JPS5926211A - Extrusion pin for plastic - Google Patents
Extrusion pin for plasticInfo
- Publication number
- JPS5926211A JPS5926211A JP13601782A JP13601782A JPS5926211A JP S5926211 A JPS5926211 A JP S5926211A JP 13601782 A JP13601782 A JP 13601782A JP 13601782 A JP13601782 A JP 13601782A JP S5926211 A JPS5926211 A JP S5926211A
- Authority
- JP
- Japan
- Prior art keywords
- extrusion pin
- plastic
- treatment
- temperature
- extrusion
- 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
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
Description
【発明の詳細な説明】 スチック用押出ピンに関するものである。[Detailed description of the invention] This relates to extrusion pins for sticks.
プラスチック用押出ピンとしては，使用中折損しないよ
う充分な強靭性を有すること、摺動而の耐摩耗性の大き
いこと、剛焼イマｊ性の良好なことなどの性質のほかに
、長時間使用中に＝を法変化舎生じないことが要求され
る。As extruded pins for plastics, in addition to properties such as sufficient toughness to prevent breakage during use, high sliding abrasion resistance, and good hardening resistance, they also have the following properties: It is required that = does not occur within the law.
従来，一般のプラスチック用押出ピンとしては、ＪＩＳ
ＳＫＳ，２／の合金工具鋼をｇ３θ°Ｃ油冷後。Conventionally, as general plastic extrusion pins, JIS
SKS, 2/ alloy tool steel after g3θ°C oil cooling.
／ざθ〜一θθ′Ｃに焼もどして， ＩＩＲＯ乙θ〜６
βの硬さにしたものが広く用いられている。しかし。/za θ~1 θθ′C, IIRO Otsu θ~6
Those with a hardness of β are widely used. but.
８ＫＢ．２／押出ビンは、プラスチック成型時の作業温
度が／にθ〜！θθ゛Ｃの場合にやよ，長時間使用後に
寸法変化を生じて膨張する欠点がある。このような寸法
変化は，残留オーステナイトが使用中に少しずつ分解し
て膨張変化をきたすためである。8KB. 2/ For extrusion bottles, the working temperature during plastic molding is θ~! In the case of θθ゛C, there is a drawback that dimensions change and expand after long-term use. Such dimensional changes occur because retained austenite gradually decomposes and expands during use.
８ＫＳ２／は，ｇ３θ°Ｃ油冷の°ま寸では，約／ｊチ
の残留オーステナイトを有するが、こｉｔを３９６°Ｃ
に焼戻すと，＆％が分解して，残留オーステナイト計け
／／チになる。焼戻温度を、２Ｊθ℃まで高くす２１ば
、残留オーステナイトけθチとなるため。8KS2/ has approximately /j of retained austenite when oil-cooled at g3θ°C, but when heated to 396°C
When tempered, &% decomposes and becomes residual austenite. If the tempering temperature is increased to 2Jθ℃21, the retained austenite becomes less θ.
使用中の寸法変化けなくなるが、硬さがｌ＋ｎ０５ｇ以
下に低下し、耐摩耗性不足となるため採用できない。Dimensional changes during use will not occur, but the hardness will drop below l+n05g, resulting in insufficient wear resistance, so it cannot be adopted.
本発明け、と几らの問題に鑑みてなされたものであり、
ＳＫＳ？／Ｊｌｌ！！押出ピンよりも寸法安定性が優ｎ
でおり、しかも材料価格が安く１経済的な押出ピンを提
供することを目的とする。The present invention was made in view of the problems of Rin et al.
SKS? /Jll! ! Superior dimensional stability than extruded pins
The purpose of the present invention is to provide an economical extrusion pin with low material cost.
すなわち１本発明は、合金組成として重ｔ％で、Ｃθ、
ワ ０〜／、／ ０ ％、 ｓｔ θ、／θ〜
０．３３ ％ｔ Ｍｎθ、／θ〜θ、ｊθチ、 Ｏｒ
／、、！θ〜／、６θチ、残部を鉄および不純物より
なる鋼の棒材を、所定の形状に加工したのち、ｇθθ〜
ｇＳθ°Ｃからマルクエンチまたは油焼入後、−６θ〜
−／り６℃でサブゼロ処理所・し、ひきつづき、２３θ
〜、２に０°Ｃで焼もどし処Ｉ！ｌ！ヲ施ずことを特徴
とするプラスチック用押出ビンである。That is, in the present invention, the alloy composition is t% by weight, Cθ,
Wa 0~/, /0%, st θ, /θ~
0.33%t Mnθ, /θ~θ, jθchi, Or
/,,! θ~/, 6θchi, after processing a steel bar with the remainder made of iron and impurities into a predetermined shape, gθθ~
After mark quenching or oil quenching from gSθ°C, -6θ~
- Sub-zero treatment at 6℃, followed by 23θ
~, 2 to 0°C tempering place I! l! This is an extrusion bottle for plastics, which is characterized by the fact that it does not contain water.
次に、本発明に係る押出ピンの組成限定理由ならびに熱
処理条件限定理由を述べる。Ｃけマルテンツイト中に固
溶して基地の硬さ全高くシ、また炭化物を形成して耐摩
耗性全向上する効果を有するが、Ｃがθ、ワθチ未満で
はｉＪ摩耗性が不足し。Next, reasons for limiting the composition and heat treatment conditions of the extrusion pin according to the present invention will be described. C dissolves in martensite and has the effect of increasing the hardness of the matrix and forming carbides to improve wear resistance, but if C is less than θ and θ, iJ wear resistance is insufficient.
／、／チをこえると靭性が低下するので、θ、りθ〜／
、／θチに限定した。８１け、脱酸剤として添加するが
、θ、／θチ未満でけその効果少なく、θ［５％’ｔこ
えても効果の向」二が少ないので、θ、／θ〜θ、３
！； ％とした。Ｍｎも脱酸剤として添加するが。If the toughness exceeds /, /, the toughness decreases, so θ, riθ~/
, /θchi. 81 is added as a deoxidizing agent, but if it is less than θ, /θ, the deoxidizing effect will be small, and even if it exceeds θ[5%'t, the effect will be less.
! ; %. Mn is also added as a deoxidizing agent.
θ、／θチ未満では、その効果少なく、オたθ、ｊθ％
？こ對−ると焼入時の残留オーステナイ） 用が増υ口
して焼入硬度が低下するので、θ、／θ〜θ１．５θチ
とした。Ｏｒは焼入性を大きくシ、また炭化物を形成し
て耐摩耗性の向上に役立つが、 Ｏｒが７．２チ未満で
は、その効果少なく、また／、乙チをこえると靭性を低
下するので、／、ノθ〜へ乙θチに限定した。If the value is less than θ, /θ, the effect will be small, and the value of
? On the other hand, since the residual austenite during quenching increases and the quenching hardness decreases, θ, /θ to θ1.5θ were set. Or greatly improves hardenability and forms carbides to improve wear resistance, but if Or is less than 7.2 inches, this effect will be small, and if it exceeds 7.2 inches, the toughness will decrease. , /, limited to ノθ~he θchi.
以上、説明した合金組成を有する鋼の？Ｐ月を加工して
押出ピンの形状にしたものを塩浴炉、電気炉または真空
焼入炉によって加熱したのち、マルクエンチまたは油冷
によって焼入硬化するが、この際の焼入ｊＪｏｊ熱温度
がざθθ°Ｃ未満では不完全焼入となり、オたざ６θ’
ｃ ＝ｚこえると残留オーステナイト敢が多くなって、
焼入硬さが低下し、また結晶粒度が粗大化して靭性が低
下するので、焼入加！ｖＩＪ温度としては、ざ００〜ｇ
６０℃とした。Which steel has the alloy composition described above? After processing the P moon into the shape of an extruded pin and heating it in a salt bath furnace, electric furnace or vacuum quenching furnace, it is quenched and hardened by marquenching or oil cooling, but the quenching temperature at this time is If the temperature is less than θθ°C, incomplete quenching will occur, and the temperature will be less than 6θ'.
When c = z exceeds, the amount of retained austenite increases,
Quenching hardness decreases, grain size becomes coarser, and toughness decreases, so quenching is not recommended! vIJ temperature is 00~g
The temperature was 60°C.
押出ピンとしては、、耐摩耗性の大きいことが必要信性
であり、熱処狸硬さはｌｌｎ０ｇθ以上でなけ１１ばな
らない。また、プラスチック成型時の作簗温１．！Ｉが
／ｇθ〜−θθ’ＣＩ７） ３局合には、使用中の押出
ピンの寸法変化を避けるために適切な熱処理をほどこさ
なけオｔばならない。As an extrusion pin, high abrasion resistance is required for reliability, and heat treatment hardness must be 11 or more. In addition, the production temperature during plastic molding is 1. ! In the third case, where I is /gθ~-θθ'CI7), appropriate heat treatment must be applied to avoid dimensional changes in the extrusion pin during use.
焼入鋼は過飽和固溶体のマルテンＩノイドと過冷却状態
の残留メーステナイトが存在するので、この両者が安定
状態に移ろうとする川向があり、こ１ｔに伴って寸法変
化がおこる。すなわち、マルテンーリ°イトの分解によ
る収縮と残留オーステナイトのマルテンーリ°イト化に
よる膨張とである。このような変化ｔよ主として＠度と
時間の影響を受けて進行し１．一般にＵ時効現象とよば
れている。Since hardened steel contains marten Inoids as a supersaturated solid solution and residual mastenite in a supercooled state, there is a tendency for both to shift to a stable state, and a dimensional change occurs as a result of this 1t. That is, contraction due to decomposition of martenrite and expansion due to conversion of retained austenite to martenrite. Such changes progress mainly under the influence of degree and time.1. This is generally called the U-aging phenomenon.
押出ピンの使用中の作票温度が／ｇθ〜コθθ℃の場合
には、この時効現象は、かなり速やかに進行する。した
がって、残留オーステナイトのマルテン゛す゛イト化に
よる膨張を防ぐためには、サブゼロ処理によって残留オ
ーステナイト量ヲ皆無にすることが必要である。この際
、ザブゼロ処理温度が一６θ°Ｃよりも高い場合には、
残留オーステナイトの分解が不十分であり、またー／り
４℃以下にすることは、実用的には困難であるので、′
ｖプゼロ処理温度としては、−６θ°Ｃ〜−／ワ乙℃に
限定した。If the printing temperature of the extrusion pin during use is /gθ to θθ°C, this aging phenomenon progresses fairly quickly. Therefore, in order to prevent the retained austenite from expanding due to martennitization, it is necessary to completely eliminate the amount of retained austenite through sub-zero treatment. At this time, if the Zabuzero treatment temperature is higher than 16θ°C,
The decomposition of retained austenite is insufficient and it is practically difficult to reduce the temperature to below 4°C.
The vpzero treatment temperature was limited to -6θ°C to −/wao°C.
つぎに、使用中、マルデンーリ゛イトの分解による収縮
を防ぐためＫは、あらかじめ使用温ｔｙよりも高い温度
で焼もどし処理を行なう必要があるが。Next, in order to prevent shrinkage due to decomposition of the maldenite during use, K must be tempered in advance at a temperature higher than the operating temperature ty.
この際１．２３θ°Ｃ未満では、組織の安定化が不十分
で、使用中に押出ピンが収縮し、ｔたλｇθ°Ｃをこえ
ると焼もどし硬さが低くなるので、焼もどし温度として
は、、２３θ〜２に６℃に限定した。At this time, if the temperature is less than 1.23θ°C, the structure will not be sufficiently stabilized and the ejector pin will shrink during use, and if it exceeds λgθ°C, the tempering hardness will decrease. ,, 23θ~2 was limited to 6°C.
本発明の押出ピンを構成する鋼ｔ」、に３θ℃油冷後、
！ｊθ゛Ｃで焼もどすと、硬さは１４ＢＱ３；にに低下
して耐摩耗性不足を生ずるが、ザブゼロ処理を行なうと
、残留オーステナイトのマルテン′リイト化によって、
焼入硬さが１ｌｆｉｏ／〜３上昇するので１．！ｊθ℃
焼もどし硬さも、ＩＩ、ｌｏｇθ以上を確ｆデすること
ができる。たとえば、０／、θθ係、Ｓｉθ、＝２９
％ 、 へ４ｎ θ、４１０ ％ 、Ｏｒ／、＜〆
ざ 係 の州は 、 ざ、７θ°Ｃ油焼入の状態では
、約／３チの残留オーステナイトを含有し、焼入硬さｔ
ｉｔ １Ｉｎ０６！、 、！；であるが、−７θ°Ｃザ
ブゼロ処叩によって残留オーステナイトはθチとなり、
硬さは１Ｉｎｏ乙７に上昇する。After cooling with oil at 3θ℃,
! When tempered at jθ゛C, the hardness decreases to 14BQ3; resulting in insufficient wear resistance, but when ZubZero treatment is performed, the residual austenite becomes martenite,
The quenching hardness increases by 1lfio/~3, so 1. ! jθ℃
It is also possible to ensure that the tempering hardness is greater than II, log θ. For example, 0/, θθ coefficient, Siθ, = 29
%, to4n θ, 410%, Or/, <〆
When quenched in oil at 7θ°C, it contains about 1/3 inch of retained austenite and has a quenching hardness of t.
it 1In06! , ,! ; However, due to -7θ°C subzero treatment, the retained austenite becomes θchi,
The hardness increases to 1 Ino Otsu 7.
こｒＬを、２Ｓθ℃に焼もどしたときの硬さは、 Ｈｎ
Ｏ乙／を示した。The hardness when this rL is tempered to 2Sθ℃ is Hn
It showed Otsu/.
つぎに本発明の効果を実施例によって説明する。Next, the effects of the present invention will be explained by examples.
第１表は１本発明押出ピンと従来製押出ピンの化学組成
を示す。表中、記号へは本発明押出ピンを、また記号Ｂ
けＳＫＳ、２／押出ピンを示す。また％第２表は押出ピ
ンにほどこした熱処理ならびに熱処理硬さを示す。Table 1 shows the chemical compositions of the extrusion pin of the present invention and the conventional extrusion pin. In the table, the symbol B indicates the extrusion pin of the present invention, and the symbol B
keSKS, 2/ shows the ejector pin. Table 2 shows the heat treatment applied to the extrusion pin and the hardness of the heat treatment.
＠／表化学成分
第３表け、３．θφ×／３−θ咽の本発明押出ピンＳＫ
Ｓ、ｌ！／［１押出ピンを用い、プラスデックを作条温
度／ｇθ〜）００℃で射出成ｆζりし７た場合、２θθ
θθシヨツト後の押出ピンのτＪ゛法変比変化したもの
であり、記号口のＳＫＳ、２／押出ビンがθ、θ／乙胴
の膨張を示したのにだいし、記号Ａの本発明押出ピンけ
ｔＪ゛法変化はθであり１本発明押出ピンの＝Ｊ−法安
定性の優才していることケ示す。＠／Table chemical components 3rd table, 3. θφ×/3-θ extrusion pin SK of the present invention
S, l! /[1 When using an extrusion pin and injection molding fζ of Plus Deck at 00℃, 2θθ
The extrusion pin of the present invention with the symbol A has a τJ modulus ratio change after the θθ shot. The change in J-method is θ, which shows that the extrusion pin of the present invention has superior stability in the J-method.
第３表 押出ピンの寸法変化
つぎに、第９表は、第−表に示した熱処理をほどこした
試験片を用い、１（！さ１ｌｎＢりθのＳ Ｋ ４焼鈍
材を相手材として、大越式摩耗試験機により摩耗試験を
行ない、各摩擦速度における比摩耗量金求めたもので、
記号へは記号Ｂとほとんど同ｆｉ！度の耐摩耗性を有す
ることがわかる。Table 3: Dimensional changes in extruded pins Next, Table 9 shows how the heat-treated test pieces shown in Table 1 were used, and the Ogoe A wear test was conducted using a type abrasion tester, and the specific wear amount at each friction speed was determined.
The symbol is almost the same as symbol B! It can be seen that it has a high degree of wear resistance.
第９表 摩耗試験結果 以上説明したように、本発明押出ピンは、重量。Table 9 Wear test results As explained above, the extrusion pin of the present invention has a large weight.
チで０θ、タ θ〜／、／ θチ、 Ｓｉ θ、／θ
〜θ、３５％。Chi is 0θ, Ta θ~/, /θ Chi, Si θ, /θ
~θ, 35%.
Ｍｎθ、／θ〜θ、ＳＯ＠、Ｏｒ ／、、、２θ〜７．
６θチ残部鉄および不純物よりなる鋼の棒拐ヲ所定の形
状に加工したのち、ざ０６〜ｇ５０℃から焼入後、−６
θ〜−７９６℃でサブゼロ処理をし、ひきつづき、２３
θ〜、２ｇθ°Ｃで焼もどし処理ｔはどこしたことを特
長とするものであり、寸法安定性が優れており、／ｇθ
〜λθθ゛（：の作？６温度のプラスチック金型用に使
用しても＝Ｊ″法変比変化無であり、ｔた面１摩耗性も
ＳＫＳ 、２ ／製押出ビンと同等であり、しかも価格
が安いきいう長所を有するものである。Mnθ, /θ~θ, SO@, Or /, , 2θ~7.
After processing a steel bar made of 6θ chi and remaining iron and impurities into a predetermined shape, it is quenched from 06 to 50°C, then heated to -6
Sub-zero treatment at θ~-796℃, followed by 23
It is characterized by being tempered at θ~, 2gθ°C, has excellent dimensional stability, and /gθ
〜λθθ゛(:) Even when used for a plastic mold at a temperature of 6, there is no change in the =J'' modulus ratio, and the surface 1 abrasion resistance is the same as that of an extrusion bottle made by SKS, 2/. Moreover, it has the advantage of being inexpensive.
代卯人弁理士 井 沢 淘。Representative Uto patent attorney Tadashi Izawa.
Claims (1)
０．３５％、Ｍｎ θ、／θ〜θ、３．３％、ｏｒ ／
、、２θ〜／、乙θチ残部を鉄および不純物よりなる鋼
の神社を、所定の形状に加工したのち１ｇθθ〜ｇ乙θ
°Ｃから焼入後、−６θ〜−／り乙°Ｃで・す゛プゼロ
処理し、ひきつづき、２３θ〜、２１ｒθ°Ｃで焼もど
し処理を施すことを特徴とするプラスチック用押出ピン
。Weight Wc%, 0θ, 9θ~/, /θ%, 8iθ, /θ~
0.35%, Mn θ, /θ~θ, 3.3%, or /
,,2θ~/, After processing a steel shrine whose remaining part is made of iron and impurities into a predetermined shape, 1gθθ~gOtsuθ
An extruded pin for plastics, characterized in that after being quenched from 0°C, it is subjected to a dip zero treatment at -6θ to -/20°C, and subsequently tempered at 23θ to 21rθ°C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13601782A JPS5926211A (en) | 1982-08-04 | 1982-08-04 | Extrusion pin for plastic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13601782A JPS5926211A (en) | 1982-08-04 | 1982-08-04 | Extrusion pin for plastic |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5926211A true JPS5926211A (en) | 1984-02-10 |
| JPH0213010B2 JPH0213010B2 (en) | 1990-04-03 |
Family
ID=15165232
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13601782A Granted JPS5926211A (en) | 1982-08-04 | 1982-08-04 | Extrusion pin for plastic |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5926211A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57110622A (en) * | 1980-12-27 | 1982-07-09 | Daido Steel Co Ltd | Production of steel strip |
-
1982
- 1982-08-04 JP JP13601782A patent/JPS5926211A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57110622A (en) * | 1980-12-27 | 1982-07-09 | Daido Steel Co Ltd | Production of steel strip |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0213010B2 (en) | 1990-04-03 |
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