JPH0129133B2 - - Google Patents
Info
- Publication number
- JPH0129133B2 JPH0129133B2 JP59035014A JP3501484A JPH0129133B2 JP H0129133 B2 JPH0129133 B2 JP H0129133B2 JP 59035014 A JP59035014 A JP 59035014A JP 3501484 A JP3501484 A JP 3501484A JP H0129133 B2 JPH0129133 B2 JP H0129133B2
- Authority
- JP
- Japan
- Prior art keywords
- seizure
- hardness
- extrusion pin
- resistance
- 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.)
- Expired
Links
- 238000001125 extrusion Methods 0.000 claims description 13
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 238000007733 ion plating Methods 0.000 claims description 4
- 238000010791 quenching Methods 0.000 claims description 4
- 230000000171 quenching effect Effects 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000005496 tempering Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 2
- 239000012535 impurity Substances 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims 2
- 229910052742 iron Inorganic materials 0.000 claims 1
- 230000000694 effects Effects 0.000 description 8
- 230000007423 decrease Effects 0.000 description 5
- 239000011152 fibreglass Substances 0.000 description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 3
- 150000001247 metal acetylides Chemical class 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000007774 longterm Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000010137 moulding (plastic) Methods 0.000 description 2
- 239000002436 steel type Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 229910052720 vanadium Inorganic materials 0.000 description 2
- 229910001566 austenite Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 238000004554 molding of glass Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000002990 reinforced plastic Substances 0.000 description 1
- 238000004381 surface treatment 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/475—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using pistons, accumulators or press rams
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Physical Vapour Deposition (AREA)
Description
本発明は、ガラス繊維入り強化プラスチツクを
高圧、高速で成形する場合に使用される耐焼付性
の優れた押出ピンに関するものである。
プラスチツクの成形装置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、長時間使用中に寸法変化を生じないこと、耐
摩耗性が大きいことのほかに、摺動面の耐焼付性
の良好なことが要求される。
従来、一般用プラスチツク押出ピンとしては、
SKS21をHRC60前後の硬さに調質したものが広く
用いられているが、ガラス繊維入り強化プラスチ
ツクの場合には、耐摩耗性が不足するので、主と
して、SKD11またはSKH9製押出ピンが用いら
れている。
しかし、最近は、ガラス繊維入り強化プラスチ
ツクを高圧、高速で成形する傾向にあり、このよ
うな場合には、SKD11、SKH9製押出ピンでは、
焼付を生じやすい欠点がある。
本発明は、これらの問題に鑑みてなされたもの
であり、SKH9製押出ピンの耐焼付性の向上をは
かり、ガラス繊維入り強化プラスチツクを高圧・
高速成形する場合に適した押出ピンを提供するこ
とを目的とするものである。
SKH9製押出ピンは、C0.85％、Cr4％、Mo5
％、W6％、V2％の化学成分を有し、1100〜1200
℃から焼入れを行なつた後、560〜580℃で焼もど
しをほどこしてHRC60前後の硬さで使用され、優
れた耐摩耗性と靭性をかね具えている。また高温
焼もどしを行つているため、プラスチツクの成形
温度が200℃以上に高い場合でも、長時間使用後
の寸法変化が皆無であるという特徴を有する。
なお、とくに細物押出ピンの場合には、靭性の
大きいことを要求されるので、SKH9のＣを低く
し、Ｗ、Ｖも若干少なくした鋼種、すなわち、
C0.55％、Cr4％、Mo4％、W2％、V1％の鋼が、
好適である。
本発明者は、SKH9ならびに低炭素型SKH9製
押出ピンの耐焼付性の向上をはかるため、表面処
理について種々実験を行なつた結果、これらの鋼
種の押出ピンに、イオン・プレーテイングによつ
て窒化チタンの皮膜を被覆させることにより、摩
擦抵抗が著しく小さくなり、耐焼付性も著しく向
上することを発見したものである。
次に、本発明押出ピンの鋼の棒材に関する組成
限定理由を述べる。Ｃはマルテンサイトの硬さを
高め、Cr、Ｗ、Mo、Ｖと結合して硬い炭化物を
形成して耐摩耗性を向上するが、Ｃが0.45％未満
では耐摩耗性が不足し、またＣが0.90％をこえる
と靭性が低下するので、0.45〜0.90％とした。Si
は脱酸剤として添加するが、0.1％未満ではその
効果少なく、また0.5％をこえると靭性を低下す
るので0.1〜0.5％とした。Mnも脱酸効果を有す
るが、0.1％未満ではその効果少なく、0.6％をこ
えると焼入時の残留オーステナイトが多くなるの
で、0.1〜0.6％とした。Crは焼入性を大きくする
が、3.5％未満ではその効果少なく、また5.0％を
こえると靭性が低下するので、3.5〜5.0％とし
た。Moは焼入性を大きくし、焼もどし軟化抵抗
を高め、また耐摩耗性を大きくするが、3.5％未
満ではその効果少なく、また6.0％をこえても効
果の向上が小さいので、3.0〜6.0％とした。Ｗも
炭化物を形成して耐摩耗性を向上するが、1.0％
未満ではその効果少なく、また7.0％をこえると
靭性が低下するので、1.0〜7.0％とした。Ｖも特
殊炭化物を形成して耐摩耗性を向上するが、0.6
％未満ではその効果少なく、また2.0％をこえる
と靭性が低下するので、0.6〜2.0％に限定した。
以下、実施例によつて本発明を具体的に説明す
る。
The present invention relates to an extrusion pin with excellent seizure resistance that is used when molding glass fiber reinforced plastics at high pressure and high speed. As an extrusion pin for plastic molding equipment,
In addition to having sufficient toughness to avoid breakage during use, no dimensional changes during long-term use, and high wear resistance, the sliding surface must have good seizure resistance. . Conventionally, general-purpose plastic extrusion pins include:
SKS21 tempered to a hardness of around H R C60 is widely used, but in the case of glass fiber reinforced plastics, the wear resistance is insufficient, so extruded pins made of SKD11 or SKH9 are mainly used. It is being However, recently there has been a trend to mold glass fiber reinforced plastics at high pressure and high speed, and in such cases, extruded pins made of SKD11 and SKH9
It has the disadvantage of being prone to seizure. The present invention was made in view of these problems, and aims to improve the seizure resistance of SKH9 extrusion pins, and to improve the seizure resistance of glass fiber-containing reinforced plastics under high pressure.
The purpose of this invention is to provide an extrusion pin suitable for high-speed molding. SKH9 extruded pin is C0.85%, Cr4%, Mo5
%, W6%, V2% chemical composition, 1100-1200
After quenching from ℃ to 560-580℃, it is used to a hardness of around H R C60, and has excellent wear resistance and toughness. Furthermore, since high-temperature tempering is performed, there is no dimensional change after long-term use, even when the plastic molding temperature is over 200°C. In addition, especially in the case of thin extruded pins, high toughness is required, so a steel type with lower C and slightly lower W and V than SKH9, that is,
Steel with C0.55%, Cr4%, Mo4%, W2%, V1% is
suitable. In order to improve the seizure resistance of SKH9 and low-carbon type SKH9 extruded pins, the inventor conducted various experiments on surface treatments, and found that ion plating was applied to extruded pins of these steel types. It has been discovered that coating with a titanium nitride film significantly reduces frictional resistance and significantly improves seizure resistance. Next, the reasons for limiting the composition of the steel bar of the extrusion pin of the present invention will be described. C increases the hardness of martensite and combines with Cr, W, Mo, and V to form hard carbides and improves wear resistance, but if C is less than 0.45%, wear resistance is insufficient, and C If it exceeds 0.90%, the toughness decreases, so it was set at 0.45 to 0.90%. Si
is added as a deoxidizing agent, but if it is less than 0.1%, its effect is small, and if it exceeds 0.5%, the toughness decreases, so it was set at 0.1 to 0.5%. Mn also has a deoxidizing effect, but if it is less than 0.1%, the effect is small, and if it exceeds 0.6%, residual austenite will increase during quenching, so it is set at 0.1 to 0.6%. Cr increases hardenability, but if it is less than 3.5%, the effect is small, and if it exceeds 5.0%, toughness decreases, so it is set to 3.5 to 5.0%. Mo increases hardenability, temper softening resistance, and wear resistance, but if it is less than 3.5%, the effect is small, and if it exceeds 6.0%, the improvement in effect is small. %. W also forms carbides and improves wear resistance, but at 1.0%
If it is less than 7.0%, the effect will be small, and if it exceeds 7.0%, the toughness will decrease, so it is set at 1.0 to 7.0%. V also forms special carbides to improve wear resistance, but 0.6
If it is less than 2.0%, the effect will be small, and if it exceeds 2.0%, the toughness will decrease, so it was limited to 0.6 to 2.0%. Hereinafter, the present invention will be specifically explained with reference to Examples.
【表】
第１表は、押出ピンの化学組成を示す。記号Ａ
およびＢは本発明に係る押出ピン、記号Ｃは
SKD11製押出ピンである。[Table] Table 1 shows the chemical composition of the extrusion pin. Symbol A
and B are extrusion pins according to the present invention, symbol C is
This is an extrusion pin made of SKD11.
【表】
第２表は、熱処理硬さ、表面皮膜硬さおよび焼
付荷重の比較を行なつたものである。すなわち、
押出ピンと同一条件で熱処理した８mm角試片に、
イオン・プレーテイングによるTiNコーテイン
グを行ない、50mmφのSUS304製リングに試片を
押付け、無潤滑、一定速度で荷重を増加させたと
きのトルクの急激増加の荷重を焼付時荷重として
測定したものである。TiN皮膜の表面硬さは
Hv1800、皮膜厚さは5μとした。この焼付荷重
（Kg）の大きいほど、耐焼付性が優れていること
を示す。第２表から記号ＡおよびＢのTiN皮膜
品は、皮膜なしのものにくらべて、焼付荷重が約
５倍に大きくなつており、耐焼付性が、著しく向
上したことがわかる。
以上、説明したごとく、本発明は、重量％で、
C0.45〜0.90％、Si0.1〜0.5％、Mn0.1〜0.6％、
Cr3.5〜5.0％、Mo3.5〜6.0％、W1.0〜7.0％、
V0.6〜2.0％、残部および若干の不純物からなる
鋼の棒材を所定の形状に加工し、焼入・焼もどし
の熱処理をほどこして、HRC60前後の硬さにした
のち、押出ピンの少なくとも摺動外周面にイオ
ン・プレーテイングによる窒化チタン皮膜を被覆
させたものであり、耐焼付性、耐摩耗性ならびに
靭性も良好なため、ガラス繊維入り強化プラスチ
ツクの高圧、高速成形用押出ピンとして好適のも
のである。[Table] Table 2 shows a comparison of heat treatment hardness, surface film hardness, and baking load. That is,
An 8 mm square specimen was heat treated under the same conditions as the extrusion pin.
A sample was applied with TiN coating by ion plating and pressed against a 50mmφ SUS304 ring, and the load at which the torque suddenly increased when the load was increased at a constant speed without lubrication was measured as the load at seizure. . The surface hardness of TiN film is
Hv1800, film thickness was 5μ. The larger the seizure load (Kg), the better the seizure resistance. From Table 2, it can be seen that the TiN coated products with symbols A and B had a seizure load about 5 times greater than those without a film, indicating that the seizure resistance was significantly improved. As explained above, the present invention, in weight%,
C0.45~0.90%, Si0.1~0.5%, Mn0.1~0.6%,
Cr3.5~5.0%, Mo3.5~6.0%, W1.0~7.0%,
A steel bar consisting of V0.6~2.0%, the balance and some impurities is processed into a specified shape, heat treated by quenching and tempering to a hardness of around H R C60, and then extruded into a pin. At least the outer sliding surface of the pin is coated with a titanium nitride film by ion plating, and has good seizure resistance, wear resistance, and toughness, making it suitable for extrusion pins for high-pressure, high-speed molding of glass fiber reinforced plastics. It is suitable as
Claims (1)
Mn0.1〜0.6％、Cr3.5〜5.0％、Mo3.5〜6.0％、
W1.0〜7.0％、V0.6〜2.0％、残部鉄および若干の
不純物からなる鋼の棒材を所定の形状に加工し、
焼入・焼もどしの熱処理をほどこして、HRC60前
後の硬さにしたのち、押出ピンの少なくとも摺動
外周面にイオン・プレーテイングによる窒化チタ
ン皮膜を被覆させたことを特徴とする耐焼付性の
優れた押出ピン。1% by weight, C0.45-0.90%, Si0.1-0.5%,
Mn0.1~0.6%, Cr3.5~5.0%, Mo3.5~6.0%,
A steel bar consisting of W1.0~7.0%, V0.6~2.0%, the balance iron and some impurities is processed into a predetermined shape,
A seizure-resistant product characterized by having undergone heat treatment through quenching and tempering to achieve a hardness of around H R C60, and then coating at least the outer sliding surface of the extrusion pin with a titanium nitride film by ion plating. An extrusion pin with excellent properties.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59035014A JPS60178017A (en) | 1984-02-25 | 1984-02-25 | Push out pin excellent in anti-seizing property |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59035014A JPS60178017A (en) | 1984-02-25 | 1984-02-25 | Push out pin excellent in anti-seizing property |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60178017A JPS60178017A (en) | 1985-09-12 |
| JPH0129133B2 true JPH0129133B2 (en) | 1989-06-08 |
Family
ID=12430213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59035014A Granted JPS60178017A (en) | 1984-02-25 | 1984-02-25 | Push out pin excellent in anti-seizing property |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60178017A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021065090A1 (en) | 2019-10-02 | 2021-04-08 | Smc株式会社 | High-pressure fluid discharge device |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6394813A (en) * | 1986-10-09 | 1988-04-25 | Kanegafuchi Chem Ind Co Ltd | Magnetic field orientation extruder |
| CN101403120A (en) * | 2008-09-23 | 2009-04-08 | 宋存科 | Anti-pressure and abrasion-proof stainless steel processing technique |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4839356U (en) * | 1971-09-14 | 1973-05-16 | ||
| JP2547782B2 (en) * | 1987-07-24 | 1996-10-23 | 日本電信電話株式会社 | Norm calculator |
-
1984
- 1984-02-25 JP JP59035014A patent/JPS60178017A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021065090A1 (en) | 2019-10-02 | 2021-04-08 | Smc株式会社 | High-pressure fluid discharge device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60178017A (en) | 1985-09-12 |
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