JPS63189215A - Nozzle for plastic injection molder - Google Patents
Nozzle for plastic injection molderInfo
- Publication number
- JPS63189215A JPS63189215A JP2180787A JP2180787A JPS63189215A JP S63189215 A JPS63189215 A JP S63189215A JP 2180787 A JP2180787 A JP 2180787A JP 2180787 A JP2180787 A JP 2180787A JP S63189215 A JPS63189215 A JP S63189215A
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- zirconia
- plastic
- plastic injection
- injection molder
- 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
- 239000004033 plastic Substances 0.000 title claims abstract description 24
- 229920003023 plastic Polymers 0.000 title claims abstract description 24
- 238000002347 injection Methods 0.000 title abstract 3
- 239000007924 injection Substances 0.000 title abstract 3
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000000919 ceramic Substances 0.000 claims abstract description 21
- 238000001746 injection moulding Methods 0.000 claims description 10
- 229910002077 partially stabilized zirconia Inorganic materials 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 10
- 238000000465 moulding Methods 0.000 description 8
- 239000011347 resin Substances 0.000 description 8
- 229920005989 resin Polymers 0.000 description 8
- 239000000843 powder Substances 0.000 description 6
- 239000000945 filler Substances 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002994 raw material Substances 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010304 firing Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910052863 mullite Inorganic materials 0.000 description 2
- 239000011029 spinel Substances 0.000 description 2
- 229910052596 spinel Inorganic materials 0.000 description 2
- 238000010186 staining Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 229910001315 Tool steel Inorganic materials 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 description 1
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000000975 co-precipitation Methods 0.000 description 1
- 239000006084 composite stabilizer Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 238000001513 hot isostatic pressing Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 239000002905 metal composite material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000010137 moulding (plastic) Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 239000011164 primary particle Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000001308 synthesis 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
- B29C45/20—Injection nozzles
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、プラスチック射出成形機用ノズルに関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a nozzle for a plastic injection molding machine.
［従来の技術］
プラスチック射出成形機用ノズルは、従来そのほとんど
が工具鋼等の金属材料のみでつくられている。[Prior Art] Conventionally, most nozzles for plastic injection molding machines have been made only of metal materials such as tool steel.
［発明が解決しようとする問題点］
従来の金属製ノズルでは、プレートアウト、ヨゴレ等の
問題があり、これがプラスチック成形運転、特にロング
ラン性に重大な影響をもたらすが、ノズル自体の価格の
安さ等が理由で、それらの問題はあまりかえりみられて
いなかった。[Problems to be solved by the invention] Conventional metal nozzles have problems such as plate-out and staining, which have a serious impact on plastic molding operation, especially long-run performance, but the low price of the nozzle itself, etc. For this reason, these issues have not been given much attention.
（このプレートアウト、およびヨゴレは、プラスチック
の加工分野で使用する用語であって「プレートアウト」
はノズル内面に滞留する樹脂中の添加剤等の熱劣化物質
であり、これが増加すると、樹脂の流れ不良がおこる。(This plate-out and dirt is a term used in the field of plastic processing.
is a thermally degraded substance such as an additive in the resin that stays on the inner surface of the nozzle, and if this increases, the resin will flow poorly.
またこれが樹脂中に混入し、製品不良の原因となり成形
運転が不能となる。Moreover, this gets mixed into the resin, causing product defects and making molding operations impossible.
また「ヨゴレ」はノズル内面にプラスチックが滞留し、
それが熱劣化したものをいい、プレートアウト同様の四
囲を起こす。）
また近年、プラスチックに無機質、有機質、金属等のフ
ィラーを混入して、プラスチックの特性を広げようとす
る動きが高まりつつある。このようなフィラーの入った
プラスチックの成形に従来の金属製ノズルを使用すると
、ノズルが摩耗しやすく、その寿命がごく短くなる。Also, "dirt" is caused by plastic remaining on the inside of the nozzle.
It refers to something that has deteriorated due to heat, and causes encircling similar to plate out. ) In recent years, there has been a growing movement to expand the properties of plastics by incorporating fillers such as inorganic, organic, and metal fillers into plastics. When conventional metal nozzles are used to mold plastics containing such fillers, the nozzles are prone to wear and have a very short lifespan.
本発明は、このような従来のプラスチック射出成形機用
ノズルにおける欠点を解消したもの、すなわちプレート
アウトやヨゴレの少ない、かつ、耐摩耗性にすぐれたプ
ラスチック射出成形機用ノズルを提供するものである。The present invention eliminates the drawbacks of conventional nozzles for plastic injection molding machines, that is, provides a nozzle for plastic injection molding machines that is less likely to plate out or become stained and has excellent wear resistance. .
［問題点を解決するための手段およびその作用］本発明
者らは、ジルコニア焼結体は強度および硬度が高いだけ
でなく、溶融したプラスチックが付着しに＜＜、これに
よって上記の問題点が解決されることを見出し、本発明
に到達した。[Means for Solving the Problems and Their Effects] The present inventors have discovered that zirconia sintered bodies not only have high strength and hardness, but also have the ability to prevent molten plastic from adhering to them, thereby solving the above problems. We have found a solution to this problem and have arrived at the present invention.
すなわち、本発明は、ジルコニアを４０ｗｔ％以上含む
セラミックスからなるプラスチック射出成形機用ノズル
を要旨とする。That is, the gist of the present invention is a nozzle for a plastic injection molding machine made of ceramics containing 40 wt% or more of zirconia.
本発明が適用されるプラスチック用ノズルとし、、 て
、たとえば次のものをあげることができるが′、これら
に限定されるわけではない。Examples of plastic nozzles to which the present invention is applied include, but are not limited to, the following.
（１）オーブンノズル
（２）ニードルノズル
（３）スライドノズル
本発明のノズルは、全体がセラミックスで構成されたも
のであってもよく、また、プラスチックが接触する部分
にのみジルコニア４０ｖｔ％以上ノセラミックスを使用
し、他の部分は金属製ケースとして上記セラミックス部
材と、焼バメ、接着またはカシメ等の方法で支持させれ
ばよい。このセラミックス部の厚みとしては０．１〜５
ｍｍあればよい。(1) Oven nozzle (2) Needle nozzle (3) Slide nozzle The nozzle of the present invention may be made entirely of ceramics, or only the part that comes into contact with plastic is made of 40vt% or more zirconia. The other parts may be supported by a method such as shrink fitting, adhesion, or caulking with the ceramic member as a metal case. The thickness of this ceramic part is 0.1 to 5
mm is enough.
このようにして、とくに大型のノズルの製作費を下げる
ことができる。In this way, the production costs, especially for large nozzles, can be reduced.
ジルコニア系セラミックスと金属との線膨張係数が近似
しているので、上記セラミックス−金属複合体は使用温
度でその両者間の剥離がおこらない。Since the coefficients of linear expansion of the zirconia ceramic and the metal are similar, the ceramic-metal composite does not peel off between the two at the operating temperature.
本発明のノズルのセラミックス部分は、ジルコニアを４
ｏｗｔ％以上含まねばならない。これは、ジルコニア焼
結体のみからなるものであってもよく、また８０ｗｔ％
までは他のセラミックスが混じっていてもよいことを意
味する。他のセラミックスとしては、例えば、アルミナ
、スピネル、ムライト等をあげるとかできるが、アルミ
ナとの混合セラミックスが硬度、耐摩耗性等の点ですぐ
れている。The ceramic part of the nozzle of the present invention is made of zirconia.
It must contain at least owt%. This may be made only of zirconia sintered body, and 80wt%
This means that other ceramics may be mixed. Examples of other ceramics include alumina, spinel, and mullite, but ceramics mixed with alumina are superior in terms of hardness, wear resistance, etc.
また、ジルコニア含有量４０ｗｔ％以上であればジルコ
ニアがもつプラスチックとの非親和性が維持され、プレ
ートアウト、ヨゴレによるトラブルを小さくすることが
できる。Further, if the zirconia content is 40 wt% or more, the non-compatibility of zirconia with plastics is maintained, and troubles due to plate-out and staining can be reduced.
ジルコニアとしては、強度、靭性および耐熱性のよい部
分安定化ジルコニアがもっトモよい。部分安定化ジルコ
ニアに固溶させる安定化剤の適当な量は、イツトリアで
は１〜５Ｉｌｏ１％、カルシアでは２〜９１１ｏ１％、
マグネシアでは８〜ｌＯｍｏ１％、セリアでは８〜８０
ｍｏ１％等である。As the zirconia, partially stabilized zirconia, which has good strength, toughness, and heat resistance, is most suitable. The appropriate amount of the stabilizer to be dissolved in partially stabilized zirconia is 1 to 5Ilo1% for Ittria, 2 to 911O1% for Calcia,
8-10mo1% for magnesia, 8-80 for ceria
mo1% etc.
これらを２種以上固溶化させてもよい。Two or more of these may be dissolved in solid solution.
ソノ中でも、イツトリア部分安定化ジルコニアは、とく
に高強度かえられ、また２００ ”Ｃ付近における安定
性にもすぐれており、強度低下もなく、本発明の材料と
してとくに適している。Among the materials, ittria partially stabilized zirconia has particularly high strength and excellent stability near 200''C, and there is no decrease in strength, making it particularly suitable as a material for the present invention.
本発明のノズルの製造にあたっては、焼結性のすぐれた
微粉末を原料とする必要がある。ジルコニアは湿式法で
えられた１次粒子径２００〜４００人の微粉末を、また
アルミナ、スピネル、ムライト等は湿式法または共沈法
でえられた高純度粉末を用いるのが望ましい。In manufacturing the nozzle of the present invention, it is necessary to use a fine powder with excellent sinterability as a raw material. For zirconia, it is desirable to use a fine powder with a primary particle size of 200 to 400 particles obtained by a wet method, and for alumina, spinel, mullite, etc., to use a high purity powder obtained by a wet method or coprecipitation method.
この原料粉末をラバープレス法等によって所望の形に成
形し、焼成してセラミックスかえられる。This raw material powder is molded into a desired shape by a rubber press method, etc., and fired to convert it into ceramics.
この焼成法としては、常圧の焼成法でもよく、さらに熱
間静水圧加圧焼成法（ＨＩＰ処理）を加えてもよい。As this firing method, a normal pressure firing method may be used, and a hot isostatic pressing firing method (HIP treatment) may be added.
このようにして得られたセラミックスをダイヤモンド砥
石等で研削、研摩し、所定の寸法および表面あらさに仕
上げて、本発明に使用するセラミックス部材かえられる
。The ceramics thus obtained are ground and polished using a diamond grindstone or the like to achieve predetermined dimensions and surface roughness, and then the ceramic members used in the present invention can be changed.
［発明の効果コ
本発明のノズルをプラスチックの成形に使用することに
より、以下の効果をあげることができる。[Effects of the Invention] By using the nozzle of the present invention for molding plastics, the following effects can be achieved.
（１）表面のきれいな製品を得ることができる。(1) A product with a clean surface can be obtained.
（２）長期連続運転を行ってもノズルにプレートアウト
、ヨゴレの発生が少ないので、一定品質の製品が得られ
、生産性向上につながる。(2) Even during long-term continuous operation, there is little plate-out or dirt on the nozzle, so products of constant quality can be obtained, leading to improved productivity.
（３）運転を停止しても、プラスチックがノズル内部に
付着しにくいので、清掃が容易である。(3) Even if the operation is stopped, cleaning is easy because plastic does not easily adhere to the inside of the nozzle.
（４）フィラーを多く添加したプラスチックを成形して
も、ノズルが摩耗しにくい。(4) The nozzle is less likely to wear out even if plastic is molded with a large amount of filler.
（５）異常流動が発生しにくいので、従来のノズルでは
成形が困難であった低流動性樹脂の成形が容易である。(5) Since abnormal flow is less likely to occur, it is easy to mold low fluidity resins that are difficult to mold with conventional nozzles.
［実施例］
以下、本発明を具体例によって説明するが、本発明はこ
れに限定されるものではない。[Example] The present invention will be described below using specific examples, but the present invention is not limited thereto.
実施例１〜３、比較例１，２
（ノズルの製造）
表１の原料粉末を湿式合成法によりえた。該原料粉末を
ラバープレス法によって成形し、表中の温度で焼成して
、セラミックスをえた。また、一部のものはさらにＨＩ
Ｐ処理した。Examples 1 to 3, Comparative Examples 1 and 2 (Manufacture of nozzles) The raw material powders shown in Table 1 were obtained by a wet synthesis method. The raw material powder was molded by a rubber press method and fired at the temperature shown in the table to obtain ceramics. In addition, some items are even more HI
P-treated.
このセラミックスを研削、研摩、穴加工し、所定の寸法
に仕上げ、鋼に焼バメして、樹脂との接触部をセラミッ
クスとしたノズルをつくった。This ceramic was ground, polished, and drilled to the desired dimensions, and then shrink-fitted to steel to create a nozzle in which the contact part with the resin was made of ceramic.
また、比較のため鋼にクロムメッキしたノズル（従来品
）もテストした。For comparison, we also tested a chrome-plated steel nozzle (conventional product).
（射出成形テスト）
上記のようにしてつくったノズルを用いて平板の成形を
行った。(Injection molding test) A flat plate was molded using the nozzle made as described above.
各成形終了後は、ノズルおよびシリンダーを分解して清
掃し、ノズルを交換した後、次の例の成形に移った。After each molding was completed, the nozzle and cylinder were disassembled and cleaned, and the nozzle was replaced before moving on to molding the next example.
成形および測定条件は、以下のとおりである。The molding and measurement conditions are as follows.
（１）樹脂 東洋曹達工業■製塩化ビニル樹脂リューロ
ン８００８Ｋ Ｐ−７００
（２）射出成形機
ａ 本体 東芝機械■製Ｉ８５０ Ａ （３０ｚ）ｂ
ダイス 平板１４０ Ｘ ８０Ｘ ２ｔ （關）（３）
成形条件
ａ シリンダ一温度
Ｃ−Ｉ Ｃ−２Ｃ−３Ｎ１１
１５０℃ １８０℃ １７０℃ １８０℃ｂ ダイス温
度 ５０℃
Ｃスクリュー回転数 ３８ｒｐｍ
（４）ノズルの形状
オーブンノズル、ノズル出口直径３報
（５）コンパウンド
鉛系複合安定剤ＴＲ−８００（水沢化学社製）を樹脂１
００市量部に対し４．２重量部と可゛塑剤ＤＯＰ １０
重量部、フィラー（炭酸カルシウム）１０重量部を添加
し、ヘンシェルミキサーで混合した混合物を上記射出成
形に供した。(1) Resin Vinyl chloride resin Ryuron 8008K P-700 manufactured by Toyo Soda Kogyo ■ (2) Injection molding machine a Main body I850 A (30z) b manufactured by Toshiba Machine ■
Dice flat plate 140 x 80 x 2t (related) (3)
Molding conditions a Cylinder temperature C-I C-2C-3N11 150℃ 180℃ 170℃ 180℃b Die temperature 50℃ C screw rotation speed 38 rpm (4) Nozzle shape Oven nozzle, nozzle exit diameter 3 reports (5) Compound Add lead-based composite stabilizer TR-800 (manufactured by Mizusawa Chemical Co., Ltd.) to resin 1.
4.2 parts by weight to 00 parts by weight and plasticizer DOP 10
parts by weight, and 10 parts by weight of filler (calcium carbonate) were added thereto and mixed in a Henschel mixer, and the mixture was subjected to the injection molding described above.
（６）測定
連続成形運転２００シヨツト成形後ノズルを取外し、ノ
ズル内部に付着しているプレートアウト、ヨゴレをかき
取り、そのｆｆ１ｆｆｉの測定を行った。結果を表１に
示す。実施例１〜３では２００シヨツト経過してもノズ
ル内部への付着物は少ないが、比較例１および２ではプ
レートアウト、ヨゴレの付着が多く発生した。(6) Measurement Continuous Molding Operation After 200 shots of molding, the nozzle was removed, the plateout and dirt adhering to the inside of the nozzle were scraped off, and the ff1ffi was measured. The results are shown in Table 1. In Examples 1 to 3, there was little adhesion inside the nozzle even after 200 shots, but in Comparative Examples 1 and 2, a lot of plate-out and dirt adhesion occurred.
Claims (2)
らなるプラスチック射出成形機用ノズル。(1) A nozzle for a plastic injection molding machine made of ceramics containing 40 wt% or more of zirconia.
求の範囲第１項記載のプラスチック射出成形機用ノズル
。(2) The nozzle for a plastic injection molding machine according to claim 1, wherein the zirconia is partially stabilized zirconia.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2180787A JPS63189215A (en) | 1987-02-03 | 1987-02-03 | Nozzle for plastic injection molder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2180787A JPS63189215A (en) | 1987-02-03 | 1987-02-03 | Nozzle for plastic injection molder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63189215A true JPS63189215A (en) | 1988-08-04 |
Family
ID=12065323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2180787A Pending JPS63189215A (en) | 1987-02-03 | 1987-02-03 | Nozzle for plastic injection molder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63189215A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS648012A (en) * | 1987-06-30 | 1989-01-12 | Meiki Seisakusho Kk | Nozzle structure of injection molding machine |
| JP2006162686A (en) * | 2004-12-02 | 2006-06-22 | Ricoh Co Ltd | Optical deflecting element, optical deflector provided with the element, and picture display device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61272119A (en) * | 1985-05-27 | 1986-12-02 | Shinagawa Refract Co Ltd | Molding equipment for plastic material |
| JPS62134234A (en) * | 1985-12-06 | 1987-06-17 | Miyagawa Kasei Kogyo Kk | Nozzle for injection molding |
-
1987
- 1987-02-03 JP JP2180787A patent/JPS63189215A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61272119A (en) * | 1985-05-27 | 1986-12-02 | Shinagawa Refract Co Ltd | Molding equipment for plastic material |
| JPS62134234A (en) * | 1985-12-06 | 1987-06-17 | Miyagawa Kasei Kogyo Kk | Nozzle for injection molding |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS648012A (en) * | 1987-06-30 | 1989-01-12 | Meiki Seisakusho Kk | Nozzle structure of injection molding machine |
| JP2006162686A (en) * | 2004-12-02 | 2006-06-22 | Ricoh Co Ltd | Optical deflecting element, optical deflector provided with the element, and picture display device |
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