JPS6353007A - Structure preventing mold from deflection - Google Patents

Structure preventing mold from deflection

Info

Publication number
JPS6353007A
JPS6353007A JP19779586A JP19779586A JPS6353007A JP S6353007 A JPS6353007 A JP S6353007A JP 19779586 A JP19779586 A JP 19779586A JP 19779586 A JP19779586 A JP 19779586A JP S6353007 A JPS6353007 A JP S6353007A
Authority
JP
Japan
Prior art keywords
mold
back plate
deflection
spacer block
plate
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
Application number
JP19779586A
Other languages
Japanese (ja)
Inventor
Yasuo Odagiri
小田切 泰雄
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Seiko Epson Corp
Original Assignee
Seiko Epson Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Seiko Epson Corp filed Critical Seiko Epson Corp
Priority to JP19779586A priority Critical patent/JPS6353007A/en
Publication of JPS6353007A publication Critical patent/JPS6353007A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To enable to prevent the occurrence of deflection of a mold due to the inner pressure of a cavity, by pouring a hydraulic fluid between a back plate, a spacer block and a movable die plate. CONSTITUTION:A hydraulic fluid 4 fills the space between a back plate 1, a spacer block 2 and a movable die plate 3. If a load is applied on a back plate 1 due to an inner pressure 9 of a cavity 9, a mold pinching a molding 10 is not deflected due to the presence of the hydraulic fluid 4. When the mold is opened or injection is carried out, the injector device 11 can be smoothly worked by acting a piston 6.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、プラスチック射出成形用金型のたわみ防止構
造に関する。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a deflection prevention structure for a plastic injection mold.

〔従来の技術〕[Conventional technology]

従来、プラスチック射出成形用金型において、キャビテ
ィ内圧による金型のたわみの発生を防止するために、成
形品の投影面積、推定成形条件から判断して、可動側バ
ックプレート、スペーサーブロック間の最大許容たわみ
社を決定し、計算によりバックプレート厚み、スペーサ
ースパン、サポートピンの設定等を決定すると−う、金
型強度により金型のたわみを防止していた。
Conventionally, in plastic injection molds, in order to prevent mold deflection due to cavity internal pressure, the maximum allowable distance between the movable back plate and spacer block was determined from the projected area of the molded product and estimated molding conditions. After selecting Tawaramisha and calculating the back plate thickness, spacer span, support pin settings, etc., the strength of the mold prevented the mold from warping.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

しかしながら、推定成形条件により金型強度を決定する
ため、推定成形条件以外の条件で成形を行なわなければ
ならない場合、金型にたわみが発生し、成形品が不良と
なってしまう可能性があり問題があった。
However, since the mold strength is determined by the estimated molding conditions, if molding must be performed under conditions other than the estimated molding conditions, the mold may warp and the molded product may be defective, which is a problem. was there.

本発明の目的は、このような従来技術の欠陥をなくして
、金型のたわみの発生を防止する構造を提供するもので
ある。
An object of the present invention is to eliminate such deficiencies of the prior art and provide a structure that prevents the occurrence of deflection of the mold.

〔問題点を解決するだめの手段〕[Failure to solve the problem]

不発明によるプラスチック射出成形用金型のたわみ防止
構造は、バックプレート、スペーサープコツクロ可動取
付板の間に作動油を入れることにより、キャピテイ内圧
による金型のたわみの発生を防止する構造な特徴とする
The uninvented deflection prevention structure for plastic injection molds has a structural feature that prevents the mold from deflecting due to internal pressure by putting hydraulic oil between the back plate and the spacer pouch movable mounting plate. .

〔実施例〕〔Example〕

本発明の実施例を2プレートタイプの金型の例を用いて
図面にもとづいて説明する。
Embodiments of the present invention will be explained based on the drawings using an example of a two-plate type mold.

第1図は、作動油による几わみ防止構造を持った2プレ
ートタイプのプラスチック射出成形用金型である。また
、第2図はスペーサーブロック平面図である。
Figure 1 shows a two-plate type plastic injection mold that has a structure that prevents shrinkage caused by hydraulic oil. Further, FIG. 2 is a plan view of the spacer block.

第1図において、バックプレート1.スペーサーブロッ
ク2.可動取付板5.の間には、作動油4が充填されて
いる。第1図(α)において、キャビティー内圧9によ
り、バックプレート1に荷重が加わっても作動油4によ
り成形品10を挾む金型は念わむ事がない、第1図(b
)において、型開き、イジェクタ−時においては、ピス
トン6が作動する事により、イジェクタ−装置11は無
理なく作動出来る。
In FIG. 1, back plate 1. Spacer block 2. Movable mounting plate 5. Hydraulic oil 4 is filled between them. In Fig. 1 (a), even if a load is applied to the back plate 1 due to the cavity internal pressure 9, the mold does not pinch the molded product 10 due to the hydraulic oil 4;
), when the mold is opened and the ejector is activated, the piston 6 operates, so that the ejector device 11 can operate without difficulty.

特にイジェクタ−時には作動油4が密閉状態にあるとイ
ジェクタ−プレート5の移動抵抗が大きいが、ピストン
6の位置で作動油が押し出されることにより圧力を減じ
てイジェクタ−プレート5の動きをよりスムースにする
ものである。第2図は第1図に用いたスペーサブロック
2を示しており、(α)は側面図で、(b)は正面図で
ある。
Particularly during ejector operation, if the hydraulic oil 4 is in a sealed state, the movement resistance of the ejector plate 5 is large, but by pushing out the hydraulic oil at the position of the piston 6, the pressure is reduced and the movement of the ejector plate 5 is made smoother. It is something to do. FIG. 2 shows the spacer block 2 used in FIG. 1, where (α) is a side view and (b) is a front view.

またピストン6が油圧により押し上げられるタイミング
として、リターンビン、イジェクタ−ビン8とタイミン
グが微妙にズレることになり、成形品の除去を容易にし
ている。
Further, the timing at which the piston 6 is pushed up by the hydraulic pressure is slightly different from that of the return bin and the ejector bin 8, making it easier to remove the molded product.

〔発明の効果〕〔Effect of the invention〕

以上のように、本発明によれば、プラスチック射at 
成を用金型において、バックプレート、スペーサーブロ
ック、可動取付板の間に作動油を入れることにより、キ
ャビティ内圧による金型のたわみの発生を防止出来る。
As described above, according to the present invention, plastic injection at
By putting hydraulic oil between the back plate, spacer block, and movable mounting plate in a mold for molding, it is possible to prevent the mold from bending due to the internal pressure of the cavity.

【図面の簡単な説明】[Brief explanation of drawings]

第1図(α)、(b)は、本発明の実凡例における金型
断面図、第2図(α)、(A)は第1図におけるスペー
サーブロックの平面図と側面図である。 1・・・・・・・・・バックプレート 2・・・・・・・・・スペーサーブロック3・・・・・
・・・・可動取付板 4・・・・・・・・・作動油 5・・・・・・・・・イジェクタ−プレート6・・・・
・・・・・ピストン 7・・・・・・・・・リターンピン 8・・・・・・・・・イジェクタ−ビン9・・・・・・
・・・キャビティー内圧10・・・・・・成形品 11・・・・・・イジェクタ−装置 板  上 出願人 セイコーエプソン株式会社 代理人 弁理士 最占′務゛9;他1名)(p) 第1図 CcL)(b) 第2図
FIGS. 1(α) and (b) are sectional views of a mold according to an example of the present invention, and FIGS. 2(α) and (A) are a plan view and a side view of the spacer block in FIG. 1. 1... Back plate 2... Spacer block 3...
......Movable mounting plate 4...Hydraulic oil 5...Ejector plate 6...
... Piston 7 ... Return pin 8 ... Ejector bin 9 ...
... Cavity internal pressure 10 ... Molded product 11 ... Ejector device plate Upper applicant Seiko Epson Co., Ltd. agent Patent attorney Saitou's office ゛9; and 1 other person) (p ) Figure 1 CcL) (b) Figure 2

Claims (1)

【特許請求の範囲】[Claims] (1)プラスチック射出成形用金型において、バックプ
レート、スペーサーブロック、可動取付板の間に作動油
を入れることにより、キャビティ内圧による金型のたわ
みの発生を防止する構造を特徴とする、金型のたわみ防
止構造。
(1) In a plastic injection mold, the mold is characterized by a structure that prevents the mold from warping due to cavity internal pressure by putting hydraulic oil between the back plate, spacer block, and movable mounting plate. Prevention structure.
JP19779586A 1986-08-22 1986-08-22 Structure preventing mold from deflection Pending JPS6353007A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19779586A JPS6353007A (en) 1986-08-22 1986-08-22 Structure preventing mold from deflection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19779586A JPS6353007A (en) 1986-08-22 1986-08-22 Structure preventing mold from deflection

Publications (1)

Publication Number Publication Date
JPS6353007A true JPS6353007A (en) 1988-03-07

Family

ID=16380477

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19779586A Pending JPS6353007A (en) 1986-08-22 1986-08-22 Structure preventing mold from deflection

Country Status (1)

Country Link
JP (1) JPS6353007A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5384939A (en) * 1992-02-14 1995-01-31 Fischerwerke Artur Fischer Gmbh & Co. Kg Fixing element for holding a mat

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5384939A (en) * 1992-02-14 1995-01-31 Fischerwerke Artur Fischer Gmbh & Co. Kg Fixing element for holding a mat

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