JPH0155977B2 - - Google Patents
Info
- Publication number
- JPH0155977B2 JPH0155977B2 JP17159384A JP17159384A JPH0155977B2 JP H0155977 B2 JPH0155977 B2 JP H0155977B2 JP 17159384 A JP17159384 A JP 17159384A JP 17159384 A JP17159384 A JP 17159384A JP H0155977 B2 JPH0155977 B2 JP H0155977B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- gas
- air
- compressed air
- passage
- 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
Links
- 238000007872 degassing Methods 0.000 claims description 5
- 239000007789 gas Substances 0.000 description 39
- 239000000463 material Substances 0.000 description 7
- 238000013022 venting Methods 0.000 description 6
- 238000010137 moulding (plastic) Methods 0.000 description 3
- 238000001746 injection moulding Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/10—Moulds or cores; Details thereof or accessories therefor with incorporated venting means
-
- 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
- B29C45/26—Moulds
- B29C45/34—Moulds having venting means
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
「産業上の利用分野」
本発明は、プラスチツクモールド成形におい
て、金型内に生じたガスを強制的に金型外に排除
するガス抜き装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a gas venting device for forcibly expelling gas generated within a mold to the outside of the mold during plastic molding.
「従来の技術」
プラスチツクモールド成形において、プラスチ
ツク材料の乾操不十分或いは何等かの原因でプラ
スチツク材料に混合している不純物を含んだまま
プラスチツク材料を金型内に射出機より射出し、
金型を閉じる直前から金型を閉じて成形する状態
で、型内の空気及び型内のプラスチツクより発生
したガスのために成形品を型より取出す時、ガス
の膨脹力にて完成品が変形したり、気泡のため空
洞を生じたりする欠点がある。この欠点を除くた
めに、金型に広いガス抜き通路をつくると鋳ばり
ができる。また、狭いガス抜き通路では溶けたプ
ラスチツクが通路をふさいでしまい、定期的に閉
鎖箇所からプラスチツクを取除いて掃除しなけれ
ばならない。``Prior art'' In plastic molding, the plastic material is injected into the mold by an injection machine while containing impurities that have been mixed into the plastic material due to insufficient drying of the plastic material or for some other reason.
Immediately before the mold is closed, the mold is closed and molded, and when the molded product is removed from the mold due to the air inside the mold and the gas generated from the plastic inside the mold, the finished product becomes deformed due to the expansion force of the gas. However, there are drawbacks such as the formation of cavities due to air bubbles. To eliminate this drawback, creating a wide gas venting passage in the mold will result in flash. Also, in narrow vent passageways, melted plastic can block the passageway and must be periodically removed and cleaned from the closed area.
「発明が解決しようとする問題点」
本発明は、金型内に発生したガスを、狭いガス
抜き通路でもプラスチツクにより目詰りを起さず
ガスを外部に排出するガス抜き装置を提供するこ
とを目的とするものである。"Problems to be Solved by the Invention" The present invention aims to provide a gas venting device that discharges gas generated in a mold to the outside without causing clogging with plastic even in a narrow gas venting passage. This is the purpose.
「問題点を解決するための手段」
本発明は、前記の目的を解決するために、基部
に空気入口を設け先端部に空気噴出口を設けた圧
縮空気通路と、この圧縮空気通路を開閉する手動
又は自動的に作動される空気弁と、金型のガス排
出通路とガス案内管にて接続され空気噴出口の前
端部に開口されたガス排出口と、空気噴出口より
噴出する圧縮空気にてガス排出口より強制的に吸
引された金型内のガスを放出するガス放出口とを
備えた装置である。"Means for Solving Problems" In order to solve the above-mentioned object, the present invention provides a compressed air passage having an air inlet at the base and an air outlet at the tip, and a compressed air passage that opens and closes the compressed air passage. An air valve that is operated manually or automatically, a gas exhaust port that is connected to the gas exhaust passage of the mold by a gas guide pipe and opened at the front end of the air jet port, and compressed air that is jetted from the air jet port. This device is equipped with a gas discharge port that discharges the gas in the mold that has been forcibly sucked through the gas discharge port.
「作 用」
本発明は、前記の如く構成したことにより、金
型に狭いガス抜き通路を設け、金型を閉じる数秒
前より射出成形機ノズルより金型内にプラスチツ
ク素材を射出し冷却する間空気弁を作動して圧縮
空気通路を開き、空気噴出口より圧縮空気を噴出
して金型内のガスをガス抜き通路より吸引して金
型内のガスを強制的に排出し、金型内のガスが排
出され金型が冷却された時空気弁を前記と反対に
作動して空気通路を閉じるから、金型内のガス抜
き作業を迅速確実に行うとともに金型の開閉を容
易に行うことができる。"Function" By having the above-described structure, the present invention provides a narrow gas vent passage in the mold, and injects the plastic material into the mold from the injection molding machine nozzle several seconds before the mold is closed, during which time the plastic material is cooled. Operate the air valve to open the compressed air passage, blow out compressed air from the air jet port, suck the gas inside the mold through the gas vent passage, and forcibly exhaust the gas inside the mold. When the gas is exhausted and the mold is cooled, the air valve is operated in the opposite direction to close the air passage, so that the gas inside the mold can be quickly and reliably vented, and the mold can be opened and closed easily. Can be done.
「実施例」
Ａは取付ボルト穴１６，１７を備えたガス抜き
主体、１及び２は、ガス抜き主体Ａに設けた空気
入口及び圧縮空気噴出ノズルであり、圧縮空気入
口１にはコンプレツサー（図示せず）より圧縮空
気を送入する導管が接続される。３は、空気入口
及び空気噴出ノズル２を接続した圧縮空気通路、
５は空気弁であつて、圧縮空気通路３と交叉して
ガス抜き主体Ａにあけた案内穴１１に往復できる
ようにはめ込んだ空気弁であつて、空気弁５の中
間に空気穴５ａをあけてある。４は空気弁５の基
端段部５ｂを一方に弾圧するスプリングであつ
て、空気弁５をその復動方向に作動するようにガ
ス抜き主体Ａにあけたスプリング室１２に収容さ
れ止ねじ１３にて封止されている。６は金型、７
は金型６内に射出ノズルにて射出装填されたプラ
スチツクＰの流れ込まないように形成されたすき
間７ａを存して金型６に設けたガス排出路であつ
て、ガス排出路７の開口部にガス案内管８の一端
を接続した接続管１５を固定部材１４にて金型６
に固定する。９は空気噴出ノズル２の前端部に開
口してガス抜き主体Ａに設けたガス排出口であ
り、ガス排出口９にガス案内管８の他端を接続し
たガス排出管１５′を接続開口している。"Example" A is a degassing main body equipped with mounting bolt holes 16 and 17, 1 and 2 are an air inlet and a compressed air jetting nozzle provided in the degassing main body A, and the compressed air inlet 1 is equipped with a compressor (Fig. (not shown) is connected to a conduit for supplying compressed air. 3 is a compressed air passage connecting the air inlet and the air jet nozzle 2;
Reference numeral 5 denotes an air valve, which is fitted so as to reciprocate in a guide hole 11 made in the degassing main body A, intersecting with the compressed air passage 3, and an air hole 5a is made in the middle of the air valve 5. There is. Reference numeral 4 denotes a spring that presses the proximal step portion 5b of the air valve 5 in one direction, and is housed in a spring chamber 12 formed in the gas venting main body A so as to operate the air valve 5 in the reverse direction. It is sealed in. 6 is the mold, 7
is a gas discharge passage provided in the mold 6 with a gap 7a formed to prevent the plastic P injected and loaded into the mold 6 from flowing into the mold 6, and the opening of the gas discharge passage 7 Connecting pipe 15 to which one end of gas guide pipe 8 is connected is fixed to mold 6 using fixing member 14.
Fixed to. Reference numeral 9 denotes a gas exhaust port that opens at the front end of the air jet nozzle 2 and is provided in the degassing main body A, and a gas exhaust pipe 15' connected to the other end of the gas guide pipe 8 is connected to the gas exhaust port 9. ing.
前記実施例では、空気弁５は、スプリング４の
弾力に抗して押し作動してその空気通穴５ａを圧
縮空気通路３に連通させるように構成されている
が、空気弁５に一方向開口部を設け空気弁５を回
動して一方向開口部にて圧縮空気通路３を開閉す
ることができる。また空気弁５を電磁装置等によ
り遠隔操作すると共に金型の開閉と機械的電気的
に連動させるように構成することができる。 In the embodiment described above, the air valve 5 is configured to push against the elasticity of the spring 4 to communicate the air hole 5a with the compressed air passage 3, but the air valve 5 has a one-way opening. The compressed air passage 3 can be opened and closed by providing a one-way opening by rotating the air valve 5. Further, the air valve 5 can be remotely operated by an electromagnetic device or the like and can be configured to be mechanically and electrically linked with the opening and closing of the mold.
本発明は、型６を閉じる直前に空気弁５を往動
し空気通穴５ａにて圧縮空気入口１と圧縮空気噴
出ノズル２を連通してコンプレツサー（図示せ
ず）の圧縮空気を圧縮噴出ノズル２より噴射し、
金型６内の空気を吸引し金型６を閉じて射出成形
機（図示せず）のノズルより金型６内にプラスチ
ツク材料を射出しながら引続いて圧縮空気噴出ノ
ズル２より圧縮空気を噴出し続ける。従つて金型
６のガス排出路７内の気圧は低くなりプラスチツ
ク材料に含まれるガスも抜き取られる。金型６が
冷却してプラスチツクが型内で固まつた時、空気
弁５を復動して空気通穴５ａを圧縮空気通路３よ
り離してコンプレツサーの圧縮空気が圧縮空気噴
出ノズル２より噴射されるのを止め、金型６内の
圧力を常圧に戻し、金型を開いてプラスチツク成
形品を金型より取出す。 In the present invention, just before closing the mold 6, the air valve 5 is reciprocated to communicate the compressed air inlet 1 and the compressed air jetting nozzle 2 through the air passage hole 5a, so that the compressed air from a compressor (not shown) is transferred to the compressed air jetting nozzle. Inject from 2,
The air in the mold 6 is sucked, the mold 6 is closed, and the plastic material is injected into the mold 6 from the nozzle of an injection molding machine (not shown), while compressed air is subsequently jetted from the compressed air jet nozzle 2. Continue to do so. Therefore, the air pressure in the gas discharge passage 7 of the mold 6 is lowered, and the gas contained in the plastic material is also removed. When the mold 6 cools down and the plastic hardens within the mold, the air valve 5 is moved back to separate the air hole 5a from the compressed air passage 3, and compressed air from the compressor is injected from the compressed air jet nozzle 2. The pressure inside the mold 6 is returned to normal pressure, the mold is opened, and the plastic molded product is taken out from the mold.
「発明の効果」
本発明は、前記した如く、圧縮空気通路３を空
気弁５にて開閉し空気噴出口２より圧縮空気を噴
出して金型６内のすき間７ａより金型６内のガス
を強制的に吸引し、圧縮空気とガスとを混合して
ガス排出口９より放出することができる。従つて
金型６内に生じたガスはプラスチツク成形物中に
混在せず、鋳ばり及び目詰りを生ぜず、成形品の
品質向上を図ることができ、きかも機構簡単でプ
ラスチツク成形界に貢献することが頗る大であ
る。"Effects of the Invention" As described above, the present invention opens and closes the compressed air passage 3 with the air valve 5, blows out compressed air from the air outlet 2, and gases the inside of the mold 6 through the gap 7a inside the mold 6. The compressed air and gas can be mixed and discharged from the gas outlet 9. Therefore, the gas generated in the mold 6 does not mix into the plastic molded product, and does not cause flash or clogging, improving the quality of the molded product, and contributing to the plastic molding industry with a simple mechanism. It is extremely important to do so.
図面は、本発明の実施例を示す。第１図は全体
の配置図、第２図は第１図A′−A′線の断面図で
ある。
１：空気入口、２：空気噴出口、３：圧縮空気
通路、５：空気弁、６：金型、７：ガス排出路、
８：ガス案内管、９：ガス排出口、１０：ガス放
出口、Ａ：ガス抜き主体。
The drawings illustrate embodiments of the invention. FIG. 1 is an overall layout diagram, and FIG. 2 is a sectional view taken along line A'-A' in FIG. 1: Air inlet, 2: Air outlet, 3: Compressed air passage, 5: Air valve, 6: Mold, 7: Gas discharge passage,
8: Gas guide pipe, 9: Gas discharge port, 10: Gas discharge port, A: Gas venting main body.
Claims (1)
２を設けた圧縮空気通路３と、圧縮空気通路３を
開閉する空気弁５と、金型６のガス排出路７とガ
ス案内管８にて接続され空気噴出口２の前端部に
開口されたガス排出口９と、空気噴出口２より噴
出する圧縮空気にてガス排出口９より強制的に吸
引された金型６内のガスを放出するガス放出口１
０とを備えたことを特徴とする金型のガス抜き装
置。1 A compressed air passage 3 having an air inlet 1 at the base and an air outlet 2 at the tip, an air valve 5 for opening and closing the compressed air passage 3, a gas discharge passage 7 of the mold 6 and a gas guide pipe 8. The gas in the mold 6 that is forcibly sucked through the gas outlet 9 is released by the compressed air that is ejected from the air outlet 2 and the gas outlet 9 that is connected to the air outlet 9 and opened at the front end of the air outlet 2. gas discharge port 1
A mold degassing device characterized by comprising: 0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17159384A JPS6149819A (en) | 1984-08-20 | 1984-08-20 | Vent device of mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17159384A JPS6149819A (en) | 1984-08-20 | 1984-08-20 | Vent device of mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6149819A JPS6149819A (en) | 1986-03-11 |
| JPH0155977B2 true JPH0155977B2 (en) | 1989-11-28 |
Family
ID=15926033
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17159384A Granted JPS6149819A (en) | 1984-08-20 | 1984-08-20 | Vent device of mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6149819A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03202333A (en) * | 1989-02-28 | 1991-09-04 | Citizen Watch Co Ltd | Injection molding device |
| CA2075462C (en) * | 1992-01-27 | 1999-05-04 | George Erdos | Bump structure and method for bonding to a semi-conductor device |
| ITMI20060055A1 (en) | 2006-01-16 | 2007-07-17 | Persico Spa | MOLD WITH VENT COMMANDED FOR ROTATIONAL MOLDING |
-
1984
- 1984-08-20 JP JP17159384A patent/JPS6149819A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6149819A (en) | 1986-03-11 |
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