らの伝熱による加熱により熱膨張しても、その熱膨張は
固定盤中心から左右及び上下方向へ均等に生ずるように
なる。また熱膨張による伸びは固定盤２の両端部にて顕
著に現れて滑りを起こすが、固定盤２の中央部では熱膨
張は極めて僅かで滑りが生ずるほどのものではない。In the stationary platen 2 having the central portion fixed thereto and erected on the upper surface of the machine base 1, the machine base 1 restricts only the central portion and both ends are in a free state. Even if the thermal expansion occurs due to the heat from the heat transfer from 6, the thermal expansion occurs evenly in the horizontal and vertical directions from the center of the fixed platen. Further, the elongation due to thermal expansion appears remarkably at both ends of the fixed platen 2 and causes slippage, but the thermal expansion is very slight at the center portion of the fixed platen 2 and is not so large as to cause slippage.
【００１３】例えば、記録情報用のディスク成形では、
金型温度を１３５℃に高めて行う場合があり、固定盤２
の温度は金型６からの伝熱により１００℃ほどになる。
また機台１の温度は３０℃程度で、固定盤２との温度差
は７０℃ほどとなる。その温度差から生ずる熱膨張は、
熱膨張率を１１．２×１０-6とすると、０．３９mmとな
り、その分だけ固定盤２は両端方向に均等に伸びるよう
になる。For example, in forming a disk for recording information,
In some cases, the mold temperature may be increased to 135 ° C.
Is about 100 ° C. due to heat transfer from the mold 6.
The temperature of the machine base 1 is about 30 ° C., and the temperature difference from the fixed board 2 is about 70 ° C. The thermal expansion resulting from the temperature difference is
If the coefficient of thermal expansion is 11.2 × 10 −6, it will be 0.39 mm, and the fixed platen 2 will evenly extend in both end directions.
【００１４】この結果、熱膨張による固定盤２や機台１
の歪みが防止され、また止着部分の滑りも生じないの
で、長期の使用においても摩耗や汚れなどによる不都合
も起こらず、型締力も熱膨張に影響されず常に固定盤中
心に対して対称に働くようになるので、タイバー３，３
も均一に伸長して金型２を型締することになる。As a result, the fixed platen 2 and the machine base 1 due to thermal expansion
This prevents distortion of the fixing part and prevents slippage of the fastening part.Therefore, there is no inconvenience due to wear and dirt even during long-term use, and the mold clamping force is not affected by thermal expansion and is always symmetrical with respect to the center of the fixed platen. I will work, so tie bars 3,3
The mold 2 is also stretched uniformly to clamp the mold 2.
【００１５】したがって、この発明によれば、固定盤の
下部両端に一体形成した脚部を、機台上面に締着した場
合における不均一な熱膨張による固定盤の歪みや熱膨張
による滑りなどが解決され、また型締力による固定盤の
撓みを中心に対して対称に維持でき、複数本のタイバー
伸びも常に均等に生ずるので、長期の使用においても型
締精度が損なわれず、金型の高温維持が要求される記録
情報用のディスク成形にも採用して、成形精度の高い製
品を射出成形することが可能となる。Therefore, according to the present invention, distortion of the fixed plate due to non-uniform thermal expansion and slippage due to thermal expansion when the legs integrally formed at both lower ends of the fixed plate are fastened to the upper surface of the machine base are prevented. In addition, the deflection of the fixed plate due to the mold clamping force can be maintained symmetrically with respect to the center, and the elongation of a plurality of tie-bars always occurs evenly. It can also be used for disk molding for recorded information that needs to be maintained, so that products with high molding accuracy can be injection molded.
【図１】 この発明を採用した成形機の型締装置の立面
図である。FIG. 1 is an elevational view of a mold clamping device of a molding machine employing the present invention.
【図２】 同上の固定盤側の側面図である。FIG. 2 is a side view of the same fixed board side.
【図３】 従来の型締装置の固定盤側の側面図である。FIG. 3 is a side view of a conventional mold clamping device on a fixed platen side.
【符号の説明】 １ 機台 ２ 固定盤 ３ タイバー ４ 可動盤 ５ 型締機構 ６ 金型 １０ 脚部 １１ 縁辺 １２ 座板 １３ 位置決め用のピン １４ ボルト[Description of Signs] 1 Machine stand 2 Fixed board 3 Tie bar 4 Movable board 5 Mold clamping mechanism 6 Mold 10 Leg 11 Edge 12 Seat plate 13 Pin for positioning 14 Bolt
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平９−300415（ＪＰ，Ａ) 特開 平９−277331（ＪＰ，Ａ) 特開 平７−112469（ＪＰ，Ａ) 特開 平３−26515（ＪＰ，Ａ) 特開 平２−75499（ＪＰ，Ａ) 特開 平８−336870（ＪＰ，Ａ) 特開 平11−240055（ＪＰ，Ａ) 実開 平７−35020（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) B29C 45/64 - 45/68 B29C 33/00 - 33/76 ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-9-300415 (JP, A) JP-A-9-277331 (JP, A) JP-A-7-112469 (JP, A) JP-A-3-300 26515 (JP, A) JP-A-2-75499 (JP, A) JP-A-8-336870 (JP, A) JP-A-11-240055 (JP, A) JP-A-7-35020 (JP, U) (58) Field surveyed (Int.Cl. 7 , DB name) B29C 45/64-45/68 B29C 33/00-33/76
Claims (2)
の隅部に止着した複数本のタイバーに挿通して、該固定
盤に対し進退自在に設けた機台上の可動盤と、その可動
盤に連結して機台上に設置した型締機構とからなる型締
装置において、 上記固定盤の下側面中央にタイバー間隔内に収まる横長
の脚部を突設し、その脚部を機台に止着して固定盤の両
端部を熱膨張に対し自由状態に構成してなることを特徴
とする成形機の型締装置。1. A movable plate mounted on a machine stand provided on a machine stand and inserted through a plurality of tie bars fixed to the corners of the machine plate so as to advance and retreat with respect to the fixed plate. In a mold clamping device consisting of a board and a mold clamping mechanism connected to the movable board and installed on a machine base, a horizontally long leg that fits within the tie bar interval protrudes from the center of the lower surface of the fixed board, A mold clamping device for a molding machine, wherein legs are fixed to a machine base and both ends of a fixed plate are configured to be free from thermal expansion.
をピン孔とピンとの嵌合により一致させて、該固定盤を
機台中央に立設してなることを特徴とする請求項１記載
の成形機の型締装置。2. The machine according to claim 1, wherein an upper surface of the machine base and a center position of the fixed board are matched by fitting a pin hole and a pin, and the fixed board is erected at the center of the machine board. 2. The mold clamping device of the molding machine according to 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4295499A JP3195304B2 (en) | 1999-02-22 | 1999-02-22 | Mold clamping device of molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4295499A JP3195304B2 (en) | 1999-02-22 | 1999-02-22 | Mold clamping device of molding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000238100A JP2000238100A (en) | 2000-09-05 |
| JP3195304B2 true JP3195304B2 (en) | 2001-08-06 |
Family
ID=12650427
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4295499A Expired - Lifetime JP3195304B2 (en) | 1999-02-22 | 1999-02-22 | Mold clamping device of molding machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3195304B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4021459B2 (en) | 2006-03-24 | 2007-12-12 | ファナック株式会社 | Molding mechanism of injection molding machine |
| JP5911978B1 (en) | 2015-01-08 | 2016-04-27 | ファナック株式会社 | Fixed platen of injection molding machine |
-
1999
- 1999-02-22 JP JP4295499A patent/JP3195304B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP2000238100A (en) | 2000-09-05 |
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