JP2019055550A - Method and apparatus for molding fiber-reinforced thermoplastic resin molding - Google Patents
Method and apparatus for molding fiber-reinforced thermoplastic resin molding Download PDFInfo
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- 229920005992 thermoplastic resin Polymers 0.000 title claims abstract description 94
- 238000000465 moulding Methods 0.000 title claims abstract description 75
- 238000000034 method Methods 0.000 title claims abstract description 39
- 239000000835 fiber Substances 0.000 claims abstract description 55
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 40
- 238000004513 sizing Methods 0.000 claims abstract description 40
- 238000004898 kneading Methods 0.000 claims abstract description 8
- 238000002844 melting Methods 0.000 claims abstract 2
- 230000008018 melting Effects 0.000 claims abstract 2
- 239000012783 reinforcing fiber Substances 0.000 claims description 112
- 229920005989 resin Polymers 0.000 claims description 34
- 239000011347 resin Substances 0.000 claims description 34
- 238000010438 heat treatment Methods 0.000 claims description 29
- 235000003642 hunger Nutrition 0.000 claims description 17
- 230000037351 starvation Effects 0.000 claims description 16
- 238000001704 evaporation Methods 0.000 claims description 5
- 239000004014 plasticizer Substances 0.000 claims description 4
- 230000002787 reinforcement Effects 0.000 abstract 5
- 229920000049 Carbon (fiber) Polymers 0.000 description 19
- 239000004917 carbon fiber Substances 0.000 description 19
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 14
- 238000007493 shaping process Methods 0.000 description 6
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 238000000748 compression moulding Methods 0.000 description 5
- 239000006185 dispersion Substances 0.000 description 5
- 239000003365 glass fiber Substances 0.000 description 5
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 239000008188 pellet Substances 0.000 description 5
- 239000003822 epoxy resin Substances 0.000 description 4
- 238000001746 injection moulding Methods 0.000 description 4
- 229920000647 polyepoxide Polymers 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
- B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
- B29B7/40—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft
- B29B7/42—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft with screw or helix
-
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/18—Feeding the material into the injection moulding apparatus, i.e. feeding the non-plastified material into the injection unit
-
- 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
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0011—Combinations of extrusion moulding with other shaping operations combined with compression moulding
-
- 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
- B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
-
- 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
- B29C48/285—Feeding the extrusion material to the extruder
- B29C48/288—Feeding the extrusion material to the extruder in solid form, e.g. powder or granules
- B29C48/2886—Feeding the extrusion material to the extruder in solid form, e.g. powder or granules of fibrous, filamentary or filling materials, e.g. thin fibrous reinforcements or fillers
-
- 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
- B29C48/76—Venting, drying means; Degassing means
- B29C48/765—Venting, drying means; Degassing means in the extruder apparatus
- B29C48/766—Venting, drying means; Degassing means in the extruder apparatus in screw extruders
- B29C48/767—Venting, drying means; Degassing means in the extruder apparatus in screw extruders through a degassing opening of a barrel
-
- 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
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
- B29C48/83—Heating or cooling the cylinders
- B29C48/832—Heating
-
- 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
- B29K2101/00—Use of unspecified macromolecular compounds as moulding material
- B29K2101/12—Thermoplastic materials
-
- 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
- B29K2105/08—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Reinforced Plastic Materials (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
Description
本発明は、熱可塑性樹脂に炭素繊維、ガラス繊維等の強化繊維を所定の割合で混合・混練して繊維強化熱可塑性樹脂を得、該繊維強化熱可塑性樹脂から成形品を成形する成形方法、および成形装置に関するものである。 The present invention is a method for molding a fiber-reinforced thermoplastic resin by mixing and kneading carbon fiber, glass fiber and other reinforcing fibers in a predetermined ratio to the thermoplastic resin, and molding a molded product from the fiber-reinforced thermoplastic resin, And a molding apparatus.
炭素繊維、ガラス繊維等の強化繊維と熱可塑性樹脂とからなる繊維強化熱可塑性樹脂によって成形される成形品は強化繊維を含まない樹脂成形品に比して強度が大きく、色々な分野に利用されている。繊維強化熱可塑性樹脂は、熱可塑性樹脂の材料である樹脂ペレットと、強化繊維とから射出成形機、押出機等によって製造されるが、強化繊維はいわゆるロービングとして提供されている。つまり炭素繊維、ガラス繊維等の強化繊維はその単繊維が数十〜数百本で集束されてストランドにされ、このようなストランドが数十本撚り合わされて粗糸状にされる。すなわちロービングにされる。強化繊維は、このようなロービングが円柱状のロールに巻かれた状態で提供されている。例えば射出成形機により繊維強化熱可塑性樹脂を得る場合、加熱シリンダとスクリュとからなる射出装置に樹脂ペレットを供給する。樹脂ペレットは溶融してスクリュによって前方に送られる。加熱シリンダの所定の箇所に開口部を設け、該開口部から強化繊維を加熱シリンダ内に供給する。強化繊維は、ロービングを所定長さに切断して加熱シリンダに供給してもいいし、ロービングの状態のままで加熱シリンダに供給してもよい。強化繊維はスクリュの回転によるせん断力で切断されながら樹脂と混合され、繊維強化熱可塑性樹脂が得られる。型締めした金型に繊維強化熱可塑性樹脂を射出し、必要に応じて圧縮成形すると成形品が得られる。 Molded products made of fiber reinforced thermoplastic resin composed of reinforced fibers such as carbon fiber and glass fiber and thermoplastic resin have higher strength than resin molded products that do not contain reinforced fiber, and are used in various fields. ing. The fiber reinforced thermoplastic resin is produced from resin pellets, which are thermoplastic resin materials, and reinforcing fibers by an injection molding machine, an extruder, or the like. The reinforcing fibers are provided as so-called rovings. That is, reinforced fibers such as carbon fiber and glass fiber are bundled with several tens to several hundreds of single fibers into strands, and several tens of such strands are twisted to form a roving. That is, it is roving. The reinforcing fiber is provided in a state in which such roving is wound around a cylindrical roll. For example, when a fiber reinforced thermoplastic resin is obtained by an injection molding machine, resin pellets are supplied to an injection device composed of a heating cylinder and a screw. The resin pellet is melted and sent forward by a screw. An opening is provided at a predetermined location of the heating cylinder, and reinforcing fibers are supplied into the heating cylinder from the opening. The reinforcing fiber may be supplied to the heating cylinder by cutting the roving into a predetermined length, or may be supplied to the heating cylinder in the roving state. The reinforcing fiber is mixed with the resin while being cut by a shearing force generated by the rotation of the screw, so that a fiber-reinforced thermoplastic resin is obtained. A molded product is obtained by injecting a fiber reinforced thermoplastic resin into a mold that has been clamped and compression molding as necessary.
特許文献１には、熱可塑性樹脂と強化繊維とから繊維強化熱可塑性樹脂を製造するとき、ロービングとして提供される強化繊維を開繊して供給する方法が記載されている。この文献によると「開繊」とは、強化繊維束を連続して幅広く薄い状態にする工程であり、具体的な開繊方法としては、強化繊維の束を丸棒でしごいたり、水流や降圧空気流をあてたり、超音波振動で加振してばらけさせたり、あるいは開繊ローラを備えた開繊装置によって実施するようにしている。つまり物理的な力を作用させてロービングの状態で互いに拘束されている強化繊維をばらけさせるようにしている。特許文献１に記載の方法では、このように強化繊維を開繊した後に、これを所定長さに切断して切断済み強化繊維とする。そして例えば射出成形機であれば加熱シリンダに切断済み強化繊維を供給すると、加熱シリンダ内で溶融樹脂と混練して繊維強化熱可塑性樹脂が得られる。開繊せずに強化繊維束の状態で加熱シリンダに投入する従来の方法では、樹脂との混練時に強化繊維に作用する外力が束の外側と内側とで不均一になって強化繊維が折れたり切断し易いが、特許文献１に記載の方法により開繊した強化繊維を供給して樹脂と混練するようにすると強化繊維に作用する外力が一様になるので切断され難くなる。これによって繊維長分布が均一な繊維強化熱可塑性樹脂が得られる。 Patent Document 1 describes a method of opening and supplying reinforcing fibers provided as roving when a fiber-reinforced thermoplastic resin is produced from a thermoplastic resin and reinforcing fibers. According to this document, “opening” is a process in which a bundle of reinforcing fibers is continuously made into a wide and thin state. As a specific opening method, a bundle of reinforcing fibers is squeezed with a round bar, This is carried out by applying a low-pressure air flow, oscillating it with ultrasonic vibrations, or by using a fiber opening device equipped with a fiber opening roller. That is, the reinforcing fibers that are constrained to each other in the roving state are separated by applying a physical force. In the method described in Patent Document 1, after opening the reinforcing fiber in this way, it is cut into a predetermined length to obtain a cut reinforcing fiber. For example, in the case of an injection molding machine, when the cut reinforcing fiber is supplied to the heating cylinder, the fiber reinforced thermoplastic resin is obtained by kneading with the molten resin in the heating cylinder. In the conventional method in which a reinforcing fiber bundle is put into a heating cylinder without opening the fiber, the external force acting on the reinforcing fiber during kneading with the resin becomes uneven on the outside and inside of the bundle and the reinforcing fiber breaks. Although it is easy to cut, if the reinforcing fiber opened by the method described in Patent Document 1 is supplied and kneaded with the resin, the external force acting on the reinforcing fiber becomes uniform, so that it becomes difficult to cut. As a result, a fiber-reinforced thermoplastic resin having a uniform fiber length distribution can be obtained.
特許文献１に記載されている方法は、ロービングとして提供されている強化繊維を開繊して樹脂に供給し混練するようになっているので、強化繊維が束になっている場合に比して樹脂との混練時に強化繊維に作用する外力は均一になる。従って外力の不均一によって切断される強化繊維の割合が少なくなるという優れた効果がある。しかしながら、改善すべき課題も見受けられる。具体的には、繊維強化熱可塑性樹脂において、強化繊維が均一に分散される保証がないという問題がある。ロービングとして提供されている強化繊維は、ロービングにされるときに所定の集束剤、例えばエポキシ系樹脂からなる集束剤が添加されている。炭素繊維、ガラス繊維等は非常に細いのでこれらがばらけないようにするためである。特許文献１に記載の方法で実施している開繊は、単に強化繊維束に物理的な力を作用させてばらけさせているだけであるので集束剤は強化繊維に付着した状態になっている。従って開繊しても単繊維は完全にバラバラにはなっておらず、ある程度の本数がまとまった状態にしかならない。このような強化繊維が樹脂に供給されて混練されると、強化繊維は十分に均一に分散することが保証されない。樹脂中における強化繊維の分散の度合いは、成形される成形品の全体の強度と成形品の異なる部分毎の強度の均一性に影響するが、特許文献１に記載の方法によっては強化繊維が高いレベルで均一に分散することが保証できないので問題がある。 The method described in Patent Document 1 is designed so that the reinforcing fibers provided as roving are opened, supplied to the resin, and kneaded, so compared with the case where the reinforcing fibers are bundled. The external force acting on the reinforcing fiber during kneading with the resin becomes uniform. Therefore, there is an excellent effect that the ratio of reinforcing fibers cut by non-uniformity of external force is reduced. However, there are some issues to be improved. Specifically, there is a problem that there is no guarantee that the reinforcing fibers are uniformly dispersed in the fiber-reinforced thermoplastic resin. A reinforcing fiber provided as roving is added with a predetermined sizing agent, for example, a sizing agent made of an epoxy resin, when roving. This is because carbon fibers, glass fibers, and the like are very thin so that they do not fall apart. In the fiber opening performed by the method described in Patent Document 1, the sizing agent is attached to the reinforcing fiber because it is merely scattered by applying a physical force to the reinforcing fiber bundle. Yes. Therefore, even if the fibers are opened, the single fibers are not completely separated, and only a certain number of fibers are collected. When such reinforcing fibers are supplied to the resin and kneaded, it is not guaranteed that the reinforcing fibers are sufficiently uniformly dispersed. The degree of dispersion of the reinforcing fibers in the resin affects the overall strength of the molded article to be molded and the uniformity of the strength of different parts of the molded article, but depending on the method described in Patent Document 1, the reinforcing fibers are high. There is a problem because it is not possible to guarantee uniform dispersion at the level.
したがって、本発明は、熱可塑性樹脂と、ロービングとして提供される強化繊維とから繊維強化熱可塑性樹脂を得、繊維強化熱可塑性樹脂から成形品を得る方法であって、樹脂中において強化繊維の均一な分散の度合いが大きい繊維強化熱可塑性樹脂を得ることができ、それによって高い強度の成形品を得ることができる繊維強化熱可塑性樹脂成形品の成形方法および成形装置を提供することを目的としている。 Therefore, the present invention is a method for obtaining a fiber reinforced thermoplastic resin from a thermoplastic resin and reinforcing fibers provided as rovings, and obtaining a molded product from the fiber reinforced thermoplastic resin, wherein the reinforcing fibers are uniformly distributed in the resin. An object of the present invention is to provide a method and apparatus for molding a fiber-reinforced thermoplastic resin molded article that can obtain a fiber-reinforced thermoplastic resin having a high degree of dispersion and thereby obtain a molded article with high strength. .
本発明は、熱可塑性樹脂を溶融し、強化繊維を添加し混練して繊維強化熱可塑性樹脂を得、該繊維強化熱可塑性樹脂から成形品を得る成形方法を対象とする。強化繊維は、複数本の単繊維が撚り合わされてロービングになって提供されている。本発明は、ロービングに添加されている集束剤を所定の除去手段で除去した強化繊維を熱可塑性樹脂に添加するように構成する。 The present invention is directed to a molding method in which a thermoplastic resin is melted, reinforcing fibers are added and kneaded to obtain a fiber-reinforced thermoplastic resin, and a molded product is obtained from the fiber-reinforced thermoplastic resin. The reinforcing fiber is provided as a roving obtained by twisting a plurality of single fibers. In the present invention, the reinforcing fiber obtained by removing the sizing agent added to the roving by a predetermined removing means is added to the thermoplastic resin.
すなわち、請求項１に記載の発明は、熱可塑性樹脂を溶融し、複数本の単繊維が撚り合わされてロービングになっている強化繊維を添加し混練して繊維強化熱可塑性樹脂を得、該繊維強化熱可塑性樹脂から成形品を得る成形方法であって、前記強化繊維は、前記ロービングに添加されている集束剤を所定の除去手段で除去したものを前記熱可塑性樹脂に添加することを特徴とする繊維強化熱可塑性樹脂から成形品を得る成形方法として構成される。
請求項２に記載の発明は、請求項１に記載の成形方法において、前記除去手段は前記ロービングを加熱して前記集束剤を蒸発させる加熱手段からなることを特徴とする繊維強化熱可塑性樹脂から成形品を得る成形方法として構成される。
請求項３に記載の発明は、請求項１または２に記載の成形方法において、前記繊維強化熱可塑性樹脂の混練はシリンダとスクリュとからなる可塑化装置によって実施するようにし、前記可塑化装置において前記熱可塑性樹脂を溶融して前方に送るとき、前記可塑化装置において樹脂圧力を低下させる飢餓区間を設けるようにし、前記強化繊維は前記飢餓区間において添加することを特徴とする繊維強化熱可塑性樹脂から成形品を得る成形方法として構成される。
請求項４に記載の発明は、請求項１〜３のいずれかの項に記載の成形方法において、前記強化繊維は予め所定の長さに切断して前記熱可塑性樹脂に添加することを特徴とする繊維強化熱可塑性樹脂から成形品を得る成形方法として構成される。
That is, the invention according to claim 1 melts a thermoplastic resin, adds a reinforcing fiber in which a plurality of single fibers are twisted to form a roving, and kneads to obtain a fiber-reinforced thermoplastic resin. A molding method for obtaining a molded product from a reinforced thermoplastic resin, wherein the reinforcing fiber is obtained by adding a sizing agent added to the roving by removing a sizing agent by a predetermined removing means to the thermoplastic resin. It is comprised as a shaping | molding method which obtains a molded article from the fiber reinforced thermoplastic resin to do.
According to a second aspect of the present invention, in the molding method according to the first aspect, the removing means comprises a heating means for heating the roving and evaporating the sizing agent. It is configured as a molding method for obtaining a molded product.
According to a third aspect of the present invention, in the molding method according to the first or second aspect, the fiber-reinforced thermoplastic resin is kneaded by a plasticizing device including a cylinder and a screw. When the thermoplastic resin is melted and sent forward, a starvation section for lowering the resin pressure is provided in the plasticizer, and the reinforcing fiber is added in the starvation section. It is comprised as a shaping | molding method to obtain a molded article from.
The invention according to claim 4 is the molding method according to any one of claims 1 to 3, wherein the reinforcing fiber is cut into a predetermined length and added to the thermoplastic resin in advance. It is comprised as a shaping | molding method which obtains a molded article from the fiber reinforced thermoplastic resin to do.
そして、請求項５に記載の発明は、熱可塑性樹脂と複数本の単繊維が撚り合わされてロービングになっている強化繊維とから繊維強化熱可塑性樹脂を得、該繊維強化熱可塑性樹脂から成形品を成形する成形装置であって、前記成形装置は、所定のシリンダと該シリンダ内に設けられているスクリュとからなる可塑化装置と、ロービングに添加されている集束剤を除去する除去手段と、前記繊維強化熱強化樹脂から成形品を成形する金型とからなり、前記可塑化装置において、前記熱可塑性樹脂が投入されて溶融されて前方に送られて前記強化繊維が添加されるとき、前記強化繊維は前記除去手段によって前記ロービングから集束剤が除去された後に添加されるようになっていることを特徴とする繊維強化熱可塑性樹脂成形品の成形装置として構成される。
請求項６に記載の発明は、請求項５に記載の成形装置において、前記除去手段は前記ロービングを加熱して前記集束剤を蒸発させる加熱手段からなることを特徴とする繊維強化熱可塑性樹脂成形品の成形装置として構成される。
請求項７に記載の発明は、請求項５または６に記載の成形装置において、前記可塑化装置には溶融した樹脂の圧力が低下する飢餓区間が設けられ、前記強化繊維は前記飢餓区間において添加されるようになっていることを特徴とする繊維強化熱可塑性樹脂成形品の成形装置として構成される。
請求項８に記載の発明は、請求項５〜７のいずれかの項に記載の成形装置において、前記成形装置は所定の切断手段を備え、前記強化繊維は該切断手段によって所定の長さに切断して前記可塑化装置に供給されるようになっていることを特徴とする繊維強化熱可塑性樹脂成形品の成形装置として構成される。
According to a fifth aspect of the present invention, a fiber reinforced thermoplastic resin is obtained from a thermoplastic resin and a reinforcing fiber in which a plurality of single fibers are twisted to form a roving, and a molded product is obtained from the fiber reinforced thermoplastic resin. A molding apparatus for molding a plasticizing device comprising a predetermined cylinder and a screw provided in the cylinder, and a removing means for removing the sizing agent added to the roving, A mold for molding a molded product from the fiber-reinforced heat-reinforced resin, and in the plasticizing apparatus, when the thermoplastic resin is added and melted and sent forward, and the reinforcing fiber is added, The reinforcing fiber is added after the sizing agent is removed from the roving by the removing means, and is used as a molding apparatus for a fiber-reinforced thermoplastic resin molded product. It is made.
According to a sixth aspect of the present invention, in the molding apparatus according to the fifth aspect, the removing means comprises a heating means for heating the roving and evaporating the sizing agent. It is configured as a product molding device.
According to a seventh aspect of the present invention, in the molding apparatus according to the fifth or sixth aspect, the plasticizing apparatus is provided with a starvation section in which the pressure of the molten resin decreases, and the reinforcing fiber is added in the starvation section. It is comprised as a shaping | molding apparatus of the fiber reinforced thermoplastic resin molded product characterized by being configured.
The invention according to claim 8 is the molding apparatus according to any one of claims 5 to 7, wherein the molding apparatus includes a predetermined cutting means, and the reinforcing fiber has a predetermined length by the cutting means. It is configured as a molding device for a fiber-reinforced thermoplastic resin molded product, which is cut and supplied to the plasticizing device.
以上のように、本発明によると、熱可塑性樹脂を溶融し、複数本の単繊維が撚り合わされてロービングになっている強化繊維を添加し混練して繊維強化熱可塑性樹脂を得、該繊維強化熱可塑性樹脂から成形品を得る成形方法を対象としている。本発明によると、強化繊維は、ロービングに添加されている集束剤を所定の除去手段で除去したものを熱可塑性樹脂に添加するように構成されている。集束剤は、例えばエポキシ樹脂等からなり強化繊維の単繊維をバラバラにならないようにくっつけており、繊維強化熱可塑性樹脂中で強化繊維が均一にするのを妨げている。本発明はこの集束剤を除去した強化繊維を添加するようにするので、得られる繊維強化熱可塑性樹脂は高いレベルで強化繊維が均一に分散することになる。これによって成形される成形品は均一に強度が発現することになる。他の発明によると、除去手段はロービングを加熱して集束剤を蒸発させる加熱手段からなる。加熱手段はヒータやバーナー等のシンプルな装置から構成することができ、本発明を小コストで実施することができる。他の発明によると、繊維強化熱可塑性樹脂の混練はシリンダとスクリュとからなる可塑化装置によって実施するようにし、可塑化装置において熱可塑性樹脂を溶融して前方に送るとき、可塑化装置において樹脂圧力を低下させる飢餓区間を設けるようにし、強化繊維は飢餓区間において添加するように構成されている。このようにすると強化繊維を容易かつ安定的に熱可塑性樹脂に添加することができる。従って、品質の安定した繊維強化熱可塑性樹脂を得ることができ、品質が高い成形品を成形することができる。他の発明によると、強化繊維は予め所定の長さに切断して熱可塑性樹脂に添加するように構成される。予め切断して供給するので、繊維強化熱可塑性樹脂中において分散される強化繊維は長さのバラツキが少なくなるという効果が得られる。 As described above, according to the present invention, a thermoplastic resin is melted, and a reinforcing fiber in which a plurality of single fibers are twisted to form a roving is added and kneaded to obtain a fiber-reinforced thermoplastic resin. It is intended for a molding method for obtaining a molded product from a thermoplastic resin. According to the present invention, the reinforcing fiber is configured such that the sizing agent added to the roving is removed by a predetermined removing means and added to the thermoplastic resin. The sizing agent is made of, for example, an epoxy resin and sticks the single reinforcing fibers so as not to fall apart, and prevents the reinforcing fibers from being uniform in the fiber reinforced thermoplastic resin. In the present invention, the reinforcing fiber from which the sizing agent is removed is added, so that the reinforcing fiber is uniformly dispersed at a high level in the obtained fiber-reinforced thermoplastic resin. As a result, the molded product is uniformly developed in strength. According to another invention, the removal means comprises heating means for heating the roving and evaporating the sizing agent. The heating means can be composed of a simple device such as a heater or a burner, and the present invention can be implemented at a low cost. According to another invention, the fiber reinforced thermoplastic resin is kneaded by a plasticizing device composed of a cylinder and a screw, and when the thermoplastic resin is melted and sent forward in the plasticizing device, the resin is used in the plasticizing device. A starvation zone for reducing the pressure is provided, and the reinforcing fiber is configured to be added in the starvation zone. In this way, the reinforcing fiber can be easily and stably added to the thermoplastic resin. Therefore, it is possible to obtain a fiber-reinforced thermoplastic resin with stable quality, and to mold a molded product with high quality. According to another invention, the reinforcing fibers are preliminarily cut to a predetermined length and added to the thermoplastic resin. Since the fiber is cut and supplied in advance, the reinforcing fiber dispersed in the fiber-reinforced thermoplastic resin has an effect that the length variation is reduced.
本発明の実施の形態について説明する。本実施の形態に係る成形装置１は、図１に示されているように、熱可塑性樹脂を可塑化すると共に強化繊維を混合して繊維強化熱可塑性樹脂を得る可塑化装置２と、可塑化装置２に強化繊維を供給する強化繊維供給装置３と、所定量の繊維強化熱可塑性樹脂を圧縮成形して成形品を得る成形用金型４と、この成形用金型４を型締めする型締装置５とから構成されている。 Embodiments of the present invention will be described. As shown in FIG. 1, a molding apparatus 1 according to the present embodiment includes a plasticizing apparatus 2 that plasticizes a thermoplastic resin and mixes reinforcing fibers to obtain a fiber-reinforced thermoplastic resin. A reinforcing fiber supply device 3 for supplying reinforcing fibers to the device 2, a molding die 4 for compression molding a predetermined amount of fiber reinforced thermoplastic resin to obtain a molded product, and a die for clamping the molding die 4 And a fastening device 5.
可塑化装置２は、押出機から構成することもできるし、どのような種類の可塑化装置から構成することもできるが、本実施の形態においては射出成形機の射出装置が採用されている。すなわち射出装置は、加熱シリンダ７と、この加熱シリンダ７内で回転方向と軸方向とに駆動されるスクリュ８とからなり、加熱シリンダ７の後方寄りに熱可塑性樹脂が投入されるホッパ１０が設けられ、加熱シリンダ７の前方寄りに強化繊維を投入する強化繊維投入口１１が設けられている。スクリュ８はホッパ１０近傍から所定の位置まで可塑化区間１３になっており、フライト溝はホッパ１０近傍では深く、前方に向かって徐々に浅く形成され可塑化区間１３において樹脂が溶融しながら送られ、そして圧縮されるようになっている。可塑化区間１３の下流にシール区間１４が形成され、その下流に飢餓区間１６が形成されている。飢餓区間１６ではフライト溝が深くなっている。あるいはフライトのピッチが大きくなっている。これによって溶融樹脂の輸送力が大きくなって樹脂圧力が低下するようになっている。本実施の形態においてはこの飢餓区間１６が強化繊維投入口１１に対応しており、強化繊維は低い樹脂圧力の溶融樹脂に添加されるようになっている。飢餓区間１６の下流に樹脂圧力を高めて混練する圧縮区間１７が形成されている。 The plasticizing device 2 can be constituted by an extruder or any kind of plasticizing device, but in this embodiment, an injection device of an injection molding machine is employed. That is, the injection device includes a heating cylinder 7 and a screw 8 that is driven in the rotation direction and the axial direction within the heating cylinder 7, and a hopper 10 into which a thermoplastic resin is charged is provided near the rear of the heating cylinder 7. In addition, a reinforcing fiber input port 11 for supplying reinforcing fibers to the front side of the heating cylinder 7 is provided. The screw 8 is a plasticizing section 13 from the vicinity of the hopper 10 to a predetermined position, and the flight groove is formed deep in the vicinity of the hopper 10 and gradually shallows forward, and is sent while the resin melts in the plasticizing section 13. , And it comes to be compressed. A seal section 14 is formed downstream of the plasticizing section 13, and a starvation section 16 is formed downstream thereof. In the hunger section 16, the flight groove is deep. Or the flight pitch is getting bigger. As a result, the transport force of the molten resin is increased and the resin pressure is lowered. In the present embodiment, the starvation section 16 corresponds to the reinforcing fiber inlet 11, and the reinforcing fiber is added to the molten resin having a low resin pressure. A compression section 17 is formed downstream of the starvation section 16 for kneading by increasing the resin pressure.
強化繊維供給装置３は本実施の形態に係る成形装置１において特徴的な装置であり、ロープ状の強化繊維束すなわちロービングがロール状に巻かれている強化繊維ロール１９と、この強化繊維ロール１９から引き出されたロービングが通されて該ロービングに添加されている集束剤を除去するようになっている除去装置２０と、集束剤が除去されてバラバラになった強化繊維を所定長さに切断する切断装置２１とから構成されている。除去装置２０は本発明において重要な装置であり、ロービングから集束剤を除去するようになっていればどのような手段から構成されていてもよい。集束剤は例えばエポキシ系樹脂からなるので、ロービングに有機溶剤のアセトンを噴射して集束剤を除去するような化学的手段から構成してもよい。またはロービングをバーナー等により直接あぶって集束剤を蒸発させるような加熱手段から構成してもよい。本実施の形態においては、除去装置２０として加熱手段の一種である電気炉が採用されている。電気炉には環状の通路２０ａが設けられ、ロービングがこの通路２０ａを通るときに３００〜４５０℃に加熱されて集束剤が蒸発するようになっている。切断装置２１はカッターから構成され、強化繊維を一定の長さに切断する。切断装置２１は強化繊維投入口１１の上方に設けられているので、切断された強化繊維は加熱シリンダ７内に投入されるようになっている。 The reinforcing fiber supply device 3 is a characteristic device in the molding apparatus 1 according to the present embodiment, and includes a reinforcing fiber roll 19 in which a rope-like reinforcing fiber bundle, that is, a roving is wound in a roll shape, and the reinforcing fiber roll 19. The removing device 20 is configured to remove the sizing agent added to the roving through the roving extracted from the roving, and the reinforcing fiber which has been separated by removing the sizing agent is cut into a predetermined length. The cutting device 21 is configured. The removing device 20 is an important device in the present invention, and may be composed of any means as long as it removes the sizing agent from roving. Since the sizing agent is made of, for example, an epoxy resin, the sizing agent may be composed of chemical means such as spraying organic solvent acetone onto the roving to remove the sizing agent. Alternatively, the roving may be directly heated by a burner or the like to constitute a heating means for evaporating the sizing agent. In the present embodiment, an electric furnace which is a kind of heating means is employed as the removing device 20. The electric furnace is provided with an annular passage 20a, and when the roving passes through this passage 20a, it is heated to 300 to 450 ° C. to evaporate the sizing agent. The cutting device 21 is composed of a cutter, and cuts the reinforcing fiber into a certain length. Since the cutting device 21 is provided above the reinforcing fiber input port 11, the cut reinforcing fibers are input into the heating cylinder 7.
本実施の形態において成形用金型４は、型開き状態で繊維強化熱可塑性樹脂が射出され、その後圧縮する圧縮成形用の金型からなる。この成形用金型４を型締めする型締装置５はトグル機構によって、あるいは型締シリンダによって型締めするようになっている。成形用金型４には成形品を成形するキャビティが形成されており、成形用金型４の側方に設けられているスプルから樹脂が射出されるようになっている。このスプルに可塑化装置２のノズル２３が当接している。 In the present embodiment, the molding die 4 is a compression molding die in which a fiber-reinforced thermoplastic resin is injected in a mold open state and then compressed. The mold clamping device 5 for clamping the molding die 4 is clamped by a toggle mechanism or a clamping cylinder. A cavity for molding a molded product is formed in the molding die 4, and resin is injected from a sprue provided on the side of the molding die 4. The nozzle 23 of the plasticizing apparatus 2 is in contact with this sprue.
本実施の形態に係る成形装置１によって、繊維強化熱可塑性樹脂を得、成形品を成形する成形方法を説明する。可塑化装置２すなわち射出装置において加熱シリンダ７を図に示されていないヒータによって加熱し、スクリュ８を回転してホッパ１０から熱可塑性樹脂のペレットを投入する。ペレットは加熱シリンダ７の可塑化区間１３において溶融して次第に圧縮されながら前方に送られる。溶融した樹脂はシール区間１４を経て飢餓区間１６に送られる。これと並行して強化繊維供給装置３から強化繊維を供給する。すなわち強化繊維ロール１９から炭素繊維等の強化繊維からなるロービングが引き出され、除去装置２０において加熱されて集束剤が除去される。図２の左側の写真には集束剤が添加されている強化繊維が示されており、右側の写真には集束剤が除去された強化繊維が示されているが、集束剤が除去されると強化繊維同士がバラバラになる様子が分かる。バラバラになった強化繊維は切断装置２１によって所定の長さに切断され強化繊維投入口１１から投入される。飢餓区間１６では樹脂圧力が小さくなっているので切断された強化繊維は容易に樹脂に添加される。スクリュ８の回転によって混練され、圧縮区間１７を経てスクリュ８の前方に計量される。すなわち繊維強化熱可塑性樹脂が計量される。繊維強化熱可塑性樹脂中において、強化繊維は均一に分散することになる。型締装置５により成形用金型４を若干開いた状態にする。スクリュ８を軸方向に駆動して射出する。そうすると図１に示されているように繊維強化熱可塑性樹脂が所定量だけ成形用金型４のキャビティに射出される。型締装置５を駆動して圧縮成形する。成形品が固化したら成形用金型４を型開きして成形品を取り出す。以下同様にして成形する。 A molding method for obtaining a fiber-reinforced thermoplastic resin and molding a molded product by the molding apparatus 1 according to the present embodiment will be described. In the plasticizing apparatus 2, that is, the injection apparatus, the heating cylinder 7 is heated by a heater (not shown), the screw 8 is rotated, and pellets of thermoplastic resin are introduced from the hopper 10. The pellets are fed forward while being melted and gradually compressed in the plasticizing section 13 of the heating cylinder 7. The molten resin is sent to the starvation section 16 through the seal section 14. In parallel with this, the reinforcing fibers are supplied from the reinforcing fiber supply device 3. That is, rovings made of reinforcing fibers such as carbon fibers are drawn from the reinforcing fiber roll 19 and heated in the removing device 20 to remove the sizing agent. The left photograph in FIG. 2 shows the reinforcing fiber to which the sizing agent has been added, and the right photograph shows the reinforcing fiber from which the sizing agent has been removed. You can see how the reinforcing fibers are separated. The separated reinforcing fibers are cut into a predetermined length by the cutting device 21 and fed from the reinforcing fiber inlet 11. Since the resin pressure is reduced in the starvation section 16, the cut reinforcing fibers are easily added to the resin. It is kneaded by the rotation of the screw 8, and weighed in front of the screw 8 through the compression section 17. That is, the fiber reinforced thermoplastic resin is weighed. In the fiber reinforced thermoplastic resin, the reinforcing fibers are uniformly dispersed. The mold 4 is slightly opened by the mold clamping device 5. The screw 8 is driven in the axial direction and injected. Then, as shown in FIG. 1, a predetermined amount of fiber-reinforced thermoplastic resin is injected into the cavity of the molding die 4. The mold clamping device 5 is driven to perform compression molding. When the molded product is solidified, the molding die 4 is opened and the molded product is taken out. Thereafter, molding is performed in the same manner.
本実施の形態に係る成形方法を実施すると、強化繊維が高いレベルで均一に樹脂中に分散することを確認するため実験を行った。
実験方法：Ｎｉメッキを施した炭素繊維と通常の炭素繊維とを混合してエポキシ系樹脂からなる集束剤を添加して撚り合わせロービングを得た。Ｎｉメッキを施した炭素繊維は、全炭素繊維に対して２％になるようにした。このようなロービングからなる炭素繊維を使用して本実施の形態に係る成形方法により成形品Ａを成形した。すなわちロービングを３００〜４５０℃に加熱して集束剤を蒸発させ切断して溶融樹脂と混練して繊維強化熱可塑性樹脂を得、これを射出し圧縮成形して成形品を得た。成形品は３００ｍｍ×３００ｍｍ×３ｍｍの平板とした。なお、添加した炭素繊維は繊維強化熱可塑性樹脂に対して３０％の体積になるようにした。一方、ロービングに対して集束剤の除去はしないようにし、他の点は成形品Ａの成形と同様の条件によって成形品Ｂを得た。つまり成形品Ｂは集束剤が付着したままの炭素繊維から成形されたことになる。成形品Ａ、ＢについてＸ線写真を撮り、それぞれ図３、図４の写真を得た。
考察：図３、４の写真において糸状に見える繊維がＮｉメッキされている炭素繊維である。集束剤を除去した炭素繊維を添加して成形した成形品Ａは、図３の写真に示されているように、強化繊維の太さが細い。このことは単繊維同士がバラバラに分散していることを意味している。また写真において強化繊維は黒く、樹脂の部分は白っぽく撮影されるが、成形品Ａは全体として濃淡が均一になっており強化繊維が高いレベルで均一に分散している様子が確認できた。これに対して、集束剤を除去せずに炭素繊維を添加して成形した成形品Ｂは、図４の写真に示されているように、強化繊維の太さが太い。つまり単繊維同士が固まっていて太い状態であることが分かる。つまり分散は不十分である。また成形品Ｂは、全体において濃淡に偏りがあり、強化繊維の分散が不均一になっていることが分かる。この実験により、繊維強化熱可塑性樹脂を得るとき、強化繊維を樹脂に添加するときに、予め強化繊維から集束剤を除去するようにすると、得られる繊維強化熱可塑性樹脂において強化繊維が高いレベルで均一に分散することが確認できた。
When the molding method according to the present embodiment was implemented, an experiment was conducted to confirm that the reinforcing fibers were uniformly dispersed in the resin at a high level.
Experimental method: Ni-plated carbon fiber and normal carbon fiber were mixed and a sizing agent composed of an epoxy resin was added to obtain a twisted roving. The carbon fiber subjected to Ni plating was adjusted to 2% with respect to the total carbon fiber. A molded product A was molded by the molding method according to the present embodiment using carbon fibers made of such roving. That is, the roving was heated to 300 to 450 ° C. to evaporate and cut the sizing agent and kneaded with the molten resin to obtain a fiber reinforced thermoplastic resin, which was injected and compression molded to obtain a molded product. The molded product was a flat plate of 300 mm × 300 mm × 3 mm. The added carbon fiber was adjusted to a volume of 30% with respect to the fiber reinforced thermoplastic resin. On the other hand, the sizing agent was not removed with respect to roving, and the molded product B was obtained under the same conditions as the molding of the molded product A in other respects. That is, the molded product B is molded from the carbon fiber with the sizing agent attached. X-ray photographs of the molded products A and B were taken, and the photographs of FIGS. 3 and 4 were obtained, respectively.
Consideration: The fibers that look like threads in the photographs of FIGS. 3 and 4 are carbon fibers plated with Ni. As shown in the photograph of FIG. 3, the molded product A formed by adding the carbon fiber from which the sizing agent has been added has a thin reinforcing fiber. This means that the single fibers are dispersed apart. In the photograph, the reinforcing fibers were black and the resin portion was photographed whitish. However, it was confirmed that the molded product A was uniformly shaded as a whole, and the reinforcing fibers were uniformly dispersed at a high level. On the other hand, in the molded product B formed by adding carbon fiber without removing the sizing agent, the reinforcing fiber is thick as shown in the photograph of FIG. That is, it can be seen that the single fibers are hardened and in a thick state. In other words, dispersion is insufficient. Moreover, as for the molded product B, it turns out that the density is uneven in the whole, and dispersion | distribution of a reinforced fiber is nonuniform. According to this experiment, when the fiber reinforced thermoplastic resin is obtained, when the reinforcing fiber is added to the resin, if the sizing agent is previously removed from the reinforcing fiber, the reinforcing fiber is at a high level in the obtained fiber reinforced thermoplastic resin. It was confirmed that the particles were uniformly dispersed.
本実施の形態に係る成形装置１は色々な変形が可能である。例えば可塑化装置２は、既に説明したように押出機に置き換えることができる。押出機については単軸スクリュからなる単軸押出機から実施することもできるし、２軸スクリュからなる２軸押出機から実施することもできる。押出機によって実施する場合には、繊維強化熱可塑性樹脂を所定量だけ押し出して切断して塊状成形物とし、これを成形用金型４のキャビティに搬送して圧縮成形することになる。可塑化装置２についてはプランジャ式射出装置を使用する変形も可能である。成形方法も変形が可能であり、本実施の形態においては圧縮成形するように説明したが、型締めした成形用金型４に射出するようにしてもよい。他の点について変形も可能である。例えば供給する強化繊維についても変形することができる。炭素繊維に変えてガラス繊維や他の強化繊維を使用することができる。本実施の形態においては強化繊維を強化繊維投入口１１に投入するとき、切断装置２１により切断して投入しているが、切断せずに投入してもよい。切断せずに強化繊維を投入するとスクリュ８の回転によるせん断力で加熱シリンダ７内で強化繊維が切断されることになる。強化繊維投入口１１についても変形が可能であり、サイドフィーダ等を設けて、強化繊維を供給してもよい。そうすると、強化繊維の供給量を容易に一定にできるので熱可塑性樹脂に混練する強化繊維の割合を一定にすることができる。 The molding apparatus 1 according to this embodiment can be variously modified. For example, the plasticizing device 2 can be replaced by an extruder as already described. About an extruder, it can also implement from the single screw extruder which consists of a single screw, and can also implement from the twin screw extruder which consists of a twin screw. In the case of carrying out by an extruder, a predetermined amount of the fiber reinforced thermoplastic resin is extruded and cut into a massive molded product, which is conveyed to the cavity of the molding die 4 and compression molded. The plasticizing device 2 can be modified using a plunger type injection device. The molding method can also be modified, and in the present embodiment, the compression molding is described. However, the molding method may be injected into the molding die 4 that has been clamped. Variations are possible for other points. For example, the reinforcing fiber to be supplied can be deformed. Glass fibers and other reinforcing fibers can be used instead of carbon fibers. In the present embodiment, when the reinforcing fiber is input to the reinforcing fiber input port 11, it is cut and input by the cutting device 21, but may be input without being cut. If the reinforcing fiber is introduced without being cut, the reinforcing fiber is cut in the heating cylinder 7 by the shearing force generated by the rotation of the screw 8. The reinforcing fiber inlet 11 can also be modified, and a reinforcing fiber may be supplied by providing a side feeder or the like. Then, since the supply amount of the reinforcing fiber can be easily made constant, the ratio of the reinforcing fiber kneaded with the thermoplastic resin can be made constant.
１ 成形装置 ２ 可塑化装置
３ 強化繊維供給装置 ４ 成形用金型
５ 型締装置 ７ 加熱シリンダ
８ スクリュ １０ ホッパ
１１ 強化繊維投入口 １３ 可塑化区間
１４ シール区間 １６ 飢餓区間
１７ 圧縮区間 １９ 強化繊維ロール
２０ 除去装置 ２１ 切断装置
２３ ノズル
DESCRIPTION OF SYMBOLS 1 Molding apparatus 2 Plasticizing apparatus 3 Reinforcing fiber supply apparatus 4 Mold for mold 5 Clamping apparatus 7 Heating cylinder 8 Screw 10 Hopper 11 Reinforcing fiber inlet 13 Plasticizing section 14 Sealing section 16 Starvation section 17 Compression section 19 Reinforcing fiber roll 20 Removal device 21 Cutting device 23 Nozzle
Claims (8)
前記強化繊維は、前記ロービングに添加されている集束剤を所定の除去手段で除去したものを前記熱可塑性樹脂に添加することを特徴とする繊維強化熱可塑性樹脂から成形品を得る成形方法。 A molding method for melting a thermoplastic resin, adding a reinforcing fiber in which a plurality of single fibers are twisted together to form a roving, kneading to obtain a fiber-reinforced thermoplastic resin, and obtaining a molded product from the fiber-reinforced thermoplastic resin Because
A molding method for obtaining a molded product from a fiber reinforced thermoplastic resin, wherein the reinforcing fiber is obtained by adding a sizing agent added to the roving to the thermoplastic resin after being removed by a predetermined removing means.
前記成形装置は、所定のシリンダと該シリンダ内に設けられているスクリュとからなる可塑化装置と、ロービングに添加されている集束剤を除去する除去手段と、前記繊維強化熱強化樹脂から成形品を成形する金型とからなり、
前記可塑化装置において、前記熱可塑性樹脂が投入されて溶融されて前方に送られて前記強化繊維が添加されるとき、前記強化繊維は前記除去手段によって前記ロービングから集束剤が除去された後に添加されるようになっていることを特徴とする繊維強化熱可塑性樹脂成形品の成形装置。 A molding apparatus for obtaining a fiber-reinforced thermoplastic resin from a thermoplastic resin and a reinforcing fiber in which a plurality of single fibers are twisted together to form a roving, and molding a molded product from the fiber-reinforced thermoplastic resin,
The molding apparatus comprises a plasticizing apparatus comprising a predetermined cylinder and a screw provided in the cylinder, a removing means for removing a sizing agent added to the roving, and a molded product from the fiber-reinforced heat-reinforced resin. It consists of a mold that molds
In the plasticizer, when the thermoplastic resin is charged and melted and sent forward and the reinforcing fiber is added, the reinforcing fiber is added after the sizing agent is removed from the roving by the removing means. An apparatus for molding a fiber-reinforced thermoplastic resin molded product, wherein
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