JPS58138626A - Metallic mold for injection molding - Google Patents
Metallic mold for injection moldingInfo
- Publication number
- JPS58138626A JPS58138626A JP2310482A JP2310482A JPS58138626A JP S58138626 A JPS58138626 A JP S58138626A JP 2310482 A JP2310482 A JP 2310482A JP 2310482 A JP2310482 A JP 2310482A JP S58138626 A JPS58138626 A JP S58138626A
- Authority
- JP
- Japan
- Prior art keywords
- runner
- resin
- cavity
- volume
- injection molding
- 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
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
- B29C45/02—Transfer moulding, i.e. transferring the required volume of moulding material by a plunger from a "shot" cavity into a mould cavity
-
- 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
- B29C45/02—Transfer moulding, i.e. transferring the required volume of moulding material by a plunger from a "shot" cavity into a mould cavity
- B29C2045/024—Transfer plungers and pots with an oblong cross section
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は容積が可変するランナを備えた射出成形用金型
に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an injection mold with a runner of variable volume.
従来、この種の引出成形用金型を用いて、成形品を成形
するには第１図に示すように注入口（１）から注入した
便脂がランナ（２）およびゲート（３）を経て、上型（
４）と下型（５）に形成したキャビティ１６１に充填さ
れることＫより行なわれている。しかるに樹脂がキャビ
ティ１６１に充填さｈた状態においてはランナ（２）お
よびゲート（３１にも樹脂が残っておプ、このうち再生
不可能な樹脂については廃棄することが多く、樹脂の利
用効率を著しく低下させていた。そこでこの樹脂の利用
効率を向上させる手法として、成形金型に形成するラン
ナの容！を小きくすることが考えらｈるが、ランチの容
積を小きくするとランナ内に樹脂が詰まり、キャビティ
内に樹脂が十分充填されないことがあるので不良の成形
品が成形される原因となり、したがって単に小さい容積
回置するランナを設けることができないという欠点があ
った。また成形方法自体に工数が嵩みコスト高になると
も）う欠点があった。 ５本発明はこのような事情、
に鑑みなされたもので、ランナの容積をキャビティの容
積と略々間等に形成すると共に、このランナの容積を可
変可能にするというきわめて簡単な構成によ）、樹脂利
用効率を高める射出成形用金型を提供するものでやる。Conventionally, when molding a molded product using this type of pultrusion mold, stool fat injected from an injection port (1) passes through a runner (2) and a gate (3) as shown in Figure 1. , upper mold (
4) and filling the cavity 161 formed in the lower mold (5). However, when the cavity 161 is filled with resin, some resin remains in the runner (2) and the gate (31), and resin that cannot be recycled is often discarded, reducing the efficiency of resin usage. Therefore, as a method to improve the utilization efficiency of this resin, it is considered to reduce the volume of the runner formed in the molding die. The resin may become clogged and the resin may not be sufficiently filled into the cavity, causing a defective molded product to be molded.Therefore, there was a drawback in that it was not possible to simply provide a runner for rotating a small volume.Furthermore, the molding method itself However, there were drawbacks such as increased man-hours and high costs. 5 The present invention addresses these circumstances,
It was developed in consideration of the above, and has an extremely simple configuration in which the volume of the runner is formed approximately between the volume of the cavity and the volume of this runner is variable), and is used for injection molding to increase resin usage efficiency. We do it with the ones that provide the molds.
以下その構成等を図に示す実施例により詳細に説明する
。The configuration and the like will be explained in detail below with reference to embodiments shown in the drawings.
第２図は本発明に係る射出成形用金型の全体を示す斜視
図、第３図は同じくランナに樹脂が注入された状態を示
す断面図である。第４図は同じくキャビティに樹脂が充
填さｈた状態を示す断面図である。こｈらの図において
、第１図と同一の部材については同一の符号を付し、詳
細な説明は省略する。同図において、（２）は容積が可
変するランナで、上、下端ＫＩＦ１口部を有し上型（４
）内圧形成され、下端付近にはキャビティ（６１へ連通
するゲート（３１が設けられている。このランナ（２）
はその容積が液状樹脂等の注入前にはキャビティ（６）
の容積と略々間等に形成されている。（７）は鉛直方向
に進退自在の加圧子で、その一部が前記ランナ（２）内
に臨み他部が外部に％出するように設けられている。こ
の加圧子（７１によって成形時に前記ランナ（２）の容
積が可変可能に形成される。（８）は前記加圧子（７）
の上方への動作を規制するストッパで、鉤状に形成され
ている。このストッパ（８）は一部が前記上型（４）Ｋ
固定され、その先端部が前記加圧子（７）Ｋ係合してい
る。（９）は前記加圧子（７１を進退自在にするスプリ
ングで、この加圧子（７）を常時上方に付勢し、前記加
圧子（７）と前記上型（４１の間に配役−ｇｈでいる。FIG. 2 is a perspective view showing the entire injection mold according to the present invention, and FIG. 3 is a sectional view showing a state in which resin is injected into the runner. FIG. 4 is a sectional view similarly showing a state in which the cavity is filled with resin. In these figures, the same members as in FIG. 1 are designated by the same reference numerals, and detailed explanations will be omitted. In the same figure, (2) is a runner whose volume is variable, and has upper and lower ends KIF1 openings, and an upper mold (4
), and a gate (31) communicating with the cavity (61) is provided near the lower end of the runner (2).
The volume is the cavity (6) before injection of liquid resin, etc.
It is formed approximately between the volume of . (7) is a pressurizer that can move forward and backward in the vertical direction, and is provided so that a part thereof faces into the runner (2) and the other part extends outside. This pressure element (71) allows the volume of the runner (2) to be changed during molding. (8) is the pressure element (71).
This is a stopper that restricts the upward movement of the handle and is shaped like a hook. A part of this stopper (8) is the upper mold (4) K.
It is fixed, and its tip engages with the pressurizer (7)K. (9) is a spring that allows the pressurizer (71) to move forward and backward, and always urges the pressurizer (7) upward, and is placed between the pressurizer (7) and the upper mold (41). There is.
したがって、前記したようにスプリング（９）が加圧子
（７）を常時上方に付勢するので、加圧子（７）はスト
ッパ（８）Ｋ位置規制され、これｋよってランナ（２）
の容積はキャビティ（６１の容積と略々同勢に形成でれ
る。この状態において、液状樹脂を注入口＋１１より注
入しランナ（２）Ｋ充たす。しかる後、第３図に示すよ
うに加圧子（７）をその先端がランナ（２）の底部に達
するようにプレス等によシ矢印方向に加圧すれば、第４
図に示すようにランナ（２１内の液状Ｉ／Ｍ脂はゲート
（３）を経てキャビティ（６）Ｋ充填される。Therefore, as described above, since the spring (9) always urges the presser (7) upward, the presser (7) is restricted to the position of the stopper (8), which causes the runner (2) to
The volume of the cavity (61) is approximately the same as that of the cavity (61). In this state, liquid resin is injected from the injection port +11 to fill the runner (2) K. Thereafter, as shown in FIG. (7) is pressed in the direction of the arrow with a press or the like so that its tip reaches the bottom of the runner (2).
As shown in the figure, the liquid I/M fat in the runner (21) passes through the gate (3) and fills the cavity (6) K.
なお、本実施例によれば成形樹脂材料として液状樹脂を
使用するものを示したが、本発明はこわに限定されるも
のではなく、例えば計量済みの粉末状の樹脂または一定
形状のペレット状樹脂等を使用して、も勿論よい。Although this example uses a liquid resin as the molding resin material, the present invention is not limited to stiff resins, and for example, weighed powdered resin or pelletized resin of a certain shape Of course, you can also use .
以上説明したように本発明によりば、ランナの容積をキ
ャビティの容積と略々間等に形成すると共に１このラン
チの容積を可変可能にしたので、実施例に示すようにプ
レス等によプ加圧子を矢印方向に加圧すればランナの容
積が小さくなる方向に加圧子が移動するので、ランナ内
の樹脂はゲートを経てキャビティ内に射出されることに
なシ、したがって廃棄するべき樹脂はゲート内の樹脂だ
けＫなシ樹脂利用効率の向上をはかることができる。ま
たランナ内の樹脂を廃棄する工程を省くことＫなるので
成形が容易にでき、その成形にあたってコストの低廉化
をはかることができる２As explained above, according to the present invention, the volume of the runner is formed approximately between the volume of the cavity, and the volume of the launch is made variable. If the indenter is pressurized in the direction of the arrow, the indenter will move in the direction that reduces the volume of the runner, so the resin in the runner will not be injected into the cavity through the gate. It is possible to improve the efficiency of resin utilization by reducing only the amount of resin within. In addition, since the process of discarding the resin inside the runner can be omitted, molding can be facilitated, and the cost of molding can be reduced.
第１図は従来の射出成形用金型の全体を示す斜視図、第
２図は本発明に係う射出成形用金型の全体を示す斜視図
、第３図は同じくランナに樹脂が注入さｈた状態を示す
断面図、第４図は同じくキャビティに４’ｌ（脂が充填
された状態を示す断面図である。
（２）・・・・ランナ、（３１・・・・’７’−）、（
４１・・０．上型、（５）、・、・下型、（６１・、・
・キャビティ。
代理人 葛野信−（外１名）
し
り
細
炉Fig. 1 is a perspective view showing the entire conventional injection mold, Fig. 2 is a perspective view showing the entire injection mold according to the present invention, and Fig. 3 is a perspective view showing the entire injection mold of the present invention. FIG. 4 is a cross-sectional view showing the cavity filled with 4'l (fat). (2)...Runner, (31...'7') -), (
41...0. Upper mold, (5),... Lower mold, (61...
·cavity. Agent Makoto Kuzuno (1 other person) Shirisairo
Claims (1)
型において、前記ランナの容積をキャビティの容積と略
々間等に形成すると共に、このランチの容積を可変可能
にしたことを特徴とする射出成形用金型。An injection molding mold having a runner, a gate, and a cavity, characterized in that the volume of the runner is formed approximately between the volume of the cavity, and the volume of the launch is variable. Mold for use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2310482A JPS58138626A (en) | 1982-02-13 | 1982-02-13 | Metallic mold for injection molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2310482A JPS58138626A (en) | 1982-02-13 | 1982-02-13 | Metallic mold for injection molding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58138626A true JPS58138626A (en) | 1983-08-17 |
| JPH0153168B2 JPH0153168B2 (en) | 1989-11-13 |
Family
ID=12101149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2310482A Granted JPS58138626A (en) | 1982-02-13 | 1982-02-13 | Metallic mold for injection molding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58138626A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63137821A (en) * | 1986-11-29 | 1988-06-09 | Sumitomo Heavy Ind Ltd | Injection molding nozzle |
| WO1995032087A1 (en) * | 1994-05-24 | 1995-11-30 | Boschman Holding B.V. | Method and installation for encasing articles |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS435898Y1 (en) * | 1964-02-21 | 1968-03-14 |
-
1982
- 1982-02-13 JP JP2310482A patent/JPS58138626A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS435898Y1 (en) * | 1964-02-21 | 1968-03-14 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63137821A (en) * | 1986-11-29 | 1988-06-09 | Sumitomo Heavy Ind Ltd | Injection molding nozzle |
| WO1995032087A1 (en) * | 1994-05-24 | 1995-11-30 | Boschman Holding B.V. | Method and installation for encasing articles |
| US5885507A (en) * | 1994-05-24 | 1999-03-23 | Boschman Holding B.V. | Method for encasing articles |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0153168B2 (en) | 1989-11-13 |
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