JPS6285917A - Injection molding unit utilizing sand mold for molding - Google Patents
Injection molding unit utilizing sand mold for moldingInfo
- Publication number
- JPS6285917A JPS6285917A JP22658885A JP22658885A JPS6285917A JP S6285917 A JPS6285917 A JP S6285917A JP 22658885 A JP22658885 A JP 22658885A JP 22658885 A JP22658885 A JP 22658885A JP S6285917 A JPS6285917 A JP S6285917A
- Authority
- JP
- Japan
- Prior art keywords
- molding
- sand mold
- supporting frame
- molding sand
- cavity
- 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
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/37—Mould cavity walls, i.e. the inner surface forming the mould cavity, e.g. linings
-
- 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)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding 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、砂を樹脂で固めて成形した成形用砂型を用い
た射出成形装置、さらに詳しくいえば、気密を保持でき
る支持枠内に前記成形用砂型を支持して、溶融された成
形材料を注入するとともに、その支持枠内の空気を排出
するようにした成形用砂型を用いた射出成形装置に関す
る。Detailed Description of the Invention (Industrial Application Field) The present invention relates to an injection molding apparatus using a molding sand mold made by solidifying sand with a resin, and more specifically, the present invention relates to an injection molding apparatus using a molding sand mold made by hardening sand with a resin, and more specifically, to The present invention relates to an injection molding apparatus using a molding sand mold that supports the molding sand mold, injects molten molding material, and exhausts air within the support frame.
（発明の背景技術）
第２図は、プランジャ式の射出成形機の一例を示した図
である。(Background Art of the Invention) FIG. 2 is a diagram showing an example of a plunger type injection molding machine.
第２図において、１はホッパ、２は成形材料。In Fig. 2, 1 is a hopper and 2 is a molding material.
３はシリンダ、４は油圧装置、５はラム、６はトーピー
ド、７はバンドヒータ、８はノズル、９は金型である。3 is a cylinder, 4 is a hydraulic system, 5 is a ram, 6 is a torpedo, 7 is a band heater, 8 is a nozzle, and 9 is a mold.
ホッパ１からの成形材料２は、一定量ずつシリンダ３に
落下し、油圧装置４で駆動されるラム５で押され、シリ
ンダ３の内面とトーピード６との間の通路を通り、ここ
でバンドヒータ７により十分過熱され溶融状態になって
、ノズル８から金型９内に射出される。The molding material 2 from the hopper 1 falls into a cylinder 3 in fixed amounts, is pushed by a ram 5 driven by a hydraulic device 4, passes through a passage between the inner surface of the cylinder 3 and a torpedo 6, and is heated by a band heater. 7, it is sufficiently heated to a molten state, and is injected into a mold 9 through a nozzle 8.
（発明が解決しようとする問題点）
従来の射出成形機では、金型９のキャビキイ９ａ内の狭
い部分や、ノズル８から離れた部分で成形斑ができ、仕
上がりが悪いという問題点があった。(Problems to be Solved by the Invention) Conventional injection molding machines have had the problem that molding spots occur in narrow areas within the cavity key 9a of the mold 9 and in areas away from the nozzle 8, resulting in poor finish. .
本発明の目的は、気密を保持できる支持枠内に支持され
た、砂を樹脂で固めて成形した成形用の砂型に、溶融さ
れた成形材料を注入するとともに、その支持枠内の空気
を排出することにより、キャビキイ内の狭い部分やラン
ナから離れた部分の成形斑をなくし、仕上がりのよい成
形品を造ることができる成形用砂型を用いた射出成形装
置を提供することにある。The purpose of the present invention is to inject molten molding material into a molding sand mold made by hardening sand with resin, which is supported within an airtight support frame, and at the same time exhaust the air within the support frame. To provide an injection molding device using a sand mold for molding, which can eliminate molding irregularities in narrow parts within a cavity key and in parts far from a runner and produce molded products with a good finish.
（問題点を解決するための手段）
前記目的を達成ｒるために本発明による成形用砂型を用
いた射出成形装面ば、砂を樹脂で固めて通気性をもつよ
うに成形され、第１および第２の型によりキャビキイを
形成する成形用砂型と、前記成形用砂型内に挿入され、
前記キャビキイに溶融した成形材料を注入する通路とな
るランナ部材と、前記成形用砂型の第１および第２の型
に対応して分離でき、それらの型を支持して補強すると
ともに、内部を気密に保持できる支持枠と、前記成形用
砂型のキャビキイ内に前記溶融された成形材料を注入し
ているときに前記支持枠内の空気を排出する真空ポンプ
とから構成されている。(Means for Solving the Problems) In order to achieve the above object, the injection molding surface using the molding sand mold according to the present invention is made such that sand is hardened with resin and molded to have air permeability. and a molding sand mold for forming a cavity key with a second mold, the molding sand mold being inserted into the molding sand mold;
A runner member serving as a passage for injecting molten molding material into the cavity key can be separated corresponding to the first and second molds of the molding sand mold, supports and reinforces these molds, and has an airtight interior. and a vacuum pump that evacuates the air within the support frame while the molten molding material is injected into the cavity key of the molding sand mold.
（実施例）
以下、図面等を参照して、実施例について本発明の詳細
な説明する。(Example) Hereinafter, the present invention will be described in detail with reference to the drawings and the like.
第１図は、本発明による成形用砂型を用いた射出成形装
置の実施例を示した図である。FIG. 1 is a diagram showing an embodiment of an injection molding apparatus using a molding sand mold according to the present invention.
なお、第２図に示した射出成形機と同様な機能を果たす
部分には、同一の符合が付しである。Note that parts that perform the same functions as those of the injection molding machine shown in FIG. 2 are given the same reference numerals.
第１図において、１０は成形用砂型、１１は支持枠、１
２はランナ、１３は型締シリンダ、１４はバルブ、１５
は真空ポンプ、１６はバルブである。In FIG. 1, 10 is a molding sand mold, 11 is a support frame, 1
2 is a runner, 13 is a mold clamping cylinder, 14 is a valve, 15
is a vacuum pump, and 16 is a valve.
成形用砂型１０は、砂を樹脂で固めて製作した型である
。砂としては、例えば、成形品の表面の荒さによりフリ
ーマントルの５号〜８号程度のものを用いる。樹脂とし
ては、例えば、フルフラールまたはフルフリルアルコー
ルから得られるフラン樹脂を用いる。このフラン樹脂は
、砂の２％以下の重量比で混合して製作する。The molding sand mold 10 is a mold made by hardening sand with resin. As the sand, for example, Fremantle No. 5 to No. 8 sand is used depending on the roughness of the surface of the molded product. As the resin, for example, furan resin obtained from furfural or furfuryl alcohol is used. This furan resin is mixed with sand at a weight ratio of 2% or less.
成形用砂型１０は、支持枠１１で支持されている。支持
枠１１は、成形用砂型１０を支持して強度を増加させる
とともに、支持枠１１の内部を気密に保つ働きをする。The molding sand mold 10 is supported by a support frame 11. The support frame 11 supports the molding sand mold 10 to increase its strength, and also functions to keep the inside of the support frame 11 airtight.
成形用砂型１０．支持枠１１はバーテングラインＡ−Ａ
により固定側と可動側の２つ部分に分割することができ
る。固定側支持枠１１Ａに支持されている固定側成形用
砂型１０Ａは、ノズル８と成形用砂型１０のキャビキイ
１０ａを接続するランナ部材１２が設けられている。ラ
ンナ部材１２は、通気性のない材料で造られており、例
えば、金属製のパイプが用いられている。ランナ１２を
用いるのは、成形用砂型ｌＯのキャビキイ１０ａ内への
溶融された成形材料の注入を容易にするとともに、後述
する真空ポンプ１５により支持枠１１内を排気したとき
に、ランナ部の成形用砂型１０内に溶融された成形材料
が浸透してしまうのを防止するためである。可動側支持
枠Ｉ ＬＢおよびこれに支持されている可動側成形用砂
型１０Ｂは、型締シリンダ１３により開閉駆動される。Sand mold for molding 10. The support frame 11 is on the bartending line A-A.
It can be divided into two parts: a fixed side and a movable side. The fixed molding sand mold 10A supported by the fixed support frame 11A is provided with a runner member 12 that connects the nozzle 8 and the cavity key 10a of the molding sand mold 10. The runner member 12 is made of a material with no air permeability, and for example, a metal pipe is used. The runner 12 is used to facilitate the injection of the molten molding material into the cavity key 10a of the molding sand mold 1O, and also to allow the runner part to be molded when the inside of the support frame 11 is evacuated by the vacuum pump 15, which will be described later. This is to prevent the molten molding material from penetrating into the sand mold 10. The movable support frame ILB and the movable molding sand mold 10B supported by the movable support frame ILB are driven to open and close by a mold clamping cylinder 13.
支持枠１１の固定側１１Ａおよび可動側１１Ｂのそれぞ
れの一方側は、バルブ１４．１４を介して真空ポンプ１
５．１５が接続されており、他方側は、バルブ１６．１
６を介して大気に接続されている。One side of each of the fixed side 11A and the movable side 11B of the support frame 11 is connected to the vacuum pump 1 via a valve 14.14.
5.15 is connected, and on the other side, valve 16.1
6 to the atmosphere.
つぎに、本発明による本発明による成形用砂型を用いた
射出成形装置の動作を説明する。Next, the operation of the injection molding apparatus using the molding sand mold according to the present invention will be explained.
シリンダ３内で溶融された樹脂は、ノズル８からランナ
部材１２を介して、成形用砂型１０のキャビキイ１０ａ
内に注入し始めるとともに、バルブ１４．１４を開にし
、真空ポンプ１５．１５を作動させることにより、キャ
ビキイ１０ａ内に溶融した成形材料を圧入するとともに
、吸引する。The resin melted in the cylinder 3 is passed from the nozzle 8 through the runner member 12 to the cavity key 10a of the molding sand mold 10.
At the same time, by opening the valve 14.14 and operating the vacuum pump 15.15, the molten molding material is forced into the cavity key 10a and is sucked.
このように、真空ポンプ１５．１５で成形用砂型１０内
にある空気を排出することにより、注入された溶融され
た成形材料は、キャビキイ１０ａの狭い部分やランナ１
２から離れた部分にも引きつけられて成形の仕上がりが
よくなる。In this way, by discharging the air inside the molding sand mold 10 using the vacuum pump 15.15, the injected molten molding material is distributed to the narrow part of the cavity key 10a and the runner 1.
It is also attracted to parts far away from 2, improving the finish of the molding.
樹脂の注入が完了したのちには、パルプ１６゜１６を開
放して、外部の空気を支持枠１１内に吸入して、成形用
砂型１０の冷却を促進することができる。After the injection of resin is completed, the pulp 16° 16 can be opened to draw outside air into the support frame 11 to facilitate cooling of the molding sand mold 10.
（発明の効果）
以上詳しく説明したように、本発明によれば、気密を保
持できる支持枠内に支持された、砂を樹脂で固めて成形
した成形用の砂型に、溶融された成形材料を注入すると
ともに、その支持枠内の空気を排出するようにしたので
、キャビキイ内の狭い部分やランナから離れた部分の成
形斑がなくなり、仕上がりのよい成形品を造ることがで
きるという効果がある。(Effects of the Invention) As described in detail above, according to the present invention, a molten molding material is poured into a molding sand mold made by solidifying sand with resin and supported within a support frame that can maintain airtightness. Since the air inside the support frame is discharged at the same time as injection, there is no molding unevenness in narrow areas within the cavity keys or areas away from the runner, and it is possible to produce molded products with a good finish.
第１図は、本発明による成形用砂型を用いた射出成形装
置の実施例を示した図である。
第２図は、プランジャ式の射出成形機の一例を示した図
である。
１・・・ホッパ ２・・・成形材料３・・
・シリンダ ４・・・油圧装置５・・・ラム
６・・・トーピード７・・・バンドヒ
ータ ８・・・ノズル９・・・金型
１０・・・成形用砂型１１・−・支持枠
１２・・・ランナ１３・・・型締シリンダ １４
・・・バルブ１５・・・真空ポンプ １６・・・
バルブ特許出願人 春 日 幸 和
代理人 弁理士 井 ノ ロ 壽
矛２図
手続補正書
昭和６１年 ２月２５日
特許庁長官殿 人、
１、事件の表示 ′・ン昭和６０年特
許 願第２２６５８８号２、発明の名称
成形用砂型を用いた射出成形装置
３、補正をする者
事件との関係 特許出願人
住 所 東京都世田谷区中町２−１３−６名
称 春 日 幸 和４、代理人
住 所 ８１６０束臭要哲曹デ債π２話毘。′−瓢号と
ができる。」に補正する。FIG. 1 is a diagram showing an embodiment of an injection molding apparatus using a molding sand mold according to the present invention. FIG. 2 is a diagram showing an example of a plunger type injection molding machine. 1... Hopper 2... Molding material 3...
・Cylinder 4...Hydraulic device 5...Ram 6...Torpedo 7...Band heater 8...Nozzle 9...Mold
10... Sand mold for molding 11... Support frame
12...Runner 13...Mold clamping cylinder 14
...Valve 15...Vacuum pump 16...
Valve patent applicant Yuki Kasuga Kazu agent Patent attorney Inoro Jubao 2 Figure 2 Procedural amendments February 25, 1985 Director of the Japan Patent Office Person, 1. Indication of the case 1985 patent
Patent Application No. 226588 2, Name of Invention Injection molding device using molding sand mold 3, Relationship with the case of the person making the amendment Patent applicant Address 2-13-6 Nakamachi, Setagaya-ku, Tokyo
Name: Kasuga Yukiwa 4, agent address: 8160, 2 stories. ′-Hyogo can be written. ”.
Claims (4)
第１および第２の型によりキャビキィを形成する成形用
砂型と、前記成形用砂型内に挿入され、前記キャビキィ
に溶融した成形材料を注入する通路となるランナ部材と
、前記成形用砂型の第１および第２の型に対応して分離
でき、それらの型を支持して補強するとともに、内部を
気密に保持できる支持枠と、前記成形用砂型のキャビキ
ィ内に前記溶融された成形材料を注入しているときに前
記支持枠内の空気を排出する真空ポンプとから構成した
成形用砂型を用いた射出成形装置。(1) Sand is hardened with resin and molded to be breathable.
a molding sand mold forming a cavity key by first and second molds; a runner member inserted into the molding sand mold and serving as a passage for injecting molten molding material into the cavity key; and a supporting frame that can be separated in correspondence with a second mold, supporting and reinforcing the molds, and keeping the inside airtight, and injecting the molten molding material into the cavity of the molding sand mold. An injection molding apparatus using a molding sand mold comprising a vacuum pump that evacuates air from within the support frame during the molding process.
特許請求の範囲第１項記載の成形用砂型を用いた射出成
形装置。(2) An injection molding apparatus using a molding sand mold according to claim 1, wherein the molding sand mold is hardened with furan resin.
範囲第１項記載の成形用砂型を用いた射出成形装置。(3) An injection molding apparatus using a molding sand mold according to claim 1, wherein the runner member is a metal pipe.
成形材料を注入したのちに内部に冷却空気を流入できる
バルブを備えた特許請求の範囲第１項記載の成形用砂型
を用いた射出成形装置。(4) The molding sand mold according to claim 1 is used, wherein the support frame is provided with a valve that allows cooling air to flow into the mold after the molten molding material is injected into the molding sand mold. Injection molding equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22658885A JPS6285917A (en) | 1985-10-11 | 1985-10-11 | Injection molding unit utilizing sand mold for molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22658885A JPS6285917A (en) | 1985-10-11 | 1985-10-11 | Injection molding unit utilizing sand mold for molding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6285917A true JPS6285917A (en) | 1987-04-20 |
| JPH0531450B2 JPH0531450B2 (en) | 1993-05-12 |
Family
ID=16847530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22658885A Granted JPS6285917A (en) | 1985-10-11 | 1985-10-11 | Injection molding unit utilizing sand mold for molding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6285917A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03159708A (en) * | 1989-11-17 | 1991-07-09 | Sintokogio Ltd | Mold apparatus |
| WO2001026849A1 (en) * | 1999-10-14 | 2001-04-19 | Yugen Kaisha Esumorudo | Die casting method, die-cast article, and die casting machine |
| JP2016529140A (en) * | 2013-08-29 | 2016-09-23 | シンプリシティー ワークス ユーロップ，エセ．エレ．Ｓｉｍｐｌｉｃｉｔｙ Ｗｏｒｋｓ Ｅｕｒｏｐｅ，Ｓ．Ｌ． | Mold for manufacturing 3D goods |
-
1985
- 1985-10-11 JP JP22658885A patent/JPS6285917A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03159708A (en) * | 1989-11-17 | 1991-07-09 | Sintokogio Ltd | Mold apparatus |
| WO2001026849A1 (en) * | 1999-10-14 | 2001-04-19 | Yugen Kaisha Esumorudo | Die casting method, die-cast article, and die casting machine |
| JP2016529140A (en) * | 2013-08-29 | 2016-09-23 | シンプリシティー ワークス ユーロップ，エセ．エレ．Ｓｉｍｐｌｉｃｉｔｙ Ｗｏｒｋｓ Ｅｕｒｏｐｅ，Ｓ．Ｌ． | Mold for manufacturing 3D goods |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0531450B2 (en) | 1993-05-12 |
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