JPH06170895A - Injectin molding mold - Google Patents
Injectin molding moldInfo
- Publication number
- JPH06170895A JPH06170895A JP32582492A JP32582492A JPH06170895A JP H06170895 A JPH06170895 A JP H06170895A JP 32582492 A JP32582492 A JP 32582492A JP 32582492 A JP32582492 A JP 32582492A JP H06170895 A JPH06170895 A JP H06170895A
- Authority
- JP
- Japan
- Prior art keywords
- gate
- mold
- movable rod
- bush
- mold 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.)
- Granted
Links
- 238000000465 moulding Methods 0.000 title description 2
- 238000001746 injection moulding Methods 0.000 claims abstract description 12
- 239000011347 resin Substances 0.000 claims description 12
- 229920005989 resin Polymers 0.000 claims description 12
- 238000005219 brazing Methods 0.000 abstract description 4
- 238000009792 diffusion process Methods 0.000 abstract description 4
- 238000005299 abrasion Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 3
- 229910000997 High-speed steel Inorganic materials 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000007774 longterm Effects 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
- 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
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/2701—Details not specific to hot or cold runner channels
- B29C45/2708—Gates
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、可動ロッドの先端でゲ
ートを開閉するバルブゲート方式の射出成形金型に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve gate type injection molding die for opening and closing a gate at the tip of a movable rod.
【０００２】[0002]
【従来の技術】この種のバルブゲート方式の射出成形金
型としては、例えば、図２に示すようなものが知られて
いる。この射出成形金型について説明すると、図２にお
いて符号１は固定型板であり、この固定型板１に対して
可動型板２が接近、離間自在に設けられていると共に、
これらの型板１，２間には、成形品形状をなすキャビテ
ィ３が形成されている。そして、上記固定型板１の内部
には、バルブブッシュ４が装着されており、このバルブ
ブッシュ４の外周にはコイル状ヒータ５が設けられてい
る。また、コイル状ヒータ５の外周にはヒータカバー６
及び筒状部材７が装着されている。さらに、上記バルブ
ブッシュ４の先端には先端部材８が螺着されており、こ
の先端部材８，バルブブッシュ４，ヒータカバー６及び
筒状部材７に対向して、固定型板１には、ハイスなどの
硬質材料からなるゲートブッシュ９が装着されている。
このゲートブッシュ９は、先端にいくほど縮径する漏斗
状に形成されており、このゲートブッシュ９の先端部が
固定型板１の彫刻面からキャビティ３内に突設されてい
ると共に、上記ゲートブッシュ９の先端内部がゲート９
ａとされている。そして、上記バルブブッシュ４と先端
部材８との間には、ガイド部材１０が内装されており、
このガイド部材１０は、バルブブッシュ４に装着された
外筒１０ａと、ハイスなどの硬質材料からなる可動ロッ
ド１１を案内支持する内筒１０ｂと、これらの内外筒１
０ｂ，１０ａ間を連結する複数の支持板部１０ｃとから
構成されている。そして、上記のように構成された射出
成形金型にあっては、型締状態において、可動ロッド１
１を摺動させることにより、ゲート９ａを開いて、溶融
樹脂を、バルブブッシュ４の内部，ガイド部材１０の内
外筒１０ｂ，１０ａ間，先端部材８の内部及びゲートブ
ッシュ９の先端内部（ゲート）９ａを通って、キャビテ
ィ３に供給し、次いで、可動ロッド１１を摺動させて、
上記ゲート９ａを閉じると共に、上記キャビティ３内の
樹脂を冷却、固化させた後、固定型板１と可動型板２と
の間を開いて、キャビティ３内の成形品を離型させるよ
うになっている。2. Description of the Related Art A valve gate type injection molding die of this type is known, for example, as shown in FIG. This injection molding die will be described. In FIG. 2, reference numeral 1 is a fixed mold plate, and a movable mold plate 2 is provided so as to be movable toward and away from the fixed mold plate 1.
A cavity 3 having a shape of a molded product is formed between the mold plates 1 and 2. A valve bush 4 is mounted inside the fixed mold plate 1, and a coiled heater 5 is provided on the outer circumference of the valve bush 4. Further, the heater cover 6 is provided on the outer periphery of the coil heater 5.
Also, the tubular member 7 is attached. Further, a tip end member 8 is screwed onto the tip end of the valve bush 4, and the fixed mold plate 1 is provided with a high speed steel member facing the tip end member 8, the valve bush 4, the heater cover 6 and the tubular member 7. A gate bush 9 made of a hard material such as is attached.
The gate bush 9 is formed in a funnel shape whose diameter decreases toward the tip, and the tip of the gate bush 9 is projected from the engraved surface of the fixed template 1 into the cavity 3 and the gate bush 9 is formed. The inside of the tip of the bush 9 is the gate 9
It is a. A guide member 10 is internally provided between the valve bush 4 and the tip member 8,
The guide member 10 includes an outer cylinder 10a attached to the valve bush 4, an inner cylinder 10b that guides and supports a movable rod 11 made of a hard material such as HSS, and inner and outer cylinders 1 of these.
It is composed of a plurality of support plate portions 10c connecting between 0b and 10a. Then, in the injection molding die configured as described above, in the mold clamping state, the movable rod 1
1 is slid to open the gate 9a, so that the molten resin is filled inside the valve bush 4, between the inner and outer cylinders 10b and 10a of the guide member 10, the inside of the tip member 8 and the inside of the tip of the gate bush 9 (gate). 9a, supply to the cavity 3, then slide the movable rod 11,
After the gate 9a is closed and the resin in the cavity 3 is cooled and solidified, the fixed mold plate 1 and the movable mold plate 2 are opened to release the molded product in the cavity 3. ing.
【０００３】[0003]
【発明が解決しようとする課題】ところで、上記従来の
射出成形金型においては、上記ゲートブッシュ９が、固
定型板１に形成された装着孔１ａに装着されて、可動型
板２側に押圧されているだけであるから、ゲートブッシ
ュ９を強固に可動型板２に固定しておくことが難しく、
長期にわたって繰り返し成形を行うと、ゲートブッシュ
９の位置がずれ易い。その結果、ゲートブッシュ９のゲ
ート９ａの中心と可動ロッド１１の軸心を一致させてお
くことが難しいという問題がある。そして、上記ゲート
ブッシュ９のゲート９ａの中心と可動ロッド１１の軸心
との間にずれが生じると、可動ロッド１１によってゲー
ト９ａを開閉する際に、ゲートブッシュ９と可動ロッド
１１とが接触干渉するという問題が生じる。By the way, in the above-mentioned conventional injection molding die, the gate bush 9 is mounted in the mounting hole 1a formed in the fixed mold plate 1 and is pressed to the movable mold plate 2 side. Therefore, it is difficult to firmly fix the gate bush 9 to the movable mold plate 2,
If molding is repeated over a long period of time, the position of the gate bush 9 tends to shift. As a result, there is a problem that it is difficult to keep the center of the gate 9a of the gate bush 9 and the axis of the movable rod 11 aligned. When the center of the gate 9a of the gate bush 9 and the axis of the movable rod 11 are deviated from each other, when the movable rod 11 opens and closes the gate 9a, the gate bush 9 and the movable rod 11 interfere with each other. The problem arises.
【０００４】本発明は、上記事情に鑑みてなされたもの
で、その目的とするところは、ゲートを有するゲート型
を確実に型板に固定することができて、ゲートの位置を
長期にわたって安定して保持することができると共に、
ゲートとこのゲートを開閉する可動ロッドとの接触干渉
を防ぐことができる射出成形金型を提供することにあ
る。The present invention has been made in view of the above circumstances, and an object thereof is to reliably fix a gate mold having a gate to a template so that the position of the gate is stable for a long period of time. Can be held and
An object of the present invention is to provide an injection mold that can prevent contact interference between a gate and a movable rod that opens and closes the gate.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
に、本発明は、一対の型板間にキャビティが形成され、
一方の型板内にゲートを経て上記キャビティに連通する
樹脂通路が設けられ、かつ上記樹脂通路を構成するバル
ブ体内に可動ロッドが軸方向に移動可能に配置され、こ
の可動ロッドの先端で上記ゲートを開閉する射出成形金
型において、上記型板に、上記ゲートを有しかつ上記型
板よりも耐摩耗性に優れたゲート型が装着され、上記ゲ
ート型と型板とが互いに接合されたものである。In order to achieve the above object, the present invention provides a cavity between a pair of mold plates,
A resin passage communicating with the cavity through a gate is provided in one of the template plates, and a movable rod is axially movably arranged in the valve body forming the resin passage, and the gate is provided at the tip of the movable rod. In an injection molding die for opening and closing, a gate die having the gate and having better wear resistance than the die plate is attached to the die plate, and the gate die and the die plate are joined to each other. Is.
【０００６】[0006]
【作用】本発明の射出成形金型にあっては、耐摩耗性に
優れたゲート型を型板に拡散（ロウ付け）接合すること
により、型板にゲート型を強固に取り付ける。In the injection molding die of the present invention, the gate die having excellent wear resistance is firmly joined to the die plate by diffusion (brazing) joining to the die plate.
【０００７】[0007]
【実施例】以下、図１に基づいて本発明の一実施例を説
明する。なお、本実施例において、図２に示す上記従来
例と同様の構成の部分については、同符号をつけて説明
を省略する。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. In the present embodiment, parts having the same configurations as those of the conventional example shown in FIG.
【０００８】本実施例においては、上記従来例のゲート
ブッシュ９の代わりに、固定型板１の装着孔１ａとバル
ブブッシュ４，ヒータカバー６及び筒状部材７との間に
装着された装着筒２０と、ゲート２１ａを有し、かつ上
記固定型板１に装着されたゲート型２１とを設けたもの
である。そして、このゲート型２１はハイスなどの硬質
材料からなり、かつ上記固定型板１に拡散（ロウ付け）
接合によって固着されている。In the present embodiment, instead of the gate bush 9 of the conventional example, a mounting cylinder mounted between the mounting hole 1a of the fixed mold plate 1 and the valve bush 4, the heater cover 6 and the tubular member 7. 20 and a gate mold 21 having a gate 21a and mounted on the fixed mold plate 1 are provided. The gate mold 21 is made of a hard material such as high speed steel, and is diffused (brazed) on the fixed mold plate 1.
It is fixed by joining.
【０００９】上記のように構成された射出成形金型にあ
っては、従来同様、型締状態において、可動ロッド１１
を移動させ、ゲート２１ａを開くことにより、キャビテ
ィ３内に樹脂を注入する。次いで、上記可動ロッド１１
を移動させて、ゲート２１ａを閉塞する。そして、キャ
ビティ３内の樹脂が冷却、固化した後、固定型板１と可
動型板２との間を開いて、内部の成形品を離型させる。
この場合、ゲート２１ａを有するゲート型２１が固定型
板１に拡散（ロウ付け）接合されているから、長期間使
用しても、ゲート２１ａと可動ロッド１１の位置関係が
ずれることがなく、ゲート型２１に可動ロッド１１が接
触干渉することを防止することができて、ゲート型２１
並びに可動ロッド１１の摩耗を防ぐことができ、従っ
て、成形品のゲート跡にバリが生じることがない。しか
も、ゲート型２１と先端部材８との間に形成された所定
の間隙を長期間にわたって保持することができるから、
この間隙の空気による断熱効果を確実に発揮できて、バ
ルブブッシュ４内の溶融樹脂を所望の温度に保つことが
できると共に、ゲート２１ａからキャビティ３内に注入
された樹脂を迅速にかつ円滑に冷却することができる。
また、固定型板１の彫刻面とゲート型２１の先端面との
間（境界部）においては、両者が拡散（ロウ付け）接合
により固着されているから、上記境界部が目立つことな
く、従って、成形品の外観性が改善される。In the injection-molding die having the above-mentioned structure, the movable rod 11 is in the clamped state as in the conventional case.
Is moved and the gate 21a is opened to inject the resin into the cavity 3. Then, the movable rod 11
Are moved to close the gate 21a. Then, after the resin in the cavity 3 is cooled and solidified, the space between the fixed mold plate 1 and the movable mold plate 2 is opened, and the molded product inside is released.
In this case, since the gate mold 21 having the gate 21a is diffusion (brazing) bonded to the fixed mold plate 1, the positional relationship between the gate 21a and the movable rod 11 does not shift even after long-term use, and the gate 21a It is possible to prevent the movable rod 11 from contacting and interfering with the mold 21.
In addition, wear of the movable rod 11 can be prevented, and thus burrs do not occur on the gate mark of the molded product. Moreover, since the predetermined gap formed between the gate mold 21 and the tip member 8 can be maintained for a long period of time,
The heat insulating effect of the air in this gap can be reliably exhibited, the molten resin in the valve bush 4 can be maintained at a desired temperature, and the resin injected from the gate 21a into the cavity 3 can be cooled quickly and smoothly. can do.
Further, between the engraved surface of the fixed die plate 1 and the tip end surface of the gate die 21 (boundary portion), since both are fixed by diffusion (brazing) bonding, the above-mentioned boundary portion is not conspicuous and therefore , The appearance of the molded product is improved.
【００１０】[0010]
【発明の効果】以上説明したように、本発明は、一対の
型板間にキャビティが形成され、一方の型板内にゲート
を経て上記キャビティに連通する樹脂通路が設けられ、
かつ上記樹脂通路を構成するバルブ体内に可動ロッドが
軸方向に移動可能に配置され、この可動ロッドの先端で
上記ゲートを開閉する射出成形金型において、上記型板
に、上記ゲートを有しかつ上記型板よりも耐摩耗性に優
れたゲート型が装着され、上記ゲート型と型板とが互い
に接合されたものであるから、耐摩耗性に優れたゲート
型を型板に拡散（ロウ付け）接合することにより、ゲー
トを有するゲート型を確実に型板に固定することができ
て、ゲートの位置を長期にわたって安定して保持するこ
とができると共に、ゲートとこのゲートを開閉する可動
ロッドとの接触干渉を防ぐことができて、ゲート並びに
可動ロッドの摩耗を防止することができ、従って、外観
性の良好な成形品を容易に成形することができる。As described above, according to the present invention, a cavity is formed between a pair of mold plates, and a resin passage communicating with the cavity through a gate is provided in one mold plate.
Further, in an injection molding die in which a movable rod is axially movable in a valve body constituting the resin passage, and the tip of the movable rod opens and closes the gate, the mold plate has the gate. Since the gate mold, which has better wear resistance than the template, is mounted and the gate mold and the template are joined to each other, the gate mold having excellent wear resistance is diffused (brazed) to the template. ) By joining, the gate mold having the gate can be securely fixed to the template, the position of the gate can be stably held for a long period of time, and the gate and the movable rod for opening and closing the gate It is possible to prevent contact interference between the two and prevent wear of the gate and the movable rod. Therefore, it is possible to easily form a molded product having good appearance.
【図１】本発明の一実施例を示す断面図である。FIG. 1 is a sectional view showing an embodiment of the present invention.
【図２】従来の射出成形金型の断面図である。FIG. 2 is a sectional view of a conventional injection mold.
１ 固定型板 ２ 可動型板 ３ キャビティ ４ バルブブッシュ（バルブ体） ８ 先端部材（バルブ体） １１ 可動ロッド ２１ ゲート型 ２１ａ ゲート DESCRIPTION OF SYMBOLS 1 Fixed mold plate 2 Movable mold plate 3 Cavity 4 Valve bush (valve body) 8 Tip member (valve body) 11 Movable rod 21 Gate type 21a Gate
Claims (1)
一方の型板内にゲートを経て上記キャビティに連通する
樹脂通路が設けられ、かつ上記樹脂通路を構成するバル
ブ体内に可動ロッドが軸方向に移動可能に配置され、こ
の可動ロッドの先端で上記ゲートを開閉する射出成形金
型において、上記型板に、上記ゲートを有しかつ上記型
板よりも耐摩耗性に優れたゲート型が装着され、上記ゲ
ート型と型板とが互いに接合されたことを特徴とする射
出成形金型。1. A cavity is formed between a pair of mold plates,
A resin passage communicating with the cavity through a gate is provided in one of the template plates, and a movable rod is axially movably arranged in the valve body forming the resin passage, and the gate is provided at the tip of the movable rod. In an injection molding die for opening and closing, a gate mold having the gate and having better wear resistance than the mold plate is attached to the mold plate, and the gate mold and the mold plate are joined to each other. An injection molding die characterized by.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04325824A JP3132204B2 (en) | 1992-12-04 | 1992-12-04 | Injection mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04325824A JP3132204B2 (en) | 1992-12-04 | 1992-12-04 | Injection mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06170895A true JPH06170895A (en) | 1994-06-21 |
| JP3132204B2 JP3132204B2 (en) | 2001-02-05 |
Family
ID=18181015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04325824A Expired - Fee Related JP3132204B2 (en) | 1992-12-04 | 1992-12-04 | Injection mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3132204B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014520007A (en) * | 2011-06-09 | 2014-08-21 | ハスキー インジェクション モールディング システムズ リミテッド | Wear resistant assembly for contact components of mold systems |
-
1992
- 1992-12-04 JP JP04325824A patent/JP3132204B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014520007A (en) * | 2011-06-09 | 2014-08-21 | ハスキー インジェクション モールディング システムズ リミテッド | Wear resistant assembly for contact components of mold systems |
| US9289930B2 (en) | 2011-06-09 | 2016-03-22 | Husky Injection Molding Systems Ltd. | Wear resistant assembly for contacting components of mold-tool system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3132204B2 (en) | 2001-02-05 |
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