JPS62284718A - Screw for molder - Google Patents
Screw for molderInfo
- Publication number
- JPS62284718A JPS62284718A JP61129541A JP12954186A JPS62284718A JP S62284718 A JPS62284718 A JP S62284718A JP 61129541 A JP61129541 A JP 61129541A JP 12954186 A JP12954186 A JP 12954186A JP S62284718 A JPS62284718 A JP S62284718A
- Authority
- JP
- Japan
- Prior art keywords
- screw
- flight
- land
- cylinder
- wall surface
- 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
- 239000011347 resin Substances 0.000 claims abstract description 13
- 229920005989 resin Polymers 0.000 claims abstract description 13
- 230000001050 lubricating effect Effects 0.000 claims abstract description 10
- 238000000465 moulding Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract description 2
- 238000005461 lubrication Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000010006 flight Effects 0.000 description 4
- 239000002994 raw material Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000007787 solid 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
- 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
- B29C48/50—Details of extruders
- B29C48/505—Screws
- B29C48/53—Screws having a varying channel depth, e.g. varying the diameter of the longitudinal screw trunk
-
- 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
- B29C48/50—Details of extruders
- B29C48/505—Screws
- B29C48/56—Screws having grooves or cavities other than the thread or the channel
-
- 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
- B29C48/50—Details of extruders
- B29C48/505—Screws
- B29C48/59—Screws characterised by details of the thread, i.e. the shape of a single thread of the material-feeding screw
- B29C48/60—Thread tops
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
Description
【発明の詳細な説明】
３、発明の詳細な説明
（産業上の利用分野）
本発明は押出機、射出成形機、二軸押出機、食品用押出
機に用いられる成形機用スクリュに関するものである。[Detailed Description of the Invention] 3. Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a screw for a molding machine used in an extruder, an injection molding machine, a twin-screw extruder, or a food extruder. be.
（従来の技術）
一般に成形機用スクリュは種々の原料樹脂に対し、様々
な運転状況のもとて原料を溶融し、均質に混練、分散し
て安定して押出すことが要求される。従来の一般的な成
形機用スクリュを第１１図に示すと、このスクリュは樹
脂可塑化過程の固体輸送区間Ａ、可塑化区間Ｂ、計量区
間Ｃに大きく分けられる。普通、スクリュのこれらの区
間は、第１２図および第１３図（スクリュの展開図）に
示すように、円柱状のスクリュ本体ｌに螺旋状に、１本
または複数のフライト２が設けられたフルフライトスク
リュが用いられる。またバリヤスクリュやダルメージ型
スクリュ等の、フルフライトとは呼ばれないスクリュで
も、樹脂の通る溝を形成するとともに、スクリュ本体を
シリンダ壁面で支えるようにフライト状の突起を有して
いる。そして従来は、このフライトやフライト状突起（
以下フライト）の頂部は、周方向に同一の円筒面で構成
されていた。(Prior Art) In general, screws for molding machines are required to melt, homogeneously knead, disperse, and stably extrude various raw material resins under various operating conditions. When a conventional general screw for a molding machine is shown in FIG. 11, this screw is roughly divided into a solid transportation section A, a plasticization section B, and a metering section C during the resin plasticization process. Usually, these sections of the screw are full screws with one or more flights 2 arranged helically around the cylindrical screw body l, as shown in Figures 12 and 13 (expanded view of the screw). A flight screw is used. Further, even screws that are not called full flight, such as barrier screws and dalmage type screws, have grooves through which the resin passes and also have flight-like protrusions so that the screw body is supported on the cylinder wall surface. Conventionally, this flight or flight-like protrusion (
The top of the flight (hereinafter referred to as flight) was composed of a cylindrical surface that was uniform in the circumferential direction.
ところで従来形状のフライトでは、原料樹脂の種類や成
形機の運転状況によってはシリンダ内のスクリュ挙動が
変化し、フライト頂部とシリンダ壁面における潤滑作用
がきわめて悪くなる。即ら、スクリュの回転周期の約２
の周期で、スクリュが偏芯したまま旋回するという現象
が生じることがあり、このとき従来形状のフライトでは
、フライト頂部とシリンダ壁間には潤滑圧力が殆んど発
生しなくなる。従ってフライト頂部とシリンダ壁面とが
直接接触して摩耗が発生することが多かった。そのため
に、スクリュやシリンダの損傷、押出物の劣化等を引き
起こすなどにより安定した押出運転ができなかった。However, in conventionally shaped flights, the behavior of the screw inside the cylinder changes depending on the type of raw material resin and the operating conditions of the molding machine, and the lubrication effect at the top of the flight and the cylinder wall becomes extremely poor. That is, approximately 2 of the rotation period of the screw.
A phenomenon may occur in which the screw rotates eccentrically at a period of , and at this time, with conventionally shaped flights, almost no lubricating pressure is generated between the top of the flight and the cylinder wall. Therefore, the top of the flight and the cylinder wall often come into direct contact, causing wear. As a result, stable extrusion operation was not possible due to damage to the screw and cylinder, deterioration of the extrudate, etc.
（発明が解決しようとする問題点）
従来の押出機用スクリュでは、原料樹脂の種類や運転状
況によっては、スクリュ挙動が変化して潤滑作用が極め
て悪くなり、摩耗が発生し、シリンダが損傷する等の問
題があった。本発明はこれらの問題点を解決するために
提案されたものである。(Problems to be solved by the invention) In conventional screws for extruders, depending on the type of raw material resin and operating conditions, the screw behavior changes and the lubrication effect becomes extremely poor, causing wear and damage to the cylinder. There were other problems. The present invention was proposed to solve these problems.
（問題点を解決するための手段）
このため本発明は、スクリュ回転時にスクリュフライト
頂部がシリンダ壁面と接触しないように、スクリュフラ
イト頂部にランド部を設けて熔融樹脂で潤滑圧力を発生
させるようにしてなるもので、これを問題点解決のため
の手段とするものである。(Means for solving the problem) Therefore, in the present invention, a land portion is provided at the top of the screw flight to generate lubricating pressure with molten resin so that the top of the screw flight does not come into contact with the cylinder wall surface when the screw rotates. This is a means to solve problems.
（作用）
スクリュフライト頂部にランド部を設けることにより、
通常状況下での潤滑能力を損なうことなく、従来の周方
向に同一の円筒面で構成されるフライト頂部形状では潤
滑圧が発生しにくいスクリュ挙動下でも、フライト頂部
とシリンダ壁面の最近接点付近で相対的に大きな潤滑圧
力が発生し、フライト頂部とシリンダ壁面の接触を防止
することができる。(Function) By providing a land portion at the top of the screw flight,
Without impairing the lubrication ability under normal conditions, even under screw behavior where it is difficult to generate lubrication pressure with the conventional flight top shape consisting of the same cylindrical surface in the circumferential direction, the lubrication ability is maintained near the closest point between the flight top and the cylinder wall. A relatively large lubricating pressure is generated, which can prevent the top of the flight from coming into contact with the cylinder wall.
（実施例）
以下本発明を図面の実施例について説明すると、第１図
は本発明の第１実施例で、第３図または第４図は第１図
のＡ−Ａ断面である。そしてスクリュフライト２には、
第３図に示す如くスクリュの回転方向フライト前面側２
１のフライト頂部に、スクリュ外径口５より若干小さく
、かつ外径口５に対し平行な線にて構成されるランド部
４が設けられている。また第４図は他の実施例であり、
スクリュの回転方向フライト前面側２１のフライト頂部
に、スクリュ外径口５に対し緩やかな傾きをもち、かつ
終端が外径口５につながるランド４′が設けられている
。(Embodiments) The present invention will be described below with reference to embodiments of the drawings. FIG. 1 is a first embodiment of the present invention, and FIG. 3 or 4 is a cross section taken along the line AA in FIG. 1. And in Screw Flight 2,
As shown in Figure 3, the direction of rotation of the screw is the front side of the flight 2.
A land portion 4 that is slightly smaller than the screw outer diameter opening 5 and constituted by a line parallel to the outer diameter opening 5 is provided at the top of the flight 1. Moreover, FIG. 4 shows another embodiment,
A land 4' is provided at the top of the flight on the front side 21 of the flight in the rotational direction of the screw, which has a gentle inclination with respect to the screw outer diameter opening 5 and whose terminal end is connected to the outer diameter opening 5.
スクリュ１は第３図の矢印イの方向に回転する。そして
フライト２が回転してシリンダ壁面３に接触しそうにな
ると、フライト頂部とシリンダ壁面間には、ランド４又
は４′により溶融樹脂による潤滑圧力が発生してフライ
ト２がシリンダ３に接触するのが阻止される。約直径９
０鰭成形機用スクリュにおける実験では、第３図のラン
ド寸法ｈ５が０．５１１程度まで潤滑圧力発生効果が大
きいことを確認している。The screw 1 rotates in the direction of arrow A in FIG. When the flight 2 rotates and is about to come into contact with the cylinder wall 3, lubricating pressure from the molten resin is generated between the top of the flight and the cylinder wall by the land 4 or 4', preventing the flight 2 from coming into contact with the cylinder 3. blocked. Approx. diameter 9
In experiments using screws for zero-fin forming machines, it has been confirmed that the lubricating pressure generation effect is large up to a land dimension h5 of about 0.511 in FIG. 3.
第５図は本発明の第２実施例で、第３図または第４図に
示すランド４又は４′を、スクリュの一部区間のフライ
ト頂部に断続的に設けた場合の側面図である。また第６
図はその展開図である。FIG. 5 is a side view showing a second embodiment of the present invention, in which the lands 4 or 4' shown in FIG. 3 or 4 are provided intermittently at the top of the flights in some sections of the screw. Also the 6th
The figure is a developed view.
第７図は本発明の第３実施例で、フライト頂部は第９図
または第１０図に示すランド形状４ａ。FIG. 7 shows a third embodiment of the present invention, in which the top of the flight has a land shape 4a shown in FIG. 9 or 10.
４ａ’を有しており、スクリュフライトの頂部に断続的
に設けられている。なお、このランド部は、スクリュの
フライト頂部全長にわたって連続的に設けてもよいし、
所要個所のみに断続的又は連続的に設けても差支えない
。4a', and is provided intermittently at the top of the screw flight. Note that this land portion may be provided continuously over the entire length of the flight top of the screw, or
It may be provided intermittently or continuously only at required locations.
第１４図及び第１５図は第９図及び第１０図に示した第
３実施例に類似したランドを有する別の実施例の側面図
と展開図である。即ち、フライト頂部のフライト前面側
２１に凹状のランド部４ａ、４ａ’に通ずる樹脂の流入
溝４０ａを設けた例である。14 and 15 are side and exploded views of another embodiment having lands similar to the third embodiment shown in FIGS. 9 and 10. That is, this is an example in which a resin inflow groove 40a communicating with the concave land portions 4a, 4a' is provided on the flight front side 21 at the top of the flight.
また第１６図及び第１７図は細長く、巾が狭くて浅い溝
からなる複数のランド６を、フライト前面側２１に開口
させて、フライト頂部に設けた更に別の実施例の側面図
と展開図である。Moreover, FIGS. 16 and 17 are a side view and a developed view of yet another embodiment in which a plurality of lands 6 consisting of elongated, narrow and shallow grooves are opened at the front side 21 of the flight and provided at the top of the flight. It is.
（発明の効果）
以上詳細に説明した如く本発明は構成されているので、
従来のフライト形状では潤滑圧が発生しにくいスクリュ
挙動下でも、本発明によるとスクリュ頂部とシリンダ壁
面間で潤滑圧力が発生し、フライト頂部とシリンダ壁面
の接触を防止することができる。その結果種々の樹脂、
様々な運転状況下でも、スクリュ、シリンダの損傷、押
出物の劣化等がなく安定した押出を行なうスクリュが提
供できる。(Effects of the Invention) Since the present invention is configured as explained in detail above,
Even under screw behavior in which lubricating pressure is difficult to generate with conventional flight shapes, according to the present invention, lubricating pressure is generated between the screw top and the cylinder wall, making it possible to prevent the flight top from coming into contact with the cylinder wall. As a result, various resins,
It is possible to provide a screw that performs stable extrusion without damage to the screw or cylinder or deterioration of the extrudate even under various operating conditions.
第１図は本発明の第１実施例のスクリュを示す側面図、
第２図は第１図の展開図、第３図および第４図は第１図
のＡ−Ａ断面図、第５図は本発明の第２実施例のスクリ
ュを示す側面図、第６図は第５図の展開図、第７図は本
発明の第３実施例のスクリュを示す側面図、第８図は第
７図の展開図、第９図および第１０図は第７図のＢ−Ｂ
断面図、第１１図は従来の押出機の一部断面を示す側面
図、第１２図は従来のフルフライトスクリュの側面図、
第１３図は第１２図の展開図、第１４図は本発明の第４
実施例のスクリュを示す側面図、第１５図は第１４図の
展開図、第１６図は本発明の第５実施例のスクリュを示
す側面図、第１７図は第１６図の展開図である。
図の主要部分の説明
１・・・スクリュ
２−フライト
３−・・シリンダ
４．４′・・〜ランド
５・−スクリュ外径円
２１− フライト前面
特 許 出 願 人 三菱重工業株式会社第１図
第３図
第４図
４′
第５図
第７図
第１０図
第 １２図
席１３図
喘１４図
第１５図
り
第１６図
第１７図
手続補正書
昭和６２年５月２５日
特願昭６１−１２９５４１号
２、発明の名称
成形機用スクリュ
３、補正をする者
事件との関係 特許出願人
住 所 東京都千代田区丸の内二丁目５番１号名 称
（６２０） 三菱重工業株式会社４、代理人
住 所 東京都千代田区丸の内二丁目５番１号三菱重工
業株式会社内
氏 名 （６９２４）弁理士 石 川 新 外２名５
、復代理人
補正の内容
１、明細書第５頁第１１行目のｒｏ、５ｍ＋ｍ程度まで
」の記載をｒＯ，５ｍｍ以下（０ｍｍ付近まで）で」と
補正する。
以上FIG. 1 is a side view showing the screw of the first embodiment of the present invention;
FIG. 2 is a developed view of FIG. 1, FIGS. 3 and 4 are sectional views taken along line A-A in FIG. 1, FIG. 5 is a side view showing the screw of the second embodiment of the present invention, and FIG. is a developed view of FIG. 5, FIG. 7 is a side view showing the screw of the third embodiment of the present invention, FIG. 8 is a developed view of FIG. 7, and FIGS. 9 and 10 are B of FIG. -B
A sectional view, FIG. 11 is a side view showing a partial cross section of a conventional extruder, and FIG. 12 is a side view of a conventional full flight screw.
FIG. 13 is a developed view of FIG. 12, and FIG. 14 is a fourth diagram of the present invention.
15 is a side view showing the screw of the embodiment, FIG. 15 is a developed view of FIG. 14, FIG. 16 is a side view showing the screw of the fifth embodiment of the present invention, and FIG. 17 is a developed view of FIG. 16. . Explanation of main parts of the diagram 1... Screw 2 - Flight 3 - Cylinder 4.4'... ~ Land 5 - Screw outer diameter circle 21 - Front of flight Patent Applicant Mitsubishi Heavy Industries, Ltd. Figure 1 Figure 3 Figure 4 4' Figure 5 Figure 7 Figure 10 Figure 12 Seat 13 Figure 14 Figure 15 Figure 16 Figure 17 Procedural amendment May 25, 1988 Patent application 1986- 129541 No. 2, Name of the invention Screw for molding machine 3, Relationship to the case of the person making the amendment Patent applicant address 2-5-1 Marunouchi, Chiyoda-ku, Tokyo Name
(620) Mitsubishi Heavy Industries, Ltd. 4, Agent address: 2-5-1 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Heavy Industries, Ltd. Name (6924) Patent attorney Arata Ishikawa, 2 others 5
, Contents of sub-agent amendment 1, on page 5, line 11 of the specification, amend the statement "ro, up to about 5m+m" to "rO, 5mm or less (up to around 0mm)". that's all
Claims (1)
と接触しないように、スクリュフライト頂部にランド部
を設けて溶融樹脂で潤滑圧力を発生させることを特徴と
する成形機用スクリュ。A screw for a molding machine, characterized in that a land portion is provided at the top of the screw flight to generate lubricating pressure with molten resin so that the top of the screw flight does not come into contact with the cylinder wall surface when the screw rotates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61129541A JPH0684035B2 (en) | 1986-06-04 | 1986-06-04 | Screw for molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61129541A JPH0684035B2 (en) | 1986-06-04 | 1986-06-04 | Screw for molding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62284718A true JPS62284718A (en) | 1987-12-10 |
| JPH0684035B2 JPH0684035B2 (en) | 1994-10-26 |
Family
ID=15012073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61129541A Expired - Fee Related JPH0684035B2 (en) | 1986-06-04 | 1986-06-04 | Screw for molding machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0684035B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0580733U (en) * | 1992-04-08 | 1993-11-02 | 株式会社日本製鋼所 | Screw for extruder |
| JP2011104870A (en) * | 2009-11-17 | 2011-06-02 | Japan Steel Works Ltd:The | Kneading method and apparatus of two-shaft screw type extruder |
| WO2011078192A1 (en) * | 2009-12-25 | 2011-06-30 | 株式会社神戸製鋼所 | Segment for kneading, and kneading facility |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011021274A1 (en) * | 2009-08-18 | 2011-02-24 | トヨタ自動車株式会社 | Screw segment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5337027U (en) * | 1976-09-07 | 1978-04-01 | ||
| JPS5621589A (en) * | 1979-05-08 | 1981-02-28 | Tech E Dou Rearizasuyon Ind E | Microorganism culturing method and apparatus in solid culture medium |
| JPS60242013A (en) * | 1984-04-20 | 1985-12-02 | Mitsubishi Heavy Ind Ltd | High-kneading screw |
-
1986
- 1986-06-04 JP JP61129541A patent/JPH0684035B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5337027U (en) * | 1976-09-07 | 1978-04-01 | ||
| JPS5621589A (en) * | 1979-05-08 | 1981-02-28 | Tech E Dou Rearizasuyon Ind E | Microorganism culturing method and apparatus in solid culture medium |
| JPS60242013A (en) * | 1984-04-20 | 1985-12-02 | Mitsubishi Heavy Ind Ltd | High-kneading screw |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0580733U (en) * | 1992-04-08 | 1993-11-02 | 株式会社日本製鋼所 | Screw for extruder |
| JP2011104870A (en) * | 2009-11-17 | 2011-06-02 | Japan Steel Works Ltd:The | Kneading method and apparatus of two-shaft screw type extruder |
| WO2011078192A1 (en) * | 2009-12-25 | 2011-06-30 | 株式会社神戸製鋼所 | Segment for kneading, and kneading facility |
| JP2011131543A (en) * | 2009-12-25 | 2011-07-07 | Kobe Steel Ltd | Kneading segment and kneading facility |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0684035B2 (en) | 1994-10-26 |
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| LAPS | Cancellation because of no payment of annual fees |