JP4124191B2 - 射出スクリュ - Google Patents
射出スクリュ Download PDFInfo
- Publication number
- JP4124191B2 JP4124191B2 JP2004277188A JP2004277188A JP4124191B2 JP 4124191 B2 JP4124191 B2 JP 4124191B2 JP 2004277188 A JP2004277188 A JP 2004277188A JP 2004277188 A JP2004277188 A JP 2004277188A JP 4124191 B2 JP4124191 B2 JP 4124191B2
- Authority
- JP
- Japan
- Prior art keywords
- screw
- resin
- injection
- flight
- supply
- 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 - Lifetime
Links
- 238000002347 injection Methods 0.000 title claims description 36
- 239000007924 injection Substances 0.000 title claims description 36
- 230000006835 compression Effects 0.000 claims description 13
- 238000007906 compression Methods 0.000 claims description 13
- 238000005259 measurement Methods 0.000 claims description 13
- 229920000642 polymer Polymers 0.000 claims description 12
- 229920010524 Syndiotactic polystyrene Polymers 0.000 claims description 10
- 229920001576 syndiotactic polymer Polymers 0.000 claims description 9
- 238000009751 slip forming Methods 0.000 claims 1
- 229920005989 resin Polymers 0.000 description 45
- 239000011347 resin Substances 0.000 description 45
- 239000000463 material Substances 0.000 description 38
- 238000010438 heat treatment Methods 0.000 description 16
- 239000008188 pellet Substances 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 11
- 229920005990 polystyrene resin Polymers 0.000 description 5
- 229920006127 amorphous resin Polymers 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 230000010006 flight Effects 0.000 description 4
- 238000001746 injection moulding Methods 0.000 description 4
- 230000033001 locomotion Effects 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 239000000956 alloy Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229920005992 thermoplastic resin Polymers 0.000 description 3
- 238000005303 weighing Methods 0.000 description 3
- 239000004793 Polystyrene Substances 0.000 description 2
- 229920006125 amorphous polymer Polymers 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 229920001400 block copolymer Polymers 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 229920006038 crystalline resin Polymers 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 229920000578 graft copolymer Polymers 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
Images
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
Description
スクリュ溝深さ(hf) hf/D=0.14〜0.17、
スクリュフライト後面曲率半径(R) R/hf=1.47〜2.1、
スクリュフライト前面曲率半径(r) r/hf=0.63〜0.88、
の範囲に設定されており、その範囲であれば材料樹脂がシンジオタクチックポリマーによるものであっても、射出スクリュへの付着が減少して材料食い込み不良が生じ難くなり、材料計量が安定して行われようになる。なお、計量部mのスクリュ溝深さは、hm/D=0.05〜0.08に設定してある。
実施例1 比較例
hf/D 0.1696 0.1330
R/hf 1.4737 0.9396
r/hf 0.6316 0.4698
材料樹脂 XAREC DW142 出光興産株式会社製
ショット数 実施例1 222回 比較例 104回
計量時間(sec) 最大時間 最小時間 バラツキ時間
実施例1 3.36 3.26 0.10
比較例 14.26 3.83 10.43
但し、スクリュ回転数 45rpm
実施例1 2800ショット
比較例 10〜15ショット
2 加熱筒
3 バンドヒータ
11 スクリュフライト
12 スクリュ溝
D スクリュ外径
P スクリュ溝のピッチ
hm 計量部スクリュ溝深さ
hf 供給部スクリュ溝深さ
R スクリュフライト後面曲率半径
r スクリュフライト前面曲率半径
Claims (3)
- スクリュ有効長さの後端から先端までを順に供給部f、圧縮部c、計量部mに区画して、その各部にわたりスクリュフライトを連続形成し、供給部fにおけるスクリュフライトの後面を曲面に形成したシンジオタクチックポリマー用の射出スクリュであって、
スクリュ外径Dと供給部スクリュ溝深さhfとの比を、hf/D=0.14〜0.17、
スクリュフライト後面とスクリュ溝底面との間の曲率半径Rと、供給部スクリュ溝深さhfとの比を、R/hf=1.47〜2.1、
スクリュフライト前面とスクリュ溝底面との間の曲率半径rと、供給部スクリュ溝深さhfとの比を、r/hf=0.63〜0.88、
に設定してなることを特徴とする射出スクリュ。 - 上記請求項1記載の射出スクリュにおいて、上記スクリュフライトのスクリュ溝ピッチPとスクリュ外径Dの比はP/D=1からなることを特徴とする射出スクリュ。
- 上記シンジオタクチックポリマーは、シンジオタクチックポリスチレンポリマーであることを特徴とする請求項1記載の射出スクリュ。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004277188A JP4124191B2 (ja) | 2004-09-24 | 2004-09-24 | 射出スクリュ |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004277188A JP4124191B2 (ja) | 2004-09-24 | 2004-09-24 | 射出スクリュ |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2006088533A JP2006088533A (ja) | 2006-04-06 |
JP2006088533A5 JP2006088533A5 (ja) | 2006-05-25 |
JP4124191B2 true JP4124191B2 (ja) | 2008-07-23 |
Family
ID=36229956
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2004277188A Expired - Lifetime JP4124191B2 (ja) | 2004-09-24 | 2004-09-24 | 射出スクリュ |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP4124191B2 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4311648A1 (en) | 2022-07-25 | 2024-01-31 | Nissei Plastic Industrial Co., Ltd. | Injection screw for rigid vinyl chloride |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI405657B (zh) * | 2007-02-09 | 2013-08-21 | Sumitomo Heavy Industries | Screw and injection device |
JP5055480B2 (ja) * | 2008-05-23 | 2012-10-24 | 日精樹脂工業株式会社 | 射出スクリュ |
JP2015110293A (ja) * | 2013-12-06 | 2015-06-18 | 三井化学株式会社 | 環状オレフィン系樹脂成形体の製造方法 |
DE102017108470B3 (de) * | 2017-04-20 | 2018-05-24 | Kraussmaffei Technologies Gmbh | Einschnecken-Plastifiziereinheit und Spritzgießmaschine mit einer Einschnecken-Plastifiziereinheit |
-
2004
- 2004-09-24 JP JP2004277188A patent/JP4124191B2/ja not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4311648A1 (en) | 2022-07-25 | 2024-01-31 | Nissei Plastic Industrial Co., Ltd. | Injection screw for rigid vinyl chloride |
JP7503601B2 (ja) | 2022-07-25 | 2024-06-20 | 日精樹脂工業株式会社 | 硬質塩化ビニル用射出スクリュー |
Also Published As
Publication number | Publication date |
---|---|
JP2006088533A (ja) | 2006-04-06 |
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