JPH01113218A - Rotary valve of injection molding machine - Google Patents
Rotary valve of injection molding machineInfo
- Publication number
- JPH01113218A JPH01113218A JP27268787A JP27268787A JPH01113218A JP H01113218 A JPH01113218 A JP H01113218A JP 27268787 A JP27268787 A JP 27268787A JP 27268787 A JP27268787 A JP 27268787A JP H01113218 A JPH01113218 A JP H01113218A
- Authority
- JP
- Japan
- Prior art keywords
- cylinder
- resin
- resistant material
- column
- molten resin
- 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
- 238000001746 injection moulding Methods 0.000 title claims description 10
- 239000011347 resin Substances 0.000 claims abstract description 34
- 229920005989 resin Polymers 0.000 claims abstract description 34
- 239000000463 material Substances 0.000 claims abstract description 18
- 238000002347 injection Methods 0.000 abstract description 5
- 239000007924 injection Substances 0.000 abstract description 5
- 238000005299 abrasion Methods 0.000 abstract 3
- 238000010586 diagram Methods 0.000 description 3
- 239000003365 glass fiber Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009760 electrical discharge machining Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006355 external stress Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000010959 steel Substances 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
- B29C45/20—Injection nozzles
- B29C45/23—Feed stopping equipment
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (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、ノズル先端にロータリーバルブ方式の絞り弁
を備えた射出成形機におけるロータリーバルブに関する
ものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a rotary valve in an injection molding machine equipped with a rotary valve type throttle valve at the tip of a nozzle.
（従来の技術）
特開昭５５−９３５２３号公報に示すように、回転駆動
されるロータリーバルブを射出成形機のノズル先端部に
設けた機構が知られている。また、ロータリーバルブを
用いた射出成形機の制御方法に間し、特願昭６１−６７
０５４において、本発明者が提案したものがある。(Prior Art) As shown in Japanese Unexamined Patent Publication No. 55-93523, a mechanism is known in which a rotationally driven rotary valve is provided at the tip of a nozzle of an injection molding machine. In addition, we have developed a method for controlling an injection molding machine using a rotary valve, and applied for a patent application in 1986-67
054, proposed by the present inventor.
（発明が解決しようとする問題点）
前記、従来の技術に於けるロータリーバルブは、第５図
に示すごとく円柱３０の絞り穴３３と、ノズル部１１の
樹脂流通管路１５との相対位置を変化させることで、ノ
ズル部１１の溶融樹脂の流れを変化させるが、樹脂流通
管路相互の紋り穴のエツジが摩耗や欠けによって形状が
変化すると、バルブとしての機能を損なう。(Problems to be Solved by the Invention) As shown in FIG. By changing the shape, the flow of the molten resin in the nozzle portion 11 is changed, but if the shape of the edges of the embossed holes between the resin flow pipes changes due to wear or chipping, the function as a valve will be impaired.
しかし、昨今特に樹脂材料に充填材（例えばガラス繊維
、炭酸カルシウム、シリコンカーバイト等）を混入する
場合が多く、前記紋り穴３３及び樹脂流通管路１５のエ
ツジが著しく摩耗する弊害があった。However, in recent years, fillers (e.g., glass fiber, calcium carbonate, silicon carbide, etc.) are often mixed into resin materials, which has had the disadvantage of causing significant wear on the edges of the embossed holes 33 and the resin flow conduit 15. .
そのため、円柱３０及び円柱３０が摺動するノズル部１
１全体を高硬度な耐摩耗材料にて製作したが、耐摩耗材
料は鋼材に比べ機械加工が困難なため、コストが高くな
る上にぜい性材料であるため、材料強度の信頼性が低い
という弊害もあった。そこで第４図に示すごとく、円柱
３０及び円柱３０が摺動する相手部材３７を高硬度な耐
摩耗材料にて製作し銀ロー付等でノズル部材１１と接合
すると、接合部の強度は小さく信頼性も著しく低いため
、使用時の熱疲労及び接合部へかかる外部応力により、
接合部が破断に到るという弊害があった。Therefore, the cylinder 30 and the nozzle part 1 on which the cylinder 30 slides.
1. The entire structure was made of a highly hard and wear-resistant material, but since wear-resistant materials are more difficult to machine than steel materials, the cost is higher, and since it is a brittle material, the reliability of the material strength is low. There was also a disadvantage. Therefore, as shown in FIG. 4, if the cylinder 30 and the mating member 37 on which the cylinder 30 slides are made of a highly hard and wear-resistant material and joined to the nozzle member 11 with silver soldering, the strength of the joint will be small and reliable. Due to thermal fatigue and external stress applied to the joints during use,
This had the disadvantage of causing the joint to break.
なお、第４図及び第５図は従来の技術であるが、第１図
〜第４図と同じ番号のものは共通である。Although FIGS. 4 and 5 are conventional techniques, the same numbers as in FIGS. 1 to 4 are common.
（問題点を解決するための手段）
本発明は前記従来の問題点を解決するためになされたも
ので、ノズル部１１の樹脂流通管路１５に交差する円柱
３０を回動することにより、前記円柱３０を貫通する絞
り穴３３を、前記樹脂流通管路１５に連通及び遮断する
ロータリーバルブに於いて、前記円柱３０が高硬度の耐
摩耗材料より成り、前記円柱３０を内部に遊嵌し、前記
樹脂流通管路１５に連通する貫通穴３３′を穿設した高
硬度の耐摩耗材料から成るブツシュ３６を、前記ノズル
部１１に固設したことを特徴とする射出成形機用ロータ
リーバルブに関する。(Means for Solving the Problems) The present invention has been made to solve the above-mentioned conventional problems, and by rotating the cylinder 30 intersecting the resin flow pipe 15 of the nozzle part 11, the above-mentioned In a rotary valve that communicates and blocks a throttle hole 33 passing through a cylinder 30 with the resin flow pipe 15, the cylinder 30 is made of a highly hard wear-resistant material, and the cylinder 30 is loosely fitted inside; The present invention relates to a rotary valve for an injection molding machine, characterized in that a bushing 36 made of a highly hard wear-resistant material and having a through hole 33' communicating with the resin flow conduit 15 is fixed to the nozzle portion 11.
（作用）
前記構成とすることにより、樹脂材料にガラス繊維等の
充填材を添加しても、円柱３ｏの紋り穴３３及び、ブツ
シュ３６の貫通穴３３′のエツジ部に摩耗や欠けが生ず
ることがないため、溶融樹脂の流量を正確に長期間にわ
たり制御することができる。(Function) With the above structure, even if a filler such as glass fiber is added to the resin material, wear and chipping will not occur at the edges of the embossed hole 33 of the cylinder 3o and the through hole 33' of the bush 36. Therefore, the flow rate of the molten resin can be accurately controlled over a long period of time.
また、円柱３０との摺動部をブツシュ３６としたので、
他のノズル部１１は゛従来の長所をそのまま活かすこと
ができ、製作が容易になると同時に、強度上に於いても
長期にわたり信頼性が大幅に向上する。In addition, since the sliding part with the cylinder 30 is a bush 36,
The other nozzle section 11 can utilize the advantages of the conventional nozzle as is, and is easy to manufacture, and at the same time, its reliability over a long period of time is greatly improved in terms of strength.
（実施例）
第１図は、第２図に示す射出成形機に於いて樹脂の射出
量を制御するためのノズル部１１に間する、本発明の一
実施例を示す図である。(Embodiment) FIG. 1 is a diagram showing an embodiment of the present invention, which is installed in a nozzle section 11 for controlling the injection amount of resin in the injection molding machine shown in FIG.
第２図に於いて、ハウジングｌの中間部孔ｌａ内には、
スクリュー２が摺動及び回転自在に挿入され、そのスク
リュー２の先端部２ａは円錐形状となっていると共に、
後端部２ｂは大径となってホッパ３内の溶融樹脂が後端
側に漏れないようにしであると共に、スプライン軸４が
連結され、このスプライン軸４はスラスト軸受５を介し
て射出シリンダ６のピストン杆７に連結していると共に
、スプライン軸４には図示しない回転駆動源に連結した
ギヤ８がスプライン嵌合している。In FIG. 2, inside the intermediate hole la of the housing l,
A screw 2 is slidably and rotatably inserted, and the tip 2a of the screw 2 has a conical shape, and
The rear end portion 2b has a large diameter to prevent the molten resin in the hopper 3 from leaking to the rear end side, and is connected to a spline shaft 4, which is connected to the injection cylinder 6 via a thrust bearing 5. A gear 8 connected to a rotational drive source (not shown) is spline-fitted to the spline shaft 4 .
前記ノズル部１１は樹脂流通管路１５の中間に回転自在
な円柱３０を設け、この円柱３ｏをレバー３１を介して
シリンダ３２に連結して、シリンダ３２でレバー３１を
介して円柱３０を回転して樹脂流通管路１５の間口面積
を増減する構成からなる。The nozzle part 11 has a rotatable cylinder 30 in the middle of the resin flow conduit 15, and this cylinder 3o is connected to a cylinder 32 via a lever 31, so that the cylinder 32 rotates the cylinder 30 via the lever 31. The resin flow conduit 15 has a structure in which the frontage area of the resin flow conduit 15 is increased or decreased.
第３図は第２図のＰ部拡大図である。第１図〜第３図に
於いて、紋り穴３３近傍の耐久性を向上させるため、円
柱３０及び円柱が摺動する゛相手部材となるブツシュ３
６を超硬合金で製作し、該ブツシュ３６は冷嵌（ノズル
１１の焼嵌でもよい）によってノズル部１１に固定する
。この時、円柱３０とブツシュ３６を貫通する絞り穴３
３及び貫通穴３３′が樹脂流通管路１５と滑らかにつな
がるように、冷嵌（ノズル！■の焼嵌でもよい）実施後
、円柱を挿入し、所定の位置で固定後、放電加工で、共
加工した。FIG. 3 is an enlarged view of section P in FIG. 2. In FIGS. 1 to 3, in order to improve the durability near the perforated hole 33, a cylinder 30 and a bushing 3 which is a mating member on which the cylinder slides are shown.
6 is made of cemented carbide, and the bushing 36 is fixed to the nozzle part 11 by cold fitting (shrink fitting of the nozzle 11 may also be used). At this time, the throttle hole 3 passing through the cylinder 30 and the bushing 36
3 and the through hole 33' are smoothly connected to the resin flow conduit 15, after performing cold fitting (shrink fitting of the nozzle!■ may also be used), insert a cylinder and fix it in a predetermined position, then use electrical discharge machining to Co-processed.
その後、ブツシュ３６０回動を防止する目的で回り止め
のビン３５をブツシュ３６の外接線近傍に打ち込んだ。Thereafter, in order to prevent the bushing 360 from rotating, an anti-rotation pin 35 was driven into the vicinity of the outer tangent of the bushing 36.
前記構成に於いて、固体樹脂がホッパ３からハウジング
１の中間部孔１ａ内に供給され、ハウジング１に内蔵さ
れたヒータ（図示せず）により樹脂が溶融されながら回
転するスクリュー２により前方に送られる。In the above configuration, solid resin is supplied from the hopper 3 into the intermediate hole 1a of the housing 1, and is sent forward by the rotating screw 2 while being melted by a heater (not shown) built into the housing 1. It will be done.
一方、射出シリンダ６のピストン杆７の押力によって、
樹脂流通管路１５内の溶融樹脂が加圧されているため、
別置制御装置（図示せず）により油圧シリンダ３２のビ
ストンストロークを制御すれば、レバー３１を介して円
柱３０の回転量が制御される。On the other hand, due to the pushing force of the piston rod 7 of the injection cylinder 6,
Since the molten resin in the resin distribution pipe 15 is pressurized,
If the piston stroke of the hydraulic cylinder 32 is controlled by a separate control device (not shown), the amount of rotation of the cylinder 30 is controlled via the lever 31.
前記円柱３００回転量に応じて、円柱３０の紋り穴３３
とブツシュ３６の貫通穴３３′との連通面積を、変化さ
せることにより、ノズルから射出される溶融樹脂の量を
制御するようになっている。この種射出成形機の溶融樹
脂は約３００℃、２０００気圧になるが、円柱３０及び
ブツシュ３６が共に超硬合金材で作成されているため、
熱膨張量に差がなくこれら回動面からの樹脂漏れを少な
く抑えることができる。Depending on the amount of rotation of the cylinder 300, the crest hole 33 of the cylinder 30
By changing the area of communication between the bushing 36 and the through hole 33', the amount of molten resin injected from the nozzle is controlled. The molten resin in this type of injection molding machine is approximately 300°C and 2000 atm, but since the cylinder 30 and bushing 36 are both made of cemented carbide,
There is no difference in the amount of thermal expansion, and resin leakage from these rotating surfaces can be suppressed to a low level.
５ＫＰ６１材に窒化処理した材料にて作成した円柱３０
及びノズル本体から成るバルブがガラス繊維３０％入Ｐ
Ｐ（ポリプロピレン）材で摩耗テストを実施した結果、
６０Ｈで０．２ｍｍ（全径に対し約７％）摩耗したのに
対し、本発明の構成によるバルブとしてブッシュ３６及
Ｕ円柱３０に超硬合金を用いたもので、同様のテストを
１５０Ｈ実施した結果、摩耗の発生は認められなかフた
。Cylinder 30 made from nitrided 5KP61 material
The bulb consisting of the nozzle body and the nozzle body contains 30% glass fiber.
As a result of performing a wear test on P (polypropylene) material,
While the valve was worn by 0.2 mm (approximately 7% of the total diameter) at 60 hours, a similar test was conducted for 150 hours with a valve constructed according to the present invention in which cemented carbide was used for the bushing 36 and the U cylinder 30. As a result, no wear was observed.
また、コスト的にはノズル１１及び円柱３０全体を超硬
合金で製作する場合に比較し、約１７３の値段で製作で
き、非常に安価となった。In addition, in terms of cost, compared to the case where the nozzle 11 and the entire cylinder 30 are made of cemented carbide, it can be manufactured at a price of about 173, which is very low.
（発明の効果）
前記のごとく、本発明によれば射出成形機用ロータリー
バルブの耐久性を向上したので、樹脂の射出量を長期に
わたり正確に制御することができ、製品の品質を大幅に
安定化することができる。(Effects of the Invention) As described above, according to the present invention, the durability of the rotary valve for an injection molding machine has been improved, making it possible to accurately control the amount of resin injection over a long period of time, and greatly stabilizing the quality of the product. can be converted into
また、ブツシュを使用することにより、従来技術に比へ
強度的に著しい信頼性の向上が得られると共に、コスト
的にも大幅な低減が得られる。Further, by using a bushing, a remarkable improvement in strength and reliability can be obtained compared to the conventional technology, and a significant reduction in cost can also be obtained.
さらに、本発明のロータリーバルブは、円柱とブツシュ
が熱膨張係数の同種の材料で作成されているため、回動
面からの樹脂漏れを最小限に抑えることができる。Further, in the rotary valve of the present invention, since the cylinder and the bushing are made of materials with the same coefficient of thermal expansion, resin leakage from the rotating surface can be minimized.
第１図は、本発明の一実施例を示す国 策２図は、本発明を適用した射出成形機の全体構成図 第３図は、第２図のＰ部拡大図 第４図及び第５図は従来技術を示す図である。 １１−・・ノズル部 １５・・・樹脂流通管路 ３０・・・円柱 ３３・・・絞り穴 ３３′・・・貫通穴 ３６φφ・ブツシュ Figure 1 shows a country in which an embodiment of the present invention is shown. Figure 2 is an overall configuration diagram of an injection molding machine to which the present invention is applied. Figure 3 is an enlarged view of section P in Figure 2. FIGS. 4 and 5 are diagrams showing the prior art. 11-... Nozzle part 15...Resin distribution pipe 30...Cylinder 33...Aperture hole 33'...Through hole 36φφ・butshu
Claims (1)
回転することにより、前記円柱３０を貫通する絞り穴３
３を、前記樹脂流通管路１５に連通及び遮断するロータ
リーバルブに於いて、前記円柱３０が高硬度の耐摩耗材
料より成り、前記円柱３０を内部に遊嵌し、前記樹脂流
通管路１５に連通する貫通穴３３′を穿設した高硬度の
耐摩耗材料から成るブッシュ３６を前記ノズル部１１に
固設したことを特徴とする射出成形機用ロータリーバル
ブ。By rotating the cylinder 30 that intersects with the resin flow conduit 15 of the nozzle part 11, the throttle hole 3 passing through the cylinder 30 is formed.
3, in a rotary valve that communicates with and shuts off the resin flow pipe 15, the cylinder 30 is made of a high-hardness wear-resistant material, the cylinder 30 is loosely fitted inside, and the cylinder 30 is connected to the resin flow pipe 15. A rotary valve for an injection molding machine, characterized in that a bush 36 made of a highly hard wear-resistant material and having a communicating through hole 33' is fixed to the nozzle portion 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27268787A JPH01113218A (en) | 1987-10-27 | 1987-10-27 | Rotary valve of injection molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27268787A JPH01113218A (en) | 1987-10-27 | 1987-10-27 | Rotary valve of injection molding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01113218A true JPH01113218A (en) | 1989-05-01 |
Family
ID=17517395
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27268787A Pending JPH01113218A (en) | 1987-10-27 | 1987-10-27 | Rotary valve of injection molding machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01113218A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1991004841A1 (en) * | 1989-09-27 | 1991-04-18 | Komatsu Ltd. | Rotary valve of injection molding machine |
| JPH0512111U (en) * | 1991-06-06 | 1993-02-19 | 株式会社新潟鐵工所 | Resin leak prevention device in injection molding machine |
| US5430570A (en) * | 1992-07-22 | 1995-07-04 | Fuji Xerox Co., Ltd. | Light deflector |
| CN104191579A (en) * | 2014-08-29 | 2014-12-10 | 苏州正豪塑胶电子有限公司 | Die casting control device |
-
1987
- 1987-10-27 JP JP27268787A patent/JPH01113218A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1991004841A1 (en) * | 1989-09-27 | 1991-04-18 | Komatsu Ltd. | Rotary valve of injection molding machine |
| JPH0512111U (en) * | 1991-06-06 | 1993-02-19 | 株式会社新潟鐵工所 | Resin leak prevention device in injection molding machine |
| US5430570A (en) * | 1992-07-22 | 1995-07-04 | Fuji Xerox Co., Ltd. | Light deflector |
| CN104191579A (en) * | 2014-08-29 | 2014-12-10 | 苏州正豪塑胶电子有限公司 | Die casting control device |
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