JPH01171908A - Metal mold - Google Patents

Metal mold

Info

Publication number
JPH01171908A
JPH01171908A JP33212587A JP33212587A JPH01171908A JP H01171908 A JPH01171908 A JP H01171908A JP 33212587 A JP33212587 A JP 33212587A JP 33212587 A JP33212587 A JP 33212587A JP H01171908 A JPH01171908 A JP H01171908A
Authority
JP
Japan
Prior art keywords
core
gas
mold
cavity
holder
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
JP33212587A
Other languages
Japanese (ja)
Inventor
Junya Kawamura
川村 純也
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.)
Toshiba Corp
Original Assignee
Toshiba 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 Toshiba Corp filed Critical Toshiba Corp
Priority to JP33212587A priority Critical patent/JPH01171908A/en
Publication of JPH01171908A publication Critical patent/JPH01171908A/en
Pending legal-status Critical Current

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  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

PURPOSE:To prevent a molding from cutting out or scorching by providing a gas passage of the shape that the holding accuracy of an abutment position of a core upon a core holder is not lost on the face where the core abuts on the holder or on faces of mutual abutment of the cores. CONSTITUTION:In a step of feeding resin from a gate 10 to a cavity 11, gas is discharged from a gas vent slot 18 formed at a parting line and an ejector pin 19, and discharged from a gas passage formed by the relief 32a of a core 32 and the through hole 33a of a slide core 33. Since the relief 32a is formed at the core 32 and partly formed, the relative positional accuracy due to the engagement of the core 33 with the core 32 is similarly obtained to the case that the relief 32a is not formed. That is, since the gas is discharged from the engaging part of the core 32 with the core 33, it can prevent the molding from scorching or cutting out.

Description

【発明の詳細な説明】 [発明の目的] (産業上の利用分野) 本発明は、樹脂成形金型、ダイカスト金型等の金型に関
する。
Detailed Description of the Invention [Object of the Invention] (Industrial Application Field) The present invention relates to molds such as resin molding molds and die casting molds.

(従来の技術) 一般に樹脂成形金型、ダイカスト金型等の金型では、キ
ャビティ内に凸状部分を形成するコアにより、成形品の
内面の形成や、雄型の彫刻面あるいはアンダカット部の
形成を行なう。
(Prior art) Generally, in molds such as resin molding molds and die-casting molds, a core that forms a convex part in the cavity is used to form the inner surface of the molded product, and to form the engraved surface or undercut part of the male mold. Perform formation.

このようなコアは、第11図および第12図に示すよう
に、ホルダ1aにビン2aを嵌合させキャビティ3a内
に凸部を形成したり、第13図および第14図に示すよ
うに、ホルダ1bに異形状のブロック2bを嵌合させキ
ャビティ3b内に凸部を形成して構成する場合と、第1
5図および第16図に示すように、型材1cを直接加工
してキャビティ3c内に凸部2cを形成して構成する場
合とがある。
Such a core can be formed by fitting the bottle 2a into the holder 1a to form a convex portion in the cavity 3a, as shown in FIGS. 11 and 12, or by forming a protrusion in the cavity 3a, as shown in FIGS. 13 and 14. There is a case in which an irregularly shaped block 2b is fitted into the holder 1b and a convex portion is formed in the cavity 3b, and a first
As shown in FIGS. 5 and 16, there is a case where the mold material 1c is directly processed to form a convex portion 2c inside the cavity 3c.

第17図は、このようなコアを備えた従来の金型の一例
として、スライドコアを有するプラスチック金型を示す
もので、キャビティ11内に凸状部分を形成するコア1
2は、スライドコア(コアホルダ)13と別体に構成さ
れており、スライドコア13に嵌合され、保持されるよ
う構成されている。
FIG. 17 shows a plastic mold having a sliding core as an example of a conventional mold equipped with such a core.
2 is configured separately from the slide core (core holder) 13, and is configured to be fitted into and held by the slide core 13.

また、キャビティ11内には、上記コア12の他に、コ
ア14、コア15、コア16が配置されており、コア1
4にはコア12の先端部が挿入される穴が設けられてい
る。
In addition to the core 12, a core 14, a core 15, and a core 16 are arranged inside the cavity 11, and the core 1
4 is provided with a hole into which the tip of the core 12 is inserted.

そして、スライドガイド17によってガイドされたスラ
イドコア13が移動し、コア14の上記穴にコア12の
先端部が挿入された状態で、図示しないゲートからキャ
ビティ11内に樹脂を流入させる。この時、キャビティ
11内のエアや樹脂が発生するガスをキャビティ1の外
へ排出しなければならない。そこで、パーティングライ
ンにたとえば0,02〜0.03mm程度のガスベント
用溝18を設け、この部分からキャビティ11内のガス
を排出するよう構成されている。また、エジェクタビン
19の部分からもガスが排出される。
Then, the slide core 13 guided by the slide guide 17 is moved, and with the tip of the core 12 inserted into the hole of the core 14, resin is caused to flow into the cavity 11 from a gate (not shown). At this time, the air inside the cavity 11 and the gas generated by the resin must be discharged to the outside of the cavity 1. Therefore, a gas vent groove 18 of, for example, about 0.02 to 0.03 mm is provided in the parting line, and the gas inside the cavity 11 is discharged from this part. Further, gas is also discharged from the ejector bin 19 portion.

(発明が解決しようとする問題点) しかしながら、上記説明の従来の金型では、成形品の形
状によってはキャビティ内の排気が行なえず、成形品に
カケ(ショート)やヤケが発生してしまうという問題が
ある。
(Problems to be Solved by the Invention) However, with the conventional mold described above, depending on the shape of the molded product, the inside of the cavity cannot be evacuated, resulting in chipping (short-circuiting) or discoloration of the molded product. There's a problem.

たとえば、第17図に示した金型では、符号D1Fで示
すような部分にはガスが残るため、第18図および第1
9図に示すように、上記り、Eに相当する成形品21の
部位にカケ21aやヤケ21bが発生してしまう。そこ
で、たとえば第20図に示すように、コアホルダ13と
コア12とのクリアランスαを、たとえば0.02〜0
.03mm程度と大きクシ、排気することもできるが、
この場合には両者の間にクリアランス部分の位置ズレが
発生し、コア12の位置精度が保たれず、たとえばコア
12をコア14の穴に挿入する際に、コア12が破損す
る恐れが生じる。
For example, in the mold shown in Fig. 17, gas remains in the part indicated by the symbol D1F, so the mold shown in Fig. 18 and 1
As shown in FIG. 9, chips 21a and discoloration 21b occur in the portion of the molded product 21 corresponding to E above. Therefore, as shown in FIG. 20, for example, the clearance α between the core holder 13 and the core 12 is set to 0.02 to 0.
.. The comb is large, about 0.3mm, and can be exhausted, but
In this case, a positional shift occurs in the clearance portion between the two, and the positional accuracy of the core 12 is not maintained. For example, when the core 12 is inserted into the hole of the core 14, there is a risk that the core 12 will be damaged.

本発明は、かかる従来の事情に対処してなされたもので
、キャビティ内にガスが残ることを防止し、成形品にカ
ケやヤケが発生することを防止することができるととも
に、コアホルダとコアとの位置精度を従来と同様に高精
度に保つことのできる金型を提供しようとするものであ
る。
The present invention has been made in response to such conventional circumstances, and can prevent gas from remaining in the cavity, prevent chipping or discoloration from occurring in the molded product, and can also prevent the core holder and core from forming. The purpose of this invention is to provide a mold that can maintain the same high positional accuracy as before.

[発明の構成] (問題点を解決するための手段) すなわち、本発明は、キャビティ内に凸状部分を形成す
るコアを備えた金型において、前記コアをコアホルダと
別体に構成して、該コアホルダに嵌合させ保持するよう
構成し、かつ、前記コアと前記コアホルダの当接面ある
いは前記コア同士の当接面に、この当接部位の保持精度
を損わない形状のガス流路を設けたことを特徴とする。
[Structure of the Invention] (Means for Solving the Problems) That is, the present invention provides a mold including a core that forms a convex portion in a cavity, in which the core is configured separately from a core holder, A gas flow path configured to fit and hold the core holder, and having a shape that does not impair the holding accuracy of the abutment portion, on the abutment surface between the core and the core holder or the abutment surface between the cores. It is characterized by having been provided.

(作 用) 上記構成の本発明の金型では、コアとコアホルダの当接
面あるいはコア同士の当接面に、この当接部位の保持精
度を損わない形状のガス流路が設けられている。
(Function) In the mold of the present invention having the above configuration, a gas flow path having a shape that does not impair the holding accuracy of this contact area is provided on the contact surface between the core and the core holder or the contact surface between the cores. There is.

したがって、コアホルダとコアとの位置精度を従来と同
様に高精度に保つことができるとともに、キャビティ内
にガスが残ることを防止し、成形品にカケやヤケが発生
することを防止することができる。
Therefore, the positional accuracy between the core holder and the core can be maintained at the same high precision as before, and gas can be prevented from remaining in the cavity, thereby preventing chipping or discoloration from occurring in the molded product. .

(実施例) 以下、本発明の金型の詳細を図面を参照して実施例につ
いて説明する。なお、前述の第17図に示した従来の金
型と同一部分には同一符号を付して重複した説明は省略
する。
(Example) Hereinafter, details of the mold of the present invention will be described with reference to the drawings. Incidentally, the same parts as those of the conventional mold shown in FIG. 17 described above are given the same reference numerals, and redundant explanation will be omitted.

第1図〜第3図は本発明の一実施例のスライドコアを有
するプラスチック金型を示すもので、キャビティ11内
に凸状部分を形成するコア32は、スライドコア(コア
ホルダ)33と別体に構成されており、スライドコア3
3に嵌合され、保持されるよう構成されている。
1 to 3 show a plastic mold having a slide core according to an embodiment of the present invention, in which a core 32 forming a convex portion inside the cavity 11 is formed separately from a slide core (core holder) 33. It is configured with slide core 3
3 and is configured to be held.

また、第4図〜第6図にも示すように、コア32とスラ
イドコア33との嵌合部分、すなわちコア32とスライ
ドコア33との当接面には、コア32側にたとえば0.
02〜0.03mm程度のニゲ32aが設けられている
。また、スライドコア33には、上記嵌合部分と外側と
を連通ずる貫通口33aが設けられており、この貫通口
33aとニゲ32aとによって、キャビティ11内から
ガス抜きを行うためのガス流路が形成されている。
Further, as shown in FIGS. 4 to 6, the fitting portion between the core 32 and the slide core 33, that is, the abutment surface between the core 32 and the slide core 33, has a 0.05 mm diameter on the core 32 side.
A overhang 32a of about 0.02 to 0.03 mm is provided. Further, the slide core 33 is provided with a through hole 33a that communicates the fitting portion with the outside, and this through hole 33a and the nip 32a create a gas flow path for venting gas from inside the cavity 11. is formed.

上記構成のこの実施例の金型では、ゲート10からキャ
ビティ11内に樹脂を流入させる過程において、従来の
金型と同様に、パーティングラインに設けられたガスベ
ント用溝18、エジェクタビン19の部分からガスが排
出されるとともに、コア32のニゲ32aとスライドコ
ア33の貫通口33aによって形成されるガス流路から
ガスが排出される。また、コア32にはニゲ32aが形
成されているが、このニゲ32aは部分的に形成されて
いるため、スライドコア33とコア32との嵌合による
相対的な位置精度は、ニゲ32aがない場合と同様に確
保される。
In the mold of this embodiment having the above configuration, in the process of flowing the resin into the cavity 11 from the gate 10, the gas vent groove 18 provided in the parting line and the ejector bin 19 are At the same time, gas is discharged from the gas passage formed by the nip 32a of the core 32 and the through hole 33a of the slide core 33. Further, although the core 32 is formed with a nip 32a, since the nip 32a is only partially formed, the relative positional accuracy due to the fitting of the slide core 33 and the core 32 is difficult to achieve without the nip 32a. secured in the same manner as the case.

すなわち、この実施例の金型では、コア32とスライド
コア33との嵌合部分からガスが排出されるため、第1
図に符号りで示す部分において成形品にヤケやカケが発
生することを防止することができる。
That is, in the mold of this embodiment, gas is discharged from the fitting portion between the core 32 and the slide core 33, so the first
It is possible to prevent the molded product from being discolored or chipped at the portion indicated by the reference numeral in the figure.

また、スライドコア33とコア32の位置精度は、従来
と同様に確保されている。このため、スライドコア33
が動きコア32の先端とコア14の穴が嵌合する時に、
コア32とコア14の位置ズレは、第2図に符号βで示
すスライドコア33とスライドガイド17とのクリアラ
ンス分しか生じない。したがって従来と同様にコア14
の穴寸法をコア32の先端寸法より9979778分大
きくとることにより、スライド運動時のコア32の破損
を防止することができる。
Further, the positional accuracy of the slide core 33 and the core 32 is ensured as in the conventional case. For this reason, the slide core 33
moves and when the tip of the core 32 and the hole of the core 14 fit together,
The positional deviation between the core 32 and the core 14 occurs only by the clearance between the slide core 33 and the slide guide 17, which is indicated by the symbol β in FIG. Therefore, as before, the core 14
By making the hole size 9979778 larger than the tip size of the core 32, it is possible to prevent the core 32 from being damaged during sliding movement.

なお、コア32とコアホルダ33との嵌合部分に形成す
るガス流路は、第7図および第8図に示すように、コア
ホルダ33の嵌合孔を、コア32より半径で0.02m
m程度大きくし、コア32の根元部分の径をこの径にあ
わせて大径とし、この部分にニゲ32aを設けて、コア
32まわり全域でガス抜きを行ないかん合部で数ケ所か
らそのガスを逃がすよう構成することもできる。
Note that the gas flow path formed at the fitting portion of the core 32 and the core holder 33 has a fitting hole of the core holder 33 at a radius of 0.02 m from the core 32, as shown in FIGS. 7 and 8.
m, the diameter of the root part of the core 32 is increased to match this diameter, and a nip 32a is provided in this part to vent gas from several places around the core 32. It can also be configured to escape.

また、たとえば第1図の金型構成において、同図に符号
Eで示す部分にガス抜き不良が発生し、成形品ににヤケ
が発生する場合、コア15とコア16とを分割式にし、
第9図に示すようにコア15とコア16との当接面のた
とえばコア16側にo、 o2mm程度のガス抜き用の
W416aを形成することにより、この部分からガス抜
きを行なうことができる。
For example, in the mold configuration shown in FIG. 1, if degassing occurs in the part indicated by the symbol E in the same figure and the molded product becomes discolored, the core 15 and the core 16 may be separated.
As shown in FIG. 9, by forming a degassing W416a of about 0.02 mm on the core 16 side of the contact surface between the core 15 and the core 16, degassing can be performed from this part.

さらに、本発明は第10図に示すようなようなインサー
ト成形の場合にも適用できる。すなわち、コア40によ
りインサート部品41をガイドさせ、キャビティ42の
インサート部品頭部挿入穴43に挿入する場合、キャビ
ティ42とコア40との位置精度が要求されるため、本
発明を適用し、コア40の嵌合部分に前述の実施例と同
様なガス流路を設けることにより、位置精度とガス抜き
の二つの要求を満たすことができる。
Furthermore, the present invention can also be applied to the case of insert molding as shown in FIG. That is, when the insert component 41 is guided by the core 40 and inserted into the insert component head insertion hole 43 of the cavity 42, positional accuracy between the cavity 42 and the core 40 is required. By providing a gas flow path similar to that of the above-mentioned embodiment in the fitting portion, the two requirements of positional accuracy and gas venting can be satisfied.

[発明の効果] 以上説明したように、本発明の金型によれば、複雑な形
状のキャビティを有する場合でも、キャビティ内にガス
が残ることを防止することができ、またコアホルダとコ
アとの位−置精度も従来と同様に高精度に保つことがで
きる。したがってスライダ機構を有する金型の嵌合部の
コアの破損を防止することができ、かつ、ヤケやカケの
ない高精度な成形品を得ることができる。
[Effects of the Invention] As explained above, according to the mold of the present invention, even when the mold has a complex shape, gas can be prevented from remaining in the cavity, and the relationship between the core holder and the core can be prevented. Positional accuracy can also be maintained at a high level of accuracy as in the conventional case. Therefore, it is possible to prevent the core of the fitting portion of the mold having the slider mechanism from being damaged, and to obtain a highly accurate molded product without any discoloration or chipping.

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

第1図は本発明の一実施例の金型を示す縦断面図、第2
図は第1図に示す金型の横断面図、第3図は第2図のA
−A高面図、第4図はコアの側面図、第5図は第4図に
示すコアの正面図、第6図は第4図に示すコアの斜視図
、第7図は本発明の変形例の要部を示す縦断面図、第8
図は第7図の正面図、第9図はその他の変形例の要部を
示す斜視図、第10図はインサート成形を説明するため
の金型の要部を示す縦断面図、第11図は金型の要部を
示す正面図、第12図は第11図に示す金型の縦断面図
、第13図は金型の要部を示す正面図、第14図は第1
3図に示す金型の縦断面図、第15図は金型の要部を示
す正面図、第16図は第15図に示す金型の縦断面図、
第17図は従来の金型を示す縦断面図、第18図および
第19図は第17図に示す金型によって成形された成形
品を示す斜視図、第20図は従来の金型の要部を示す縦
断面図である。 11・・・・・・・・・・・・キャビティ32・・・・
・・・・・・・・コア 32a・・・・・・・・・ニゲ 33・・・・・・・・・・・・スライドコア(コアホル
ダ)33a・・・・・・・・・貫通口 第2図   L、A 第4図  第5図  第6図 第7図      第8図 第9図     第1o図 第13図 第15図
Fig. 1 is a vertical sectional view showing a mold according to an embodiment of the present invention, Fig.
The figure is a cross-sectional view of the mold shown in Figure 1, and Figure 3 is A of Figure 2.
-A top view, FIG. 4 is a side view of the core, FIG. 5 is a front view of the core shown in FIG. 4, FIG. 6 is a perspective view of the core shown in FIG. 4, and FIG. 7 is a side view of the core shown in FIG. Vertical sectional view showing the main part of the modification, No. 8
The figure is a front view of Fig. 7, Fig. 9 is a perspective view showing the main parts of another modification, Fig. 10 is a vertical sectional view showing the main parts of the mold to explain insert molding, and Fig. 11 12 is a longitudinal sectional view of the mold shown in FIG. 11, FIG. 13 is a front view showing the main part of the mold, and FIG. 14 is a front view showing the main parts of the mold.
3 is a vertical sectional view of the mold shown in FIG. 15, a front view showing the main parts of the mold, FIG. 16 is a vertical sectional view of the mold shown in FIG. 15,
FIG. 17 is a longitudinal sectional view showing a conventional mold, FIGS. 18 and 19 are perspective views showing a molded product formed by the mold shown in FIG. 17, and FIG. FIG. 11...Cavity 32...
......Core 32a...Nigure 33...Slide core (core holder) 33a...Through hole Figure 2 L, A Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 1o Figure 13 Figure 15

Claims (1)

【特許請求の範囲】[Claims] (1)キャビティ内に凸状部分を形成するコアを備えた
金型において、前記コアをコアホルダと別体に構成して
、該コアホルダに嵌合させ保持するよう構成し、かつ、
前記コアと前記コアホルダの当接面あるいは前記コア同
士の当接面に、この当接部位の保持精度を損わない形状
のガス流路を設けたことを特徴とする金型。
(1) In a mold including a core that forms a convex portion in a cavity, the core is configured separately from a core holder and is configured to be fitted and held in the core holder, and
A mold characterized in that a gas flow path is provided on a contact surface between the core and the core holder or a contact surface between the cores, the shape of which does not impair the holding precision of the contact portion.
JP33212587A 1987-12-28 1987-12-28 Metal mold Pending JPH01171908A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP33212587A JPH01171908A (en) 1987-12-28 1987-12-28 Metal mold

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP33212587A JPH01171908A (en) 1987-12-28 1987-12-28 Metal mold

Publications (1)

Publication Number Publication Date
JPH01171908A true JPH01171908A (en) 1989-07-06

Family

ID=18251429

Family Applications (1)

Application Number Title Priority Date Filing Date
JP33212587A Pending JPH01171908A (en) 1987-12-28 1987-12-28 Metal mold

Country Status (1)

Country Link
JP (1) JPH01171908A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH035058A (en) * 1989-05-31 1991-01-10 Ahresty Corp Core pin for die
JP2002126864A (en) * 2000-10-23 2002-05-08 Dynamo:Kk Core pin for die

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH035058A (en) * 1989-05-31 1991-01-10 Ahresty Corp Core pin for die
JP2002126864A (en) * 2000-10-23 2002-05-08 Dynamo:Kk Core pin for die

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