WO2016147896A1 - Machine de moulage de mousse par injection - Google Patents

Machine de moulage de mousse par injection Download PDF

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Publication number
WO2016147896A1
WO2016147896A1 PCT/JP2016/056662 JP2016056662W WO2016147896A1 WO 2016147896 A1 WO2016147896 A1 WO 2016147896A1 JP 2016056662 W JP2016056662 W JP 2016056662W WO 2016147896 A1 WO2016147896 A1 WO 2016147896A1
Authority
WO
WIPO (PCT)
Prior art keywords
cavity
foaming agent
physical foaming
mold
molding machine
Prior art date
Application number
PCT/JP2016/056662
Other languages
English (en)
Japanese (ja)
Inventor
井上　玲
靖丈 澤田
Original Assignee
東洋機械金属株式会社
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 東洋機械金属株式会社 filed Critical 東洋機械金属株式会社
Priority to CN201680015838.5A priority Critical patent/CN107428047B/zh
Publication of WO2016147896A1 publication Critical patent/WO2016147896A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • 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
    • 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
    • B29C45/26—Moulds

Definitions

  • the present invention relates to an injection foam molding machine, and more particularly, to a configuration of a mold apparatus capable of molding a foamed product by injecting a physical foam into a molten resin injected and filled into a cavity from an injection unit.
  • carbon dioxide and nitrogen in a supercritical state are injected into a molten resin stored in a heating cylinder, and the molten resin is injected into the molten resin.
  • a mixture in which the physical foaming agent is uniformly dissolved is produced, and the obtained mixture is injected and filled into a cavity of a mold apparatus to form a resin molded body containing fine bubbles (in this specification, this resin molding).
  • a method for producing a body called “foamed molded product”.
  • This forming method is called a MuCell (registered trademark) process (for example, refer to the abstract of Patent Document 1).
  • MuCell process it is possible to reduce the weight of the resin molded product, improve the dimensional stability, prevent warpage and sink marks, etc., compared to the case of using a general injection molding method.
  • the applicant of the present application has previously incorporated a sleeve made of a porous material in a heating cylinder head as an injection unit of an injection foam molding machine, and physically passes the sleeve through molten resin flowing in a resin passage formed in the sleeve.
  • pours a foaming agent was proposed (for example, refer the summary of patent document 2).
  • the contact area between the molten resin and the physical foaming agent can be increased as compared with the case where the physical foaming agent is injected into the molten resin through the physical foaming agent injection hole provided in the heating cylinder.
  • the diffusion rate of the physical foaming agent into the molten resin can be increased, the molding shot cycle can be shortened, and the productivity of the foam molded product can be increased.
  • Patent Document 1 since the injection foam molding machine described in Patent Document 1 is configured to inject a physical foaming agent into the heating cylinder, the length of the heating cylinder and the screw is necessarily provided in a general injection molding machine. Be bigger than things. For this reason, an existing general injection molding machine cannot be remodeled into an injection foam molding machine, and an expensive dedicated machine is required for manufacturing foam molded products.
  • the present invention has been made to solve such problems of the prior art, and an object of the present invention is to provide an injection foam molding machine capable of producing a foam molded article with good appearance quality at low cost. .
  • the present invention injects and fills a mold opening / closing / clamping unit for opening / closing and clamping a mold apparatus, and a fixed amount of molten resin in a cavity of the mold apparatus clamped.
  • a mold opening / closing / clamping unit for opening / closing and clamping a mold apparatus
  • a fixed amount of molten resin in a cavity of the mold apparatus clamped In an injection foam molding machine comprising an injection unit and a physical foaming agent supply device for supplying a physical foaming agent into a molten resin, the physical foaming agent supplied from the physical foaming agent supply device is supplied to the mold device.
  • a vacuum device is provided that decompresses the inside of the cavity and foams the physical foaming agent in the molten resin after completion.
  • the molten resin supplied from the injection unit and the physical foaming agent supplied from the physical foaming agent supply device are mixed in the cavity of the mold apparatus, the molten resin generated in the injection unit and the physical The flow of the mixture does not occur in the cavity as in the case of injecting and filling the foaming agent mixture into the cavity. For this reason, generation
  • the die unit is equipped with a decompression device, after injecting the physical foaming agent into the cavity filled with the molten resin, the decompression device is operated to decompress the cavity, so that many Bubbles can be generated.
  • the physical foaming agent is supplied into the cavity of the mold apparatus, it is possible to divert the heating cylinder and screw provided in the existing general injection molding machine as it is, and the injection foam molding machine can be made inexpensive. Can be manufactured.
  • the present invention is the injection foam molding machine having the above-described configuration, wherein all or part of the surface constituting the cavity is constituted by a porous body having an area larger than the cross-sectional area of the physical foaming agent introduction path, The tip of the physical foaming agent introduction path is communicated with a part of fine pores of the porous body.
  • the physical foaming agent introduced into the physical foaming agent introduction path from the physical foaming agent supply device can be introduced into the fine pores of the porous body.
  • the physical foaming agent introduced into the fine pores of the porous body is expanded in the surface direction of the porous body through the pores and supplied into the cavity. Therefore, compared with the case where the physical foaming agent is supplied directly into the cavity from the physical foaming agent introduction path, the contact area of the physical foam with the molten resin can be expanded, and the physical foaming agent can be diffused into the molten resin. Since it can be made uniform and quick, the shot cycle of molding can be shortened, and the productivity of the foam molded product can be improved.
  • the decompression device is attached to the mold device so as to be able to move forward and backward, and a core member disposed so that one end can be moved in and out of the cavity;
  • the core member which comprises the core drive mechanism which drives the said core member forward and backward with respect to the said cavity is characterized by the above-mentioned.
  • the pressure in the cavity can be reduced by retracting the core member that has been projected into the cavity during injection / filling of the molten resin after supplying the physical foaming agent, so that the physical foaming agent can be foamed. it can.
  • the present invention is the injection foam molding machine having the above-described configuration, characterized in that the pressure reducing device includes a pressure reducing pipe having one end communicating with the cavity and a pressure reducing valve for opening and closing the pressure reducing pipe. To do.
  • the pressure in the cavity can be reduced by closing the pressure reducing pipe with the pressure reducing valve when the molten resin is injected and filled, and opening the pressure reducing pipe with the pressure reducing valve after supplying the physical foaming agent. Can be foamed.
  • the pressure reducing device may include the mold opening / closing / clamping unit and a controller for controlling the driving of the mold opening / closing / mold clamping unit.
  • the mold apparatus is clamped with a predetermined clamping force at the time of injection and filling of the molten resin, and the mold is injected after the injection and filling of the molten resin into the cavity and the supply of the physical foaming agent are completed. Since the pressure in the cavity can be reduced by reducing the mold clamping force of the apparatus, the physical foaming agent can be foamed.
  • the present invention is characterized in that in the injection foam molding machine configured as described above, the porous body is formed of a porous sintered metal material having a porosity of 5% to 60%.
  • the porosity of the porous body is closely related not only to the permeation performance of the physical foaming agent but also to the strength of the porous body.
  • the porosity of the porous body is 5% or less, the molten resin
  • the physical foaming agent is not supplied quickly and sufficiently and exceeds 60%, insufficient strength of the porous material becomes a problem. Therefore, by forming with a porous sintered metal material having a porosity of 5% to 60%, the permeation performance of the physical foaming agent and the mechanical strength of the porous body can be balanced. Further, since the porous sintered metal material has high strength, it does not adversely affect the life of the mold apparatus.
  • the injection foam molding machine of the present invention mixes the molten resin supplied from the injection unit and the physical foaming agent supplied from the physical foaming agent supply device in the cavity of the mold device, the foamed molded product has high appearance quality. Can be molded.
  • the injection foam molding machine of this example includes a frame 1, a mold opening / closing / mold clamping unit 2 and an injection unit 3 mounted on the frame 1, and a mold opening / closing / mold clamping unit 2. And a physical foaming agent for supplying a physical foaming agent into a cavity 6 formed between the fixed mold 4 and the movable mold 5 which are clamped.
  • a supply device 7; a decompression device 8 for reducing the pressure in the cavity 6; and a controller 9 for controlling the driving of the mold opening / closing and clamping unit 2, the injection unit 3, the physical foaming agent supply device 7 and the decompression device 8. Have.
  • the frame 1 is formed in a box shape using a steel plate and a plate material (not shown), and a controller 9, a power supply device (not shown), piping, wiring, and the like are accommodated therein.
  • the mold opening / closing / clamping unit 2 is arranged opposite to each other with a predetermined interval, and is fixed between the tail stock 21 and the fixed die plate 22 fixed on the frame 1, and between the tail stock 21 and the fixed die plate 22.
  • a movable die plate 23 slidably mounted on the frame 1, a toggle link mechanism 24 having both ends connected to the tail stock 21 and the movable die plate 23, and an electric servo motor for mold opening / closing and clamping 25, and a ball screw mechanism 26 that converts the rotational force of the mold opening / closing / clamping electric servomotor 25 into the driving force of the toggle link mechanism 24.
  • a fixed die 4 is mounted on the fixed die plate 22, and a movable die 5 is mounted on the movable die plate 23. Note that an unillustrated ejecting device for taking out a molded product from the mold apparatus is provided in the vicinity of the mold apparatus including the fixed mold 4 and the movable mold 5.
  • the injection unit 3 includes a heating cylinder 32 having an injection nozzle 31 attached to the tip thereof, a screw 33 housed in the heating cylinder 32 so as to be rotatable and capable of moving forward and backward, and a screw that rotationally drives the screw 33 and drives it forward and backward.
  • the injection nozzle 31 is pressed against the fixed mold 4 during continuous operation.
  • the raw material resin in the hopper 35 is introduced into the heating cylinder 32 accordingly.
  • the raw material resin introduced into the heating cylinder 32 is melted by frictional heat and shearing heat generated by the rotational drive of the screw 33 and heat generated by the band heater 37 and is stored in the tip portion of the heating cylinder 32 sequentially.
  • a predetermined amount of molten resin stored at the tip of the heating cylinder 32 is injected and filled into the cavity 6 by driving the screw 33 forward.
  • the physical foaming agent supply device 7 includes a gas cylinder 71 for storing a source gas such as CO 2 gas and N 2 gas, and a source gas supplied from the gas cylinder 71 at a high temperature and a high pressure to achieve physical properties in a supercritical state.
  • a supercritical fluid generator 72 as a foaming agent
  • a physical foaming agent supply nozzle 73 that injects a physical foaming agent supplied from the supercritical fluid generator 72 into the cavity 6, a supercritical fluid generator 72, and a physical foaming agent. It comprises an on-off valve 75 provided in a pipe line 74 connecting the supply nozzle 73.
  • the physical foaming agent supply nozzle 73 is attached to a mold apparatus including the fixed mold 4 and the movable mold 5.
  • only one physical foaming agent supply nozzle 73 is attached to the mold apparatus, but a plurality of physical foaming agent supply nozzles 73 may be attached to the mold apparatus.
  • the on-off valve 75 is opened and closed once every time molten resin is injected into the cavity 6, and supplies a predetermined amount of physical foaming agent into the cavity 6 through the physical foaming agent supply nozzle 73.
  • the controller 9 drives and stops the mold opening / closing / clamping electric servo motor 25 provided in the mold opening / closing / mold clamping unit 2, drives / stops the screw drive unit 34 provided in the injection unit 3, and the physical foaming agent supply device 7.
  • the control and control of the supercritical fluid generator 72 and the on-off valve 75 and the decompression device 8 and the ejector (not shown) are controlled continuously and automatically. Molding.
  • the fixed mold 4 and the movable mold 5 have at least a surface constituting the cavity 6 (in this specification, this surface is referred to as a “cavity surface”).
  • a part is composed of the porous body 10.
  • the porous body 10 is formed only on the fixed mold 4, but the porous body 10 may be formed on both the fixed mold 4 and the movable mold 5.
  • the porous body 10 on the fixed mold 4 side and the porous body 10 on the movable mold 5 side are mutually connected during mold clamping.
  • Each porous body 10 can be formed in the position which contacts.
  • the configuration of the mold apparatus can be simplified.
  • the formation area of the porous body 10 is set such that a predetermined amount of physical foam can be diffused into the molten resin in the cavity 6 within a predetermined time.
  • the porous body 10 can be formed by performing laser processing on required portions of the fixed mold 4 and the movable mold 5. That is, when an aggregate of metal powders (including alloy powders) is irradiated with a predetermined level of laser, the individual metal powders are locally melted by the heat and become porous sintered metals after solidification. The metal powder is dispersed in the required portions of the fixed mold 4 and the movable mold 5 processed into the shape of the above, and the dispersed metal powder is irradiated with a laser to thereby obtain the fixed mold 4 and the movable mold.
  • the porous body 10 can be formed on the surface of 5.
  • the dispersion of the metal powder and the laser irradiation are repeated as many times as necessary until the thickness of the porous body 10 reaches a required size.
  • the porosity of the porous body 10 can be adjusted by changing the laser power.
  • the porosity of the porous body 10 is adjusted to 5% to 60% in order to balance the physical foaming agent permeability and the mechanical strength of the porous body 10. That is, when the porosity is 5% or less, the mechanical strength of the porous body 10 can be increased, but it becomes difficult to quickly and sufficiently supply the physical foaming agent into the cavity 6. On the other hand, when the porosity exceeds 60%, the physical foaming agent can be easily supplied into the cavity 6, but the mechanical strength of the porous body 10 tends to be insufficient. For this reason, the porosity of the porous body 10 is adjusted to 5% to 60%.
  • a physical foaming agent introduction path 41 one end of which reaches the porous body 10, is formed.
  • an attachment port 42 of the physical foaming agent supply nozzle 73 is formed. It is formed.
  • a sprue 43 that guides the molten resin injected from the injection unit 3 into the cavity 6 is opened in the other part of the fixed mold 4.
  • the movable mold 5 is provided with an installation hole 51 for the core member 81 constituting the decompression device 8. Since the mold apparatus is configured as described above, the molten resin injected from the injection unit 3 is injected and filled into the cavity 6 through the sprue 43.
  • the opening / closing valve 75 of the physical foaming agent supply device 7 is opened with the physical foaming agent supply nozzle 73 attached to the attachment port 42, the physical foam (supercritical fluid) generated by the supercritical fluid generation device 72. Reaches the porous body 10 through the physical foaming agent introduction path 41.
  • the physical foam that has reached the porous body 10 extends in the surface direction of the porous body 10 through the fine pores of the porous body 10 and is supplied into the cavity 6.
  • the decompression device 8 includes a core member 81 installed in the installation hole 51 so as to be capable of moving forward and backward, and a core drive mechanism 82 for driving the core member 81 forward and backward.
  • a core drive mechanism 82 for driving the core member 81 forward and backward.
  • an electric mechanism such as a solenoid or a hydraulic mechanism such as a hydraulic cylinder can be used.
  • the core member 81 protrudes into the cavity 6 until the molten resin is injected and filled into the cavity 6 and the physical foaming agent is supplied into the cavity 6 as shown in FIG.
  • the tip end surface is retracted to a position flush with the cavity surface. Thereby, the inside of the cavity 6 is decompressed, and the physical foaming agent supplied into the molten resin is foamed.
  • the toggle link mechanism 24 is contracted, the movable mold 5 is in a predetermined retracted position, and the fixed mold 4 and the movable mold 5 are The mold is open. Further, the supercritical fluid generating device 72 generates a physical foaming agent before an automatic operation is instructed by an operator. Further, the core member 81 protrudes into the cavity 6.
  • the controller 9 drives the mold opening / closing / clamping electric servomotor 25 to rotate in a predetermined direction to extend the toggle link mechanism 24, thereby moving the movable mold 5.
  • step S1 the controller 9 drives the mold opening / closing / clamping electric servomotor 25 to rotate in a predetermined direction to extend the toggle link mechanism 24, thereby moving the movable mold 5.
  • step S1 the controller 9 drives the mold opening / closing / clamping electric servomotor 25 to rotate in a predetermined direction to extend the toggle link mechanism 24, thereby moving the movable mold 5.
  • Step S2 After the mold clamping, the screw 33 is driven forward by the screw driving unit 34, and a certain amount of molten resin stored in the heating cylinder 32 is injected and filled into the cavity 6 through the injection nozzle 31 and the sprue 43 ( Step S2). After the injection and filling of the molten resin, the opening / closing valve 75 is opened, and the physical foaming agent generated by the supercritical fluid generator 72 is supplied to the pipe 74, the physical foaming agent supply nozzle 73, the physical foaming agent introduction passage 41 and the porous The material 10 is supplied into the cavity 6 through the material 10 (step S3).
  • step S4 the core member 81 is driven backward by the core driving mechanism 82, and the inside of the cavity 6 is decompressed (step S4).
  • the core of the physical foaming agent dispersed in the molten resin grows into bubbles and foams the molten resin, so that a foam molded product having a predetermined shape is formed (step S5).
  • the mold opening / closing / clamping electric servomotor 25 is driven in reverse to contract the toggle link mechanism 24 and return the movable mold 5 to a predetermined retracted position (step S6).
  • the fixed mold 4 and the movable mold 5 are in the mold open state, and therefore an ejecting device (not shown) is driven to take out the foam molded product from the movable mold 5 (step S7).
  • the above operation is continued until a preset number of shots is reached.
  • the injection foam molding machine generates a mixture of a molten resin and a physical foaming agent in the cavity 6, so that no flow of the mixture occurs in the cavity 6, and a swirl mark or an elliptical burst mark is generated. Can be prevented, and the appearance quality of the foam molded product can be improved. Further, since the physical foaming agent is supplied into the cavity 6, the heating cylinder and screw provided in the existing general injection molding machine can be used as they are, and the injection foam molding machine can be manufactured at low cost.
  • the pressure reducing device 8 includes the core member 81 and the core drive mechanism 82 that drives the core member 81 forward and backward.
  • a pressure reducing device having another configuration may be used.
  • a decompression pipe 83 having one end communicating with the cavity 6 and the other end opened to the atmosphere, and a decompression valve 84 for opening and closing the decompression pipe 83.
  • the pressure reducing valve 84 is closed until the supply of the physical foaming agent into the cavity 6 is completed (step S3 in FIG. 3), and is opened at a predetermined timing after the supply of the physical foaming agent into the cavity 6 is completed. Manipulate. Thereby, the physical foaming agent dispersed in the molten resin is foamed.
  • the mold opening / closing / clamping unit 2 and the controller 9 may be used.
  • the process proceeds to step S14, and the mold opening / closing / clamping electric servomotor 25 is moved in the mold opening direction. Is driven by a predetermined rotation amount.
  • steps S11 to S13 and steps S15 to S17 in FIG. 5 correspond to steps S1 to S3 and steps S5 to S7 in FIG. Description of these steps will be omitted to avoid duplication.
  • the present invention can be used in an injection foam molding machine applied to manufacture of a foam molded product.
  • SYMBOLS 1 Frame, 2 ... Mold opening / closing and clamping unit, 3 ... Injection unit, 4 ... Fixed mold, 5 ... Movable mold, 6 ... Cavity, 7 ... Physical foaming agent supply device, 8 ... Decompression device, 9 ... Controller DESCRIPTION OF SYMBOLS 10 ... Porous body, 21 ... Tail stock, 22 ... Fixed die plate, 23 ... Movable die plate, 24 ... Toggle link mechanism, 25 ... Electric servomotor for mold opening / closing and clamping, 26 ... Ball screw mechanism, 31 ... Injection nozzle, 32 ... heating cylinder, 33 ... screw, 34 ... screw drive, 35 ... hopper, 36 ... hopper block, 37 ...

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Molding Of Porous Articles (AREA)

Abstract

Cette invention concerne une machine de moulage de mousse par injection, permettant de fabriquer de manière peu coûteuse des articles moulés en mousse présentant un aspect de bonne qualité. Au moins une partie d'une surface constituant une cavité (6) est configurée à partir d'un corps poreux (10). Un passage d'introduction d'agent moussant physique (41) en communication avec la cavité (6) par l'intermédiaire de vides minuscules du corps poreux (10) est formé dans un bloc fixe (4) ou un bloc mobile (5), et un élément de noyau (81) disposé de telle sorte qu'une extrémité de celui-ci puisse entrer et de sortir de la cavité (6). De la résine fondue provenant d'une unité d'injection (3) est injectée/chargée dans la cavité (6) et un agent moussant physique provenant d'un dispositif d'alimentation en agent moussant physique (7) est ensuite acheminée dans celle-ci, après quoi l'élément de noyau (81) est entraîné vers l'arrière par un mécanisme d'entraînement de noyau (82) et la pression dans la cavité (6) est réduite. L'agent moussant physique est ainsi dilaté, et un article moulé en mousse ayant une forme prédéterminée est moulé.
PCT/JP2016/056662 2015-03-18 2016-03-03 Machine de moulage de mousse par injection WO2016147896A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201680015838.5A CN107428047B (zh) 2015-03-18 2016-03-03 射出发泡成型机

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015-055244 2015-03-18
JP2015055244A JP2016175204A (ja) 2015-03-18 2015-03-18 射出発泡成形機

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WO2016147896A1 true WO2016147896A1 (fr) 2016-09-22

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CN (1) CN107428047B (fr)
WO (1) WO2016147896A1 (fr)

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Publication number Priority date Publication date Assignee Title
TWI697395B (zh) * 2017-05-23 2020-07-01 歐特捷實業股份有限公司 發泡高分子物之模製加工系統
JP6994394B2 (ja) * 2018-01-26 2022-01-14 東洋機械金属株式会社 発泡成形用金型および射出成形システム
CN114889034A (zh) * 2022-05-09 2022-08-12 东莞兆阳兴业塑胶制品有限公司 一种超临界发泡用的鞋模

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JPS4975671A (fr) * 1972-11-24 1974-07-22
JPH10156856A (ja) * 1996-11-29 1998-06-16 Beishin Kogyo Kk 合成樹脂成形品の成形方法
JP2003276045A (ja) * 2002-03-25 2003-09-30 Inoac Corp 樹脂発泡成形品の成形方法
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JP2010208202A (ja) * 2009-03-11 2010-09-24 Sekisui Chem Co Ltd 発泡体の製造方法及び製造装置
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JP5605807B2 (ja) * 2010-08-05 2014-10-15 積水テクノ成型株式会社 発泡樹脂成形体の成形装置
JP2012081713A (ja) * 2010-10-14 2012-04-26 Suzuki Motor Corp 発泡成形用金型
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Publication number Priority date Publication date Assignee Title
JPS4975671A (fr) * 1972-11-24 1974-07-22
JPH10156856A (ja) * 1996-11-29 1998-06-16 Beishin Kogyo Kk 合成樹脂成形品の成形方法
JP2003276045A (ja) * 2002-03-25 2003-09-30 Inoac Corp 樹脂発泡成形品の成形方法
JP2005238726A (ja) * 2004-02-27 2005-09-08 Toyota Boshoku Corp 射出発泡成形方法とそれに用いる成形型
JP2010208202A (ja) * 2009-03-11 2010-09-24 Sekisui Chem Co Ltd 発泡体の製造方法及び製造装置
JP2011046011A (ja) * 2009-08-25 2011-03-10 Mazda Motor Corp 表皮付き発泡樹脂成形品の成形方法及び成形装置

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CN107428047B (zh) 2019-12-24
JP2016175204A (ja) 2016-10-06
CN107428047A (zh) 2017-12-01

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