JPH0447913A - Injection molder - Google Patents
Injection molderInfo
- Publication number
- JPH0447913A JPH0447913A JP15828690A JP15828690A JPH0447913A JP H0447913 A JPH0447913 A JP H0447913A JP 15828690 A JP15828690 A JP 15828690A JP 15828690 A JP15828690 A JP 15828690A JP H0447913 A JPH0447913 A JP H0447913A
- Authority
- JP
- Japan
- Prior art keywords
- molten resin
- dwelling
- mold
- valve
- injection
- 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.)
- Pending
Links
- 238000002347 injection Methods 0.000 title claims abstract description 21
- 239000007924 injection Substances 0.000 title claims abstract description 21
- 239000011347 resin Substances 0.000 claims abstract description 18
- 229920005989 resin Polymers 0.000 claims abstract description 18
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- 238000001746 injection moulding Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 abstract description 8
- 238000000465 moulding Methods 0.000 abstract description 4
- 238000001816 cooling Methods 0.000 abstract description 2
- 206010013642 Drooling Diseases 0.000 abstract 1
- 208000008630 Sialorrhea Diseases 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
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
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/57—Exerting after-pressure on the moulding material
- B29C45/572—Exerting after-pressure on the moulding material using movable mould wall or runner parts
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】 〔産業上の利用分野］ 本発明は射出成形機に関するものである。[Detailed description of the invention] [Industrial application field] The present invention relates to an injection molding machine.
〔従来の技術］
従来の射出成形機は、加熱シリンダから射出スクリュー
により一定量の溶融樹脂を金型内へ射出し充填後一定時
間保圧後冷却により成形品品質を整えた後取出し製品と
するようになっている。[Conventional technology] A conventional injection molding machine injects a certain amount of molten resin into a mold from a heating cylinder using an injection screw, fills the mold, holds the pressure for a certain period of time, cools it down, and then takes out the product. It looks like this.
すなわち、射出、保圧、計量の各工程が連続的にしかも
同一の加熱シリンダ、射出スクリューを用いて行われて
いるように構成されている。That is, the injection, pressure holding, and metering steps are performed continuously using the same heating cylinder and injection screw.
〔発明が解決しようとする課題］
従来の射出成形機は上記のように構成されているので、
成形時間短縮などの合理化を行う場合に限界があり、特
に保圧時間の短縮ができない問題点があった。[Problem to be solved by the invention] Since the conventional injection molding machine is configured as described above,
There is a limit when it comes to rationalization such as shortening the molding time, and there is a particular problem in that it is not possible to shorten the holding pressure time.
本発明は、従来の技術の有するこのような問題点に鑑み
てなされたものであり、その目的とするところは、保圧
時間の短縮等により成形工程の合理化が可能である射出
成形機を提供しようとするものである。The present invention has been made in view of the above-mentioned problems of the conventional technology, and its purpose is to provide an injection molding machine that can streamline the molding process by shortening the pressure holding time, etc. This is what I am trying to do.
上記の問題点を解決するために、本発明の射出成形機に
おいては、射出成形機の加熱シリンダの射出口に開閉弁
を設けるとともに、上記射出口に、金型に溶融樹脂を射
出充填後上記開閉弁を閉じた場合に上記溶融樹脂に保持
圧力を加えうる保圧装置を付設したものである。In order to solve the above problems, in the injection molding machine of the present invention, an on-off valve is provided at the injection port of the heating cylinder of the injection molding machine, and the above-mentioned A pressure holding device is attached that can apply holding pressure to the molten resin when the on-off valve is closed.
〔実施例〕 〔作用〕
第１図は本発明の射出成形機の一実施例を示す断面図で
あり、２は溶融樹脂を射出口４から射出する射出スクリ
ュー１を収納する加熱シリンダで、上記射出口４には、
シャフトオフバルブのような開閉弁３が設けられている
。５は射出口４に付設される保圧装置であり、溶融樹脂
を加熱シリンダ２から金型１０に射出する通路であるホ
ットランナ部８、保圧用シリンダ６、埋込ヒータ７から
構成されている。金型１０は型締材１１により保圧装置
に締着されている。なお、図示は省略するが保圧用シリ
ンダ６にはこれに圧力を加えるポンプなどが接続されて
いる。[Embodiment] [Operation] Fig. 1 is a sectional view showing an embodiment of the injection molding machine of the present invention, and 2 is a heating cylinder housing an injection screw 1 for injecting molten resin from an injection port 4; In the injection port 4,
An on-off valve 3 such as a shaft off valve is provided. 5 is a pressure holding device attached to the injection port 4, and is composed of a hot runner section 8, which is a passage for injecting molten resin from the heating cylinder 2 to the mold 10, a pressure holding cylinder 6, and an embedded heater 7. . The mold 10 is fastened to a pressure holding device by a mold clamping material 11. Although not shown in the drawings, the pressure-retaining cylinder 6 is connected to a pump or the like that applies pressure thereto.
次に作用を説明すると、開閉弁３を開き、加熱シリンダ
２中の溶融樹脂を射出スクリュー１によりホットランナ
部８を通して金型１０内に射出充填する０次に開閉弁３
を閉じ、保圧用シリンダ６により溶融樹脂９に一定時間
すなわち金型１０の入口部分の溶融樹脂９が固化するま
で保圧を加える。Next, to explain the operation, the on-off valve 3 is opened and the molten resin in the heating cylinder 2 is injected and filled into the mold 10 through the hot runner section 8 by the injection screw 1.
is closed, and a holding pressure is applied to the molten resin 9 by the pressure holding cylinder 6 for a certain period of time, that is, until the molten resin 9 at the entrance of the mold 10 is solidified.
次いで冷却工程を経て金型１０から成形体を取り出すが
、この際保圧用シリンダ６を後退させ溶融樹脂９の鼻た
れ現象を防止する。The molded body is then taken out from the mold 10 through a cooling process, but at this time the pressure holding cylinder 6 is moved back to prevent the molten resin 9 from dripping.
本発明によると、射出成形時に従来加熱シリンダ中の射
出スクリューにより行われていた溶ｗＡ樹脂の保圧を別
に備えた保圧装置で行うようにしたので、保圧工程と計
量工程を同時に行うことができ、したがって成形時間が
短縮されるばかりでなく、保圧時に溶融樹脂のバックフ
ローがないため成形品の重量のばらつき等が少なくなり
品質が向上し、さらに射出スクリュ先端の形状の簡易化
が可能である等の効果がある。According to the present invention, during injection molding, pressure holding of the molten wA resin, which was conventionally performed by an injection screw in a heating cylinder, is performed by a separate pressure holding device, so that the pressure holding process and the metering process can be performed at the same time. Therefore, not only is the molding time shortened, but there is no backflow of molten resin during pressure holding, which reduces variations in the weight of molded products and improves quality.Furthermore, the shape of the injection screw tip can be simplified. There are effects such as being possible.
第１図は本発明による射出成形機の一実施例を示す断面
図である。
符号の説明
１・−射出スクリュー
３・−・開閉弁
５−保圧装置
７−埋込ヒータ
９−熔融樹脂
１１−型締材
２−加熱シリンダ
４−射出口
６−保圧用シリンダ
８−ホットランナ部
１〇−金型FIG. 1 is a sectional view showing an embodiment of an injection molding machine according to the present invention. Explanation of symbols 1 - Injection screw 3 - On-off valve 5 - Pressure holding device 7 - Embedded heater 9 - Molten resin 11 - Mold clamping material 2 - Heating cylinder 4 - Injection port 6 - Pressure holding cylinder 8 - Hot runner Part 10 - Mold
Claims (1)
るとともに、上記射出口に、金型に溶融樹脂を射出充填
後上記開閉弁を閉じた場合に上記溶融樹脂に保持圧力を
加えうる保圧装置を付設したことを特徴とする射出成形
機。1. An on-off valve is provided at the injection port of the heating cylinder of the injection molding machine, and a retainer is provided at the injection port that can apply holding pressure to the molten resin when the on-off valve is closed after injection and filling of the mold. An injection molding machine characterized by being equipped with a pressure device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15828690A JPH0447913A (en) | 1990-06-15 | 1990-06-15 | Injection molder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15828690A JPH0447913A (en) | 1990-06-15 | 1990-06-15 | Injection molder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0447913A true JPH0447913A (en) | 1992-02-18 |
Family
ID=15668280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15828690A Pending JPH0447913A (en) | 1990-06-15 | 1990-06-15 | Injection molder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0447913A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0800908A1 (en) * | 1996-04-12 | 1997-10-15 | HERBST, Richard | Method and apparatus for injection moulding of plastic parts |
| CN1080933C (en) * | 1995-12-20 | 2002-03-13 | 台湾通用器材股份有限公司 | Injection molding method and apparatus for various components such as semiconductor components |
-
1990
- 1990-06-15 JP JP15828690A patent/JPH0447913A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1080933C (en) * | 1995-12-20 | 2002-03-13 | 台湾通用器材股份有限公司 | Injection molding method and apparatus for various components such as semiconductor components |
| EP0800908A1 (en) * | 1996-04-12 | 1997-10-15 | HERBST, Richard | Method and apparatus for injection moulding of plastic parts |
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