WO2019009362A1 - Procédé et appareil de fabrication d'un corps moulé - Google Patents

Procédé et appareil de fabrication d'un corps moulé Download PDF

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Publication number
WO2019009362A1
WO2019009362A1 PCT/JP2018/025532 JP2018025532W WO2019009362A1 WO 2019009362 A1 WO2019009362 A1 WO 2019009362A1 JP 2018025532 W JP2018025532 W JP 2018025532W WO 2019009362 A1 WO2019009362 A1 WO 2019009362A1
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WIPO (PCT)
Prior art keywords
zone
molten resin
vent
screw
plasticizing
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Application number
PCT/JP2018/025532
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English (en)
Japanese (ja)
Inventor
遊佐　敦
智史 山本
英斗 後藤
Original Assignee
マクセル株式会社
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Application filed by マクセル株式会社 filed Critical マクセル株式会社
Priority to JP2019527962A priority Critical patent/JP7033594B2/ja
Publication of WO2019009362A1 publication Critical patent/WO2019009362A1/fr

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    • 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
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/47—Means for plasticising or homogenising the moulding material or forcing it into the mould using screws
    • B29C45/50—Axially movable screw
    • 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
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/58—Details
    • B29C45/63—Venting or degassing means

Definitions

  • the present invention relates to a method and an apparatus for producing a molded body.
  • a molding machine for resin material there is a molding machine provided with a vent (vent hole) for discharging the volatile component generated in the plasticizing cylinder to the outside of the plasticizing cylinder, a so-called vent type molding machine (For example, Patent Documents 1 to 3).
  • the volatile components to be discharged are mainly water contained in the resin material, unreacted monomers and the like.
  • a vent-type molding machine volatile components can be removed from the resin material during molding, so pre-drying of the resin material performed before molding can be omitted.
  • Volatile components contained in the resin material adversely affect the surface properties of the molded product and cause mold stains. Therefore, by removing the volatile component from the resin material, the surface property of the molded body can be improved, and the number of maintenance of the mold can be reduced.
  • Patent Documents 1 to 3 also disclose a mechanism for suppressing the vent up, but this was not sufficient. Further, in recent years, there has been a demand for a vent-type molding machine capable of more efficiently removing volatile components in a resin material in order to further improve the surface properties of the molded body.
  • the present invention solves the above-mentioned problems, and is a method for producing a molded article using a vent-type molding machine, which more efficiently volatilizes volatile components in a resin material while suppressing the vent up during molding.
  • the present invention provides a method of removing and producing a molded article having excellent surface properties.
  • a method for producing a molded article comprising, from the upstream side, a plasticizing zone in which a thermoplastic resin is plasticized and melted to become a molten resin, and a flow rate of the molten resin In the plasticization zone, using a plasticizing cylinder having a flow rate adjustment zone to be adjusted and a starvation zone in which the molten resin is starved, and a vent for discharging a volatile component to the starvation zone is formed.
  • Process for producing a molded article comprising is provided.
  • the pressure reduction and compression of the molten resin may be performed once or more each in the flow rate adjustment zone. Moreover, in the flow velocity adjustment zone, the flow velocity of the molten resin may be gradually increased along the flow direction of the molten resin.
  • the thermoplastic resin may include or be a super engineering plastic.
  • the vent of the plasticizing cylinder is further provided with a degassing acceleration mechanism in which a discharge path of the volatile component is formed inside, and the maximum value of the inner diameter of the discharge path of the degassing acceleration mechanism is the vent It may be larger than the inner diameter of.
  • a manufacturing apparatus for manufacturing a thermoplastic resin into a molded body comprising: a plasticizing cylinder; and a plasticizing screw rotatably provided inside the plasticizing cylinder.
  • a plasticizing zone in which the thermoplastic resin is plasticized and melted to become a molten resin, a compression zone for compressing the molten resin, and a flow velocity adjusting zone for adjusting the flow velocity of the molten resin in the plasticizing cylinder And a starvation zone in which the molten resin is starved is formed in this order from the upstream, and a vent for discharging the volatile component separated from the molten resin is formed in the starvation zone.
  • a body manufacturing device is provided.
  • the plasticizing screw has one or more pressure reducing portions and one or more pressure reducing portions in the portion positioned in the flow velocity adjusting zone, and the diameter of the screw shaft of the pressure reducing portion is located in the compression zone
  • the diameter of the screw shaft of the compression unit may be smaller than the maximum diameter of the shaft diameter of the partial screw, and the diameter of the screw shaft of the compression unit may be larger than the minimum diameter of the screw shaft of the pressure reduction unit.
  • the diameter of the screw shaft of the pressure reducing section may be constant, or may be continuously reduced from upstream to downstream.
  • the winding direction of the screw flight of the compression unit may be opposite to the winding direction of the screw flight of the pressure reduction unit.
  • a pitch of a screw flight of a portion located in the flow velocity adjustment zone may be smaller than a pitch of a screw flight of a portion located in the starvation zone. Further, in the flow velocity adjustment zone, the diameter of the shaft of the plasticizing screw may be continuously reduced from the upstream toward the downstream.
  • the plasticizing screw may have a screw flight in which a notch is formed in a portion located in the flow velocity adjustment zone.
  • the vent is further provided with a degassing acceleration mechanism having a discharge path of the volatile component formed therein, and the maximum value of the inner diameter of the discharge path of the degassing acceleration mechanism is larger than the inner diameter of the vent.
  • the degassing acceleration mechanism may have a tapered portion in which the inner diameter of the discharge passage increases as the distance from the vent increases.
  • the deaeration promoting mechanism further includes a cylindrical straight portion in which the inner diameter of the discharge path does not change, the straight portion is connected to the vent, and the tapered portion is disposed adjacent to the straight portion. It is also good. Furthermore, the length in the extension direction of the cylindrical straight portion may be equal to or less than twice the thickness of the side wall of the plasticizing cylinder.
  • the ratio of the maximum value of the inner diameter of the discharge passage to the inner diameter of the vent may be 20 or less.
  • a Teflon (registered trademark) -containing plating film may be formed on the inner wall of the degassing acceleration mechanism that partitions the discharge path.
  • the inner diameter of the vent may be 20% to 100% of the inner diameter of the plasticizing cylinder.
  • the method for producing a molded article of the present invention is a method for producing a molded article using a vent-type molding machine, and can suppress the vent up during molding. Moreover, the molded object excellent in surface property can be manufactured.
  • FIGS. 4 (a) to 4 (e) are schematic views of other examples of the plasticizing screw provided in the plasticizing cylinder used in the embodiment. It is the schematic of the degassing acceleration
  • the manufacturing apparatus 1000 mainly includes a plasticizing cylinder 210 in which a screw (plasticizing screw) 20 is rotatably provided, a mold clamping unit 250 provided with a mold 251, the plasticizing cylinder 210, and the mold clamping unit A controller (not shown) is provided to control the operation of the controller 250.
  • the molten resin plasticized and melted in the plasticizing cylinder 210 flows from the right hand in FIG. 2 toward the left hand. Therefore, in the plasticizing cylinder 210 of the present embodiment, the right hand in FIG. 2 is defined as “upstream” or “rearward” and the left hand as “downstream” or “frontward”.
  • a plasticizing zone 21 for plasticizing and melting a thermoplastic resin into a molten resin a plasticizing zone 21 for plasticizing and melting a thermoplastic resin into a molten resin
  • a compression zone 22 for compressing the molten resin a flow velocity adjustment for adjusting the flow velocity of the molten resin in order from the upstream side A zone 25 and a starvation zone 23 starved of molten resin are formed.
  • the “starved state” is a state in which the molten resin does not fill the starvation zone 23 and becomes unfilled. Therefore, a space other than the occupied portion of the molten resin exists in the starvation zone 23.
  • the resin supply port 201 for supplying the thermoplastic resin to the plasticizing cylinder 210 and the volatile component separated from the molten resin are discharged out of the plasticizing cylinder 210 sequentially from the upstream side.
  • a vent (vent hole) 202 is formed and released to the atmospheric pressure.
  • a resin supply hopper 211 and a feeder screw 212 are disposed at the resin supply port 201, and a degassing acceleration mechanism 300 is disposed at the vent 202.
  • a vent 202 which is open to atmospheric pressure is formed in the starvation zone 23.
  • the starvation zone 23 is likewise maintained at atmospheric pressure.
  • Volatile components of the thermoplastic resin are discharged from the vent 202 through the degassing acceleration mechanism 300 to the outside of the plasticizing cylinder 210.
  • the "volatile component" separated from the molten resin mainly refers to the moisture and unreacted monomers contained as impurities in the thermoplastic resin as the raw material, or the decomposition component of the thermoplastic resin generated in the molding machine And separate from the molten resin as a gas during molding.
  • the manufacturing apparatus 1000 has only the flow velocity adjustment zone 25 and the starvation zone 23, the manufacturing apparatus used for this embodiment is not limited to this.
  • the manufacturing apparatus 1000 in order to promote the discharge of the volatile component, the flow velocity control zone 25 and the starvation zone 23, and further has a plurality of vents 202 formed in the starvation zone 23, and the volatile component is discharged from the plurality of vents 202.
  • the manufacturing apparatus 1000 is an injection molding apparatus, the manufacturing apparatus used in the present embodiment is not limited to this, and may be, for example, an extrusion molding apparatus.
  • thermoplastic resin is plasticized and melted to be a molten resin (Step S1 in FIG. 1).
  • a resin such as so-called engineering plastic or super engineering plastic can be used according to the type of the target molded body.
  • polypropylene PP
  • polymethyl methacrylate PMMA
  • polyamide 6 PA 6
  • PA 66 PA 66
  • PC polycarbonate
  • APO amorphous polyolefin
  • PBT polybutylene terephthalate
  • PET polyethylene terephthalate
  • ABS resin acrylonitrile butadiene styrene copolymer resin
  • PPS polyphenylene sulfide
  • PPSU polyphenyl sulfone
  • PSU polysulfone
  • PAR polyarylate
  • PEI polyether imide
  • PEEK polyether ether ketone
  • PES polyamide imide
  • LCP polylactic acid and the like.
  • the manufacturing method of the present embodiment is suitable for forming a super engineering plastic (hereinafter, appropriately referred to as “super engineering plastic”).
  • super engineering plastic plastics with continuous use temperatures of 150 ° C. or higher are generally classified as super engineering plastic. Since super engineering plastics have a high melting temperature, the molten resin tends to generate more volatile components.
  • many polymer alloys containing super engineering plastics have been developed. In the case of a polymer alloy of resins having different melting temperatures, part of the resin having a lower melting temperature may be separated from the molten resin as a decomposition gas. In the manufacturing method of the present embodiment, these volatile components can be efficiently removed.
  • amorphous (transparent) resins include polyphenylsulfone (PPSU), polysulfone (PSU), polyarylate (PAR), and polyetherimide (PEI).
  • crystalline resins include, for example, polyether Ether ketone (PEEK), polyphenylene sulfide (PPS), polyether sulfone (PES), polyamide imide (PAI), liquid crystal polymer (LCP), polyvinylidene fluoride (PVDF) are mentioned, and among them, polyphenylene sulfide (PPS), liquid crystal Polymer (LCP) is more preferred.
  • thermoplastic resins described above may be used alone or in combination of two or more. Moreover, you may use the polymer alloy and composite material which contain these thermoplastic resins. Moreover, you may use what knead
  • thermoplastic resin resin pellet
  • a band heater (not shown) is disposed on the outer wall surface of the plasticizing cylinder 210, thereby heating the plasticizing cylinder 210 and further adding shear heat generation due to the rotation of the screw 20 to plasticize the thermoplastic resin. It is melted and becomes a molten resin.
  • the rotation speed of the feeder screw 212 is controlled to the rotation speed at which the thermoplastic resin (resin pellet) is starved.
  • the starvation supply of the resin pellet means that the resin cylinder or the molten resin does not fill the plasticizing cylinder in the plasticizing zone 21 during the supply of the resin pellet, and the supplied resin pellet or the molten resin thereof To the state where the screw flight of the screw 20 is exposed.
  • the method of confirming the presence or absence of the resin pellet or the molten resin on the screw 20 with an infrared sensor or a visualization camera is mentioned, for example.
  • the supply amount of the thermoplastic resin is limited, the starvation state of the molten resin in the starvation zone 23 described later can be stabilized, the vent up can be further suppressed, and the discharge of volatile components is further promoted.
  • Ru the separation of volatile components from the molten resin mainly occurs in the flow velocity control zone 25 and the starvation zone 23 described later, but may slightly occur in the compression zone 22 and the plasticization zone 21 upstream therefrom.
  • the preliminary drying of the thermoplastic resin before being introduced into the plasticizing cylinder 210 is not particularly required, but the preliminary drying may be performed.
  • water contained in the thermoplastic resin may be mainly removed by preliminary drying, and volatile components other than water such as unreacted monomers and decomposition gas may be mainly removed during molding.
  • the compression zone 22 will be described.
  • the molten resin is starved in the starvation zone 23.
  • the state of starvation is determined by the balance between the amount of molten resin fed from the upstream of the starvation zone 23 to the starved zone 23 and the amount of molten resin fed from the starvation zone 23 to the downstream thereof. It becomes.
  • this condition is realized by providing the compression zone 22 upstream of the starvation zone 23.
  • the compression zone 22 is provided with a large diameter portion 20A in which the diameter (screw diameter) of the shaft of the screw 20 is larger (thicker) than the plasticizing zone 21 located on the upstream side, and the screw flight is made shallow.
  • the large diameter portion 20A is a mechanism that enhances the flow resistance of the molten resin.
  • the mechanism for increasing the flow resistance of the molten resin provided in the compression zone 22 is a mechanism for temporarily reducing the flow passage area through which the molten resin passes to limit the resin flow rate supplied from the compression zone 22 to the starvation zone 23.
  • the screw 20 is provided with a portion where the pitch of the screw flight is narrowed, a portion where the number of flights is increased, a portion where the winding direction of the screw flight is reversed, etc. May be
  • a flow velocity adjustment zone 25 is provided between the compression zone 22 and the starvation zone 23. Comparing the flow rate of the molten resin in the compression zone 22 upstream of the flow rate adjustment zone 25 with the flow rate of the molten resin in the downstream starvation zone 23, the flow rate of the molten resin in the starvation zone 23 is faster.
  • the compression zone 22 and the starvation zone 23 are disposed adjacent to each other.
  • the inventors provide a flow velocity adjusting zone 25 serving as a buffer zone between the compression zone 22 and the starvation zone 23 and is manufactured by suppressing this rapid change (rise) in the flow velocity of the molten resin. It has been found that the surface property of the molded body is improved and the vent up from the vent 202 formed in the starvation zone 23 is suppressed.
  • the flow rate of the molten resin can be adjusted, for example, by providing a mechanism for adjusting the flow rate of the molten resin in a portion of the plasticizing screw 20 located in the flow rate adjusting zone 25.
  • a plasticizing screw 20 shown in FIG. 3 is used.
  • the plasticizing screw 20 has a large diameter portion 20A, a pressure reducing portion 20C, a compression portion 20D, and a small diameter portion 20B in this order from the upstream side.
  • the large diameter portion 20A is located in the compression zone 22, the decompression unit 20C and the compression portion 20D are located in the flow velocity adjustment zone 25, and the small diameter portion 20B is located in the starvation zone 23.
  • the decompression unit 20C and the compression unit 20D correspond to a mechanism that adjusts the flow rate of the molten resin.
  • the depressurizing portion 20C has a smaller screw diameter (diameter of the screw shaft) than the upstream large diameter portion 20A, and a deep screw flight.
  • the compression section 20D has a large screw diameter and a shallow depth of screw flight as compared with the upstream portion (pressure reduction portion 20C) and the downstream portion (small diameter portion 20B). That is, in the present embodiment, the diameter of the shaft of the screw 20 of the decompression unit 20C is smaller than the maximum value (large diameter portion 20A) of the diameter of the shaft of the screw 20 located in the compression zone 22.
  • the diameter of the axis of screw 20 of compression part 20D is larger than the minimum of the diameter of the axis of screw 20 of decompression part 20C.
  • the molten resin flowing from the compression zone 22 to the flow velocity adjustment zone 25 is decompressed in the depressurization section 20C where the depth of the screw flight is deep, and then recompressed by the compression section 20D where the screw flight depth is shallow, It flows to the starvation zone 23.
  • the residence time of the molten resin in the flow velocity adjustment zone 25 can be secured by decompressing and compressing (pressurizing) the molten resin.
  • the flow velocity adjusting zone 25 acts as a buffer zone or a molten resin stagnant zone to adjust the flow velocity of the molten resin (step S2 in FIG. 1), and as a result, the molten resin flows from the compression zone 22 to the starvation zone 23 Rapid increase in the flow velocity can be suppressed.
  • the compression zone 22 has a high resin pressure and the starvation zone 23 has a low resin pressure.
  • the resin pressure drops sharply.
  • the plasticizing cylinder 210 using the screw 20 shown in FIG. 3 of the present embodiment the molten resin flowing from the compression zone 22 to the starvation zone 23 passes rapidly through the flow velocity adjustment zone 25. Downstream to the starvation zone 23 without any change in resin pressure. From this point of view, the flow velocity adjustment zone 25 is also a gradual pressure reduction zone for molten resin pressure.
  • the surface property of the molded body is improved, and the details of the reason why the vent up from the vent 202 is suppressed are unknown. Although there is, it is guessed as follows.
  • the molten resin is rapidly depressurized in the starvation zone 23, whereby the volatile components are separated from the molten resin in the starvation zone 23.
  • the molten resin flows to the starvation zone 23 after being gradually depressurized in the flow velocity adjustment zone 25.
  • volatile components are gradually separated from the molten resin. That is, according to the manufacturing method of the present embodiment, volatile components are separated from the molten resin gently and for a long time as compared with the conventional manufacturing method. As a result, it is estimated that more volatile components can be separated and removed from the molten resin, and the surface properties of the molded body are improved. Further, in the present embodiment, since the molten resin is not rapidly depressurized in the starvation zone 23, the vent up from the vent 202 provided in the starvation zone 23 is also suppressed.
  • the pressure reducing portion 20C and the compressing portion 20D are provided in the flow velocity adjusting zone 25, and the pressure reduction and compression of the molten resin are performed in a short cycle. It is speculated that this short cycle decompression and compression of the molten resin promotes the separation of the molten resin and the volatile components, and as a result, the surface properties of the molded product are further improved.
  • the mechanism described above is speculative and does not affect the interpretation of the present invention.
  • the flow velocity of the molten resin is adjusted in the flow velocity adjustment zone 25 by the screw 20 shown in FIG. 3, but the present embodiment is not limited to this. If it is the structure which can adjust the flow rate of molten resin in the flow rate adjustment zone 25, it may replace with the screw 20 and the screw of arbitrary structures can be used. For example, screws 20a to 20e shown in FIGS. 4 (a) to 4 (e) described below may be used.
  • the screw 20 shown in FIG. 3 has only one depressurizing portion 20C and only one compression portion 20D, but as shown in FIG. 4A, it has a plurality of depressurization portions 20C and compression portions 20D. May be That is, the screw of the present embodiment may have one or more pressure reducing parts 20C and one or more compression parts 20D.
  • the pressure reduction and compression of the molten resin can be repeated a plurality of times to further promote the separation of the molten resin and the volatile component.
  • the plasticizing cylinder 210 may be too long, and the manufacturing efficiency may be reduced. Therefore, it is preferable to provide one to four pressure reducing parts 20C and one compression part 20D in the screw 20, and it is more preferable to provide one or two pressure reducing parts 20C and one compression part 20D.
  • the screw diameter (diameter of the screw shaft) of the depressurizing portion 20C and the depth of the screw flight are constant, but from the upstream as in the screw 20b shown in FIG.
  • the screw diameter (diameter of the shaft of the screw) of the decompression unit 20C may be continuously reduced (thinned) toward the downstream, and the depth of the screw flight may be continuously increased accordingly.
  • the flow velocity of the molten resin is adjusted by providing the pressure reducing portion 20C and the compression portion 20D in a portion of the plasticizing screw 20 located in the flow velocity adjusting zone 25. It is not limited to this.
  • a screw flight F in which a plurality of notches n are formed in a portion located in the flow velocity adjustment zone 25 may be provided.
  • a screw flight F in which a plurality of notches n are formed corresponds to a mechanism that adjusts the flow rate of the molten resin. If the screw flight is provided with a notch, the molten resin is difficult to flow.
  • the molten resin passes from the flow velocity adjusting zone 25 while gradually increasing the flow velocity from the compression zone 22 to the starvation zone 23.
  • the flow velocity adjusting zone 25 can send the molten resin from the upstream compression zone 22 to the downstream starvation zone 23 without a rapid flow velocity change.
  • the molten resin passes from the flow velocity adjusting zone 25 toward the starvation zone 23 from the compression zone 22 while gradually reducing the pressure of the molten resin.
  • the flow velocity adjusting zone 25 can send the molten resin from the upstream compression zone 22 to the downstream starvation zone 23 without a rapid pressure change of the molten resin.
  • a so-called labyrinth structure may be formed in the screw 20c by a screw flight in which a plurality of notches n are formed.
  • the labyrinth structure corresponds to a mechanism for adjusting the flow rate of the molten resin.
  • the portion located in the flow velocity adjustment zone 25 of the screw has a screw flight F in which a plurality of notches n are formed, and the screw diameter is further upstream It may be continuously reduced in the downstream direction.
  • the flow velocity of the molten resin can be increased by using two or more multi-row flights, narrowing the pitch of the screw flight, increasing the number of flights, reversing the winding direction of the screw flight, etc. You may adjust. If a plurality of configurations such as a notch of a screw flight and shortening of a flight pitch are further combined with the decompression unit 20C and the compression unit 20D of the screw 20 shown in FIG. 3, more volatile components can be separated from the molten resin. For example, in the screw 20e shown in FIG.
  • the pressure reducing portion 20C and the compressing portion 20D are provided in the portion located in the flow velocity adjusting zone 25, and the flight pitch of the screw is reduced (smaller) than the flight pitch of the starvation zone 23. Furthermore, it is an example which made the winding direction of flight of compression part 20D reverse to the winding direction of decompression part 20C.
  • the length of the flow velocity adjusting zone 25 in the flow direction of the molten resin is preferably 2 to 6 times the inner diameter of the plasticizing cylinder 210, and more preferably 2 to 4 times. If the length of the flow velocity adjustment zone 25 is in this range, volatile components can be sufficiently separated from the molten resin.
  • the length of the flow velocity adjustment zone 25 is a zone in the plasticizing cylinder 210 where the flow velocity of the molten resin is faster than that of the compression zone 22 and the flow velocity of the molten resin is slower than that of the starvation zone 23.
  • the length of The length of the flow velocity adjustment zone 25 can be determined by those skilled in the art from, for example, the shape of the plasticizing screw 20 and the like.
  • the length of the flow velocity adjusting zone 25 is the pressure reducing portion 20C in the flow direction of the molten resin.
  • the total length of the compression unit 20D In the screws 20c and 20d shown in FIGS. 4 (c) and 4 (d), it is the length of a portion having a screw flight F in which a plurality of notches n are formed in the flow direction of the molten resin.
  • the screw 20 In order to promote the starvation condition of the molten resin, the screw 20 has a smaller (thin) shaft diameter in the portion located in the starvation zone 23 compared to the portion located in the compression zone 22 (large diameter portion 20A), And screw flight has a deep structure (small diameter portion 20B).
  • the length of the starvation zone 23 in the flow direction of the molten resin is preferably long in order to promote the discharge of volatile components from the molten resin, but if it is too long, the molding cycle and screw length become long. It will cause harmful effects. Therefore, the length of the starvation zone 23 is preferably 2 to 12 times the inner diameter of the plasticizing cylinder 210, and more preferably 4 to 10 times.
  • the length of the starvation zone 23 preferably covers the full range of metering strokes in injection molding. That is, the length of the starvation zone 23 in the flow direction of the molten resin is preferably equal to or greater than the length of the measurement stroke in injection molding.
  • the screw 20 moves forward and backward along with the plasticizing measurement and injection of the molten resin, but by making the length of the starvation zone 23 longer than the length of the measurement stroke, the vent 202 is always produced during the production of the molded product. Can be placed (formed) within the starvation zone 23. In other words, if the screw 20 moves forward and backward during the production of the molded body, zones other than the starvation zone 23 will not come to the position of the vent 202.
  • the length of the starvation zone 23 is the length of a portion (small diameter portion 20B) in the screw 20 in which the diameter of the shaft of the screw 20 and the depth of the screw flight are constant. It is almost the same.
  • the pressure in the starvation zone 23 is preferably below atmospheric pressure. From the viewpoint of avoiding rapid pressure reduction of the molten resin, the pressure of the starvation zone 23 is preferably atmospheric pressure. On the other hand, from the viewpoint of efficiently discharging the volatile component, the pressure of the starvation zone 23 may be reduced to less than the atmospheric pressure using a vacuum pump or the like, and the volatile component may be sucked and exhausted from the vent 202.
  • the volatile components separated from the molten resin in the flow velocity adjustment zone 25 and the starvation zone 23 are discharged from the vent (vent hole) 202 (step S4 in FIG. 1).
  • the vent 202 has a large inside diameter D1 (see FIG. 5) as compared to the vent of the conventional manufacturing apparatus. Because the inner diameter D1 is large, the vent 202 can function as a discharge port for the volatile component without completely blocking the molten resin even when a part of the molten resin is solidified by contacting the vent 202. On the other hand, if the inner diameter D1 of the vent 202 is too large, retention of the molten resin occurs to cause molding defects, and the degassing promoting mechanism 300 connected to the vent 202 is enlarged to increase the cost of the entire apparatus.
  • the inner diameter D1 of the vent 202 is preferably 20% to 100% of the inner diameter of the plasticizing cylinder 210, and more preferably 25% to 80%.
  • the inner diameter D1 of the vent 202 is preferably 3 mm to 150 mm, and more preferably 5 mm to 100 mm.
  • the inner diameter D1 of the vent 202 means the inner diameter of the opening on the inner wall 210a of the plasticizing cylinder 210 shown in FIG.
  • the shape of the vent 202 that is, the shape of the opening on the inner wall 210a of the plasticizing cylinder 210 is not limited to a perfect circle, and may be an ellipse or a polygon. When the shape of the vent 202 is an ellipse or a polygon, the diameter of a true circle having the same area as the area of the vent 202 is defined as the “inner diameter D1 of the vent 202”.
  • the vent 202 in order to promote the discharge of the volatile component from the vent 202, it is preferable to provide the vent 202 with a degassing acceleration mechanism 300.
  • the degassing promotion mechanism 300 will be described.
  • the degassing acceleration mechanism 300 used in the present embodiment mainly comprises a cylindrical main body 310 and a connecting member 320 for connecting the main body 310 to the plasticizing cylinder 210, as shown in FIG.
  • a discharge path 312 of the volatile component separated from the resin is formed.
  • One end of the cylindrical main body 310 is connected to the vent 202 via the connecting member 320, and the starvation zone 23 of the plasticizing cylinder 210 and the discharge passage 312 communicate with each other via the vent 202.
  • the degassing promotion mechanism 300 when focusing on the shape of the discharge path 312 of the degassing promotion mechanism 300, the degassing promotion mechanism 300 is connected to the vent 202, and the cylindrical first straight portion 31 whose inner diameter does not change, and the first straight portion 31 has a tapered portion 32 which is provided adjacent to 31 and whose inner diameter increases with distance from the vent 202, and a cylindrical second straight portion 33 which is provided adjacent to the tapered portion 32 and whose inner diameter does not change . That is, as shown in FIG. 5, the degassing acceleration mechanism 300 has a first straight portion 31 which is a cylinder having a small inner diameter D1 and a second straight portion 33 which is a cylinder having a large inner diameter D2 as shown in FIG.
  • the axes are arranged on the same straight line m, and the first straight portion 31 and the second straight portion 33 are connected by the tapered surface of the tapered portion 32.
  • the extending direction of the straight line m coinciding with the central axes of the first straight portion 31 and the second straight portion 33 is defined as the extending direction of the degassing promotion mechanism 300.
  • the first straight portion 31 is configured by the connecting member 320, and the tapered portion 32 and the second straight portion 33 are configured by the main body 310.
  • the maximum value D2 of the inner diameter of the degassing acceleration mechanism 300 (the inner diameter of the discharge passage 312) is larger than the inner diameter D1 of the vent 202 (D2> D1).
  • the maximum value D2 of the inner diameter of the degassing promotion mechanism 300 means a section having the largest area in the cross section of the discharge passage 312 orthogonal to the extending direction (straight line m) of the degassing promotion mechanism 300 (hereinafter referred to as “maximum Means the inner diameter of the section).
  • the shape of the maximum cross section is not limited to a perfect circle, and may be an ellipse or a polygon.
  • the diameter of a true circle having the same area as the largest cross section is defined as "the maximum value D2 of the inner diameter of the deaeration promoting mechanism 300".
  • the inner diameter D1 of the vent is equal to the inner diameter of the first straight portion 31, ie, the inner diameter of the connecting member 320, and the maximum value D2 of the inner diameter of the deaeration promoting mechanism 300 is the same as that of the second straight portion 33 of the main body 310. Equal to the inner diameter.
  • the degassing acceleration mechanism 300 having this feature (D2> D1) facilitates securing the flow path of the volatile component, as described below, and promotes the discharge of the volatile component.
  • the molten resin hardly bulges out of the vent 202 even if the inner diameter of the vent 202 is large.
  • the molten resin may still intrude or bulge out of the vent 202 into the inside of the deaeration promoting mechanism 300.
  • the degassing acceleration mechanism 300 can remove the heat of the molten resin, reduce the fluidity, and further solidify it. Solidification of the molten resin prevents the molten resin from entering the degassing promotion mechanism 300 further.
  • the degassing acceleration mechanism 300 has a configuration in which the inner diameter gradually increases from D1 and becomes D2 as the distance from the vent 202 increases. The farther away from the vent 202, the more the molten resin that has infiltrated, the more heat is absorbed and the more easily it solidifies. However, in the degassing acceleration mechanism 300 of this embodiment, the discharge path 312 becomes wider as it gets away from the vent 202.
  • the molten resin in contact with the wall surface of the discharge passage 312 is solidified, it is possible to suppress that the discharge passage 312 is completely blocked by the molten resin solidified.
  • the molten resin can maintain a molten state having fluidity in the vicinity of the center of the discharge passage 312 separated from the wall surface. Thereby, the flow passage of the volatile component of the degassing acceleration mechanism 300 can be secured. It is not always necessary that the tapered portion 32 be connected to the end of the first straight portion 31. If the inner diameter is expanded from the end of the first straight portion 31, the flow path of the volatile component Is secured.
  • the angle of the inner wall of the tapered portion 32 with respect to the extending direction (straight line m) of the degassing acceleration mechanism 300 is 45 degrees.
  • 20 degrees or more and 90 degrees or less are preferable in achieving the above-mentioned effect, and 25 degrees or more and 65 degrees or less are more preferable.
  • the case where the angle of the inner wall of the tapered portion 32 is 90 degrees means the case where the first straight portion 31 and the second straight portion 33 are connected by a plane perpendicular to the straight line m.
  • the ratio (D2) of the maximum value of the inner diameter of the degassing promotion mechanism to the inner diameter (D1) of the vent (D2) D2 / D1) is greater than one.
  • the ratio (D2 / D1) is preferably 2 or more.
  • the degassing acceleration mechanism 300 is preferably smaller, and the ratio (D2 / D1) is, for example, 20 or less, preferably 10 or less.
  • the ratio (D2 / D1) described above may be relatively small.
  • the ratio (D2 / D1) of the maximum value (D2) of the inner diameter of the degassing acceleration mechanism to the inner diameter (D1) of the vent is, for example, more than 1 and 3 or less, preferably more than 1 2 or less.
  • the length (height) h in the extending direction (straight line m in FIG. 5) of the cylindrical first straight portion 31 is not more than twice the thickness d of the side wall of the plasticizing cylinder 210 Is preferable, and 1 times or less is more preferable. If the length h of the first straight portion 31 is within the above range, the possibility that the flow path of the volatile component in the degassing acceleration mechanism 300 is blocked by the solidified molten resin is further reduced.
  • the lower limit value of the length (height) h of the cylindrical first straight portion 31 is not particularly limited, and is, for example, 0.1 times or more the thickness d of the side wall of the plasticizing cylinder 210 substantially Preferably, it is 0.3 times or more.
  • the material constituting the degassing acceleration mechanism 300 has a large heat capacity and is hard to rise in temperature, from the viewpoint of promoting the solidification of the molten resin on the wall surface and suppressing the penetration of the molten resin into the inside. Materials that are easy to steal are preferred. From these viewpoints, the degassing acceleration mechanism 300 is preferably made of, for example, a metal such as stainless steel (SUS).
  • the connection member 320 is also the same.
  • a Teflon (polytetrafluoroethylene, PTFE) -containing plating film is formed on the inner wall of the degassing acceleration mechanism 300, that is, the inner wall that defines the discharge passage 312.
  • the Teflon-containing plating film may be formed on the entire inner wall of the degassing acceleration mechanism 300 or may be formed on only a part.
  • the resin When a resin adheres to the inner wall during a long period of time during molding of the molded body, the resin is carbonized and fixed, and is later peeled off to cause molding failure.
  • a Teflon-containing plating film By forming a Teflon-containing plating film on the inner wall of the degassing promotion mechanism 300, the adhesion of the molten resin can be suppressed.
  • the Teflon-containing plating film in particular, the Teflon-containing electroless nickel phosphorus plating film has high heat resistance and scratch resistance, is high in hardness, and is also excellent in the coverage to a complex-shaped object to be plated.
  • Teflon-containing plating film As another surface treatment method which can impart water repellency or oiliness to the inner wall of the degassing acceleration mechanism 300 and is also excellent in heat resistance, surface treatment using an excimer laser can be mentioned. However, since it is very difficult to perform surface treatment using an excimer laser on the inner wall of the degassing promotion mechanism 300, it is preferable to form a Teflon-containing plating film.
  • the content of Teflon in the electroless plating film is preferably 10 to 50% by weight from the balance of the stability of the plating film and the releasability of the adhering molten resin.
  • the degassing promotion mechanism 300 used by this embodiment is not limited to this structure.
  • a configuration in which the degassing acceleration mechanism does not have the tapered portion 32 can be mentioned. That is, the first straight portion 31 and the second straight portion 33 may be connected by a plane orthogonal to the extending direction (straight line m) of the degassing promotion mechanism 300 instead of the tapered surface.
  • stimulation mechanism does not have the 1st straight part 31 is mentioned as a 2nd modification.
  • the tapered portion 32 is connected to the vent 202 which is an opening on the inner wall 210 a of the plasticizing cylinder 210. That is, in the side wall of the plasticizing cylinder 210, the inner diameter of the degassing acceleration mechanism 300 is expanded as it is separated from the inner wall 210a.
  • the degassing acceleration mechanism 300 may be a separate body from the plasticizing cylinder 210 or may be integrally formed with the plasticizing cylinder 210 and may constitute a part of the plasticizing cylinder 210.
  • the plasticizing cylinder 210 used in the present embodiment is disposed downstream of the starvation zone 23 adjacent to the starvation zone 23 and has a recompression zone 24 in which the molten resin is compressed to increase the pressure.
  • the molten resin in the starvation zone 23 is caused to flow into the recompression zone 24 by the rotation of the plasticizing screw 20.
  • the molten resin is pressure-regulated in the recompression zone 24 and pushed forward of the plasticizing screw 20 for metering.
  • the internal pressure of the molten resin extruded to the front of the plasticizing screw 20 is controlled as a screw back pressure by a hydraulic motor or an electric motor (not shown) connected to the rear of the plasticizing screw 20.
  • the molding method of the molded body is not particularly limited.
  • the molded body can be molded by injection molding, extrusion molding, blow molding or the like.
  • the molten resin measured in the cavity 253 in the mold 251 is injected and filled from the plasticizing cylinder 210 shown in FIG. 2 and injection molding is performed to obtain a molded body.
  • Volatile components which are separated and removed from the molten resin before molding in the present embodiment cause, for example, the clouding of the surface of the molded product due to silver streaks and the decrease in smoothness.
  • a molded article having excellent surface properties by sufficiently separating and removing volatile components from the molten resin more specifically, a molded article having a smooth surface on which silver streaks are suppressed Is obtained.
  • Example 1 In this example, a polymer alloy of polyphenylene sulfide (PPS) and an elastomer (manufactured by DIC, Z-230) was used as the thermoplastic resin.
  • the thermoplastic resin (resin pellet) was preliminarily dried at 120 ° C. for 4 hours.
  • the manufacturing device 1000 shown in FIG. 2 used in the above-described embodiment was used.
  • the manufacturing apparatus 1000 is an injection molding apparatus, and the plasticizing cylinder 210 in which the screw (plasticizing screw) 20 is rotatably provided, and the mold clamping unit 250 provided with the mold 251, the plasticization A controller (not shown) for controlling the operation of the cylinder 210 and the clamping unit 250 is provided.
  • a plasticizing zone 21, a compression zone 22, a flow velocity adjusting zone 25, a starvation zone 23, and a recompression zone 24 are formed in this order from the upstream.
  • the starvation zone 23 is provided with a vent 202 for discharging volatile components, and the vent 202 is provided with a degassing acceleration mechanism 300.
  • the mold 251 is in close contact with the nozzle tip 29 of the plasticizing cylinder 210, and the molten resin is injected and filled from the nozzle tip 29 into the cavity 253 formed by the mold 251.
  • a Teflon-containing electroless nickel phosphorus plating film was formed on the main body 310 of the degassing acceleration mechanism 300 shown in FIG. 5 and the inner wall of the connecting member 320.
  • the thickness of the plating film was 20 ⁇ m, and the content of Teflon in the plating film was about 30% by weight.
  • the inside diameter of the plasticizing cylinder 210 was 22 mm, and the inside diameter of the vent 202 was 6 mm.
  • the inside diameter D 1 of the vent 202 was about 27% of the inside diameter of the plasticizing cylinder 210.
  • the length of the flow velocity adjustment zone 25 in the flow direction of the molten resin was 44 mm. Therefore, the length of the flow velocity adjustment zone 25 was twice the inner diameter (22 mm) of the plasticizing cylinder 210.
  • the length of the starvation zone 23 (the length of the small diameter portion 20B) in the flow direction of the molten resin was 210 mm.
  • the length of starvation zone 23 was about 9.5 times the inside diameter of plasticizing cylinder 210.
  • the maximum value D2 of the internal diameter of the degassing acceleration mechanism 300 was 60 mm. Therefore, the maximum value D2 of the inner diameter of the degassing acceleration mechanism 300 was larger than the inner diameter D1 (6 mm) of the vent (D2> D1), and the ratio (D2 / D1) was 10.
  • the length h of the first straight portion 31 of the degassing acceleration mechanism 300 was 12 mm, and the thickness d of the side wall of the plasticizing cylinder 210 was 40 mm. Therefore, the length h of the first straight portion 31 was 0.3 times the thickness d of the side wall of the plasticizing cylinder 210.
  • a mold in which the size of the cavity 253 is 50 mm ⁇ 50 mm ⁇ 2 mm was used.
  • the bandized zone 21 is 300 to 320 ° C.
  • the compression zone 22 is 320 ° C.
  • the flow velocity adjusting zone 25 and the starvation zone 23 are 300 ° C. by a band heater (not shown).
  • Recompression zone 24 was adjusted to 320 ° C.
  • resin pellets of thermoplastic resin were supplied to the plasticizing cylinder 210 from the resin supply hopper 211 while rotating the feeder screw 212 at a rotation speed of 30 rpm, and the screw 20 was rotated forward. Thereby, in the plasticization zone 21, the thermoplastic resin was heated and kneaded to obtain a molten resin.
  • the number of rotations of the feeder screw 212 was set in advance (condition out) of the molding conditions, and was determined to be the number of rotations at which the resin pellet is starved.
  • a transparent window is provided in the used feeder screw 212, and the condition of the plasticization zone 21 immediately below the resin supply port 201 was visually confirmed through the transparent window to confirm starvation supply.
  • the molten resin was allowed to flow from the plasticization zone 21 to the compression zone 22 by forward rotation of the screw 20 at a back pressure of 6 MPa and a rotation speed of 100 rpm, and was further allowed to flow to the flow velocity adjustment zone 25 and the starvation zone 23.
  • the supply amount of the molten resin to the starvation zone 23 is limited. .
  • the molten resin is compressed in the compression zone 22 to increase the pressure, and the molten resin becomes unfilled (starved) in the downstream starvation zone 23.
  • the molten resin was decompressed and compressed in the flow velocity adjusting zone 25 before flowing to the starvation zone 23 (upstream side) to adjust the flow velocity, and then flowed to the starvation zone 23.
  • the molten resin was sent to the recompression zone 24 to be recompressed, and the molten resin of one shot was weighed at the tip of the plasticizing cylinder 210.
  • white smoke was rising from the degassing acceleration mechanism 300. From this, it was confirmed that the volatile component was separated from the molten resin and the volatile component was discharged from the vent 202 via the degassing acceleration mechanism 300. In this example, the vent up was suppressed, and the molten resin did not completely block the vent 202.
  • the molten resin was injected and filled in the cavity 253 to form a flat plate-shaped compact.
  • the mold temperature was 150 ° C. After molding, the molding was allowed to cool, and then the molding was taken out of the mold. The cooling time was 10 seconds.
  • the injection molding of the molded body described above was continuously performed 1000 shots to obtain 1000 molded bodies. Visual observation was performed on the 10th shot and the 1000th shot. There was no difference in the surface condition of the two molded bodies. There was no fog on the surface of the molded body in either case, and the surface properties were good.
  • the surface roughness (Ra) of the 10th shot and the 1000th shot was measured using a laser microscope (manufactured by Keyence). As a result, the surface roughness (Ra) of both molded products was as small as 3 to 5 ⁇ m, and the molded product surface was smooth.
  • the degassing acceleration mechanism 300 was observed.
  • the resin deposited near the first straight portion 31 in the lower part of the deaeration promoting mechanism 300 was slight, and could be completely removed with tweezers. That is, no resin adhered to the inner wall of the deaeration promoting mechanism 300 was found.
  • the resin taken out from the vent 202 was solidified at a portion in contact with the inner wall surface, but was not solidified at a portion separated from the inner wall surface. As a result, it was confirmed that although the staying resin was present in the first straight portion 31, it was possible to discharge the volatile component from the starvation zone 23.
  • Example 2 a molded body was manufactured by the same method as that of Example 1, except that the screw 20a shown in FIG. 4A was used instead of the screw 20 shown in FIG.
  • the screw 20a has two pressure reducing parts 20C and two compression parts 20D.
  • the pressure reduction and compression of the molten resin were performed twice in the flow velocity adjustment zone 25.
  • the length of the flow velocity adjustment zone 25 in the flow direction of the molten resin was 88 mm. Therefore, the length of the flow velocity adjustment zone 25 was four times the inner diameter (22 mm) of the plasticizing cylinder 210.
  • Injection molding of the molded body was continuously performed for 1000 shots to obtain 1000 molded bodies.
  • white smoke was rising from the degassing acceleration mechanism 300. From this, it was confirmed that the volatile component was separated from the molten resin and the volatile component was discharged from the vent 202 via the degassing acceleration mechanism 300. Also in this example, as in Example 1, the vent up was suppressed and the vent 202 was not completely blocked by the molten resin.
  • thermoplastic resin non-pre-dried non-reinforced polyamide 6 (PA 6) (Gramide T-802, manufactured by Toyobo Co., Ltd.) was used as the thermoplastic resin.
  • the used thermoplastic resin (resin pellet) is left for one week after opening and absorbs water.
  • a screw 20a shown in FIG. 4 (a) was used as a plasticizing screw.
  • a molded product was manufactured in the same manner as in Example 1 except for the above. However, as the thermoplastic resin was changed from PPS-containing polymer alloy to PA6, the molding conditions were as follows. Temperature of each zone in the plasticizing cylinder 210: 210-230 ° C., mold temperature: 60 ° C.
  • Injection molding of the molded body was continuously performed for 1000 shots to obtain 1000 molded bodies.
  • white smoke was rising from the degassing acceleration mechanism 300. From this, it was confirmed that the volatile component was separated from the molten resin and the volatile component was discharged from the vent 202 via the degassing acceleration mechanism 300. Also in this example, as in Example 1, the vent up was suppressed and the vent 202 was not completely blocked by the molten resin.
  • Comparative Example 1 In the present comparative example, a molded body was manufactured in the same manner as in Example 1 except that a screw 90a shown in FIG. 6 was used in place of the screw 20 shown in FIG. That is, in the present comparative example, a molded body was manufactured using a plasticizing cylinder having no flow velocity adjustment zone 25.
  • Comparative Example 2 In this comparative example, the non-reinforcing polyamide 6 which was not predried as in Example 3 was used as the thermoplastic resin. Further, similarly to Comparative Example 1, the degassing acceleration mechanism 300 was not provided to the vent 202, using the screw 90a shown in FIG. A molded product was manufactured in the same manner as in Example 1 except for the above. That is, in the present comparative example, a molded body was manufactured in the same manner as in Example 3 except that a plasticizing cylinder not having the flow velocity adjusting zone 25 and the deaeration promoting mechanism 300 was used.
  • the surface roughness (Ra) of the molded article at the 10th shot was measured in the same manner as in Example 1.
  • the surface roughness (Ra) of the molded product was as large as about 80 ⁇ m, and the smoothness of the surface of the molded product was low. From this result, in this comparative example, removal of the volatile component from the molten resin, in particular, removal of water is not sufficient. Therefore, it is presumed that silver streaks appear and the smoothness of the surface of the molded article is also reduced.
  • Comparative Example 3 In this comparative example, the non-reinforcing polyamide 6 which was not predried as in Example 3 was used as the thermoplastic resin. Further, in the same manner as Comparative Example 1, a screw 90a shown in FIG. 6 was used. A molded product was manufactured in the same manner as in Example 1 except for the above. That is, in the present comparative example, a molded body was manufactured in the same manner as in Example 3 except that a plasticizing cylinder not having the flow velocity adjusting zone 25 was used. Moreover, the manufacturing apparatus used by this comparative example is the same as the manufacturing apparatus used by the comparative example 2 except having the degassing acceleration
  • the surface roughness (Ra) of the molded article at the 10th shot was measured in the same manner as in Example 1.
  • the surface roughness (Ra) of the molded product was as large as about 50 ⁇ m, and the smoothness of the surface of the molded product was low. From this result, in this comparative example, removal of the volatile component from the molten resin, in particular, removal of water is not sufficient. Therefore, it is presumed that silver streaks appear and the smoothness of the surface of the molded article is also reduced.
  • the number of shots which can be continuously molded without venting is larger than that of comparative example 2 (comparative example 3: 300 shots, this comparative example: 700 shots), and the smoothness of the molded body is somewhat It was high (Ra of Comparative Example 3: 80 ⁇ m, Ra of this Comparative Example: 50 ⁇ m). From this, it is inferred that the deaeration promoting mechanism 300 used in the present comparative example has a vent up suppressing effect and an emission promoting effect of volatile components.
  • the manufacturing method of this invention can suppress the vent up during shaping

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

Abstract

L'invention concerne un procédé de fabrication de corps moulé utilisant une machine de moulage de type à évent grâce à laquelle on fabrique un corps moulé présentant d'excellentes propriétés superficielles, tout en supprimant la volatilisation par l'évent pendant le moulage. Le procédé de fabrication d'un corps moulé selon l'invention utilise un cylindre de plastification comportant, dans cet ordre à partir du côté amont, une zone de plastification, une zone de réglage de débit et une zone de privation, un évent étant prévu dans la zone de privation et comprenant : la plastification et la fusion d'une résine thermoplastique en résine fondue dans la zone de plastification ; le réglage du débit de la résine fondue dans la zone de réglage de débit ; la conduite de la résine fondue dans un état de privation dans la zone de privation ; la séparation d'un composant volatil d'avec la résine fondue et l'évacuation du composant volatil de l'évent ; et le moulage de la résine fondue, dont le composant volatil est séparé, en un corps moulé.
PCT/JP2018/025532 2017-07-07 2018-07-05 Procédé et appareil de fabrication d'un corps moulé WO2019009362A1 (fr)

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Cited By (1)

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CN115091713A (zh) * 2022-08-29 2022-09-23 南通金丝楠膜材料有限公司 一种基于机器学习的注塑件银丝附着异常检测方法

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JP2008132703A (ja) * 2006-11-29 2008-06-12 Hoshi Plastic:Kk 樹脂押出機用スクリュー、樹脂押出機、およびペレット製造方法
JP2012503053A (ja) * 2008-09-19 2012-02-02 ランクセス・インターナショナル・ソシエテ・アノニム 水および溶媒を含まないポリマーの製造方法
WO2012120637A1 (fr) * 2011-03-08 2012-09-13 日立マクセル株式会社 Dispositif de malaxage, et procédé de production de corps moulé en résine thermoplastique
JP2015051601A (ja) * 2013-09-09 2015-03-19 日立マクセル株式会社 サンドイッチ成形方法及び成形装置
JP2015168079A (ja) * 2014-03-05 2015-09-28 株式会社日本製鋼所 射出成形機のスクリュおよび射出成形機

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JPS5838135A (ja) * 1981-09-01 1983-03-05 Ube Ind Ltd ベント式成形機用スクリユ
JP2008132703A (ja) * 2006-11-29 2008-06-12 Hoshi Plastic:Kk 樹脂押出機用スクリュー、樹脂押出機、およびペレット製造方法
JP2012503053A (ja) * 2008-09-19 2012-02-02 ランクセス・インターナショナル・ソシエテ・アノニム 水および溶媒を含まないポリマーの製造方法
WO2012120637A1 (fr) * 2011-03-08 2012-09-13 日立マクセル株式会社 Dispositif de malaxage, et procédé de production de corps moulé en résine thermoplastique
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JP2015168079A (ja) * 2014-03-05 2015-09-28 株式会社日本製鋼所 射出成形機のスクリュおよび射出成形機

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