JPH02147155A - Gas vent device for die - Google Patents

Gas vent device for die

Info

Publication number
JPH02147155A
JPH02147155A JP63299447A JP29944788A JPH02147155A JP H02147155 A JPH02147155 A JP H02147155A JP 63299447 A JP63299447 A JP 63299447A JP 29944788 A JP29944788 A JP 29944788A JP H02147155 A JPH02147155 A JP H02147155A
Authority
JP
Japan
Prior art keywords
molten metal
gas vent
valve
gas
level
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
Application number
JP63299447A
Other languages
Japanese (ja)
Other versions
JPH0751265B2 (en
Inventor
Minoru Kuriyama
稔 栗山
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.)
Ube Corp
Original Assignee
Ube Industries Ltd
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 Ube Industries Ltd filed Critical Ube Industries Ltd
Priority to JP63299447A priority Critical patent/JPH0751265B2/en
Priority to AU45669/89A priority patent/AU614476B2/en
Priority to EP89121948A priority patent/EP0371465B1/en
Priority to DE68917094T priority patent/DE68917094T2/en
Priority to US07/442,213 priority patent/US5004038A/en
Priority to CA002004157A priority patent/CA2004157A1/en
Priority to KR1019890017780A priority patent/KR970005521B1/en
Publication of JPH02147155A publication Critical patent/JPH02147155A/en
Publication of JPH0751265B2 publication Critical patent/JPH0751265B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

PURPOSE:To always stably enable gas exhaust in cavity for product by detecting sound wave generating when molten metal collides to the wall face of a die and closing a gas vent valve with an electric signal in the case the detected signal level is larger than the reference level. CONSTITUTION:In the gas vent device for the die, the gas vent valve 1 is arranged at end part of gas vent passage 8 from the cavity 7 in the dies 2, 3. A soundwave detecting instrument 19 is arranged on the way of the gas vent passage 8, and passing of the molten metal is detected with the soundwave generating when the molten metal 9 collides to the wall face. The detected level is compared with the reference level with the valve-shut mechanisms 22, 23 and 26 and when the detected signal level is larger than the reference level, the valve 1 is closed with the electric signal.

Description

【発明の詳細な説明】 [産業上の利用分野] −本発明はグイカストヤシンや射出成形機などの射出成
形装置による射出成形時に、金型のキャビティからガス
を抜き取る金型用ガス抜き装置に関するものである。
[Detailed Description of the Invention] [Field of Industrial Application] - The present invention relates to a gas venting device for a mold that extracts gas from a cavity of a mold during injection molding using an injection molding device such as a cast iron or an injection molding machine. be.

[従来の技術1 本発明に類する従来技術としては、特開昭63−800
59号公報に記載されている技術がある。
[Prior art 1] As a prior art similar to the present invention, Japanese Patent Application Laid-Open No. 63-800
There is a technique described in Publication No. 59.

この技術は、お互いに絶縁された2電極から成る溶湯検
知センサにキャビティよりの溶湯が到達して溶湯検知セ
ンナが短絡し、これによりスイッチング回路が直ちに作
用して、エアー電磁弁または電磁コイルが作動すること
によりガス抜き弁を閉じるものである。
In this technology, molten metal from the cavity reaches a molten metal detection sensor consisting of two electrodes that are insulated from each other, causing a short circuit in the molten metal detection sensor, which immediately activates the switching circuit and activates the air solenoid valve or electromagnetic coil. This closes the gas vent valve.

[発明が解決しようとする課題] 前記従来技術においては、キャビティからの溶湯が塊状
になってガス抜き通路内を移動してくる場合には容易に
溶湯を検知でき、ガス抜き弁を閉じることにより溶湯は
ガス抜き弁内に侵入することはない、しょかしながら、
実際の鋳造時には、キャビティからの溶湯が塊状になっ
てガス抜き通路内を移動してくることは希であり、一般
にはフレーク状であったり粒状であったりすることが多
い、溶湯検知センサがお互いに絶縁された2電極からな
っているため、これらのフレークや粒を検知することが
できず、したがってガス抜き弁を閉しることができず、
該ガス抜き弁内に溶湯のフレークや粒が侵入し、これら
が弁のシート面に噛み込むことにより、大量に溶湯がガ
ス抜き弁内に侵入することがあった。
[Problems to be Solved by the Invention] In the above-mentioned prior art, when the molten metal from the cavity becomes a lump and moves in the gas vent passage, the molten metal can be easily detected, and the molten metal can be detected by closing the gas vent valve. Molten metal will not enter the gas vent valve, however,
During actual casting, it is rare for the molten metal from the cavity to form into lumps and move through the gas venting passage, and generally the molten metal is in the form of flakes or granules. Since it consists of two insulated electrodes, these flakes and particles cannot be detected and therefore the gas vent valve cannot be closed.
Flakes and grains of molten metal may enter the gas vent valve and get caught in the seat surface of the valve, resulting in a large amount of molten metal entering the gas vent valve.

[課題を解決するための手段] このような問題点を解決するために、本発明においては
、溶湯通路内に配置されて溶湯の通路を溶湯が金型壁面
に衝突する際に発生する音波を検出する検出装置と、検
出信号レベルを基準レベルと比較し、検出信号レベルが
基準レベルより大きい場合に電気信号によりガス抜き弁
を閉じる弁閉機構とを接続して金型用ガス抜き装置を構
成した。
[Means for Solving the Problems] In order to solve these problems, in the present invention, a device is installed in the molten metal passage to reduce the sound waves generated when the molten metal collides with the mold wall surface. A mold gas venting device is configured by connecting a detection device to detect the detection signal level with a reference level and a valve closing mechanism that closes the gas venting valve using an electric signal when the detection signal level is higher than the reference level. did.

[作用] 金型キャビティを通過した後、ガス抜き弁方向に向かっ
てガス抜き通路を移動する溶湯が金型壁に衝突する際に
発生する音波を検出装置により検出し、検出信号レベル
が基準レベルより大きい場合に溶湯が音波検出装置部ま
で来たという電気信号を発し、この電気信号によりガス
抜き弁を閉じる。
[Operation] After passing through the mold cavity, the detection device detects the sound waves generated when the molten metal moves through the gas vent passage toward the gas vent valve and collides with the mold wall, and the detection signal level is at the reference level. If it is larger than that, an electric signal is generated indicating that the molten metal has reached the sonic wave detection device, and this electric signal closes the gas vent valve.

[実施例] 第1図はガス抜き装置とこれを実施した金型の一部を示
すもので第2図のI−I線断面図、第2図は第1図のI
I −II線断面図、第3図は音波検出による弁閉指令
系統図を示す。
[Example] Figure 1 shows a degassing device and a part of the mold in which it was implemented, and is a sectional view taken along line I-I in Figure 2, and Figure 2 is a cross-sectional view taken along line I-I in Figure 1.
The I-II line sectional view and FIG. 3 show a valve closing command system diagram based on sound wave detection.

第1図および第2図において、2は可動金型、3は固定
金型、7は製品キャビテ仁9は溶湯、lOは押出板、1
1は押出ピンであって、可動金型2の上部の凹部にはガ
ス抜き弁lがはめ込まれ、可動金型2とともに前後摺動
可能になっている。
1 and 2, 2 is a movable mold, 3 is a fixed mold, 7 is a product cavity 9 is a molten metal, IO is an extrusion plate, 1
Reference numeral 1 denotes an extrusion pin, and a gas vent valve 1 is fitted into a recessed portion in the upper part of the movable mold 2, so that it can slide back and forth together with the movable mold 2.

また、製品キャビティ7の上部には、ガス抜き溝8を経
由してガス抜き弁lが取付けられており、ガス抜きt+
118は第2図に示すように、折れ曲がっており、その
途中に、溶湯9の衝突時に発生する音波の振幅の大きさ
を検出することによって溶湯9が到達したことを検出す
る検出袋M19が配設されている。ガス抜き弁lは、弁
体4.弁棒5゜ガス排出孔6.弁座12.ガス排出室1
3.コア20、継手21.圧縮コイルばね22およびソ
レノイド23から構成されており、コア20は継手21
を介して弁棒5の後部に連結され、弁棒5の前部には弁
体4が連結されている。また、コア20の周面に沿って
ソレノイド23が設けてあり、通電するとコア20が第
1図の左方向に移動することで、第1図に示すように、
弁体4が弁座12から離れてガス抜き弁lは開き、ソレ
ノイド23への通電を停止、すなわち、電気回路を遮断
することにより、圧縮コイルばね22の伸び作用で弁体
4が弁座12に密着してガス抜き弁1は閉じるように形
成されている。溶湯9が到達したことを検出する検出袋
fi19はセンサブロック24と音波センサ25から形
成され、検出装置19で検出されたデータ、すなわち、
溶湯9の衝突時に発生する音波の振幅の大きさは、基準
音波設定装置17であらかじめ設定しである基準数値、
すなわち、あらかじめ経験ないしはテストによって求め
ておいた溶湯9が到達したことを検知できる最低限の音
波の振幅の大きさと、比較器26で比較されて、前記デ
ータが基準数値以上の場合、溶湯9が到達したと判断し
、弁閉の指令信号をソレノイド23に出すように形成さ
れている。
Further, a gas vent valve l is attached to the upper part of the product cavity 7 via a gas vent groove 8.
118 is bent as shown in FIG. 2, and a detection bag M19 is arranged in the middle of the bend to detect the arrival of the molten metal 9 by detecting the magnitude of the amplitude of the sound wave generated when the molten metal 9 collides with the molten metal 9. It is set up. The gas vent valve l has a valve body 4. Valve stem 5° Gas discharge hole 6. Valve seat 12. Gas discharge chamber 1
3. Core 20, joint 21. It is composed of a compression coil spring 22 and a solenoid 23, and the core 20 is connected to the joint 21.
The valve body 4 is connected to the rear part of the valve stem 5 via the valve stem 5, and the valve body 4 is connected to the front part of the valve stem 5. Further, a solenoid 23 is provided along the circumferential surface of the core 20, and when energized, the core 20 moves to the left in FIG. 1, as shown in FIG.
When the valve element 4 separates from the valve seat 12, the gas vent valve l opens, and the energization to the solenoid 23 is stopped, that is, the electric circuit is cut off. The gas vent valve 1 is formed so as to be closed in close contact with the gas vent valve 1. The detection bag fi19 that detects the arrival of the molten metal 9 is formed from a sensor block 24 and a sonic sensor 25, and detects the data detected by the detection device 19, that is,
The magnitude of the amplitude of the sound wave generated when the molten metal 9 collides with a reference value set in advance by the reference sound wave setting device 17,
That is, the comparator 26 compares the minimum amplitude of the sound wave that can detect the arrival of the molten metal 9, which has been determined in advance through experience or testing, and if the data is greater than the reference value, the molten metal 9 is detected. It is configured to determine that the valve has been reached and issue a command signal to the solenoid 23 to close the valve.

以上のように構成された金型用ガス抜き装置の動作につ
いて説明する。
The operation of the mold degassing device configured as above will be explained.

製品キャビティ7に溶湯9が射出されるより前から、比
較器26によりソレノイド23は通電され、その作用力
は圧縮コイルばね22のそれより大きく、ガス抜き弁l
は開いている。この状態で溶湯9が製品キャビティ7内
に射出される。溶湯9は製品キャビティ7内をほぼ充填
した後、ガス抜き溝8に到達する。ガス抜き溝8内を直
進する溶湯9はセンサブロー、り24に衝突する。音波
センサ25はこの衝突音を検出し、信号を比較器26に
送る。比較器26は、音波センサ25の検出信号レベル
S1をあらかじめ定めておいた基準レベルS2と比較し
、基準レベルS2よりも大きい場合には、ツルイド23
への電流を遮断し、したがって、ガス抜き弁1は圧縮コ
イルばね22の作用により閉じる。この時、ガス抜き弁
lが閉じた後に溶湯9がガス抜き弁1部に到達するよう
に、ガス抜き溝8の長さを設定することにより、溶湯9
はガス抜き弁1内に侵入しない。
Before the molten metal 9 is injected into the product cavity 7, the solenoid 23 is energized by the comparator 26, its acting force is greater than that of the compression coil spring 22, and the degassing valve l
is open. In this state, the molten metal 9 is injected into the product cavity 7. After the molten metal 9 almost fills the inside of the product cavity 7, it reaches the gas vent groove 8. The molten metal 9 traveling straight through the gas vent groove 8 collides with the sensor blower 24. Sonic sensor 25 detects this collision sound and sends a signal to comparator 26 . The comparator 26 compares the detection signal level S1 of the sonic sensor 25 with a predetermined reference level S2, and if it is higher than the reference level S2, the TRUID 23
The degassing valve 1 is therefore closed by the action of the compression coil spring 22. At this time, by setting the length of the gas vent groove 8 so that the molten metal 9 reaches the first part of the gas vent valve 1 after the gas vent valve l is closed, the molten metal 9
does not enter the gas vent valve 1.

ガス抜き弁l内に侵入してもさしつかえのない程度の溶
湯9のフレークや粒がセンサブロック24に衝突する時
の最大の検出信号レベルを基準レベルとすれば、溶湯9
がガス抜き弁l内へ侵入することなしに、常に安定して
製品キャビティ7内に残留するガス量を少なくするよう
にガス抜きができる。
If the maximum detection signal level when flakes or grains of the molten metal 9 that can enter the gas vent valve l collide with the sensor block 24 is taken as the reference level, then the molten metal 9
Gas can be vented in a stable manner at all times to reduce the amount of gas remaining in the product cavity 7 without entering the gas vent valve l.

なお、第3図に示すように、ガス抜き溝8内を直進する
溶湯9がセンサブロック24に衝突する時に発する衝突
音の音波を音波検出装置19のセンサブロック24で受
信し、受信したセンサの出力(検出信号レベルS+)を
前置増幅器14で増幅し、帯域フィルタ15を通し、主
増幅器16にて再度増幅した後、あらかじめ基準音波設
定装置17で設定して比較器26に入力しである基準信
号のレベル(S2)と比較し、S1≧S2の場合に、溶
湯9がガス抜き溝8の途上に配設されたセンサブロック
24に衝突したことを検知し、比較器26から弁閉指令
が発せられて弁閉機構18の一部を形成しているソレノ
イド23の電気回路が遮断され、圧縮コイルばね22の
復元力によって弁棒5に付随した弁体4が弁座12に密
着して、ガス抜き溝8からガス排出室13を経由して行
なわれているガス排出孔6からのガスの排出が停止され
ることになる。
As shown in FIG. 3, the sensor block 24 of the sonic wave detection device 19 receives the sound waves of the impact sound emitted when the molten metal 9 moving straight in the gas vent groove 8 collides with the sensor block 24, and the sensor block 24 of the sound wave detection device 19 receives the sound waves. The output (detection signal level S+) is amplified by the preamplifier 14, passed through the bandpass filter 15, amplified again by the main amplifier 16, and then set in advance by the reference sound wave setting device 17 and input to the comparator 26. It is compared with the reference signal level (S2), and if S1≧S2, it is detected that the molten metal 9 has collided with the sensor block 24 disposed in the middle of the gas vent groove 8, and the comparator 26 issues a valve closing command. is generated, the electric circuit of the solenoid 23 forming a part of the valve closing mechanism 18 is cut off, and the restoring force of the compression coil spring 22 causes the valve body 4 attached to the valve stem 5 to come into close contact with the valve seat 12. Then, the gas discharge from the gas discharge hole 6 which is being carried out from the gas vent groove 8 via the gas discharge chamber 13 is stopped.

前記実施例においては、ソレノイド23によって操作さ
れるガス抜き弁1で本発明を説明したが、流体圧により
操作されるガス抜き弁を用いてもよい、また1本願の発
明者の発明に係る特願昭62−288515号にあるよ
うに、溶湯9の衝突力によっても閉じ得る構造の弁に本
発明を組込んだ構造としてもよい、また、ガス抜き弁1
は固定金型3に取り付けることもできる。さらに、前記
実施例においては、ガス排出孔6を大気に開放している
状態のものを図示して説明したが、これは、ガス排出孔
6に真空吸引装置を連結し、製品キャビティ7内を減圧
状態にして溶湯9を射出することもできる。
In the above embodiments, the present invention has been described using the gas vent valve 1 operated by the solenoid 23, but a gas vent valve operated by fluid pressure may also be used. As disclosed in Japanese Patent Application No. 62-288515, the present invention may be incorporated into a valve having a structure that can be closed by the collision force of the molten metal 9.
can also be attached to the fixed mold 3. Furthermore, in the embodiment described above, the gas exhaust hole 6 is opened to the atmosphere, but in this case, a vacuum suction device is connected to the gas exhaust hole 6 to suck the inside of the product cavity 7. The molten metal 9 can also be injected under reduced pressure.

[発明の効果] 以上の説明より明らかなように、本発明によれば、金型
用ガス抜き装置において、溶湯通路内に配置されて溶湯
の通過を溶湯が金型壁面に衝突する際に発生する音波を
検出することにより行なう検出装置と、検出信号レベル
を基準レベルと比較し検出信号レベルが基準レベルより
大きい場合に電気信号によりガス抜き弁を閉じる弁閉機
構とを接続したことにより、溶湯がガス抜き弁内へ多量
に侵入すること無しに常に安定して製品キャビティ内の
ガス抜きができる。
[Effects of the Invention] As is clear from the above description, according to the present invention, a degassing device for a mold is arranged in a molten metal passage to prevent the molten metal from passing through when the molten metal collides with the wall surface of the mold. By connecting a detection device that detects the sound waves generated by the molten metal to a valve closing mechanism that compares the detection signal level with a reference level and closes the degassing valve using an electric signal when the detection signal level is higher than the reference level, Gas can be constantly and stably vented from the product cavity without a large amount of gas entering into the vent valve.

【図面の簡単な説明】 第1図および第2図は本発明に係る金型用ガス抜き装置
の1実施例を示し、第1図はガス抜き装置とこれを実施
した金型の一部を示すもので第2図のI−I線断面図、
第2図は第1図の■−■線断面図、第3図は音波検出に
よる弁閉指令系統図を示す。 1・・・ガス抜き弁、 3・・・固定金型、 5・・・弁棒、 2・・・可動金型、 4・・・弁体、 6・・・ガス排出孔、 7・・・製品キャビティ、 9・・・溶湯。 19・・・音波検出装置、 22・・・圧縮コイルばね。 24・・・センサブロック、 26・・・比較器。
[Brief Description of the Drawings] Figures 1 and 2 show an embodiment of the gas venting device for molds according to the present invention, and Figure 1 shows the gas venting device and a part of the mold in which it is installed. A sectional view taken along line I-I in FIG. 2,
FIG. 2 is a sectional view taken along the line ■-■ in FIG. 1, and FIG. 3 is a valve closing command system diagram based on sound wave detection. DESCRIPTION OF SYMBOLS 1... Gas vent valve, 3... Fixed mold, 5... Valve stem, 2... Movable mold, 4... Valve body, 6... Gas discharge hole, 7... Product cavity, 9... Molten metal. 19...Sonic wave detection device, 22...Compression coil spring. 24...Sensor block, 26...Comparator.

Claims (1)

【特許請求の範囲】[Claims] (1)金型キャビティからのガス抜き用通路内の終端部
にガス抜き用の弁を備え、ガス抜き用通路の途中に配置
されて溶湯の通過を溶湯が該通路壁面に衝突する際に発
生する音波を検出する検出装置と、検出信号レベルを基
準レベルと比較し検出信号レベルが基準レベルより大き
い場合に電気信号により前記弁を閉じる弁閉機構とを備
えた金型用ガス抜き装置。
(1) A gas venting valve is provided at the end of the gas venting passage from the mold cavity, and is placed in the middle of the gas venting passage to prevent the passage of molten metal from occurring when the molten metal collides with the wall of the passage. A gas venting device for a mold, comprising: a detection device that detects a sound wave generated by a signal; and a valve closing mechanism that compares a detection signal level with a reference level and closes the valve by an electric signal when the detection signal level is higher than the reference level.
JP63299447A 1988-11-29 1988-11-29 Mold degassing device Expired - Lifetime JPH0751265B2 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
JP63299447A JPH0751265B2 (en) 1988-11-29 1988-11-29 Mold degassing device
AU45669/89A AU614476B2 (en) 1988-11-29 1989-11-28 Degassing apparatus for mold
EP89121948A EP0371465B1 (en) 1988-11-29 1989-11-28 Degassing apparatus for mold
DE68917094T DE68917094T2 (en) 1988-11-29 1989-11-28 Degassing device for mold.
US07/442,213 US5004038A (en) 1988-11-29 1989-11-28 Degassing apparatus for mold
CA002004157A CA2004157A1 (en) 1988-11-29 1989-11-29 Degassing apparatus for mold
KR1019890017780A KR970005521B1 (en) 1988-11-29 1989-11-29 Degassing apparatus for mold

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63299447A JPH0751265B2 (en) 1988-11-29 1988-11-29 Mold degassing device

Publications (2)

Publication Number Publication Date
JPH02147155A true JPH02147155A (en) 1990-06-06
JPH0751265B2 JPH0751265B2 (en) 1995-06-05

Family

ID=17872697

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63299447A Expired - Lifetime JPH0751265B2 (en) 1988-11-29 1988-11-29 Mold degassing device

Country Status (1)

Country Link
JP (1) JPH0751265B2 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6037258A (en) * 1983-06-09 1985-02-26 バイエリツシエ モ−ト−レン ウエルケ アクチエンゲゼルシヤフト Controller of die cast machine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6037258A (en) * 1983-06-09 1985-02-26 バイエリツシエ モ−ト−レン ウエルケ アクチエンゲゼルシヤフト Controller of die cast machine

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JPH0751265B2 (en) 1995-06-05

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