JPS583767A - Gas venting device for die in injection molding device - Google Patents

Abstract

PURPOSE:To discharge gas surely by providing mechanisms of discharging the gas in cavities through a by-pass passage by injection of molten metal into the cavities then closing the bypass passage by pressing of the molten metal. CONSTITUTION:When molten metal is injected from an injection sleeve 8 into cavities 7, the gas of small mass in the cavities 7 passes through a by-pass passage 19 then through a groove 11 and discharges to the outside by passing through a gas discharge passage 4b. The molten metal of large mass incoming after the gas abuts and reflects on the slope of a valve chamber 12, dashes against a valve 13 by changing direction about 90 deg. from the axial line direction of the groove 11 and retreats the valve 13 leftward by disengaging a detaining mechanism 15, thereby shifting the opening ends of the groove and the passage 19 and blocking the opening end of the passage 19 with the circumference of the valve 13. This results in that the passage to the outside is closed by closing the valve 13 by the effect of the molten metal per se and this obviates discharging of the molten metal to the outside of dies. The gas in the cavities 7 is discharged surely.

Description

【発明の詳細な説明】 この発明は、ダイカストマシンや射出成形機等の射出成
形装置において、成形時の金に紳ビテイから大量のガス
を抜取りながら射出し得るように１だ金型用のガス抜き
装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention provides an injection molding apparatus such as a die-casting machine or an injection molding machine, in which a large amount of gas can be injected into the metal during molding while extracting a large amount of gas from the hole. This relates to a extraction device.

従来より、ダイカストは精密な製品を多量に製造する成
形法として広く普及しているが、製品内部に多くの巣が
生じ、満足した強度のものが得られない欠点があった。Conventionally, die casting has been widely used as a molding method for manufacturing precision products in large quantities, but it has the disadvantage that many cavities occur inside the product, making it impossible to obtain products with satisfactory strength.

その理由は、高速かつ高圧で溶融金属をキャビティ内に
充填するため、キャビティ内のガスが十分抜けきらずに
溶融金属と混合して製品中に残存し、製品中に巣を形成
するためである。The reason for this is that since the cavity is filled with molten metal at high speed and high pressure, the gas in the cavity is not sufficiently released and mixes with the molten metal and remains in the product, forming cavities in the product.

本発明はこの欠点をなくすだめのもので、射出成形時に
金型のキャビティ内のガスを確実容易に排出することが
できるようにするとともに、ガス抜き装置の弁を確実に
作動させうるようにしたものである。The present invention aims to eliminate this drawback by making it possible to reliably and easily discharge the gas in the mold cavity during injection molding, and also to ensure that the valve of the degassing device can be operated. It is something.

本発明においては、金型のキャビティから導かれたガス
抜き溝部で、かつ、互いに相対した凹凸部を有する金型
の分離面部に、キャビティから進んで来る被射出溶融物
の作用によってガス抜き溝の軸線方向とは異なる方向に
直接動かされる弁と。In the present invention, the gas venting groove is guided from the cavity of the mold and is formed on the separation surface of the mold having uneven parts facing each other, due to the action of the injected melt advancing from the cavity. and valves that are moved directly in a direction different from the axial direction.

ガス抜き溝から弁の移動路の側面に通じたガス排出用の
通路を設け、弁の開閉作動によりこの通路と金型外部間
のガス排出路の連通遮断を行いうるようにいかつ、閉じ
ている弁を開の状態にする弁開き装置を備えた射出成形
装置における金型用ガス抜き装置とした。そして、閉じ
ている弁を開の状態にする弁開き装置として２例えば、
製品押出板に取付けたピンを用い、製品押出動作と同時
に弁を開きうるようにした。A gas exhaust passage leading from the gas vent groove to the side of the valve travel path is provided, and is closed so that communication between this passage and the outside of the mold can be cut off by opening and closing the valve. This is a gas venting device for a mold in an injection molding machine equipped with a valve opening device that opens the valve. For example, as a valve opening device 2 that opens a closed valve,
A pin attached to the product extrusion plate was used to open the valve simultaneously with the product extrusion operation.

次に２図面に示した実施例によって１本発明の詳細な説
明する。Next, one embodiment of the present invention will be explained in detail with reference to two embodiments shown in the drawings.

第１図〜第６図は本発明の１実施例を説明するもので１
図において符号１は固定盤・符号２は可動盤、３は固定
金型、４は可動金型、５は押出板。Figures 1 to 6 illustrate one embodiment of the present invention.
In the figure, numeral 1 is a fixed plate, 2 is a movable plate, 3 is a fixed mold, 4 is a movable mold, and 5 is an extrusion plate.

６は押出ピン、７は可動金型４のキャビティ、８は射出
スリーブをそれぞれ示し、射出スリーブ８中にはプラン
ジャ９が摺動自在に嵌合されている。Reference numeral 6 indicates an extrusion pin, 7 indicates a cavity of the movable mold 4, and 8 indicates an injection sleeve. A plunger 9 is slidably fitted into the injection sleeve 8.

射出スリーブ８の外方端近傍には溶融金属の供給口８ａ
が形成されている。A molten metal supply port 8a is provided near the outer end of the injection sleeve 8.
is formed.

固定金型己において、キャビティ７の周りの可動金型４
に面する部分には、十分な面積を有する浅いガス抜き溝
１０が形成されている。ガス抜き溝１０は第２図に示す
ように１本のガス抜き溝１１に連通しており、このガス
抜き溝１１は固定金型３の分割面に設けられている。In the fixed mold itself, the movable mold 4 around the cavity 7
A shallow gas venting groove 10 having a sufficient area is formed in the portion facing. As shown in FIG. 2, the gas vent groove 10 communicates with one gas vent groove 11, which is provided on the dividing surface of the fixed mold 3.

このガス抜き溝１１は第１乃至６図に示すように互いに
相対した凹凸部を有する固定金型６および可動金型４の
分割面部に共有状態をもって形成された弁室１２に直行
して連通している。この弁室１２は、第６図に明らかな
ように、ガス抜き溝１１の軸線と直交又はその他の異な
る方向に交差した軸線を有し、その底面は摺鉢状に形成
されだ円錐面となっている。弁室１２中には弁１３が摺
動自在に嵌合されている。弁１３の弁棒１３ａは。As shown in FIGS. 1 to 6, this gas vent groove 11 directly communicates with a valve chamber 12 that is shared between the fixed mold 6 and the movable mold 4, which have concave and convex portions facing each other. ing. As is clear from FIG. 6, this valve chamber 12 has an axis that is perpendicular to the axis of the gas vent groove 11 or intersects in another different direction, and its bottom surface is formed into a mortar shape and has a conical surface. ing. A valve 13 is slidably fitted into the valve chamber 12. The valve stem 13a of the valve 13 is.

可動金型４側に形成され、かつ、弁座１３ｂ部を介して
弁室１２に連続する透孔４ａの方に伸びており、透孔４
ａ部の可動金型４に固定されたガイドブロック１４を摺
動自在に貫通して外方に導かれている。このガイドブロ
ック１４を貫通口ている部分の弁棒１３ａを曲むように
して筒体１６が可動金型４に対してボルト１７によって
固定されてお妬　この筒体１６の先端の裏面と弁棒１３
ａの先端部との間には弁１３を閉じる方向に力が作用す
る引張スプリング１８が弾装されており、且つ、ガイド
ブロック１４の一部にはストッパー１５ａ等の係止機構
１５にて前記引張スプ゛リング等の弾性体１８に抗して
弁１３を開位置にて保持し得るものとする。すなわち９
弾性体１８の引張力は、保止機構１５で弁１３を開状態
に保っている力より小さい。It is formed on the movable mold 4 side and extends toward the through hole 4a which is continuous with the valve chamber 12 via the valve seat 13b.
It slidably passes through a guide block 14 fixed to the movable mold 4 in section a and is guided outward. The cylindrical body 16 is fixed to the movable mold 4 by bolts 17 by bending the valve stem 13a that passes through the guide block 14.
A tension spring 18 that applies a force in the direction of closing the valve 13 is mounted between the tip end of the guide block 14 and a locking mechanism 15 such as a stopper 15a on a part of the guide block 14. It is assumed that the valve 13 can be held in the open position against an elastic body 18 such as a tension spring. i.e. 9
The tensile force of the elastic body 18 is smaller than the force with which the locking mechanism 15 keeps the valve 13 open.

一方、前記ガス抜き溝１１は弁室１２の近傍において、
第２図に示すように左右に分岐した迂回通路１９．１９
を有し、これら迂回通路１９．１９は第２図及び第３図
に示すように互いに相対した凹凸部を有した金型の分割
面に沿って、弁室１２の弁１３の移動路の側面に迂回し
て弁室１２中に開口している。この迂回通路１９の弁室
１２に対する開口部は弁１己の前進状態である非作動時
にあっては、弁１３の弁棒１３ａ側に位置しており。On the other hand, the gas vent groove 11 is located near the valve chamber 12.
Detour passage 19.19 branches to the left and right as shown in Figure 2
As shown in FIGS. 2 and 3, these detour passages 19 and 19 extend along the dividing surface of the mold having concave and convex portions facing each other, and extend from the side surface of the movement path of the valve 13 of the valve chamber 12. It detours around and opens into the valve chamber 12. The opening of this detour passage 19 to the valve chamber 12 is located on the valve stem 13a side of the valve 13 when the valve 1 is in its forward state, i.e., inactive.

前記透孔４ａに連通している。そして、弁１ろが弁座１
３１）に当る位置まで後退移動したときに。It communicates with the through hole 4a. And valve 1 loga valve seat 1
31) when moving backward to the position where it hits.

この開口部は弁１３の外周面で閉じられるようになって
いる。１ 透孔４ａは可動金型４に形成された排出路４ｂに連通し
ている。This opening is closed by the outer peripheral surface of the valve 13. 1 The through hole 4a communicates with a discharge passage 4b formed in the movable mold 4.

弁棒１３ａの端部には復帰杵２３が筒体１６の切欠部１
６ａを通って筒体１６の外方へ突出しており、この復帰
杵２３を製品押出用の製品押出板５に一体に取付けたピ
ン２２で押圧し、前進せしめ、閉じている弁１！１を開
状態にセットし得る構造とした。A return punch 23 is attached to the end of the valve stem 13a in the notch 1 of the cylinder body 16.
6a and protrudes outward from the cylinder 16, this return punch 23 is pressed by a pin 22 integrally attached to the product extrusion plate 5 for extruding the product, and is moved forward to close the closed valve 1!1. It has a structure that allows it to be set in the open state.

なお、ストッパー１５ａ等の係止機構１５は第３図に示
す如く、弁棒１３ａの外周面に設けた切欠段部１３ｃに
ガイドブロック１４内に設けた圧縮バネにてボール１５
ｔ）を押圧する場合に限ることなく、第７図に示す如く
弁棒１３ａ内に圧縮バネとボール１５１）とを内蔵する
場合もある。又−第８図及び第９図に示す如く弁棒１３
ａにテーパー面を形成し、断面が角形の押圧片１５ｃを
弁棒１３ａの左右から弁棒１３ａを押圧挾持する如く形
成する場合、及び第１０図に示す如く板バネ１５ｄにて
弁棒１３ａを押圧挾持する場合、更に第１１図に示す如
く弁棒に板バネを設ける場合等がある。As shown in FIG. 3, the locking mechanism 15 such as the stopper 15a is connected to the ball 15 by a compression spring provided in the guide block 14 at the notch step 13c provided on the outer peripheral surface of the valve stem 13a.
The present invention is not limited to the case where a compression spring and a ball 151) are incorporated in the valve stem 13a, as shown in FIG. 7, as shown in FIG. Also, as shown in FIGS. 8 and 9, the valve stem 13
In the case where a tapered surface is formed on a and a pressing piece 15c having a rectangular cross section is formed so as to press and hold the valve stem 13a from the left and right sides of the valve stem 13a, and as shown in FIG. In the case of pressure clamping, there are also cases where a leaf spring is provided on the valve stem as shown in FIG.

要は弁１６を後退させる力を常に弾性体１８により加え
つつ、弁１３が開状態で維持される係止機構１５を設け
、該係止機構１５は被射出溶融金属が弁１３に与える最
初の衝撃で弁体の挟持係止を開放するものであれば足り
る。なお１弾性体１８は引張りバネを弁棒後端と筒体１
６頂部の裏面との間に設ける場合に限ることなく、圧縮
・；ネを復帰杵２３とガイドブロック１４との間に設け
ることもある。In short, a locking mechanism 15 is provided that maintains the valve 13 in an open state while constantly applying a force for retracting the valve 16 using an elastic body 18. Any device that releases the clamping lock of the valve body upon impact is sufficient. Note that the elastic body 18 connects the tension spring to the rear end of the valve stem and the cylinder body 1.
It is not limited to the case where it is provided between the return punch 23 and the back surface of the top part 6, but it is also possible to provide a compression punch between the return punch 23 and the guide block 14.

次に以上のように構成された本実施例の動作を説明する
。Next, the operation of this embodiment configured as above will be explained.

捷ず、弁１３が開いた状態で型締が行われ、第５図に示
す様に弁１ろが前進位置にて弁室１２内にセットされる
。そして射出スリーブ８中に溶融金属が注入され、射出
プランジャ９が前進すると。The mold is clamped with the valve 13 open without being separated, and the valve 1 is set in the valve chamber 12 at the forward position as shown in FIG. Then, molten metal is injected into the injection sleeve 8 and the injection plunger 9 moves forward.

射出スリーブ８中の溶融金属は高速度でキャビティ７中
へ流入する。これに伴ってキャビティ７中の質量の小さ
いガスはガス抜き溝１０．１１を介して弁室１２の方向
へ導かれる。しかい弁室１２は弁１３で封じられており
、かつ質量の小さいガスでは弁１３を押すことかで・き
ないため、ガスは迂回通路１９を通って弁１３の外側に
迂回し、透孔４ａ及びガス排出路４ｂを逆って外気に排
出される。そしてそのあと被射出溶融物である溶融金属
がガス抜き溝１０．１１を通って進入してくる。The molten metal in the injection sleeve 8 flows into the cavity 7 at high velocity. Accordingly, the gas with a small mass in the cavity 7 is guided in the direction of the valve chamber 12 via the gas vent groove 10.11. However, the valve chamber 12 is sealed by a valve 13, and since gas with a small mass cannot push the valve 13, the gas detours to the outside of the valve 13 through the detour passage 19 and enters the through hole. 4a and gas exhaust path 4b, and is discharged to the outside air. Thereafter, the molten metal to be injected enters through the gas vent groove 10.11.

この溶融金属は質量が大きく、高速であるため。Because this molten metal has a large mass and high velocity.

まず９迂回通路１９方向へは迂回せずに直進し。First, go straight ahead without detouring towards 9 detour path 19.

弁室１２内に向う。Head into the valve chamber 12.

弁室１２の底面は前述したように円錐形状に形成されて
いるため、直進してきた溶融金属がこの斜面に激突し、
はぼ９０度の方向を替えて弁１３の端面に激突する。こ
のとき、最初の溶融金属が弁１３の面に当り、弁１３に
第６図中左方への力が作用し、ボール等からなる係止機
構１５が外れ。As mentioned above, the bottom surface of the valve chamber 12 is formed into a conical shape, so the molten metal that has gone straight collides with this slope,
It changes direction by about 90 degrees and collides with the end face of the valve 13. At this time, the first molten metal hits the surface of the valve 13, a force acts on the valve 13 to the left in FIG. 6, and the locking mechanism 15, which is made of a ball or the like, comes off.

弁１３は図中の左方に押され、且つ、スプリング等の弾
性体１８にて弁は引張られるので、最初の溶融金属によ
る衝撃で弁は高速で後退する如く移動され、透孔４ａの
基端側に形成された弁座ｉ３ｂに着座する。その後、溶
融金属が一瞬とだえてガスが弁に当っても、弁１ろは弾
性体１８にて引張られている故弁が開くことはない。こ
の結果、迂回通路１９の弁室１２に対する開口部は弁１
３の周面によってブロックされ、迂回通路１９と透孔４
ａ＋　ガス排出路４ｂとの連通状態は遮断される。Since the valve 13 is pushed to the left in the figure and pulled by an elastic body 18 such as a spring, the valve is moved backward at high speed by the initial impact from the molten metal, and the base of the through hole 4a is It is seated on a valve seat i3b formed on the end side. Thereafter, even if the molten metal stops momentarily and gas hits the valve, the valve 1 and the valve will not open because they are stretched by the elastic body 18. As a result, the opening of the detour passage 19 to the valve chamber 12 is
3, the detour passage 19 and the through hole 4
Communication with the a+ gas exhaust path 4b is cut off.

この結果、溶融金属自身の作用によってガス排出用の通
路は遮断され、溶融金属の外部への排出は完全に遮断さ
れる。従って、溶融金属は弁室１２及び迂回通路１９に
満たされるが、透孔４ａ内に入らない。As a result, the gas discharge path is blocked by the action of the molten metal itself, and the discharge of the molten metal to the outside is completely blocked. Therefore, the molten metal fills the valve chamber 12 and the detour passage 19, but does not enter the through hole 4a.

なお、上記実施例において、射出成形が終了して溶融金
属が冷却固化し、型開が行われた後にはガス抜き溝１’
ｏ、１１を弁室１２迂回通路１９中に固化した廃棄金属
は、射出製品と一体となって可動金型４に付着した状態
で固定金型３側から離れる。しかる後、押出板５が前進
し押出ビン６の作動によって、キャビティ、７中の成形
品と共に。In the above embodiment, after the injection molding is finished, the molten metal is cooled and solidified, and the mold is opened, the gas vent groove 1'
The waste metal that has solidified o and 11 in the bypass passage 19 of the valve chamber 12 leaves the fixed mold 3 while being attached to the movable mold 4 together with the injection product. Thereafter, the extrusion plate 5 moves forward and, by the operation of the extrusion bin 6, together with the molded product in the cavity 7.

可動金型４から前記廃棄金属を離型する。The waste metal is released from the movable mold 4.

この製品押出しが行なわれる時、ビン２２も同時に前進
し、ビン２２の作用で復帰杵２３が押され、その結果弾
性体１日の弾発力に抗して弁１３は前進し、開状態とな
り、且つ係止機構１５にて開状態が保持され次の動作の
待期状態となる。このとき、弁１３はボール等の係止機
構にて開状態を保持される故、押圧板５やビン２２が後
退しても弁１３は開状態を維持することとなる。When this product extrusion is carried out, the bottle 22 also moves forward at the same time, and the return punch 23 is pushed by the action of the bottle 22, and as a result, the valve 13 moves forward against the elastic force of the elastic body and becomes open. , and the open state is maintained by the locking mechanism 15 to enter the waiting state for the next operation. At this time, since the valve 13 is held open by a locking mechanism such as a ball, the valve 13 remains open even if the press plate 5 and the bottle 22 are moved back.

本実施例は以上のように構成されているため。This is because the present embodiment is configured as described above.

射出成形時においてガスは迂回通路１９から溝１１を介
してガス排出路４ｂを通って外方に排出され。During injection molding, gas is discharged outward from the detour passage 19 via the groove 11 and through the gas discharge passage 4b.

続いて進入してくる大きな質量を持った溶融金属は弁室
１２−の斜面に当って反射し、ガス抜き溝１１の軸線方
向とは異なる方向へ約９０度方向を替えて弁１３に激突
し、係止機構１５を外すことによシ弁を左方に後退させ
、溝１１と迂回路１９の開口端とをずらして迂回通路１
９の開口端を弁１３の周面でブロックするため、外部と
の通路は遮断され溶融金属自身の作用によって弁を閉じ
る。従って溶融金属は金型外へ排出されることがない。Subsequently, the incoming molten metal with a large mass is reflected by the slope of the valve chamber 12-, changes direction by about 90 degrees in a direction different from the axial direction of the gas vent groove 11, and crashes into the valve 13. , by removing the locking mechanism 15, the valve is moved back to the left, the groove 11 and the opening end of the detour path 19 are shifted, and the detour path 1 is removed.
Since the open end of the valve 9 is blocked by the peripheral surface of the valve 13, the passage to the outside is blocked and the valve is closed by the action of the molten metal itself. Therefore, molten metal is not discharged outside the mold.

以上の説明から明らかなように本発明によれば。As is clear from the above description, according to the present invention.

金型キャビティから導かれたガス抜き溝に、ガス抜き溝
の軸線方向とは異なる方向に弁を設け、ガス抜き溝から
弁の側面に迂回した迂回通路を設け。A valve is provided in the gas vent groove led from the mold cavity in a direction different from the axial direction of the gas vent groove, and a detour path is provided that detours from the gas vent groove to the side of the valve.

前記弁をキャピテイから進んできた被射出溶融物によっ
て外部に連絡される通路を遮断することができる構成と
されているため、金型キャピイ内のガスを確実に排出で
き、被射出溶融物の外部への排出を完全に阻止すること
ができる。すなわち。Since the valve is configured to be able to block the passage to the outside by the molten material to be injected that has advanced from the mold cavity, the gas in the mold cappy can be reliably discharged, and the molten material to be injected from the outside can be reliably discharged. emissions can be completely prevented. Namely.

射出成形時に効率良く大量のガスを抜き取り、製品中に
巣を形成することがなく、被射出溶融物が該弁１３位置
に達したときは、最初の溶融物により素早く且つ確実に
弁１３を閉じることができるものである。A large amount of gas is efficiently extracted during injection molding, no cavities are formed in the product, and when the molten material to be injected reaches the position of the valve 13, the valve 13 is quickly and reliably closed by the first molten material. It is something that can be done.

そして、成形後は、金型を開き成形品を取出す際に成形
品を押出す製品押出板５に付設したピン２２をもって弁
体の復帰杵２３を前進せしめるから、弁室１２内の凝固
金属は確実に排出されるだけでなく、弁１３を開状態に
自動的且つ確実にセットできる。上記実施例ｉ可動金型
４に取付けたガイドブロック１４に弁棒１３ａを設けた
場合で。After molding, when the mold is opened and the molded product is taken out, the pin 22 attached to the product extrusion plate 5 that extrudes the molded product is used to advance the return punch 23 of the valve body, so that the solidified metal in the valve chamber 12 is Not only can the gas be reliably discharged, but the valve 13 can be automatically and reliably set to the open state. In the above embodiment i, the guide block 14 attached to the movable mold 4 is provided with the valve rod 13a.

あるが、第４図に示す如く固定金型６に弁棒１ｉを設け
る場合もある。However, as shown in FIG. 4, the valve stem 1i may be provided in the fixed mold 6 in some cases.

この実施例では、内部を中空とした円柱状ｍ１３ａを用
い、弁となる先端１ろｄを可動金型４内に食い込む如く
位置させ、第４図乃至第６図に１２に至らしめる。迂回
通路１９の端部は弁棒１３ａの側方に至り、弁棒１３ａ
の周囲に設けた切欠部１３ｅを介して固定金型６に設け
たガス排出路６ｂに連通ずる。更に弁棒１３ａ後端に膨
大部を形成して復帰杵２３とし、筒体１６の後方にソレ
ノイド式シリンダー等のアクチュエータ２５を設ける。In this embodiment, a hollow cylindrical cylinder m13a is used, and the distal end 1d serving as a valve is positioned so as to bite into the movable mold 4, resulting in 12 in FIGS. 4 to 6. The end of the detour passage 19 reaches the side of the valve stem 13a, and the end of the bypass passage 19 reaches the side of the valve stem 13a.
It communicates with a gas exhaust path 6b provided in the fixed mold 6 via a notch 13e provided around the periphery of the mold. Further, an enlarged portion is formed at the rear end of the valve stem 13a to serve as a return punch 23, and an actuator 25 such as a solenoid type cylinder is provided at the rear of the cylinder 16.

該アクチュエータ２５に取付ける復帰ピン２２は筒体１
６を貫通し、復帰杵２３を押圧して弁棒１３ａを前進さ
せるものである。なお、該アクチュエータ２５は電磁作
動に限ることなく、油圧作動のものを用いることもあり
、該アクチュエータ２５と可動金型４内に設けられる製
品押出板５の作動シリンダとは電気的又は油圧的に結合
され、製品押出板５の作動と連動してアクチュエータ２
５に設けた復帰ビン２２も前進するものである。The return pin 22 attached to the actuator 25 is attached to the cylinder body 1.
6 and presses the return punch 23 to advance the valve rod 13a. Note that the actuator 25 is not limited to electromagnetic operation, but may be hydraulically operated, and the actuator 25 and the actuating cylinder of the product extrusion plate 5 provided in the movable mold 4 are electrically or hydraulically connected. The actuator 2 is connected to the actuator 2 in conjunction with the operation of the product pushing plate 5.
The return bin 22 provided at 5 also moves forward.

上記のような装置を利用すると、以下に記載するような
多くの効果が期待できる。By using the above-mentioned device, many effects such as those described below can be expected.

（１）質量の小さいガスがほぼ逃げたとき、ガスに続い
て進行して来た質量の大きい被射出溶融物の慣性力で、
弁を直接押すことにより、ガスの排出路を遮断するよう
にしたので、弁の作動が早く。(1) When the gas with small mass almost escapes, due to the inertial force of the injected melt with large mass that follows the gas,
By directly pressing the valve, the gas exhaust path is shut off, so the valve operates quickly.

かつ、確実であり、ガス抜きと：弁部からの被射出溶融
物の排出防止を確実容易に行える。特に。Moreover, it is reliable, and gas venting and prevention of discharge of the molten material to be injected from the valve part can be performed reliably and easily. especially.

被射出溶融物を斜面に激突させ、その反射によって弁に
作用させるようにしたので、弁の作動が早く、確実であ
る。そして、各回の鋳込動作に完全に同調して、自動的
にガス抜きが行われ、タイミングが狂うこともなく、ガ
ス抜き作動が前走する。Since the molten material to be injected collides with the slope and its reflection acts on the valve, the valve operates quickly and reliably. Then, degassing is performed automatically in perfect synchronization with each casting operation, and the degassing operation runs ahead without any timing errors.

（２）射出時にガス抜きを十分に行えるので、射出製品
中の残存ガスが大幅に減少し、射出製品の湯まわり、耐
圧、気密性が著しく向上する。(2) Since gas can be sufficiently vented during injection, residual gas in the injection product is significantly reduced, and the hot water performance, pressure resistance, and airtightness of the injection product are significantly improved.

（３）成形品押出板に付設した復帰ビン又は製品押出板
と連動するピンで弁体を前進せしめる場合は、製品の押
出と同時に開状態にセントできるだけではなく、確実か
つ安全に廃棄金属を排出することができる。従って、キ
ャピテイ外周のエヤペント部におけるパリの発生が減少
するので、パリを除かなくても良く、金型に傷をつける
ことがない。その結果自動化が容易になり、金型の詰合
も延びる。(3) When moving the valve body forward using a return bin attached to the molded product extrusion plate or a pin that interlocks with the product extrusion plate, not only can the valve body be opened to the open state at the same time as the product is extruded, but also waste metal can be ejected reliably and safely. can do. Therefore, the occurrence of burrs in the air vent portion on the outer periphery of the cavity is reduced, so that there is no need to remove the burrs, and the mold is not damaged. As a result, automation becomes easier and mold filling becomes longer.

（４）弾性体１８にて弁体１ろに対し、常に弁が後退す
る方向に力を加えつつ、開状態を保持する係止機構１５
を設けておけば、被射出溶融物の最初の衝撃で係止機構
を外して弁を閉じ弾性体１８にて弁の開状態を維持する
ことができるから、被射出溶融物が不連続に弁１３に到
達する場合でも。(4) A locking mechanism 15 that maintains the open state while constantly applying force to the valve body 1 in the direction in which the valve retreats using the elastic body 18
If this is provided, the first impact of the molten material to be injected can disengage the locking mechanism and close the valve, allowing the elastic body 18 to maintain the open state of the valve. Even if it reaches 13.

最初の被射出溶融物により確実に弁を閉じることができ
る。The valve can be reliably closed by the first injected melt.

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

第１図は本発明の１実施例を示す縦断側面図。 第２図は第１図中の■−■線断面図、第５図は第１図の
一部拡大断面図、第４図は本発明の他の実施例を示す図
、第５図、第６図は各々第４図中の■−■線断面図及び
Ｖ＋−Ｖｔ線断面を示す図にして。 第７図乃至第１１図は各種係止機構を示す図である。。 １・・・・−固定盤、２・・・・・可動盤、３・・・・
・固定金型。 ４・・・・・可動金型、５・・・・・製品押出板、６・
・・・・押出ピン、７・・・・・キャピテイ、８・・・
・・射出スリーブ。 ９・・・・・射出プランジャ、１０．１１・・・・・・
ガス抜き溝、１２・・・・・弁室、１６・・・・・弁、
１３ａ・・・・・弁棒。 １！１１）・・・・・弁座、１４・・・・・ガイドブロ
ック、１５・・・・・係止機構、１６・・・・・筒体、
１８・・・・・スプリング、１９・・・・・迂回通路、
２２・・・・・ビン、２３・・・・・・・復帰杵。 特許出願人　宇５部興産株式会社 第１図 第２図 手続補正書 昭和５６年客月ユ１日 特許庁長官　殿 １　事件の表示 特願昭５６−１００６３１号 ２、発明の名称 射出成形装置における金型用ガス抜き装置３、補正をす
る者 事件との関係　　特許出願人 郵便番号　７５５ 山口県宇部市西本町１丁目１２番３２号（０２０）　　
宇部興産株式会社 電話　０５（５８１）５５１１ ４、補正命令の日付 補正命令は力い。 ５、補正の対象 明細書の発明の詳細な説明の欄。 ６　補正の内容 （１）明細書の第７頁第１５行の「ともある。」と同頁
第１６行の「次に」の間に、下記のとおり加入する。 記 ［なお、弁１３の閉じる方向に力を作用させるものとし
て、引張りバネからなる弾性体１８を用いたが、これは
、比較的に小さな力を作用させておくシリンダやソレノ
イド装置を用いることができるし、あるいは、プーリに
巻掛けたロープの一端を弁体軸４５の後端４６部に取付
け、このローブの他端に重りを取付けた重力装置などを
用いることもできる。」 （２）明細書の第１４頁第１３行の「弾性体１８」と「
にて」との間に、　「などのような弁で３を閉じる方向
に力を作用させる部材−１を加入する。 （３）明細書の第１４頁第１６行の「弾性体１８」と同
頁第１７行の「にて」の間に、「等」をカロ入する。 以　　上FIG. 1 is a longitudinal sectional side view showing one embodiment of the present invention. 2 is a sectional view taken along the line ■-■ in FIG. 1, FIG. 5 is a partially enlarged sectional view of FIG. 1, FIG. 4 is a diagram showing another embodiment of the present invention, FIG. 6 is a cross-sectional view taken along the line ■--■ and a cross-sectional view taken along the V+-Vt line in FIG. 4, respectively. FIGS. 7 to 11 are diagrams showing various locking mechanisms. . 1...Fixed plate, 2...Movable plate, 3...
・Fixed mold. 4...Movable mold, 5...Product extrusion plate, 6...
...Extrusion pin, 7... Capity, 8...
...Injection sleeve. 9...Injection plunger, 10.11...
Gas vent groove, 12...valve chamber, 16...valve,
13a...Valve stem. 1!11)... Valve seat, 14... Guide block, 15... Locking mechanism, 16... Cylindrical body,
18...Spring, 19...Detour passage,
22...Bin, 23...Return pestle. Patent Applicant: U5BE Kosan Co., Ltd. Figure 1 Figure 2 Procedural Amendments Date of 1980, 1980, Commissioner of the Japan Patent Office, 1. Indication of the case, Patent Application No. 1983-100631, 2. Name of the invention, Injection molding equipment. Mold degassing device 3, relationship with the case of the person making the amendment Patent applicant postal code 755 1-12-32 Nishihonmachi, Ube City, Yamaguchi Prefecture (020)
Ube Industries Co., Ltd. Phone: 05 (581) 5511 4. The order to correct the date of the correction order is powerful. 5. Detailed description of the invention in the specification to be amended. 6 Contents of the amendment (1) The following additions are made between "Tomoru." on page 7, line 15 of the specification and "next" on page 16, line 16. Note: Although the elastic body 18 made of a tension spring was used to apply force in the closing direction of the valve 13, it is also possible to use a cylinder or solenoid device that applies a relatively small force. Alternatively, it is also possible to use a gravity device in which one end of a rope wound around a pulley is attached to the rear end 46 of the valve body shaft 45 and a weight is attached to the other end of the rope. (2) “Elastic body 18” and “
A member 1 that applies a force in the direction of closing 3 with a valve such as ``is added between the ``elastic body 18'' and In the 17th line of the same page, insert "etc." between "te". that's all

Claims (2)

【特許請求の範囲】[Claims] （１）金型のキャビティから導かれたガス抜き溝部で、
かつ、互いに相対した凹凸部を有する金型の分離面部に
、キャピテイから進んで来る被射出溶融物の作用によっ
てガス抜き溝のｌ１ｌＩ＃方向とは異なる方向に直接動
かされる弁と、ガス抜き溝から弁の移動路の側面に通じ
たガス排出用の通路を設け、弁の開閉作動によりこの通
路と金型外部間のガス排出路の連通遮断を行いうるよう
にし、かつ、閉じている弁を開の状態にする弁開き装置
を備えた射出成形装置における金型用ガス抜き装置。(1) In the gas vent groove led from the mold cavity,
Further, on the separation surface of the mold having uneven parts facing each other, there is provided a valve that is directly moved in a direction different from the l1lI# direction of the gas venting groove by the action of the injected melt advancing from the cavity, and a valve that is moved directly from the gas venting groove in a direction different from the l1lI# direction of the gas venting groove. A gas exhaust passage leading to the side of the valve movement path is provided so that communication between this passage and the outside of the mold can be cut off by opening and closing the valve. A gas venting device for a mold in an injection molding machine equipped with a valve opening device that brings the valve into the state of （２）閉じている弁を開の状態にする弁開き装置として
、製品押出板に取付けたビンを用い、製品押出動作と同
時に弁を開きうるようにした特許請求の範囲第１項記載
の射出成形装置における金型用ガス抜き装置。(2) The injection system according to claim 1, in which a bottle attached to the product extrusion plate is used as the valve opening device to open the closed valve, and the valve can be opened simultaneously with the product extrusion operation. Gas venting device for molds in molding equipment.