JPS60127128A - Plastic molding die device - Google Patents
Plastic molding die deviceInfo
- Publication number
- JPS60127128A JPS60127128A JP23694383A JP23694383A JPS60127128A JP S60127128 A JPS60127128 A JP S60127128A JP 23694383 A JP23694383 A JP 23694383A JP 23694383 A JP23694383 A JP 23694383A JP S60127128 A JPS60127128 A JP S60127128A
- Authority
- JP
- Japan
- Prior art keywords
- runner
- contraction
- mold
- launch
- runners
- 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
- 238000010137 moulding (plastic) Methods 0.000 title claims description 3
- 230000008602 contraction Effects 0.000 abstract description 7
- 238000000465 moulding Methods 0.000 abstract description 6
- 239000011347 resin Substances 0.000 abstract description 5
- 229920005989 resin Polymers 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract 1
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000002360 preparation method Methods 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
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】
本発明は、プラスチック成形金型装置に関するものでり
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a plastic mold apparatus.
プラスチック成形においては、少ながらず収縮の問題が
めり、これによって製品に反りや変形を生じて寸法精度
を損なう。特に第１図および第２図のように、製品１の
内周面部にゲート部２を配置せざるを得ない場合は、ス
プル一部６からゲート部２へ連通するランナ部４の収縮
の影響を特に受け易く、製品１０寸法精度が低下する。Plastic molding often suffers from shrinkage, which causes warping and deformation of the product and impairs dimensional accuracy. In particular, when the gate part 2 must be placed on the inner peripheral surface of the product 1 as shown in FIGS. 1 and 2, the effect of shrinkage of the runner part 4 communicating from the sprue part 6 to the gate part 2 The dimensional accuracy of the product 10 decreases.
かかる場合の問題解決に当って、従来は、ゲート形状を
工夫した９、射出圧力を高めたり、型締め加圧時間を長
くしたシ、型温度を厳しくコントロールすることで対処
していた。しかしこれでは成形のサイクル時間が長くな
り、成形効率が低下してしまう。Conventionally, such problems have been solved by devising the gate shape9, increasing the injection pressure, lengthening the mold clamping pressure time, and strictly controlling the mold temperature. However, this increases the molding cycle time and reduces molding efficiency.
本発明の目的は、簡単な型構造でサイクル時間を長くす
ることなしに、ランナ部の収縮による製品への影響を少
なくし、寸法精度を向上することでめる。An object of the present invention is to reduce the influence of shrinkage of the runner part on the product and improve dimensional accuracy without increasing the cycle time with a simple mold structure.
本発明によるプラスチック成形金調装Ｗは、スプルーに
連通した第１ランチに続いて、間隙が小なる屈曲した第
２ランナを有し、この第２ランナの先端部にキャビティ
に通じるゲートが形成されている、型開き後に第１ラン
チに工υ形成された部分が収縮したとき、縞２ランチに
より形成された部分がそれに相応し−Ｃ伸び、第１ラン
チ部の収縮が製品に及ぶのを回避するところに特徴を有
する。The plastic molded metal preparation W according to the present invention has a bent second runner with a small gap following the first launch communicating with the sprue, and a gate communicating with the cavity is formed at the tip of the second runner. When the part formed by the first launch shrinks after opening the mold, the part formed by the stripe second launch expands accordingly, avoiding the shrinkage of the first launch from affecting the product. It is characterized by the fact that it
第６図にお諭で、固定側の金型５にスプルー６が形成さ
れ、可動側の金型７にスプルーロックピン８お工びエジ
ェクトピン９が摺動自在に嵌合している。そして金型５
と金型７とによって第１ランナ１０．第２ランナ１１．
ゲート１２お工び製品形状に対応するキャビティ１６が
形成されている。第１ランナ１０はスプルー９工９径方
向に放射状に延伸し、この第１ランチ１０に連通してい
る第２ランナ１１も実質的に同方向に延伸している。第
２ランチ１１は第一１ランナ１０に対し厚み間隙が刀・
なり小さく、この実ＩＭ例では半円弧状に屈曲している
。そしてこの第２ランナ１１の先端部にゲート１２が形
成されている。かかる構造の金型装置によれば、樹脂は
スプルー６、第１ランナ１０．第２ランナ１１．ゲート
１２を介してキャビティ１６に導〃・れ、第４因のよう
にスプル一部６ａ、第１ランチ部１０ａ、第２ランナ部
１１ａ。As shown in FIG. 6, a sprue 6 is formed in the mold 5 on the fixed side, and a sprue lock pin 8 and an eject pin 9 are slidably fitted in the mold 7 on the movable side. And mold 5
and the mold 7 to form the first runner 10. 2nd runner 11.
A cavity 16 corresponding to the shape of the gate 12 is formed. The first runner 10 extends radially in the radial direction of the sprue 9, and the second runner 11 communicating with the first launch 10 also extends substantially in the same direction. The second launch 11 has a thickness gap similar to that of the first runner 10.
In this actual IM example, it is bent in a semicircular arc shape. A gate 12 is formed at the tip of this second runner 11. According to the mold device having such a structure, the resin is distributed through the sprue 6, the first runner 10. 2nd runner 11. The sprue part 6a, the first launch part 10a, and the second runner part 11a are led to the cavity 16 through the gate 12, and as the fourth factor, the sprue part 6a, the first launch part 10a, and the second runner part 11a.
ケート部１２ａおよびキャビティ１５に対応する成形品
１６ａが形成される。A molded product 16a corresponding to the cage portion 12a and the cavity 15 is formed.
ところで射出された樹脂は、それが硬化する際に収縮す
る。このとき、スプル一部６ａや第１ランチ部１０ａは
樹脂注入時の流動性を確保するために十分な肉厚を持た
せざるを得す、このためにこの部分の硬化時の収縮が特
に大きくなる。第１ランチ部１０ａの収縮は、成形品１
３ａを中心に引寄せるように作用するが、本発明に１．
ｃれば、その収縮に相応して第２ランナ部１１ａが弾性
的に引き伸ばされるだけで、成形品１３ａに第１ランナ
１０ａの収縮が影響するのが阻止され、成形品１３ａが
反りや変形を受けることなく高精度で成形される。By the way, the injected resin contracts when it hardens. At this time, the sprue portion 6a and the first launch portion 10a must have sufficient wall thickness to ensure fluidity during resin injection, and for this reason, the shrinkage of this portion during curing is particularly large. Become. The contraction of the first launch portion 10a is caused by the contraction of the molded product 1
3a to the center, but the present invention has 1.
If the second runner portion 11a is elastically stretched in accordance with the contraction, the shrinkage of the first runner 10a is prevented from affecting the molded product 13a, and the molded product 13a is prevented from warping or deforming. It is molded with high precision without receiving any damage.
第２ランチ部１１ａｉ半円弧状の他に、第５図示のよう
に略Ｖ字形に屈曲した形状とすることも可能である。さ
らに第１ランチ部１１ａまたは１１ａ′の複数個を波状
に連設しても工い。In addition to the semicircular arc shape of the second launch portion 11ai, it is also possible to have a substantially V-shaped bent shape as shown in the fifth figure. Furthermore, a plurality of first launch portions 11a or 11a' may be arranged in a wavy manner.
上述した本発明によれば、樹脂の収縮、特には第１ラン
ナ部の収縮の影響が第２ランナ部で緩衝吸収されて成形
品に及ばないから、成形品を高精度に成形できる。さら
に精度向上のために、従来のように射出圧力を高めたり
、型締め加圧時間を長くしたシする必要がないから、生
産効率を低下させることがない。また型構造を簡単でめ
るから低コストで実施できる。According to the present invention described above, the influence of the shrinkage of the resin, particularly the shrinkage of the first runner section, is absorbed by the second runner section and does not affect the molded article, so that the molded article can be molded with high precision. Furthermore, in order to improve accuracy, there is no need to increase the injection pressure or lengthen the mold clamping pressurization time as in the past, so there is no reduction in production efficiency. Moreover, since the mold structure is simple, it can be implemented at low cost.
第１図は従来の成形金型装置にＬつで成形した一例の正
面図、第２図は第１図ｕ−ｆｆ線断面図、第６図は本発
明による成形金型装置の一実施例のｖｆ１面（９）、第
４図は同上金型装置によって成形−されたものの断面図
、第５図は他の実施例の要部断面図でめる。
５・・・固足供ｎ金型
６・・・スプルー
７・・・可動側金型
８・・・スプルーロックピン
９・・・エジェクトピン
１０・・・第１ランナ
１１・・・第２ランチ
１２・・・ゲート
１３・・・キャビティ
以上
特許出願人 株式会社 精 工 舎
代理人 弁理士 最上 務Fig. 1 is a front view of an example of molding with L in a conventional molding die device, Fig. 2 is a sectional view taken along the line u-ff in Fig. 1, and Fig. 6 is an embodiment of the forming die device according to the present invention. vf1 side (9), FIG. 4 is a sectional view of the product molded by the same molding apparatus, and FIG. 5 is a sectional view of the main part of another embodiment. 5... Fixed foot mold 6... Sprue 7... Movable side mold 8... Sprue lock pin 9... Eject pin 10... First runner 11... Second launch 12... Gate 13... Cavity or above Patent applicant Seikosha Co., Ltd. Agent Patent attorney Tsutomu Mogami
Claims (1)
通しかつ間隙が小なる屈曲した第２ランチと、この第２
ランチの先端部に形成しキャビティに連通ずるゲートと
を備えたプラスチック成形金型装置。A first launch that communicates with the sprue, a bent second launch that communicates with the first runner and has a small gap, and a bent second launch that communicates with the first runner and has a small gap;
A plastic molding device equipped with a gate formed at the tip of the launch and communicating with the cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23694383A JPS60127128A (en) | 1983-12-15 | 1983-12-15 | Plastic molding die device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23694383A JPS60127128A (en) | 1983-12-15 | 1983-12-15 | Plastic molding die device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60127128A true JPS60127128A (en) | 1985-07-06 |
| JPH0134130B2 JPH0134130B2 (en) | 1989-07-18 |
Family
ID=17008044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23694383A Granted JPS60127128A (en) | 1983-12-15 | 1983-12-15 | Plastic molding die device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60127128A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109304438A (en) * | 2017-07-26 | 2019-02-05 | 株式会社日立制作所 | Die casting and die casting equipment |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56120220U (en) * | 1980-02-15 | 1981-09-12 |
-
1983
- 1983-12-15 JP JP23694383A patent/JPS60127128A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56120220U (en) * | 1980-02-15 | 1981-09-12 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109304438A (en) * | 2017-07-26 | 2019-02-05 | 株式会社日立制作所 | Die casting and die casting equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0134130B2 (en) | 1989-07-18 |
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