JP2001277328A - Apparatus and method for manufacturing thermoplastic resin molding - Google Patents

Apparatus and method for manufacturing thermoplastic resin molding

Info

Publication number
JP2001277328A
JP2001277328A JP2000094748A JP2000094748A JP2001277328A JP 2001277328 A JP2001277328 A JP 2001277328A JP 2000094748 A JP2000094748 A JP 2000094748A JP 2000094748 A JP2000094748 A JP 2000094748A JP 2001277328 A JP2001277328 A JP 2001277328A
Authority
JP
Japan
Prior art keywords
thermoplastic resin
resin composition
pressure gas
molding machine
area
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
Application number
JP2000094748A
Other languages
Japanese (ja)
Inventor
Koji Ichihara
幸治 市原
Kozo Makino
耕三 牧野
Toshio Inamori
俊夫 稲守
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sekisui Chemical Co Ltd
Original Assignee
Sekisui Chemical Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sekisui Chemical Co Ltd filed Critical Sekisui Chemical Co Ltd
Priority to JP2000094748A priority Critical patent/JP2001277328A/en
Publication of JP2001277328A publication Critical patent/JP2001277328A/en
Pending legal-status Critical Current

Links

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
    • B29B7/46—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft
    • 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
    • B29B7/58—Component parts, details or accessories; Auxiliary operations
    • B29B7/60—Component parts, details or accessories; Auxiliary operations for feeding, e.g. end guides for the incoming material
    • 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
    • B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
    • B29B7/7404—Mixing devices specially adapted for foamable substances
    • B29B7/7409—Mixing devices specially adapted for foamable substances with supply of gas
    • 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
    • B29B7/80—Component parts, details or accessories; Auxiliary operations
    • B29B7/86—Component parts, details or accessories; Auxiliary operations for working at sub- or superatmospheric pressure
    • 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
    • B29C48/295—Feeding the extrusion material to the extruder in gaseous form
    • 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
    • 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
    • B29B7/80—Component parts, details or accessories; Auxiliary operations
    • B29B7/88—Adding charges, i.e. additives
    • B29B7/90—Fillers or reinforcements, e.g. fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • 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
    • 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
    • B29C48/297—Feeding the extrusion material to the extruder at several locations, e.g. using several hoppers or using a separate additive feeding
    • 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
    • B29C48/63—Screws having sections without mixing elements or threads, i.e. having cylinder shaped sections
    • 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
    • B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus and a method for manufacturing a resin molding capable of completely dissolving a high-pressure gas in a powder particle thermoplastic resin within a residence time of a molding machine, easily fluidizing and low- temperature molding a resin difficult to be melt extruded with a high melt viscosity or molding retardant resin easy to be thermally decomposed or manufacturing a foamed material. SOLUTION: The apparatus 1 for manufacturing a thermoplastic resin molding comprises a molding machine 11 having a screw 112 arranged in a cylinder 111, a raw material supply unit 12, a highpressure gas supply unit 13, a mold 14 connected to the machine, a supply region 1A for transporting the powder particle resin composition to a downstream of the machine, a means 131 provided at a volume increasing part of the downstream side of the region 1A to fill the gas in the resin composition, an oppressing region 1B for mixing the resin composition with the gas to densify the mixture, a metering region 1C for metering a mixture of the densified mixture of the resin composition and the gas, and a substantially impermeable closed region 1D formed between the material supply unit and the supply region of the machine for passage of the gas. In this case, a screw bearing 15 of the machine is formed in a pressure-resistant sealing structure.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は熱可塑性樹脂成形体
の製造装置及び製造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and a method for producing a thermoplastic resin molded article.

【０００２】[0002]

【従来の技術】押出機に供給された熱可塑性樹脂中に液
体或いは気体の発泡剤を注入した後、押出機の先端に装
着された金型より前記樹脂を押出すことにより樹脂発泡
体を製造する方法は古くから知られている。この場合、
押出機に供給された熱可塑性樹脂への発泡剤の溶解速度
を高める方法として、例えば、特公平１−４２８１７号
公報には、押出機のスクリューを２段にして、１段目に
円錐状の圧迫部分および閉塞部分を設けて粉粒状樹脂を
高密化することによって発泡剤の上流への漏洩を防止
し、２段目で固体状の樹脂に発泡剤を溶解させた後、樹
脂の溶融を行う方法が提案されており、この方法によっ
て、比較的低温度で固体状樹脂に発泡剤を溶解させて熱
可塑性樹脂発泡体を連続的に製造することができるとさ
れている。2. Description of the Related Art A resin foam is produced by injecting a liquid or gaseous foaming agent into a thermoplastic resin supplied to an extruder, and extruding the resin from a mold attached to the tip of the extruder. How to do it has been known for a long time. in this case,
As a method for increasing the dissolution rate of the foaming agent in the thermoplastic resin supplied to the extruder, for example, Japanese Patent Publication No. 1-42817 discloses that the extruder is provided with a two-stage screw and a conical shape in the first stage. The compression part and the closed part are provided to prevent the leakage of the foaming agent to the upstream by increasing the density of the granular resin, and the resin is melted after dissolving the foaming agent in the solid resin in the second stage. It has been proposed that a method can be used to continuously produce a thermoplastic resin foam by dissolving a foaming agent in a solid resin at a relatively low temperature.

【０００３】[0003]

【発明が解決しようとする課題】しかしながら、上記公
報に記載の方法の場合、押出機のスクリューの１段目の
圧迫部分および閉塞部分において剪断発熱が生じ、その
ために樹脂の一部が溶融してしまい、２段目では一部溶
融した樹脂に発泡剤を溶解させることになることが判明
した。熱可塑性樹脂への高圧ガスの含浸速度は、温度が
低温で一定の場合、樹脂の粒径に著しく依存し、粒径が
数十〜数百ミクロンの粉粒状樹脂では数分で含浸出来る
が、粒径が数ミリのペレット状樹脂では含浸に数時間か
かることが知られている。すなわち、高圧ガスの含浸速
度は含浸距離に大きく依存する。また、高圧ガスの含浸
速度は拡散係数に大きく依存し、拡散係数は温度が高く
なると指数的に上昇することが知られている。However, in the case of the method described in the above publication, shearing heat is generated in the first stage pressing portion and the closing portion of the screw of the extruder, so that a part of the resin is melted. In the second stage, it has been found that the foaming agent is dissolved in the partially melted resin. The impregnation rate of the high-pressure gas into the thermoplastic resin depends on the particle size of the resin when the temperature is constant at a low temperature, and can be impregnated in a few minutes with a powdery resin having a particle size of tens to hundreds of microns, It is known that impregnation takes several hours with a pellet-shaped resin having a particle size of several millimeters. That is, the impregnation rate of the high-pressure gas greatly depends on the impregnation distance. It is also known that the impregnation rate of the high-pressure gas greatly depends on the diffusion coefficient, and the diffusion coefficient increases exponentially as the temperature increases.

【０００４】従って、上記方法の場合、樹脂が一部溶融
するにも拘わらず、低温で高圧ガスの供給を行っている
ため、一部溶融した樹脂への発泡剤の溶解が律速にな
り、押出機の限られた滞留時間内で樹脂中へ発泡剤を完
全に溶解させることが困難となる。また、高圧ガスを熱
可塑性樹脂組成物中へ含浸することにより、熱可塑性樹
脂組成物の粘度やガラス転移温度を低下させることが出
来ることが知られている。しかしながら、特公平１−４
２８１７号公報に記載の方法では、ガスを供給する前の
上流部において、上記の粘度低下効果は発現しない。こ
のため、剪断発熱を回避するのが困難なことは上述の通
りである。Accordingly, in the above method, since the high-pressure gas is supplied at a low temperature even though the resin is partially melted, the dissolution of the foaming agent into the partially melted resin becomes rate-determining, and the extrusion is difficult. It becomes difficult to completely dissolve the blowing agent into the resin within the limited residence time of the machine. It is also known that the viscosity and glass transition temperature of a thermoplastic resin composition can be reduced by impregnating the thermoplastic resin composition with a high-pressure gas. However, Tokiwa 1-4
In the method described in Japanese Patent No. 2817, the above-described effect of lowering the viscosity is not exhibited in the upstream portion before the gas is supplied. As described above, it is difficult to avoid shear heat generation.

【０００５】本発明は、上記従来の技術の問題点を解消
し、確実に固体状態の樹脂に高圧ガスを溶解させ、成形
機の限られた滞留時間内で樹脂中へ高圧ガスを完全に溶
解させることにより、溶融粘度が高くて溶融押出が困難
な樹脂や熱分解しやすい樹脂等のいわゆる難成形樹脂の
易流動化・低温成形化や、発泡体の製造が可能となる熱
可塑性樹脂成形体の製造装置及び製造方法を提供するこ
とを目的としてなされたものである。[0005] The present invention solves the above-mentioned problems of the prior art, reliably dissolves a high-pressure gas in a solid-state resin, and completely dissolves the high-pressure gas into the resin within a limited residence time of a molding machine. This makes it possible to make fluidized and low-temperature molding of so-called difficult-to-mold resins, such as resins with high melt viscosity and difficult to melt-extrude and resins that are easily decomposed, and to manufacture foams. The purpose of the present invention is to provide a manufacturing apparatus and a manufacturing method.

【０００６】[0006]

【課題を解決するための手段】上記目的を達成するため
に、請求項１記載の本発明は、シリンダー内にスクリュ
ーが配設された成形機と、該成形機の上流側に接続され
た粉粒状熱可塑性樹脂組成物を供給する原料供給装置
と、前記シリンダーの中途に接続された高圧ガス供給装
置と、前記成形機の下流側に接続された賦形装置とから
なる熱可塑性樹脂成形体の製造装置であって、前記原料
供給装置と前記成形機の供給区域との間に形成された高
圧ガスの通過に対して実質的に不透性である閉塞区域、
前記粉粒状熱可塑性樹脂組成物を成形機下流へ輸送する
供給区域、該供給区域の下流側の容積増大部に設けられ
た粉粒状熱可塑性樹脂組成物に高圧ガスを注入する高圧
ガス供給手段、前記粉粒状熱可塑性樹脂組成物と高圧ガ
スとを混合し高密化する圧迫区域、及び、前記高密化さ
れた樹脂組成物と高圧ガスとの混合物を計量する計量区
域を備えており、且つ前記成形機のスクリュー軸受部が
耐圧シール構造となされている熱可塑性樹脂成形体の製
造装置を提供する。To achieve the above object, according to the present invention, there is provided a molding machine in which a screw is provided in a cylinder, and a powder connected to an upstream side of the molding machine. A raw material supply device for supplying a granular thermoplastic resin composition, a high-pressure gas supply device connected in the middle of the cylinder, and a forming device connected downstream of the molding machine. A manufacturing apparatus, wherein the closed area is substantially impermeable to the passage of high-pressure gas formed between the raw material supply apparatus and the supply area of the molding machine;
A supply area for transporting the granular thermoplastic resin composition downstream of the molding machine, a high-pressure gas supply means for injecting a high-pressure gas into the granular thermoplastic resin composition provided in the volume increasing portion on the downstream side of the supply area, A compression section for mixing and compacting the powdery and granular thermoplastic resin composition and the high-pressure gas, and a measuring section for measuring a mixture of the high-density resin composition and the high-pressure gas, and the molding Provided is an apparatus for manufacturing a thermoplastic resin molded product in which a screw bearing portion of a machine has a pressure-resistant seal structure.

【０００７】又、請求項２記載の本発明は、シリンダー
内にスクリューが配設された押出成形機と、該押出成形
機の上流側に接続された粉粒状熱可塑性樹脂組成物を供
給する原料供給装置と、前記シリンダーの中途に接続さ
れた高圧ガス供給装置と、前記押出成形機の下流側に接
続された賦形装置とからなる熱可塑性樹脂成形体の製造
装置であって、前記原料供給装置と前記押出成形機の供
給区域との間に形成された高圧ガスの通過に対して実質
的に不透性である閉塞区域、前記粉粒状熱可塑性樹脂組
成物を押出成形機下流へ輸送する供給区域、該供給区域
の下流側の容積増大部に設けられた粉粒状熱可塑性樹脂
組成物に高圧ガスを注入する高圧ガス供給手段、前記粉
粒状熱可塑性樹脂組成物と高圧ガスとを混合し高密化す
る圧迫区域、前記高密化された樹脂組成物と高圧ガスと
の混合物を計量する計量区域、及び、前記押出成形機の
樹脂吐出側にスクリュー軸受部を備えていることを特徴
とする熱可塑性樹脂成形体の製造装置を提供する。The present invention according to claim 2 provides an extruder in which a screw is provided in a cylinder, and a raw material for supplying a granular thermoplastic resin composition connected upstream of the extruder. An apparatus for manufacturing a thermoplastic resin article, comprising: a supply device, a high-pressure gas supply device connected in the middle of the cylinder, and a shaping device connected downstream of the extruder. A closed area substantially impermeable to the passage of high-pressure gas formed between the apparatus and the feed area of the extruder, for transporting the particulate thermoplastic resin composition downstream of the extruder A supply section, high-pressure gas supply means for injecting a high-pressure gas into the granular thermoplastic resin composition provided in the volume increasing portion on the downstream side of the supply section, and mixing the high-pressure gas with the granular thermoplastic resin composition Compression area to increase density A measuring apparatus for measuring a mixture of a densified resin composition and a high-pressure gas, and a device for manufacturing a thermoplastic resin article, comprising: a screw bearing portion on a resin discharge side of the extruder. I will provide a.

【０００８】又、請求項３記載の本発明は、上記原料供
給装置に、上記粉粒状熱可塑性樹脂組成物を上記成形機
の供給区域に強制的に供給する送り機構が設けられてお
り、上記閉塞区域における高圧ガスの不透性が前記送り
機構による粉粒状熱可塑性樹脂組成物輸送量と前記成形
機の供給区域による粉粒状熱可塑性樹脂組成物輸送量の
比によって制御されるようになされている請求項１又は
２記載の熱可塑性樹脂成形体の製造装置を提供する。According to a third aspect of the present invention, the raw material supply device is provided with a feed mechanism for forcibly supplying the granular thermoplastic resin composition to a supply area of the molding machine. The impermeability of the high-pressure gas in the closed area is controlled by the ratio of the transport amount of the particulate thermoplastic resin composition by the feed mechanism and the transport amount of the particulate thermoplastic resin composition by the supply area of the molding machine. An apparatus for manufacturing a thermoplastic resin article according to claim 1 or 2.

【０００９】又、請求項４記載の本発明は、請求項１〜
３いずれか１項記載の熱可塑性樹脂成形体の製造装置を
用いて熱可塑性樹脂成形体を製造する方法であって、粉
粒状熱可塑性樹脂組成物を上記原料供給装置より上記成
形機の供給区域に搬送する際、該樹脂組成物を該原料供
給装置の送り機構により高密度化することによって、前
記成形機の供給区域の下流側に供給される高圧ガスの通
過に対して実質的に不透性の連続的に移動する障壁を形
成し、該障壁の下流側の容積増大部において、前記粉粒
状熱可塑性樹脂組成物中に高圧ガスを供給し混合した
後、溶融し、次いで前記成形機の下流側に接続された賦
形装置によって、得られた溶融混合物を賦形する熱可塑
性樹脂成形体の製造方法を提供する。Further, the present invention described in claim 4 has the following features.
3. A method for producing a thermoplastic resin molded article using the apparatus for producing a thermoplastic resin molded article according to any one of 3), wherein the powdery thermoplastic resin composition is supplied from the raw material supply apparatus to a supply area of the molding machine. When the resin composition is conveyed, the resin composition is densified by the feed mechanism of the raw material supply device, so that the high pressure gas supplied downstream of the supply area of the molding machine is substantially impermeable. A high-pressure gas is supplied and mixed into the powdery thermoplastic resin composition at the volume increasing portion on the downstream side of the barrier, followed by melting, and then forming the barrier of the molding machine. Provided is a method for producing a thermoplastic resin molded article that shapes the obtained molten mixture by using a shaping device connected on the downstream side.

【００１０】又、請求項５記載の本発明は、粉粒状熱可
塑性樹脂組成物を上記原料供給装置より上記成形機の供
給区域に搬送する輸送量Ｑ1 と、前記成形機の供給区域
による粉粒状熱可塑性樹脂組成物の輸送量Ｑ2 との比、
（Ｑ1 ／Ｑ2 ）が２. ０〜６. ０の範囲を満たすことを
特徴とする請求項４記載の熱可塑性樹脂成形体の製造方
法を提供する。According to a fifth aspect of the present invention, there is provided a method for transporting a powdery or granular thermoplastic resin composition from the raw material supply device to a supply area of the molding machine, comprising: The ratio with the transport amount Q2 of the thermoplastic resin composition,
The method for producing a thermoplastic resin article according to claim 4, wherein (Q1 / Q2) satisfies the range of 2.0 to 6.0.

【００１１】以下、本発明を更に詳細に説明する。本発
明に使用される成形機としては、例えば、押出成形機、
射出成形機などが挙げられる。押出成形機（以下、単に
押出機と言う場合がある）としては、１軸または２軸以
上のものが用いられ、２軸の場合は、スクリューーの回
転方向が同方向でも異方向でもよく、軸のタイプはパラ
レルタイプでもコニカルタイプでも良い。射出成形機と
は、加熱装置を備えたシリンダーと、スクリューの回転
運動により樹脂原料を計量、溶融する機構と、スクリュ
ーの前後運動により溶融した樹脂原料を型内に射出する
機構を備えた成形機をいう。Hereinafter, the present invention will be described in more detail. As the molding machine used in the present invention, for example, an extrusion molding machine,
An injection molding machine and the like can be mentioned. As an extruder (hereinafter sometimes simply referred to as an extruder), a single-screw or two-screw or more is used. In the case of a twin-screw, the rotation direction of a screw may be the same direction or a different direction. May be a parallel type or a conical type. An injection molding machine is a molding machine equipped with a cylinder equipped with a heating device, a mechanism for measuring and melting the resin material by the rotational movement of the screw, and a mechanism for injecting the molten resin material into the mold by the back and forth movement of the screw. Say.

【００１２】本発明において、高圧ガスを形成するガス
としては、常温常圧で気体状態の有機或いは無機物質で
あって、高温・高圧下で樹脂への含浸性が良好で、樹脂
を劣化させないものであれば特に限定されずに使用でき
る。ガスは常温・常圧で気体状態の為、使用後、容易に
樹脂中から除去することが可能である。また火災、爆発
等の危険がなく、環境、作業者の健康に対して安全で回
収が容易なガスが望ましい。このようなガスとしては、
例えば、二酸化炭素、窒素、アルゴン、ネオン、ヘリウ
ム、酸素等の無機ガスや、フロンガス、低分子量の炭化
水素等の有機ガスが挙げられるが、用いる樹脂に最も含
浸するものが好ましく選択される。In the present invention, the gas forming the high-pressure gas is an organic or inorganic substance which is in a gaseous state at normal temperature and normal pressure and has good impregnating property at high temperature and high pressure without deteriorating the resin. If it is, it can be used without particular limitation. Since the gas is in a gas state at normal temperature and normal pressure, it can be easily removed from the resin after use. In addition, it is desirable to use a gas which is safe for the environment and worker's health and which can be easily collected without a danger of fire or explosion. Such gases include
For example, inorganic gases such as carbon dioxide, nitrogen, argon, neon, helium, and oxygen, and organic gases such as chlorofluorocarbon and low molecular weight hydrocarbons can be mentioned, but those most impregnated in the resin used are preferably selected.

【００１３】また、ガスは含浸速度が速い超臨界状態で
あることが望ましい。超臨界状態とは、臨界温度以上
で、臨界圧力以上の状態をいう。例えば、ガスが二酸化
炭素ガスの場合には、臨界温度は３０. ９℃、臨界圧力
は７. ４MPa 、窒素ガスの場合には、臨界温度は−１４
６. ９℃、臨界圧力は３. ４MPa である。熱可塑性樹脂
へのガスの含浸量としては、樹脂の溶融粘度を必要量減
少できる量であれば良く、樹脂の種類、ガスの種類によ
って適宜選択することができるが、熱可塑性樹脂１００
重量部に対して、３〜５０重量部のガスを含浸させるこ
とが望ましい。It is desirable that the gas is in a supercritical state where the impregnation rate is high. The supercritical state refers to a state at a critical temperature or higher and a critical pressure or higher. For example, when the gas is carbon dioxide gas, the critical temperature is 30.9 ° C., the critical pressure is 7.4 MPa, and when the gas is nitrogen gas, the critical temperature is −14.
6.9 ° C, critical pressure is 3.4MPa. The amount of gas impregnated into the thermoplastic resin may be any amount that can reduce the required melt viscosity of the resin, and can be appropriately selected depending on the type of the resin and the type of the gas.
It is desirable to impregnate 3 to 50 parts by weight of gas with respect to parts by weight.

【００１４】本発明において、熱可塑性樹脂組成物中に
は、熱可塑性樹脂の他に、充填材、滑剤、安定剤、アン
チブロッキング剤、消泡剤、顔料、染料等の添加剤を本
発明の目的を損なわない程度で配合しても構わない。ま
た、可塑剤や溶剤を同様に配合しても構わないが、環境
・安全面より使用しないことが望ましい。上記のいずれ
の場合においても、熱可塑性樹脂組成物の粒径は６００
ミクロン以下の粉末状が好ましく、３００ミクロン以下
がさらに好ましい。粒径が小さければ小さいほど高圧ガ
スの含浸速度は速くなる。粒径が２〜３ミリのペレット
の場合は、上述のように、高圧ガスの含浸速度が著しく
低下するので効果が小さい。In the present invention, additives such as a filler, a lubricant, a stabilizer, an antiblocking agent, an antifoaming agent, a pigment, a dye, and the like are contained in the thermoplastic resin composition in addition to the thermoplastic resin. It may be blended to the extent that the purpose is not impaired. Further, a plasticizer and a solvent may be similarly blended, but it is desirable not to use it from the viewpoint of environment and safety. In any of the above cases, the particle size of the thermoplastic resin composition is 600
A powder of submicron or less is preferable, and a powder of 300 micron or less is more preferable. The smaller the particle size, the faster the impregnation rate of the high pressure gas. In the case of pellets having a particle size of 2 to 3 mm, the effect is small because the impregnation rate of the high-pressure gas is significantly reduced as described above.

【００１５】本発明において、熱可塑性樹脂組成物中の
熱可塑性樹脂としては、特に限定されず、例えば、ポリ
エチレン、ポリプロピレン、エチレン- 酢酸ビニル共重
合体等のポリオレフィン、ポリ塩化ビニル、ポリ塩化ビ
ニリデン、アクリロニトリル- スチレン- ブタジエン共
重合体、アクリロニトリル- スチレン共重合体、ポリス
チレン、メタクリル樹脂、ポリアミド、ポリカーボネー
ト、ポリアセタール、ポリエステル、アクリル樹脂、熱
可塑性エラストマー、粉末ゴム等が挙げられる。これら
は単独で用いても良いし、組み合わせて用いても良い。
また、本発明の目的を損なわない範囲で、変性や架橋さ
れた樹脂を用いても良い。In the present invention, the thermoplastic resin in the thermoplastic resin composition is not particularly restricted but includes, for example, polyolefins such as polyethylene, polypropylene and ethylene-vinyl acetate copolymer, polyvinyl chloride, polyvinylidene chloride, and the like. Examples include acrylonitrile-styrene-butadiene copolymer, acrylonitrile-styrene copolymer, polystyrene, methacrylic resin, polyamide, polycarbonate, polyacetal, polyester, acrylic resin, thermoplastic elastomer, and powder rubber. These may be used alone or in combination.
Further, a modified or crosslinked resin may be used as long as the object of the present invention is not impaired.

【００１６】さらに、溶融粘度が高くて溶融押出が困難
な樹脂や、熱分解しやすい樹脂等のいわゆる難成形樹脂
を用いても良い。溶融粘度が高くて溶融押出が困難な樹
脂としては、超高分子量ポリエチレン、超高重合度ポリ
塩化ビニル、ポリテトラフルオロエチレン、ポリイミド
等の樹脂が挙げられる。また、熱分解しやすい樹脂とし
ては、ポリ乳酸、ポリヒドロキシブチレート等の生分解
性樹脂、高塩素化度ポリ塩化ビニル、ポリアクリロニト
リル等が挙げられる。Furthermore, a so-called difficult-to-mold resin such as a resin having a high melt viscosity and difficult to be melt-extruded, or a resin easily decomposed by heat may be used. Examples of the resin which has a high melt viscosity and is difficult to be melt-extruded include resins such as ultrahigh molecular weight polyethylene, ultrahigh polymerization degree polyvinyl chloride, polytetrafluoroethylene, and polyimide. Examples of resins that are easily decomposed thermally include biodegradable resins such as polylactic acid and polyhydroxybutyrate, polyvinyl chloride having a high degree of chlorination, and polyacrylonitrile.

【００１７】本発明において、熱可塑性樹脂組成物中の
充填材としては、特に限定されないが、例えば、シリ
カ、マイカ、タルク、石粉、珪藻土、クレー、グラファ
イト、カーボンブラック、炭酸カルシウム、酸化チタ
ン、アルミナ、アルミニウム粉末、鉄粉、二硫化モリブ
デン、硫酸バリウム、リチウム石けん、木粉、ガラス、
パルプ等が挙げられる。これらは単独で用いても良い
し、組み合わせて用いても良い。充填材の添加量として
は、熱可塑性樹脂１００重量部に対して、５０〜１００
０重量部が好ましい。５０重量部未満では、このような
少量の添加では通常の押出成形が可能である場合が多い
ため、本発明の適用の必要性が低く、１０００重量部を
超えると、組成物の粘度が著しく増大するか、或いは得
られる製品が非常に脆くなり形状を保てなくなるおそれ
がある。In the present invention, the filler in the thermoplastic resin composition is not particularly limited. For example, silica, mica, talc, stone powder, diatomaceous earth, clay, graphite, carbon black, calcium carbonate, titanium oxide, alumina , Aluminum powder, iron powder, molybdenum disulfide, barium sulfate, lithium soap, wood powder, glass,
Pulp and the like. These may be used alone or in combination. The amount of the filler added is 50 to 100 parts by weight per 100 parts by weight of the thermoplastic resin.
0 parts by weight is preferred. If the amount is less than 50 parts by weight, ordinary extrusion molding can be performed with such a small amount in many cases. Therefore, the necessity of applying the present invention is low. If the amount exceeds 1000 parts by weight, the viscosity of the composition is significantly increased. Or the resulting product may be too brittle to maintain its shape.

【００１８】本発明における原料供給装置は、例えば、
粉粒状熱可塑性樹脂組成物をストックするホッパ−と、
この熱可塑性樹脂組成物を成形機の供給区域に強制的に
供給する送り機構とから成る。その送り機構は、原料供
給装置内の樹脂を重力による自然落下のみによらず、強
制的に送り込むことが可能な機構であれば特に限定され
ず、例えば、ホッパ−から成形機のシリンダ−内のスク
リュー近傍まで配設された、回転可能な第２のスクリュ
ーからなるものが好ましい。成形機が射出成形機である
場合は、間欠的に原料を成形機に供給するため、ホッパ
−と成形機の接続部の内部に、往復運動により樹脂を押
し込むピストンが設置されたものが好ましい。The raw material supply device in the present invention is, for example,
A hopper for stocking the powdery thermoplastic resin composition,
A feed mechanism for forcibly supplying the thermoplastic resin composition to a supply area of the molding machine. The feed mechanism is not particularly limited as long as it is a mechanism capable of forcibly feeding the resin in the raw material supply device, not only by gravity dropping by gravity, but, for example, from the hopper to the inside of the cylinder of the molding machine. It is preferable to use a rotatable second screw disposed close to the screw. When the molding machine is an injection molding machine, it is preferable that a piston for pushing the resin in a reciprocating motion is installed inside a connection portion between the hopper and the molding machine in order to intermittently supply the raw material to the molding machine.

【００１９】上記第２のスクリューは、回転運動により
原料を強制的に送るものであるので、樹脂原料の過大な
剪断発熱を防ぐため、スクリューのピッチおよび溝深さ
が軸方向に一定であることが好ましい。第２のスクリュ
ーの形状が決まり、樹脂組成物の嵩比重が決まれば、ス
クリューの回転数を制御することにより成形機への輸送
量が制御できる。同様に、成形機のスクリューの供給区
域の形状が決まり、樹脂組成物の嵩比重が決まれば、圧
迫区域への輸送量が制御できる。Since the second screw forcibly feeds the raw material by rotating motion, the pitch and groove depth of the screw must be constant in the axial direction in order to prevent excessive shear heat generation of the resin raw material. Is preferred. When the shape of the second screw is determined and the bulk specific gravity of the resin composition is determined, the amount of transportation to the molding machine can be controlled by controlling the number of rotations of the screw. Similarly, if the shape of the screw supply area of the molding machine is determined and the bulk specific gravity of the resin composition is determined, the amount of transportation to the compression area can be controlled.

【００２０】従って、固体輸送量Ｑ2 より固体輸送量Ｑ
1 を大きくすれば、原料供給装置と成形機の供給区域と
の間で熱可塑性樹脂組成物が高密度化される。これによ
り、原料供給装置と成形機の供給区域の間に、閉塞区
域、すなわち、成形機の供給区域の下流側に供給される
高圧ガスの通過に対して実質的に不透性の連続的に移動
する障壁を形成することが可能となる。ここで、「成形
機の供給区域の下流側に供給される高圧ガスに対して実
質的に不透性の連続的に移動する障壁を形成する」と
は、固体輸送量Ｑ2 と固体輸送量Ｑ1 の比を制御するこ
とにより、固体状の熱可塑性樹脂組成物を中実体（発泡
していない成形体）の密度、或いは中実体に近い密度ま
で高密度化して、成形機の供給区域の下流側に供給され
る高圧ガスが原料供給装置のホッパ−から漏洩しないよ
うにシールすることをいい、高密化された熱可塑性樹脂
組成物は、ホッパ−の投入口から順次供給される熱可塑
性樹脂塑性物が原料供給装置の送り機構により下流側へ
と移動することで連続的に置き換わる。Therefore, the solid transport amount Q is larger than the solid transport amount Q2.
When 1 is increased, the density of the thermoplastic resin composition is increased between the raw material supply device and the supply area of the molding machine. Thereby, between the raw material supply device and the supply area of the molding machine, there is a continuous area which is substantially impervious to the passage of the high pressure gas supplied downstream of the supply area of the molding machine. It becomes possible to form a moving barrier. Here, "forming a continuously moving barrier which is substantially impermeable to the high-pressure gas supplied to the downstream side of the supply area of the molding machine" means that the solid transport amount Q2 and the solid transport amount Q1 , The density of the solid thermoplastic resin composition is increased to the density of a solid body (a non-foamed molded body) or to a density close to the solid body, and the downstream side of the supply area of the molding machine is controlled. Means to prevent the high-pressure gas supplied to the raw material supply device from leaking from the hopper, and the highly densified thermoplastic resin composition is a thermoplastic resin plastic material sequentially supplied from the inlet of the hopper. Are continuously replaced by moving to the downstream side by the feed mechanism of the raw material supply device.

【００２１】本発明において、固体輸送量Ｑ2 と固体輸
送量Ｑ1 の比、（Ｑ1 ／Ｑ2 ）は２. ０〜６. ０の範囲
であることが好ましい。２. ０未満では、熱可塑性樹脂
組成物を安定的に高密度化してガスに対してシールする
ことが困難となり、６. ０を超えると過剰に高密度化さ
れ、原料供給装置や成形機に大きな負荷がかかり、場合
によっては剪断発熱により、熱可塑性樹脂組成物が一部
溶融してしまう。In the present invention, the ratio (Q1 / Q2) of the solid transport amount Q2 to the solid transport amount Q1 is preferably in the range of 2.0 to 6.0. If it is less than 2.0, it is difficult to stably increase the density of the thermoplastic resin composition and seal it against gas. A large load is applied, and in some cases, due to shear heat, the thermoplastic resin composition partially melts.

【００２２】高圧ガス供給装置は、上記の閉塞区域と圧
迫区域の間で、供給区域の下流側にガス注入手段が設け
られおり、ガス注入部では成形機のスクリューの１フラ
イトあたりの容積がその上流部より増大している必要が
ある。これは、閉塞区域で高密度化した熱可塑性樹脂組
成物を容積増大部で開放し、高圧ガスの供給を行いやす
くするためである。このときの容積比は、１. ２〜２.
０が好ましく、１. ４〜１. ８がさらに好ましい。容積
比が１. ２未満では高密度化された熱可塑性樹脂組成物
が十分に開放されないため、高圧ガスの供給が難しく、
２. ０を超えるとガス注入部の下流側に安定した熱可塑
性樹脂組成物の輸送が行えないためである。容積比を変
更する方法としては、特に限定されるものではなく、例
えば、成形機のスクリューのフライトのピッチを変更す
る方法等がある。In the high-pressure gas supply device, gas injection means is provided between the closed area and the compression area on the downstream side of the supply area. In the gas injection section, the volume per flight of the screw of the molding machine is reduced. It is necessary to increase from the upstream part. This is for opening the thermoplastic resin composition densified in the closed area at the volume increasing portion to facilitate supply of the high-pressure gas. The volume ratio at this time is 1.2 to 2.
0 is preferable, and 1.4 to 1.8 is more preferable. If the volume ratio is less than 1.2, the high-density thermoplastic resin composition is not sufficiently opened, so that supply of high-pressure gas is difficult,
If it exceeds 2.0, the thermoplastic resin composition cannot be stably transported downstream of the gas injection section. The method of changing the volume ratio is not particularly limited, and includes, for example, a method of changing the flight pitch of the screw of the molding machine.

【００２３】高圧ガスの供給は、ガスをガスボンベから
成形機へ直接供給してもよいし、加圧ポンプ等を用いて
高圧にして供給してもよい。また、成形機に接続された
供給ノズルの先端に１〜１００ミクロンの焼結体を用い
るとさらに好ましい。The high-pressure gas may be supplied from the gas cylinder directly to the molding machine, or may be supplied at a high pressure using a pressure pump or the like. It is more preferable to use a sintered body of 1 to 100 microns at the tip of the supply nozzle connected to the molding machine.

【００２４】本発明においては、上記「圧迫区域」の上
流ではスクリューの回転により粉粒状熱可塑性樹脂組成
物と高圧ガスとが混合され、高圧ガスの含浸が促進され
る。また、圧迫区域の下流では、高圧ガスが含浸された
粉粒状熱可塑性樹脂組成物が剪断発熱により溶融を始め
る。In the present invention, the powdery and granular thermoplastic resin composition and the high-pressure gas are mixed by the rotation of the screw upstream of the above-mentioned "compression zone", and the impregnation of the high-pressure gas is promoted. Further, downstream of the compression area, the granular thermoplastic resin composition impregnated with the high-pressure gas starts to melt due to heat generated by shearing.

【００２５】また、成形機の供給区域の下流側に供給さ
れる高圧ガスが成形機のスクリュー軸受部から漏洩しな
いような構造、すなわち、通常は耐圧シール構造が必要
となる。その耐圧シール構造は、高圧ガスのシールが可
能な構造であれば特に限定されず、例えば、ガス加圧時
に金属やゴムの変形により、接地面積を増大させてガス
のシールを行う方法等がある。Further, a structure that does not allow the high-pressure gas supplied to the downstream side of the supply area of the molding machine to leak from the screw bearing portion of the molding machine, that is, a pressure-resistant seal structure is usually required. The pressure-resistant seal structure is not particularly limited as long as it is a structure capable of sealing a high-pressure gas. For example, there is a method of sealing the gas by increasing the ground contact area due to deformation of metal or rubber at the time of pressurizing the gas. .

【００２６】しかし、上記方法は、摩耗等によりシール
部材の耐久性に限度があるので、成形機が押出機の場合
には、押出機下流側の樹脂吐出側にスクリュー軸受部を
有する構造のものが好ましい。この方法によれば、樹脂
吐出側にスクリュー軸受部を有することにより、押出機
先端の樹脂背圧で高圧ガスのシールを行うことになるた
め、スクリュー軸受部が高圧ガスにさらされることがな
く、耐圧シール構造が不要となる。However, in the above method, the durability of the seal member is limited due to abrasion or the like. Therefore, when the molding machine is an extruder, the molding method has a screw bearing portion on the resin discharge side downstream of the extruder. Is preferred. According to this method, by having the screw bearing portion on the resin discharge side, the high pressure gas is sealed by the resin back pressure at the extruder tip, so that the screw bearing portion is not exposed to the high pressure gas, The need for a pressure-resistant seal structure is eliminated.

【００２７】（作用）請求項１記載の熱可塑性樹脂成形
体の製造装置は、原料供給装置と成形機の供給区域との
間に、閉塞区域があり、高圧ガス注入手段が供給区域の
下流側の容積増大部に設けられているので、粉粒状熱可
塑性樹脂組成物を従来の如く剪断発熱等により溶融させ
ることなく、確実に固体状態の樹脂に高圧ガスを溶解さ
せることが出来るため、成形機の限られた滞留時間内で
樹脂中へ高圧ガスを完全に溶解させることが出来る。従
って、溶融粘度が高くて溶融押出が困難な樹脂や、熱分
解しやすい樹脂等のいわゆる難成形樹脂の成形に適用す
ることにより、易流動化、低温成形化が可能であり、
又、熱可塑性樹脂発泡体の製造に適用することも可能で
ある。(Function) In the apparatus for manufacturing a thermoplastic resin article according to the first aspect, a closed area is provided between the raw material supply apparatus and the supply area of the molding machine, and the high-pressure gas injection means is provided downstream of the supply area. Since the high-pressure gas is provided in the volume increasing portion of the molding machine, the high-pressure gas can be reliably dissolved in the solid-state resin without melting the granular thermoplastic resin composition due to shearing heat generation as in the related art. The high-pressure gas can be completely dissolved in the resin within the limited residence time. Therefore, by applying to the molding of so-called difficult-to-mold resin such as a resin having a high melt viscosity and difficult to melt-extrude, and a resin which is easily decomposed by heat, it is possible to easily flow and to mold at a low temperature.
Further, the present invention can be applied to the production of a thermoplastic resin foam.

【００２８】請求項２記載の熱可塑性樹脂成形体の製造
装置は、押出機下流側の樹脂吐出側にスクリュー軸受部
を有しているので、スクリュー軸受部が高圧ガスにさら
されることがないので、耐圧シール構造が不要となり、
上記作用に加えて、装置の簡素化を果たすことが可能と
なる。請求項３記載の熱可塑性樹脂成形体の製造装置
は、請求項１又は２記載の製造装置において、原料供給
装置に、粉粒状熱可塑性樹脂組成物を成形機の供給区域
に強制的に供給する送り機構が設けられ、高圧ガスの不
透性が、固体輸送量Ｑ2と固体輸送量Ｑ1 の比によって
制御されるようになされているので、原料供給装置と成
形機の供給区域との間に閉塞区域を確実に形成し、上記
作用を一層確実なものとする。Since the apparatus for manufacturing a thermoplastic resin article according to the second aspect has a screw bearing on the resin discharge side downstream of the extruder, the screw bearing is not exposed to high-pressure gas. , No pressure seal structure is required,
In addition to the above operation, the device can be simplified. According to a third aspect of the present invention, in the manufacturing apparatus of the first or second aspect, the powdery thermoplastic resin composition is forcibly supplied to a raw material supply device to a supply area of a molding machine. A feed mechanism is provided so that the impermeability of the high-pressure gas is controlled by the ratio of the solid transport amount Q2 to the solid transport amount Q1, so that the blockage between the raw material supply device and the supply area of the molding machine is obstructed. The area is reliably formed, and the above operation is further ensured.

【００２９】請求項４記載の熱可塑性樹脂成形体の製造
方法は、請求項１〜３いずれか１項記載の製造装置を用
い、粉粒状熱可塑性樹脂組成物を上記原料供給装置より
上記成形機の供給区域に搬送する際、該樹脂組成物を該
原料供給装置内の送り機構により高密度化することによ
って、前記成形機の供給区域の下流側に供給される高圧
ガスの通過に対して実質的に不透性の連続的に移動する
障壁を形成し、該障壁の下流側の容積増大部において、
前記固体状の粉粒状樹脂組成物中に高圧ガスを供給し、
該樹脂組成物と高圧ガスを混合した後、溶融し、次いで
前記成形機の下流側に接続された賦形装置にて、得られ
た溶融混合物を賦形することにより、粉粒状熱可塑性樹
脂組成物を従来の如く剪断発熱等により溶融させること
なく、確実に固体状態の樹脂に高圧ガスを溶解させるこ
とが出来るため、成形機の限られた滞留時間内で樹脂中
へ高圧ガスを完全に溶解させることが出来、従って、溶
融粘度が高くて溶融押出が困難な樹脂や、熱分解しやす
い樹脂等のいわゆる難成形樹脂の成形において、易流動
化、低温成形化が可能であり、又、熱可塑性樹脂発泡体
の製造に適用することも可能である。According to a fourth aspect of the present invention, there is provided a method for producing a thermoplastic resin molded article, comprising using the production apparatus according to any one of the first to third aspects to convert the granular thermoplastic resin composition from the raw material supply apparatus to the molding machine. When the resin composition is transported to the supply area, the resin composition is densified by a feed mechanism in the raw material supply apparatus, so that the high pressure gas supplied downstream of the supply area of the molding machine is substantially prevented from passing therethrough. Forming a continuously impermeable, continuously impermeable barrier, and at a volume increase downstream of the barrier,
Supplying a high-pressure gas into the solid powdery resin composition,
The resin composition and the high-pressure gas are mixed and then melted, and then, by using a shaping device connected to the downstream side of the molding machine, the obtained molten mixture is shaped to obtain a powdery thermoplastic resin composition. The high-pressure gas can be reliably dissolved in the solid-state resin without melting the product due to the heat generated by shearing as in the past, so that the high-pressure gas is completely dissolved in the resin within the limited residence time of the molding machine. Therefore, in molding so-called difficult-to-mold resin such as a resin having a high melt viscosity, which is difficult to melt-extrude, and a resin which is easily thermally decomposed, it is possible to easily flow and mold at a low temperature. It is also possible to apply to production of a plastic resin foam.

【００３０】請求項５記載の熱可塑性樹脂成形体の製造
方法は、粉粒状熱可塑性樹脂組成物を上記原料供給装置
より上記成形機の供給区域に搬送する固体輸送量Ｑ1
と、前記成形機の供給区域の固体輸送量Ｑ2 との比、
（Ｑ1 ／Ｑ2 ）を２. ０〜６. ０の範囲とするものであ
るので、原料供給装置と成形機の供給区域の間に、簡便
・確実に閉塞区域を形成することが可能となる。According to a fifth aspect of the present invention, there is provided a method for producing a thermoplastic resin molded article, wherein the solid transported amount Q1 for transporting the granular thermoplastic resin composition from the raw material supply device to the supply area of the molding machine.
And the ratio of the solids transport volume Q2 in the supply area of the molding machine,
Since (Q1 / Q2) is in the range of 2.0 to 6.0, a closed area can be simply and reliably formed between the raw material supply device and the supply area of the molding machine.

【００３１】[0031]

【発明の実施の形態】以下、本発明の実施の形態を図面
を参照して説明する。図１は、本発明に係る熱可塑性樹
脂成形体の製造装置の一例を示す模式的断面図である。
この例の熱可塑性樹脂成形体の製造装置１は、シリンダ
ー１１１内に単軸スクリュー１１２が配設された押出成
形機１１と、この押出機１１の上流側に接続された粉粒
状熱可塑性樹脂組成物を供給する原料供給装置１２と、
シリンダー１１１の中途に接続された高圧ガス供給装置
１３と、押出機１１の下流側に接続された金型１４とを
備え、又、主にシリンダー１１１とスクリュー１１２と
によって、原料供給装置１２から供給された粉粒状熱可
塑性樹脂組成物を押出機１１の下流へ輸送する供給区域
１Ａ、粉粒状熱可塑性樹脂組成物と高圧ガスとを混合し
て高密化する圧迫区域１Ｂ、及び熱可塑性樹脂組成物と
高圧ガスとの混合物を計量する計量区域１Ｃが形成され
る。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic sectional view showing an example of the apparatus for producing a thermoplastic resin molded article according to the present invention.
The apparatus 1 for manufacturing a thermoplastic resin molded article of this example includes an extruder 11 in which a single screw 112 is disposed in a cylinder 111, and a powdery and granular thermoplastic resin composition connected upstream of the extruder 11. A raw material supply device 12 for supplying a material,
A high-pressure gas supply device 13 connected to the middle of the cylinder 111 and a mold 14 connected downstream of the extruder 11 are provided. The material is supplied from the raw material supply device 12 mainly by the cylinder 111 and the screw 112. Supply section 1A for transporting the powdery and granular thermoplastic resin composition to the downstream of the extruder 11, a compression section 1B for mixing the particulate and thermoplastic resin composition with a high-pressure gas to increase the density, and a thermoplastic resin composition Section 1C for measuring a mixture of gas and high-pressure gas is formed.

【００３２】原料供給装置１２は、熱可塑性樹脂組成物
をストックするホッパー１２１と、粉粒状熱可塑性樹脂
組成物を押出機１１の供給区域１Ａに強制的に供給する
送り機構１２２とからなり、送り機構１２２は、原料供
給装置内の樹脂を重力により自然落下させる手段のみに
よるものとすることもできるが、押出機のシリンダ−内
のスクリュー近傍まで配設された、回転可能な第２のス
クリューからなるものが好ましい。送り機構１２２によ
り、ホッパ−１２１から押出機１１における供給区域１
Ａに搬送される固体輸送量Ｑ1 と、前記供給区域１Ａの
固体輸送量Ｑ2 との比、（Ｑ1 ／Ｑ2 ）が２. ０〜６.
０の範囲を満たすことにより、原料供給装置１２と押出
機１１の供給区域１Ａとの間に閉塞区域１Ｄ、すなわ
ち、押出機１１の供給区域の下流側に供給される高圧ガ
スに対して実質的に不透性の、上述の連続的に移動する
障壁が形成される。The raw material supply device 12 comprises a hopper 121 for stocking the thermoplastic resin composition, and a feed mechanism 122 for forcibly supplying the powdery thermoplastic resin composition to the supply section 1A of the extruder 11. The mechanism 122 may be based solely on the means for allowing the resin in the raw material supply device to naturally fall by gravity. However, the mechanism 122 may be provided from a rotatable second screw disposed near the screw in the cylinder of the extruder. Are preferred. By the feed mechanism 122, the supply area 1 in the extruder 11 from the hopper 121
A, the ratio (Q1 / Q2) of the solid transported amount Q1 conveyed to A to the solid transported amount Q2 in the supply area 1A is 2.0 to 6.0.
By satisfying the range of 0, the closed section 1D between the raw material supply device 12 and the supply section 1A of the extruder 11, that is, the high-pressure gas supplied to the downstream side of the supply section of the extruder 11 is substantially reduced. The above described continuously moving barrier is formed.

【００３３】スクリュー１１２は、押出機１１の供給区
域１Ａの下流側で一部フライトピッチが広がっており、
高圧ガス供給装置１３は、押出機１１の供給区域の下流
側でスクリュー１１２のフライトピッチが広がっている
部分に、高圧ガス注入ノズル１３１を備えている。スク
リュー１１２の軸受け部１５には、押出機１１の供給区
域１Ａの下流側に供給される高圧ガスが漏洩しないよう
耐圧シール構造が設けられている。The screw 112 has a flight pitch partially widened downstream of the feed section 1A of the extruder 11,
The high-pressure gas supply device 13 includes a high-pressure gas injection nozzle 131 at a portion where the flight pitch of the screw 112 is widened on the downstream side of the supply area of the extruder 11. The bearing portion 15 of the screw 112 is provided with a pressure-resistant seal structure so that the high-pressure gas supplied downstream of the supply section 1A of the extruder 11 does not leak.

【００３４】図２は、本発明の熱可塑性樹脂成形体の製
造装置の他の例を示す模式的断面図である。この例の熱
可塑性樹脂成形体の製造装置２は、シリンダー２１１内
に単軸スクリュー２１２が配設された押出成形機２１を
備えており、スクリュー２１２の軸受け部２５が押出機
２１の下流側の樹脂吐出側にあり、耐圧シール構造が設
けられていない点を除いては、図１に示した製造装置１
と同様である。尚、図２中、２Ａは供給区域、２Ｂは圧
迫区域、２Ｃは計量区域、２Ｄは閉塞区域であり、その
他、図１と同様の部分には図１と同様の符号を付与して
表示した。FIG. 2 is a schematic sectional view showing another example of the apparatus for producing a thermoplastic resin molded article of the present invention. The apparatus 2 for manufacturing a thermoplastic resin molded article of this example includes an extruder 21 in which a single screw 212 is provided in a cylinder 211, and a bearing 25 of the screw 212 is located downstream of the extruder 21. Except for being on the resin discharge side and not having a pressure-resistant seal structure, the manufacturing apparatus 1 shown in FIG.
Is the same as In FIG. 2, 2A is a supply area, 2B is a compression area, 2C is a weighing area, 2D is a closed area, and other parts similar to those in FIG. .

【００３５】[0035]

【実施例】（実施例１）図１を参照して説明した製造装
置１を用いて熱可塑性樹脂成形体の製造を行った。押出
機１１として、φ４０単軸型であって、Ｌ／Ｄ= ２６、
５ＫＷ、スクリュー１１２の諸元が表１に示す通りのも
のを用い、賦形装置１４として、オイル温調により温度
制御可能なφ１０ｍｍのロッドダイを用いた。成形機の
スクリュー軸受部の耐圧シール構造としては、グリーン
ツイード＆カンパニー・ジャパン社製のＭＳＥシールを
採用した。(Example 1) A thermoplastic resin molded body was manufactured using the manufacturing apparatus 1 described with reference to FIG. The extruder 11 is a φ40 single-screw type, with L / D = 26,
A screw die having 5 KW and the specifications of the screw 112 as shown in Table 1 was used, and a rod die having a diameter of 10 mm and capable of controlling the temperature by controlling the oil temperature was used as the shaping device 14. As the pressure-resistant seal structure of the screw bearing portion of the molding machine, an MSE seal manufactured by Green Tweed & Company Japan was used.

【００３６】原料として、粉末状の超高分子量ポリエチ
レン（三井化学社製、商品名「ハイゼックスミリオン２
４０Ｍ」、嵩比重：０. ４２、真比重：０. ９３５、融
点：１３６℃）を用い、これをホッパー１２１に供給し
た。前記樹脂を、外径３０ｍｍ、溝部径２５ｍｍ、フラ
イトピッチ１８ｍｍのスクリューを備えた送り機構１２
２により押出機１１の供給区域１Ａに搬送した。As a raw material, a powdery ultra-high molecular weight polyethylene (trade name “HIZEX MILLION 2” manufactured by Mitsui Chemicals, Inc.)
40M ", bulk specific gravity: 0.42, true specific gravity: 0.935, melting point: 136 ° C), and this was supplied to the hopper 121. A feed mechanism 12 equipped with a screw having an outer diameter of 30 mm, a groove diameter of 25 mm, and a flight pitch of 18 mm.
By 2, it was conveyed to the supply area 1 </ b> A of the extruder 11.

【００３７】送り機構１２２により、ホッパ１２１から
押出機１１の供給区域１Ａに搬送される固体輸送量Ｑ1
と、供給区域１Ａの固体輸送量Ｑ2 の比、（Ｑ1 ／Ｑ2
）が３. ０になるように押出機１１のスクリュー回転
数を調整した。高圧ガスとしては、二酸化炭素ガスを用
い、高圧ガス供給装置１３によりガス注入ノズル１３１
から、押出機１１の供給区域１Ａの下流側に、含浸圧力
１５ＭＰａ、平均含浸量１５重量部（押出量とポンプに
よるガス供給量より算出した、前記超高分子量ポリエチ
レン１００重量部に対する割合）となるように供給し
た。シリンダーの設定温度は、供給区域１Ａを１２０
℃、圧迫区域１Ｂを２２０℃、計量区域１Ｃを１８０℃
とし、押出量５ｋｇ／時間で十分に溶融混練した。引き
続いて、８０℃に設定された金型１４にて、急冷・固化
させ、ロッド状の中実成形体を押出成形によって得た。The solid transport amount Q 1 transported from the hopper 121 to the supply area 1 A of the extruder 11 by the feed mechanism 122.
And the ratio of the solid transportation amount Q2 in the supply area 1A, (Q1 / Q2
) Was 3.0, the screw rotation speed of the extruder 11 was adjusted. As the high-pressure gas, carbon dioxide gas is used, and the high-pressure gas supply device 13 uses a gas injection nozzle 131.
Thus, on the downstream side of the supply section 1A of the extruder 11, the impregnation pressure is 15 MPa and the average impregnation amount is 15 parts by weight (the ratio based on the extrusion amount and the gas supply amount by the pump, based on 100 parts by weight of the ultrahigh molecular weight polyethylene). As supplied. The set temperature of the cylinder is set to 120
℃, compression area 1B 220 ℃, weighing area 1C 180 ℃
The mixture was sufficiently melt-kneaded at an extrusion rate of 5 kg / hour. Subsequently, the mixture was rapidly cooled and solidified in a mold 14 set at 80 ° C. to obtain a rod-shaped solid molded body by extrusion molding.

【００３８】[0038]

【表１】 [Table 1]

【００３９】（実施例２）図２を参照して説明した製造
装置２を用いて熱可塑性樹脂発泡成形体の製造を行っ
た。押出機２１として、φ４０単軸型であって、Ｌ／Ｄ
= ２６、５ＫＷ、スクリュー２１２の諸元が表１に示す
通りのものを用い、賦形装置１４として、オイル温調に
より温度制御可能なφ１０ｍｍのロッドダイを用いた。(Example 2) A foamed thermoplastic resin article was manufactured using the manufacturing apparatus 2 described with reference to FIG. The extruder 21 is a φ40 single-screw type and has an L / D
= 26, 5 KW, the specifications of the screw 212 as shown in Table 1 were used, and as the shaping device 14, a φ10 mm rod die whose temperature could be controlled by oil temperature control was used.

【００４０】原料として、粉砕したエチレン−酢酸ビニ
ル共重合体（日本ポリケム社製、商品名「ノバテックＥ
ＶＡ ＬＶ６６０」）１００重量部、木粉（三和セルロ
シン社製、♯１００通過品、平均粒径２８μｍ）２００
重量部（混合物嵩比重：０．２ｇ／ｃｍ3 、混合物真比
重：１．１ｇ／ｃｍ3 、融点６８℃）を用い、これをホ
ッパー１２１に供給した。前記樹脂を、外径３０ｍｍ、
溝部径２５ｍｍ、フライトピッチ１８ｍｍのスクリュー
を備えた送り機構１２２により押出機２１の供給区域２
Ａに搬送した。As a raw material, a pulverized ethylene-vinyl acetate copolymer (trade name "Novatech E" manufactured by Nippon Polychem Co., Ltd.)
VA LV660 ") 100 parts by weight, wood flour (manufactured by Sanwa Cellulosin, # 100 passed, average particle size 28 m) 200
The mixture was supplied to the hopper 121 using parts by weight (bulk specific gravity of the mixture: 0.2 g / cm 3 , true specific gravity of the mixture: 1.1 g / cm 3 , melting point: 68 ° C.). The resin has an outer diameter of 30 mm,
The feed area 2 of the extruder 21 is fed by a feed mechanism 122 equipped with a screw having a groove diameter of 25 mm and a flight pitch of 18 mm.
A.

【００４１】送り機構１２２により、ホッパ１２１から
押出機２１の供給区域２Ａに搬送される固体輸送量Ｑ1
と、供給区域２Ａの固体輸送量Ｑ2 の比、（Ｑ1 ／Ｑ2
）が６. ０になるように押出機２１のスクリュー回転
数を調整した。高圧ガスとしては、二酸化炭素ガスを用
い、高圧ガス供給装置１３によりガス注入ノズル１３１
から、押出機２１の供給区域２Ａの下流側に、含浸圧力
２０ＭＰａ、平均含浸量２０重量部（押出量とポンプに
よるガス供給量より算出した、前記混合物１００重量部
に対する割合）となるように供給した。シリンダーの設
定温度は、供給区域２Ａを６０℃、圧迫区域２Ｂを１２
０℃、計量区域２Ｃを１４０℃とし、押出量５ｋｇ／時
間で十分に溶融混練した。引き続いて、７０℃に設定さ
れた金型（賦形装置）から一気に脱圧し、ロッド状の発
泡倍率３倍の発泡体を押出成形によって得た。The transport mechanism 122 transports the solids Q 1 transported from the hopper 121 to the supply area 2 A of the extruder 21.
And the ratio of the solid transportation amount Q2 in the supply area 2A, (Q1 / Q2
) Was 6.0, the screw rotation speed of the extruder 21 was adjusted. As the high-pressure gas, carbon dioxide gas is used, and the high-pressure gas supply device 13 uses a gas injection nozzle 131.
From the feed section 2A of the extruder 21 so as to have an impregnation pressure of 20 MPa and an average impregnation amount of 20 parts by weight (calculated from the amount of extrusion and the amount of gas supplied by the pump, relative to 100 parts by weight of the mixture). did. The set temperature of the cylinder is 60 ° C in the supply area 2A and 12 in the compression area 2B.
At 0 ° C., the measuring area 2C was 140 ° C., and the mixture was sufficiently melt-kneaded at an extrusion rate of 5 kg / hour. Subsequently, the pressure was rapidly released from a mold (shaping device) set at 70 ° C., and a rod-shaped foam having an expansion ratio of 3 times was obtained by extrusion molding.

【００４２】（比較例）図３に示す熱可塑性樹脂成形体
の製造装置３は、シリンダー３１１内に２段ステージの
スクリュー３１２が配設された押出機３１を備えてお
り、ガス注入ノズル３３１がスクリュー３１２の２段目
の上流の位置に配設されている。実施例１と同様の原料
及びこの製造装置３を用いて、高圧ガスをスクリュー３
１２の２段目の上流から供給した以外は、実施例１と同
様に押出成形を行ったところ、１段目の計量区域におい
て剪断発熱により、樹脂が溶融してしまい、その結果、
粘度が非常に高くなり、トルクオーバーで押出成形を続
けることが出来なかった。(Comparative Example) The apparatus 3 for manufacturing a thermoplastic resin article shown in FIG. 3 includes an extruder 31 in which a two-stage screw 312 is provided in a cylinder 311, and a gas injection nozzle 331 is provided. The screw 312 is disposed at a position upstream of the second stage. Using the same raw material as in Example 1 and this manufacturing apparatus 3, a high-pressure gas was
Extrusion molding was performed in the same manner as in Example 1 except that the resin was supplied from the upstream of the second stage of No. 12, and the resin was melted due to heat generated by shearing in the measurement area of the first stage.
The viscosity became very high, and the extrusion molding could not be continued due to excessive torque.

【００４３】[0043]

【発明の効果】本発明の熱可塑性樹脂成形体の製造装置
および製造方法は、上記の構成とされているので、従来
の如く粉粒状熱可塑性樹脂組成物を剪断発熱等により溶
融させることなく、確実に固体状態の樹脂に高圧ガスを
溶解させることが出来るため、成形機の限られた滞留時
間内で樹脂中へ高圧ガスを完全に溶解させることが出
来、従って、溶融粘度が高くて溶融押出が困難な樹脂
や、熱分解しやすい樹脂等のいわゆる難成形樹脂の成形
に適用することにより、易流動化、低温成形化が可能で
あり、又、熱可塑性樹脂発泡体の製造に適用することも
可能である。The apparatus and method for manufacturing a thermoplastic resin molded article of the present invention have the above-described structure, so that the powdery thermoplastic resin composition is not melted by shearing heat or the like as in the prior art. Since the high-pressure gas can be reliably dissolved in the solid-state resin, the high-pressure gas can be completely dissolved in the resin within a limited residence time of the molding machine. By applying to molding of so-called difficult-to-mold resin such as resin that is difficult to heat and resin that easily decomposes, it can be easily fluidized and molded at low temperature, and can be applied to the production of thermoplastic resin foam. Is also possible.

【００４４】[0044]

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明の熱可塑性樹脂成形体の製造装置及び製
造方法の一例を説明するための模式的断面図である。FIG. 1 is a schematic cross-sectional view for explaining an example of a manufacturing apparatus and a manufacturing method of a thermoplastic resin molded article of the present invention.

【図２】本発明の熱可塑性樹脂成形体の製造装置及び製
造方法の他の例を説明するための模式的断面図である。FIG. 2 is a schematic cross-sectional view for explaining another example of the apparatus and method for manufacturing a thermoplastic resin molded article of the present invention.

【図３】比較例に用いた熱可塑性樹脂成形体の製造装置
及び製造方法を説明するための模式的断面図である。FIG. 3 is a schematic cross-sectional view for explaining a production apparatus and a production method of a thermoplastic resin molded body used in a comparative example.

【符号の説明】[Explanation of symbols]

１・・本発明に係る熱可塑性樹脂成形体の製造装置の１
例 ２・・本発明に係る熱可塑性樹脂成形体の製造装置の他
の例 １１・・押出成形機（押出機） １２・・原料供給装置 １３・・高圧ガス供給装置 １４・・賦形装置（金型） １５・・軸受け部 ２１・・押出成形機（押出機） １１１・・シリンダー １１２・・スクリュー １２１・・ホッパー １２２・・送り機構 １３１・・ガス注入ノズル ２１１・・シリンダー ２１２・・スクリュー １Ａ・・供給区域 ２Ａ・・供給区域 １Ｂ・・圧迫区域 ２Ｂ・・圧迫区域 １Ｃ・・計量区域 ２Ｃ・・計量区域 １Ｄ・・閉塞区域 ２Ｄ・・閉塞区域1 .. 1 of the apparatus for manufacturing a thermoplastic resin molded article according to the present invention
Example 2 Another example of the apparatus for manufacturing a thermoplastic resin molded article according to the present invention 11. Extrusion molding machine (extruder) 12. Raw material supply apparatus 13. High-pressure gas supply apparatus 14. Shaping apparatus ( Mold 15) Bearing 21 Extruder (extruder) 111 Cylinder 112 Screw 121 Hopper 122 Feed mechanism 131 Gas injection nozzle 211 Cylinder 212 Screw 1A・ ・ Supply area 2A ・ ・ Supply area 1B ・ ・ Compression area 2B ・ ・ Compression area 1C ・ ・ Measurement area 2C ・ ・ Measurement area 1D ・ ・ Occlusion area 2D ・ ・ Occlusion area

フロントページの続き Ｆターム(参考） 4F207 AA04 AC01 AC04 AM03 AR14 KA01 KA12 KF02 KF12 KJ06 KK04 KK12 KK41 Continued on the front page F term (reference) 4F207 AA04 AC01 AC04 AM03 AR14 KA01 KA12 KF02 KF12 KJ06 KK04 KK12 KK41

Claims (5)

【特許請求の範囲】[Claims] 【請求項１】 シリンダー内にスクリューが配設された
成形機と、該成形機の上流側に接続された粉粒状熱可塑
性樹脂組成物を供給する原料供給装置と、前記シリンダ
ーの中途に接続された高圧ガス供給装置と、前記成形機
の下流側に接続された賦形装置とからなる熱可塑性樹脂
成形体の製造装置であって、 前記原料供給装置と前記成形機の供給区域との間に形成
された高圧ガスの通過に対して実質的に不透性である閉
塞区域、 前記粉粒状熱可塑性樹脂組成物を成形機下流へ輸送する
供給区域、 該供給区域の下流側の容積増大部に設けられた粉粒状熱
可塑性樹脂組成物に高圧ガスを注入する高圧ガス供給手
段、 前記粉粒状熱可塑性樹脂組成物と高圧ガスとを混合し高
密化する圧迫区域、及び、前記高密化された樹脂組成物
と高圧ガスとの混合物を計量する計量区域を備えてお
り、 且つ前記成形機のスクリュー軸受部が耐圧シール構造と
なされていることを特徴とする熱可塑性樹脂成形体の製
造装置。1. A molding machine in which a screw is provided in a cylinder, a raw material supply device connected to an upstream side of the molding machine for supplying a powdery thermoplastic resin composition, and a molding machine connected in the middle of the cylinder. A high-pressure gas supply device, and a molding device for a thermoplastic resin body, comprising a shaping device connected to the downstream side of the molding machine, between the raw material supply device and a supply area of the molding machine. A closed area that is substantially impermeable to the passage of the formed high-pressure gas, a supply area for transporting the powdery and granular thermoplastic resin composition downstream of the molding machine, and a volume increasing portion downstream of the supply area. High-pressure gas supply means for injecting a high-pressure gas into the provided granular thermoplastic resin composition, a compression area for mixing the granular thermoplastic resin composition and the high-pressure gas to increase the density, and the densified resin Mixing the composition with a high pressure gas Includes a metering zone for weighing objects, and wherein the molding machine apparatus for producing a thermoplastic resin molded screw bearing portion is characterized in that it is made pressure-resistant seal structure. 【請求項２】 シリンダー内にスクリューが配設された
押出成形機と、該押出成形機の上流側に接続された粉粒
状熱可塑性樹脂組成物を供給する原料供給装置と、前記
シリンダーの中途に接続された高圧ガス供給装置と、前
記押出成形機の下流側に接続された賦形装置とからなる
熱可塑性樹脂成形体の製造装置であって、 前記原料供給装置と前記押出成形機の供給区域との間に
形成された高圧ガスの通過に対して実質的に不透性であ
る閉塞区域、 前記粉粒状熱可塑性樹脂組成物を押出成形機下流へ輸送
する供給区域、 該供給区域の下流側の容積増大部に設けられた粉粒状熱
可塑性樹脂組成物に高圧ガスを注入する高圧ガス供給手
段、 前記粉粒状熱可塑性樹脂組成物と高圧ガスとを混合し高
密化する圧迫区域、 前記高密化された樹脂組成物と高圧ガスとの混合物を計
量する計量区域、及び、前記押出成形機の樹脂吐出側に
スクリュー軸受部を備えていることを特徴とする熱可塑
性樹脂成形体の製造装置。2. An extruder having a screw disposed in a cylinder, a raw material supply device connected to an upstream side of the extruder for supplying a powdery thermoplastic resin composition, and an intermediate part of the cylinder. A high-pressure gas supply device connected thereto, and a manufacturing device of a thermoplastic resin molded body including a shaping device connected downstream of the extruder, wherein a supply area of the raw material supply device and the extruder A closed area substantially impermeable to the passage of the high-pressure gas formed therebetween, a supply area for transporting the particulate thermoplastic resin composition downstream of the extruder, a downstream side of the supply area A high-pressure gas supply means for injecting a high-pressure gas into the powdery and granular thermoplastic resin composition provided in the volume increasing portion of the compression section; a compression area where the powdery and granular thermoplastic resin composition and the high-pressure gas are mixed to increase the density; Resin composition and Weighing area to meter a mixture of pressure gas, and apparatus for producing a thermoplastic resin molded article, characterized by comprising a screw bearing portion on the resin discharge side of the extruder. 【請求項３】 上記原料供給装置に、上記粉粒状熱可塑
性樹脂組成物を上記成形機の供給区域に強制的に供給す
る送り機構が設けられており、上記閉塞区域における高
圧ガスの不透性が前記送り機構による粉粒状熱可塑性樹
脂組成物輸送量と前記成形機の供給区域による粉粒状熱
可塑性樹脂組成物輸送量の比によって制御されるように
なされていることを特徴とする請求項１又は２記載の熱
可塑性樹脂成形体の製造装置。3. A feed mechanism for forcibly supplying the granular thermoplastic resin composition to a supply area of the molding machine is provided in the raw material supply apparatus, and a high pressure gas impermeability in the closed area is provided. Is controlled by a ratio of a transport amount of the particulate thermoplastic resin composition by the feeding mechanism and a transport amount of the particulate thermoplastic resin composition by a supply area of the molding machine. Or the manufacturing apparatus of the thermoplastic resin molded body of 2. 【請求項４】 請求項１〜３いずれか１項記載の熱可塑
性樹脂成形体の製造装置を用いて熱可塑性樹脂成形体を
製造する方法であって、 粉粒状熱可塑性樹脂組成物を上記原料供給装置より上記
成形機の供給区域に搬送する際、該樹脂組成物を該原料
供給装置の送り機構により高密度化することによって、
前記成形機の供給区域の下流側に供給される高圧ガスの
通過に対して実質的に不透性の連続的に移動する障壁を
形成し、該障壁の下流側の容積増大部において、前記粉
粒状熱可塑性樹脂組成物中に高圧ガスを供給し混合した
後、溶融し、次いで前記成形機の下流側に接続された賦
形装置によって、得られた溶融混合物を賦形することを
特徴とする熱可塑性樹脂成形体の製造方法。4. A method for producing a thermoplastic resin molded article using the apparatus for producing a thermoplastic resin molded article according to any one of claims 1 to 3, wherein the powdery thermoplastic resin composition is prepared by mixing the raw material with the raw material. When transported from the supply device to the supply area of the molding machine, by densifying the resin composition by the feed mechanism of the raw material supply device,
Forming a continuously moving barrier that is substantially impermeable to the passage of high pressure gas supplied downstream of the supply area of the molding machine; After supplying and mixing a high-pressure gas into the granular thermoplastic resin composition, the mixture is melted, and then the obtained molten mixture is shaped by a shaping device connected to the downstream side of the molding machine. A method for producing a thermoplastic resin molded article. 【請求項５】 粉粒状熱可塑性樹脂組成物を上記原料供
給装置より上記成形機の供給区域に搬送する輸送量Ｑ1
と、前記成形機の供給区域による粉粒状熱可塑性樹脂組
成物の輸送量Ｑ2 との比、（Ｑ1 ／Ｑ2 ）が２. ０〜
６. ０の範囲を満たすことを特徴とする請求項４記載の
熱可塑性樹脂成形体の製造方法。5. A transport amount Q1 for transporting the granular thermoplastic resin composition from the raw material supply device to a supply area of the molding machine.
And (Q1 / Q2) are 2.0 to 2.0, which is the ratio of the transport amount Q2 of the particulate thermoplastic resin composition to the supply area of the molding machine.
5. The method for producing a thermoplastic resin article according to claim 4, wherein the range of 6.0 is satisfied.
JP2000094748A 2000-03-30 2000-03-30 Apparatus and method for manufacturing thermoplastic resin molding Pending JP2001277328A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Publication Number Publication Date
JP2001277328A true JP2001277328A (en) 2001-10-09

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Cited By (6)

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Publication number Priority date Publication date Assignee Title
JP2005074794A (en) * 2003-08-29 2005-03-24 Mitsui Chemicals Inc Apparatus for molding foamed thermoplastic resin composition molding
CN103317700A (en) * 2012-03-23 2013-09-25 富士施乐株式会社 Method for manufacturing tubular body
CN104552876A (en) * 2014-12-11 2015-04-29 浙江海洋学院 Ultrahigh-pressure extruder
KR20200001043A (en) * 2018-06-26 2020-01-06 고등기술연구원연구조합 Screw Feeder Type High Pressure Continuous Feeding Machine of Particle Fuel
KR20200125304A (en) * 2019-04-26 2020-11-04 고등기술연구원연구조합 Screw Feeder Type High Pressure Continuous Feeding Machine of Particle Fuel Comprising Plug Generator
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005074794A (en) * 2003-08-29 2005-03-24 Mitsui Chemicals Inc Apparatus for molding foamed thermoplastic resin composition molding
CN103317700A (en) * 2012-03-23 2013-09-25 富士施乐株式会社 Method for manufacturing tubular body
CN104552876A (en) * 2014-12-11 2015-04-29 浙江海洋学院 Ultrahigh-pressure extruder
KR20200001043A (en) * 2018-06-26 2020-01-06 고등기술연구원연구조합 Screw Feeder Type High Pressure Continuous Feeding Machine of Particle Fuel
KR102145230B1 (en) * 2018-06-26 2020-08-19 고등기술연구원연구조합 Screw Feeder Type High Pressure Continuous Feeding Machine of Particle Fuel
KR20200125304A (en) * 2019-04-26 2020-11-04 고등기술연구원연구조합 Screw Feeder Type High Pressure Continuous Feeding Machine of Particle Fuel Comprising Plug Generator
KR20200125875A (en) * 2019-04-26 2020-11-05 고등기술연구원연구조합 Rotating Plug Distribution Apparatus for Screw Feeder Type High Pressure Continuous Feeding Machine of Particle Fuel
KR102214425B1 (en) * 2019-04-26 2021-02-09 고등기술연구원연구조합 Screw Feeder Type High Pressure Continuous Feeding Machine of Particle Fuel Comprising Plug Generator
KR102214435B1 (en) * 2019-04-26 2021-02-10 고등기술연구원연구조합 Rotating Plug Distribution Apparatus for Screw Feeder Type High Pressure Continuous Feeding Machine of Particle Fuel

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