JPH10264221A - Method for plasticizing fiber reinforced pellet and apparatus therefor - Google Patents
Method for plasticizing fiber reinforced pellet and apparatus thereforInfo
- Publication number
- JPH10264221A JPH10264221A JP9073296A JP7329697A JPH10264221A JP H10264221 A JPH10264221 A JP H10264221A JP 9073296 A JP9073296 A JP 9073296A JP 7329697 A JP7329697 A JP 7329697A JP H10264221 A JPH10264221 A JP H10264221A
- Authority
- JP
- Japan
- Prior art keywords
- pellet
- plasticizing
- fiber
- screw
- reinforced resin
- 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
- 239000008188 pellet Substances 0.000 title claims abstract description 74
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000000835 fiber Substances 0.000 title abstract description 46
- 229920005989 resin Polymers 0.000 claims abstract description 33
- 239000011347 resin Substances 0.000 claims abstract description 33
- 239000004014 plasticizer Substances 0.000 claims description 6
- 238000004904 shortening Methods 0.000 abstract description 2
- 230000002708 enhancing effect Effects 0.000 abstract 1
- 230000000087 stabilizing effect Effects 0.000 abstract 1
- -1 polyethylene Polymers 0.000 description 6
- 229920005992 thermoplastic resin Polymers 0.000 description 6
- 239000004743 Polypropylene Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 238000001746 injection moulding Methods 0.000 description 5
- 229920001155 polypropylene Polymers 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 229930182556 Polyacetal Natural products 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 239000012784 inorganic fiber Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 239000011342 resin composition Substances 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000012748 slip agent Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 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
- B29C48/50—Details of extruders
- B29C48/505—Screws
- B29C48/635—Eccentrically rotating screws; Screws revolving around an axis other than their central axis
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、繊維強化樹脂ペレ
ットの可塑化方法及びその可塑化装置に関するものであ
る。さらに詳しくは、特定のペレット供給部を用いた繊
維強化樹脂ペレットの可塑化方法及びその可塑化装置に
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for plasticizing fiber-reinforced resin pellets. More specifically, the present invention relates to a method for plasticizing fiber-reinforced resin pellets using a specific pellet supply unit and a plasticizing apparatus therefor.
【０００２】[0002]
【従来の技術】繊維強化樹脂の強度をより高めるため
に、長繊維化ペレットを活用して、成形品中の繊維を長
く保つ方法等が提案されている。その中で、繊維破断を
できるだけ防止するために、可塑化装置の圧縮比を小さ
くする方法が提案されている。しかし、この方法では、
繊維化ペレットを長くした場合、可塑化装置のペレット
送り能力が低下し、可塑化時間が長くなったり、可塑化
が不安定になり、場合によっては、ペレットの割れが起
こり嵩が大きくなったて、送りが困難になる等の問題が
ある。また、実質的に可塑化時間が長くなり、逆に繊維
破断が進行する場合もある。2. Description of the Related Art In order to further increase the strength of a fiber-reinforced resin, there has been proposed a method of using a long fiber pellet to keep fibers in a molded product long. Among them, a method for reducing the compression ratio of a plasticizing device has been proposed in order to prevent fiber breakage as much as possible. But with this method,
If the fiberized pellets are lengthened, the pelletizing ability of the plasticizing device decreases, the plasticizing time increases, or the plasticization becomes unstable, and in some cases, the pellets crack and the bulk increases. However, there are problems such as difficulty in feeding. In addition, the plasticization time may be substantially lengthened, and on the contrary, fiber breakage may progress.
【０００３】そこで、繊維強化ペレットの送り能力の向
上、可塑化時間の短縮、可塑化の安定化、可塑化時の繊
維破断の低減が課題となっている。[0003] Therefore, improvement of the feeding ability of the fiber reinforced pellet, shortening of the plasticization time, stabilization of the plasticization, and reduction of the fiber breakage at the time of the plasticization are issues.
【０００４】[0004]
【発明が解決しようとする課題】本発明は、このような
状況下において、繊維強化樹脂ペレットの送り能力を高
め、可塑化時間を短縮すると共に、可塑化が安定し、実
質的に可塑化時の繊維破断が少ない可塑化方法及び装置
の提供を目的とするものである。SUMMARY OF THE INVENTION The present invention is intended to improve the feedability of fiber-reinforced resin pellets, shorten the plasticization time, stabilize the plasticization, and substantially reduce the plasticization time. It is an object of the present invention to provide a plasticizing method and an apparatus which cause less fiber breakage.
【０００５】[0005]
【課題を解決しようとする手段】本発明者らは上記課題
につき鋭意検討した結果、繊維強化樹脂ペレットの長さ
・径に対して、ペレット供給部のシリンダー部のアンダ
ーカット形状とスクリュ−溝深さを特定の関係を満たす
ようにすることで上記課題を解決できることを見出し
て、本発明を完成するに至った。すなわち、本発明は、
Ｌ（ｍｍ）のペレット長とφ（ｍｍ）のペレット径を有
する繊維強化樹脂ペレットを可塑化するにあたり、ペレ
ット供給部が下記の(a)及び(b) の関係を満たす可塑化
装置で可塑化することを特徴とする繊維強化ペレットの
可塑化方法を提供するものである。 (a) ｄ１ ≧ １．２×φ (b) ３．０×（Ｌ＋φ）≧ ｄ２＋ｄ１ ≧ １．１
×（Ｌ＋φ） 上記式において、ｄ１（ｍｍ）はシリンダーのアンダー
カット深さを示し、ｄ２（ｍｍ）はスクリューの溝深さ
を示す。好ましい態様として、Ｌが５〜５０ｍｍの範囲
であり、φが１〜６ｍｍの範囲であり、また、可塑化装
置のスクリュ−の外径が４０ｍｍ以上である上記の繊維
強化樹脂ペレットの可塑化方法を提供するものである。
また、本発明は、ペレット供給部が下記の(a) 及び(b)
の関係を満たすことを特徴とする繊維強化樹脂ペレット
の可塑化装置を提供するものである。 (a) ｄ１ ≧ １．２×φ (b) ３．０×（Ｌ＋φ）≧ ｄ２＋ｄ１ ≧ １．１
×（Ｌ＋φ） 上記式において、ｄ１（ｍｍ）はシリンダーのアンダー
カット深さ、ｄ２（ｍｍ）はスクリューの溝深さ、Ｌ
（ｍｍ）はペレット長、φ（ｍｍ）はペレット径を示
す。好ましい態様として、スクリュ−の外径が４０ｍｍ
以上である上記の繊維強化樹脂ペレットの可塑化装置を
提供するものである。Means for Solving the Problems As a result of intensive studies on the above-mentioned problems, the present inventors have found that the length and diameter of the fiber reinforced resin pellets, the undercut shape of the cylinder portion of the pellet supply section and the screw groove depth are different. It has been found that the above-mentioned problems can be solved by satisfying the above-mentioned specific relationship, and the present invention has been completed. That is, the present invention
In plasticizing fiber-reinforced resin pellets having a pellet length of L (mm) and a pellet diameter of φ (mm), the pellet supply unit is plasticized by a plasticizing device satisfying the following relationship (a) and (b). The present invention provides a method for plasticizing fiber-reinforced pellets. (a) d1 ≧ 1.2 × φ (b) 3.0 × (L + φ) ≧ d2 + d1 ≧ 1.1
× (L + φ) In the above equation, d1 (mm) indicates the undercut depth of the cylinder, and d2 (mm) indicates the groove depth of the screw. As a preferred embodiment, L is in the range of 5 to 50 mm, φ is in the range of 1 to 6 mm, and the outer diameter of the screw of the plasticizer is 40 mm or more. Is provided.
Further, according to the present invention, the pellet supply section has the following (a) and (b)
And a plasticizer for fiber-reinforced resin pellets characterized by satisfying the following relationship: (a) d1 ≧ 1.2 × φ (b) 3.0 × (L + φ) ≧ d2 + d1 ≧ 1.1
× (L + φ) In the above equation, d1 (mm) is the undercut depth of the cylinder, d2 (mm) is the groove depth of the screw, L
(Mm) indicates the pellet length, and φ (mm) indicates the pellet diameter. In a preferred embodiment, the outer diameter of the screw is 40 mm.
An object of the present invention is to provide an apparatus for plasticizing the above fiber-reinforced resin pellets.
【０００６】[0006]
【発明の実施の形態】本発明について、以下に詳細に説
明する。本発明の対象とする繊維強化樹脂ペレットと
は、ガラス繊維、炭素繊維、有機繊維、無機繊維、金属
繊維等の繊維を含有する熱可塑性樹脂組成物からなるペ
レットであり、好ましくは、これらの含有される繊維が
一方向に整列され、かつペレット長さに等しい繊維を含
むものである。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below. The fiber-reinforced resin pellets targeted by the present invention are glass fibers, carbon fibers, organic fibers, inorganic fibers, and pellets made of a thermoplastic resin composition containing fibers such as metal fibers. The fibers to be laid are unidirectionally aligned and include fibers equal to the length of the pellet.
【０００７】この繊維が一方向に整列され、かつペレッ
ト長さに等しい繊維を含む繊維強化樹脂ペレットは、繊
維を集束し、それに熱可塑性樹脂を加熱含浸させ、冷却
後、切断することにより得ることができる。繊維には必
要に応じて、熱可塑性樹脂の含浸性を改善する表面処理
を行ったり、収束性を改善するウレタン系又はオレフィ
ン系収束剤を用いてもよい。The fiber-reinforced resin pellets in which the fibers are aligned in one direction and include fibers equal in length to the pellet length are obtained by bundling the fibers, heating and impregnating them with a thermoplastic resin, cooling, and then cutting. Can be. If necessary, the fiber may be subjected to a surface treatment for improving the impregnation property of the thermoplastic resin, or a urethane-based or olefin-based sizing agent for improving the convergence property.
【０００８】含有される繊維の径は、特に問わないが、
通常、平均繊維径が２０μｍ以下、好ましくは１〜１７
μｍの範囲にあるものである。上記のペレット長さは、
通常５〜５０ｍｍ、好ましくは６〜３０ｍｍの範囲に、
その径は通常１〜６ｍｍ、好ましくは１．５〜４ｍｍ範
囲にあるものである。繊維強化樹脂ペレットに含有され
る繊維の量は通常２０〜８０重量％、好ましくは、３０
〜７０重量％ものを用いるのがよい。[0008] The diameter of the contained fiber is not particularly limited,
Usually, the average fiber diameter is 20 μm or less, preferably 1 to 17
It is in the range of μm. The above pellet length is
Usually in the range of 5 to 50 mm, preferably 6 to 30 mm,
Its diameter is usually in the range of 1 to 6 mm, preferably 1.5 to 4 mm. The amount of fiber contained in the fiber reinforced resin pellet is usually 20 to 80% by weight, preferably 30 to 80% by weight.
It is preferable to use those of up to 70% by weight.
【０００９】また、繊維強化樹脂ペレットは単独で用い
られてもよく、また２種以上を組み合わせて用いてもよ
い。繊維強化樹脂ペレットに用いられる熱可塑性樹脂
は、ポリエチレン、ポリプロピレン、ＡＢＳ、ポリカー
ボネート、ポリアミド、ポリアセタール等の熱可塑性樹
脂、これらの熱可塑性樹脂にエチレン・α−オレフィン
共重合体エラストマー等のエラストマーを添加したも
の、又は不飽和カルボン酸もしくはその誘導体で変成さ
れた酸変成ポリオレフィン系樹脂を含有する熱可塑性樹
脂（例えば、ポリプロピレン）等が挙げられる。また、
これらの樹脂には、常用される酸化防止剤、中和剤、ス
リップ剤、アンチブロッキング剤、耐電防止剤等を必要
に応じて配合してもよい。The fiber reinforced resin pellets may be used alone or in combination of two or more. The thermoplastic resin used for the fiber-reinforced resin pellets is a thermoplastic resin such as polyethylene, polypropylene, ABS, polycarbonate, polyamide, and polyacetal. Or a thermoplastic resin (for example, polypropylene) containing an acid-modified polyolefin-based resin modified with an unsaturated carboxylic acid or a derivative thereof. Also,
These resins may be mixed with commonly used antioxidants, neutralizing agents, slip agents, antiblocking agents, antistatic agents, and the like, if necessary.
【００１０】本発明の繊維強化樹脂ペレットの可塑化方
法は、Ｌ（ｍｍ）のペレット長とφ（ｍｍ）のペレット
径の繊維強化樹脂ペレットを可塑化するにあたり、ペレ
ット供給部が下記の(a) 及び(b) の関係を満たす可塑化
装置で可塑化することを特徴とするものである。 (a) ｄ１ ≧ １．２×φ (b) ３．０×（Ｌ＋φ）≧ ｄ２＋ｄ１ ≧ １．１
×（Ｌ＋φ） 上記のｄ１（ｍｍ）は第１図に示すシリンダーのアンダ
ーカット深さを示し、より正確には、スクリュー中心か
らスクリュー回転方向のシリンダーのアンダーカット部
までの最大長さＣ（ｍｍ）とスクリュー外径Ｄ１（ｍ
ｍ）の１／２との差（ｄ１＝〔Ｃ−（Ｄ１／２）〕であ
る。また、ｄ２（ｍｍ）はスクリューの溝深さを示し、
スクリュー外径Ｄ１（ｍｍ）とスクリュー溝部外径Ｄ２
（ｍｍ）の差の１／２〔ｄ２＝（Ｄ１−Ｄ２）／２〕で
ある。In the method of plasticizing a fiber-reinforced resin pellet according to the present invention, when the plasticizing of the fiber-reinforced resin pellet having a pellet length of L (mm) and a pellet diameter of φ (mm) is performed, ) And (b). (a) d1 ≧ 1.2 × φ (b) 3.0 × (L + φ) ≧ d2 + d1 ≧ 1.1
× (L + φ) The above d1 (mm) indicates the undercut depth of the cylinder shown in FIG. 1, more precisely, the maximum length C (mm) from the screw center to the undercut portion of the cylinder in the screw rotation direction. ) And screw outer diameter D1 (m
m) is a difference (d1 = [C− (D1 / 2)]) from d. (2) d2 (mm) indicates the groove depth of the screw,
Screw outer diameter D1 (mm) and screw groove outer diameter D2
(D) = (D2 = (D1-D2) / 2).
【００１１】ｄ１が１．２×φ未満では、噛み込みが悪
くなり、可塑化時間が長くなるばかりか、長いペレット
は可塑化できなくなる場合がある。ｄ２＋ｄ１が３．０
×（Ｌ＋φ）を超えると、トルクがかかり過ぎて、スク
リュー強度が不足する場合があると共に、圧縮が大きく
なり、繊維破断が大きくなる。一方、ｄ２＋ｄ１が１．
１×（Ｌ＋φ）未満では、噛み込みが悪くなり、可塑化
時間が長くなるばかりか、長いペレットが可塑化できな
くなる場合がある。また、可塑化時間が長くなること
で、繊維破断が大きくなる場合がある。If d1 is less than 1.2 × φ, the biting becomes poor, and not only the plasticization time becomes long, but also long pellets may not be plasticized. d2 + d1 is 3.0
When x (L + φ) is exceeded, torque may be excessively applied and the screw strength may be insufficient, and the compression may increase and the fiber breakage may increase. On the other hand, d2 + d1 is 1.
When it is less than 1 × (L + φ), the biting becomes poor, and not only the plasticization time becomes long, but also a long pellet may not be plasticized. In addition, fiber breakage may be increased due to a longer plasticization time.
【００１２】本発明の繊維強化樹脂ペレットの可塑化方
法の内、好ましい態様としては、Ｌが５〜５０ｍｍの範
囲であり、φが１〜６ｍｍの範囲であるペレットにおい
て、可塑化装置のスクリュ−の外径が４０ｍｍ以上であ
る上記の繊維強化樹脂ペレットの可塑化方法を提供する
ものである。より好ましい態様としては、スクリュ−の
外径が６０ｍｍ以上である可塑化方法である。スクリュ
ー外径が４０ｍｍ以上となると噛み込みがよくなり、繊
維破断が進まない傾向がある。In a preferred embodiment of the method for plasticizing fiber-reinforced resin pellets according to the present invention, in a pellet in which L is in a range of 5 to 50 mm and φ is in a range of 1 to 6 mm, a screw of a plasticizing apparatus is used. The present invention provides a method for plasticizing the above fiber-reinforced resin pellets, wherein the outer diameter of the pellet is 40 mm or more. A more preferred embodiment is a plasticizing method in which the screw has an outer diameter of 60 mm or more. When the screw outer diameter is 40 mm or more, the biting becomes better, and fiber breakage tends to not progress.
【００１３】本発明の繊維強化樹脂ペレットの可塑化装
置は、射出成形機の可塑化装置、単軸の押出成形機等の
可塑化装置を対象とするもので、好ましくは射出成形機
の可塑化装置を対象とする。この装置は、下記の(a) 及
び(b) の関係を満たすようなペレット供給部のシリンダ
ー形状及びスクリュー形状としたことを特徴とするもの
である。 (a) ｄ１ ≧ １．２×φ (b) ３．０×（Ｌ＋φ）≧ ｄ２＋ｄ１ ≧ １．１
×（Ｌ＋φ） 上記式において、ｄ１（ｍｍ）はシリンダーのアンダー
カット深さ、ｄ２（ｍｍ）はスクリューの溝深さ、Ｌ
（ｍｍ）はペレット長、φ（ｍｍ）はペレット径を示
す。この装置において、上記の(a) 及び(b) とする必要
があるのは、可塑化方法における理由と同様である。こ
のシリンダー部のアンダーカットは、第１図に示すよう
に可塑化装置のペレットを供給するホッパー部に対し
て、少なくともスクリューの回転方向に設けるものであ
り、ホッパー部を０度とすると、約９０度までは最大カ
ットとするのがよい。以上で説明したように上記の(a)
及び(b) の条件を満足するようにスクリュー形状の選択
とシリンダーアンダーカット深さの選択は必要である
が、シリンダー部をアンダーカットとするという簡単な
加工で繊維強化樹脂ペレットの送り能力を高め、可塑化
時間を短縮できる。また、可塑化が安定し、実質的に可
塑化時の繊維破断が少なくなるという極めて大きな効果
が得られる。特に、長繊維強化樹脂ペレットにおいて、
これらの効果が顕著である。[0013] The plasticizing apparatus for the fiber-reinforced resin pellets of the present invention is intended for a plasticizing apparatus such as an injection molding machine or a single-screw extruder. Preferably, the plasticizing apparatus for the injection molding machine is used. Targets equipment. This apparatus is characterized in that the pellet supply section has a cylinder shape and a screw shape satisfying the following relationships (a) and (b). (a) d1 ≧ 1.2 × φ (b) 3.0 × (L + φ) ≧ d2 + d1 ≧ 1.1
× (L + φ) In the above equation, d1 (mm) is the undercut depth of the cylinder, d2 (mm) is the groove depth of the screw, L
(Mm) indicates the pellet length, and φ (mm) indicates the pellet diameter. In this apparatus, the above (a) and (b) are required for the same reason as in the plasticizing method. As shown in FIG. 1, the undercut of the cylinder portion is provided at least in the rotation direction of the screw with respect to the hopper portion for supplying pellets of the plasticizing device. It is good to make the maximum cut up to the degree. As described above, the above (a)
Although it is necessary to select the screw shape and the cylinder undercut depth to satisfy the conditions of (b) and (b), the feed capacity of the fiber-reinforced resin pellets is increased by simple processing of undercutting the cylinder. , Plasticization time can be shortened. Further, an extremely great effect is obtained in that the plasticization is stable and the fiber breakage during the plasticization is substantially reduced. In particular, in long fiber reinforced resin pellets,
These effects are remarkable.
【００１４】[0014]
【実施例】以下に、実施例及び比較例に基づいて本発明
をさらに具体的に説明するが、本発明はこれらの実施例
に限定されるものではない。 〔実施例１〕一方向に配列されたガラス繊維（以下、Ｇ
Ｆ）を４０重量％含有する繊維強化ポリプロピレン系樹
脂ペレット（ペレット長１６ｍｍ、ペレット径３ｍｍ）
をスクリュー外径（Ｄ１）＝６２ｍｍ、スクリュー溝深
さ（ｄ２）＝１４ｍｍ、シリンダーアンダーカット深さ
（ｄ１）＝３０ｍｍである形状を有する可塑化装置を備
えた射出成形機を用いて、設定温度２５０℃、回転数５
０ｒｐｍ、ストローク２００ｍｍで可塑化を行った。可
塑化時間（所定のストロークとなるまでの所要時間）
は、１２秒であった。また、パージ品中の繊維の重量平
均繊維長は、６．３ｍｍと充分長いものであった。EXAMPLES Hereinafter, the present invention will be described more specifically based on Examples and Comparative Examples, but the present invention is not limited to these Examples. Example 1 Glass fibers arranged in one direction (hereinafter referred to as G
Fiber-reinforced polypropylene resin pellet containing 40% by weight of F) (pellet length 16 mm, pellet diameter 3 mm)
Using an injection molding machine equipped with a plasticizing device having a shape of screw outer diameter (D1) = 62 mm, screw groove depth (d2) = 14 mm, and cylinder undercut depth (d1) = 30 mm, set temperature 250 ° C, rotation speed 5
Plasticization was performed at 0 rpm and a stroke of 200 mm. Plasticization time (time required to reach the specified stroke)
Was 12 seconds. The weight average fiber length of the fibers in the purged product was 6.3 mm, which was sufficiently long.
【００１５】〔実施例２〕一方向に配列されたＧＦを６
０重量％含有する繊維強化ポリプリピレン系樹脂ペレッ
ト（ペレット長１２ｍｍ、ペレット径２．５ｍｍ）をス
クリュー外径（Ｄ１）＝４２ｍｍ、スクリュー溝深さ
（ｄ２）＝９ｍｍ、シリンダーアンダーカット深さ（ｄ
１）＝１０ｍｍである形状を有する可塑化装置を備えた
射出成形機を用いて、設定温度２２０℃、回転数５０ｒ
ｐｍ、ストローク１２０ｍｍで可塑化を行った。可塑化
時間は、１０秒であった。また、パージ品中の繊維の重
量平均繊維長は、４．９ｍｍと充分長いものであった。[Example 2] The number of GFs arranged in one direction was 6
A fiber reinforced polypropylene resin pellet (pellet length 12 mm, pellet diameter 2.5 mm) containing 0% by weight contains a screw outer diameter (D1) = 42 mm, a screw groove depth (d2) = 9 mm, and a cylinder undercut depth (d).
1) Using an injection molding machine equipped with a plasticizing device having a shape of = 10 mm, a set temperature of 220 ° C. and a rotation speed of 50 r
Plasticization was performed at pm and a stroke of 120 mm. The plasticization time was 10 seconds. The weight average fiber length of the fibers in the purged product was 4.9 mm, which was sufficiently long.
【００１６】〔実施例３〕一方向に配列されたＧＦを３
０重量％含有する繊維強化ポリプリピレン系樹脂ペレッ
ト（ペレット長２０ｍｍ、ペレット径４ｍｍ）をスクリ
ュー外径（Ｄ１）＝１０５ｍｍ、スクリュー溝深さ（ｄ
２）＝１５ｍｍ、シリンダーアンダーカット深さ（ｄ
１）＝５０ｍｍである形状を有する可塑化装置を備えた
射出成形機を用いて、設定温度２５０℃、回転数５０ｒ
ｐｍ、ストローク２００ｍｍで可塑化を行った。可塑化
時間は、１８秒であった。また、パージ品中の繊維の重
量平均繊維長は、８．１ｍｍと充分長いものであった。[Embodiment 3] GFs arranged in one direction are 3
A fiber reinforced polypropylene resin pellet (pellet length: 20 mm, pellet diameter: 4 mm) containing 0% by weight is screw outer diameter (D1) = 105 mm, screw groove depth (d)
2) = 15mm, cylinder undercut depth (d
1) Using an injection molding machine equipped with a plasticizing device having a shape of = 50 mm, a set temperature of 250 ° C. and a rotation speed of 50 r
Plasticization was performed at pm and a stroke of 200 mm. The plasticization time was 18 seconds. The weight average fiber length of the fibers in the purged product was 8.1 mm, which was sufficiently long.
【００１７】〔比較例１〕実施例１において、ｄ１＝２
ｍｍとした以外は同様にして行った。可塑化時間は、１
３４秒であった。また、パージ品中の繊維の重量平均繊
維長は、１．１ｍｍと破断が進んでいた。 〔比較例２〕実施例１において、ｄ２＝１０ｍｍ、ｄ１
＝４ｍｍとした以外は同様にして行った。可塑化時間
は、７２秒であった。また、パージ品中の繊維の重量平
均繊維長は、１．７ｍｍと破断が進んでいた。Comparative Example 1 In Example 1, d1 = 2
The procedure was performed in the same manner except that mm was used. Plasticization time is 1
34 seconds. Further, the weight average fiber length of the fibers in the purged product was 1.1 mm, and the breakage was advanced. Comparative Example 2 In Example 1, d2 = 10 mm, d1
= 4 mm. The plasticization time was 72 seconds. Moreover, the weight average fiber length of the fibers in the purged product was 1.7 mm, and the breakage was advanced.
【００１８】〔比較例３〕実施例２において、ｄ２＝１
５ｍｍ、ｄ１＝４０ｍｍとした以外は同様にして行っ
た。可塑化時間は、８秒であった。しかし、必要となる
トルクが極めて高く、スクリュー強度の許容値を越える
ので、連続成形は実質的に不可能である。また、パージ
品中の繊維の重量平均繊維長は、０．８ｍｍと破断が進
んでいた。Comparative Example 3 In Example 2, d2 = 1
The same procedure was performed except that 5 mm and d1 = 40 mm. The plasticization time was 8 seconds. However, since the required torque is extremely high and exceeds the allowable value of the screw strength, continuous molding is practically impossible. Further, the weight average fiber length of the fibers in the purged product was 0.8 mm, and the breakage was advanced.
【００１９】〔比較例４〕実施例３において、ｄ２＝１
１ｍｍ、ｄ１＝０ｍｍとした以外は同様にして行った。
可塑化時間を５分としても可塑化できなかった。Comparative Example 4 In Example 3, d2 = 1
The same procedure was performed except that 1 mm and d1 = 0 mm.
Even if the plasticizing time was set to 5 minutes, the plasticizing could not be performed.
【００２０】[0020]
【発明の効果】本発明により、繊維強化樹脂ペレットの
送り能力を高め、可塑化時間を短縮すると共に、可塑化
が安定し、実質的に可塑化時の繊維破断が少ない可塑化
方法及び装置の提供ができる。According to the present invention, there is provided a plasticizing method and apparatus which enhances the feeding ability of fiber-reinforced resin pellets, shortens plasticizing time, stabilizes plasticizing, and substantially reduces fiber breakage during plasticizing. Can be provided.
【図１】第１図は、本発明の可塑化装置のシリンダー−
アンダーカット部の形状の概要図であり、図（ｂ）は図
（ａ）におけるＸ−Ｘ’断面を示す。FIG. 1 shows a cylinder of a plasticizing apparatus according to the present invention.
It is a schematic diagram of the shape of an undercut part, and figure (b) shows XX 'cross section in figure (a).
Ｃ ：スクリュー中心からスクリュー回転方向のシリン
ダーのアンダーカット部までの最大長さ Ｄ１：スクリュ−の外径 Ｄ２：スクリュ−の溝部外径C: Maximum length from the center of the screw to the undercut of the cylinder in the screw rotation direction D1: Outer diameter of screw D2: Outer diameter of screw groove
Claims (4)
ペレット径を有する繊維強化樹脂ペレットを可塑化する
にあたり、ペレット供給部が下記の(a) 及び(b) の関係
を満たす可塑化装置で可塑化することを特徴とする繊維
強化樹脂ペレットの可塑化方法。 (a) ｄ１ ≧ １．２×φ (b) ３．０×（Ｌ＋φ）≧ ｄ２＋ｄ１ ≧ １．１
×（Ｌ＋φ） 上記式において、ｄ１（ｍｍ）はシリンダーのアンダー
カット深さを示し、ｄ２（ｍｍ）はスクリューの溝深さ
を示す。When plasticizing a fiber-reinforced resin pellet having a pellet length of L (mm) and a pellet diameter of φ (mm), the pellet supply unit satisfies the following relationship (a) and (b). A plasticizing method of a fiber-reinforced resin pellet, characterized by plasticizing with a plasticizer. (a) d1 ≧ 1.2 × φ (b) 3.0 × (L + φ) ≧ d2 + d1 ≧ 1.1
× (L + φ) In the above equation, d1 (mm) indicates the undercut depth of the cylinder, and d2 (mm) indicates the groove depth of the screw.
〜６ｍｍの範囲であり、また、可塑化装置のスクリュ−
の外径が４０ｍｍ以上である請求項１に記載の繊維強化
樹脂ペレットの可塑化方法。2. L is in the range of 5 to 50 mm and φ is 1
~ 6mm, and the screw of plasticizer
The method for plasticizing fiber-reinforced resin pellets according to claim 1, wherein the outer diameter of the fiber-reinforced resin pellets is 40 mm or more.
関係を満たすことを特徴とする繊維強化樹脂ペレットの
可塑化装置。 (a) ｄ１ ≧ １．２×φ (b) ３．０×（Ｌ＋φ）≧ ｄ２＋ｄ１ ≧ １．１
×（Ｌ＋φ） 上記式において、ｄ１（ｍｍ）はシリンダーのアンダー
カット深さ、ｄ２（ｍｍ）はスクリューの溝深さ、Ｌ
（ｍｍ）はペレット長、φ（ｍｍ）はペレット径を示
す。3. An apparatus for plasticizing fiber-reinforced resin pellets, wherein the pellet supply section satisfies the following relations (a) and (b). (a) d1 ≧ 1.2 × φ (b) 3.0 × (L + φ) ≧ d2 + d1 ≧ 1.1
× (L + φ) In the above equation, d1 (mm) is the undercut depth of the cylinder, d2 (mm) is the groove depth of the screw, L
(Mm) indicates the pellet length, and φ (mm) indicates the pellet diameter.
ｍ以上である請求項３に記載の繊維強化樹脂ペレットの
可塑化装置。4. The screw of the plasticizer has an outer diameter of 40 m.
The plasticizer for fiber-reinforced resin pellets according to claim 3, which is not less than m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9073296A JPH10264221A (en) | 1997-03-26 | 1997-03-26 | Method for plasticizing fiber reinforced pellet and apparatus therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9073296A JPH10264221A (en) | 1997-03-26 | 1997-03-26 | Method for plasticizing fiber reinforced pellet and apparatus therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10264221A true JPH10264221A (en) | 1998-10-06 |
Family
ID=13514069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9073296A Pending JPH10264221A (en) | 1997-03-26 | 1997-03-26 | Method for plasticizing fiber reinforced pellet and apparatus therefor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10264221A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10007273B4 (en) * | 1999-02-17 | 2005-08-18 | Koito Mfg. Co., Ltd. | Automatic vehicle headlight adjusting device |
| JP2012148443A (en) * | 2011-01-18 | 2012-08-09 | Toyota Motor Corp | Fiber-reinforced resin material of structure with rib, and method for manufacturing the same |
| JP2014069319A (en) * | 2012-09-27 | 2014-04-21 | Canon Electronics Inc | Material feeder and injection molding apparatus |
-
1997
- 1997-03-26 JP JP9073296A patent/JPH10264221A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10007273B4 (en) * | 1999-02-17 | 2005-08-18 | Koito Mfg. Co., Ltd. | Automatic vehicle headlight adjusting device |
| JP2012148443A (en) * | 2011-01-18 | 2012-08-09 | Toyota Motor Corp | Fiber-reinforced resin material of structure with rib, and method for manufacturing the same |
| JP2014069319A (en) * | 2012-09-27 | 2014-04-21 | Canon Electronics Inc | Material feeder and injection molding apparatus |
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