WO2004033184A1 - 成形方法および樹脂成形体 - Google Patents
成形方法および樹脂成形体 Download PDFInfo
- Publication number
- WO2004033184A1 WO2004033184A1 PCT/JP2003/012832 JP0312832W WO2004033184A1 WO 2004033184 A1 WO2004033184 A1 WO 2004033184A1 JP 0312832 W JP0312832 W JP 0312832W WO 2004033184 A1 WO2004033184 A1 WO 2004033184A1
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- WO
- WIPO (PCT)
- Prior art keywords
- resin
- mold
- temperature
- weight
- fibrous filler
- Prior art date
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Classifications
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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
- B29C45/72—Heating or cooling
- B29C45/73—Heating or cooling of the mould
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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
- B29C45/0005—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor using fibre reinforcements
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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
- 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
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/0005—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor characterised by the material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/0005—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor using fibre reinforcements
- B29C2045/0012—Skin layers without fibres or with little fibres
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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
- B29C45/72—Heating or cooling
- B29C45/73—Heating or cooling of the mould
- B29C2045/7356—Heating or cooling of the mould the temperature of the mould being near or higher than the melting temperature or glass transition temperature of the moulding material
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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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/78—Measuring, controlling or regulating
- B29C49/786—Temperature
- B29C2049/7864—Temperature of the mould
- B29C2049/78645—Temperature of the mould characterised by temperature values or ranges
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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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/285—Feeding the extrusion material to the extruder
- B29C48/288—Feeding the extrusion material to the extruder in solid form, e.g. powder or granules
- B29C48/2886—Feeding the extrusion material to the extruder in solid form, e.g. powder or granules of fibrous, filamentary or filling materials, e.g. thin fibrous reinforcements or fillers
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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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
- B29C49/04—Extrusion blow-moulding
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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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/20—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor of articles having inserts or reinforcements ; Handling of inserts or reinforcements
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- 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
- B29K2063/00—Use of EP, i.e. epoxy resins or derivatives thereof, as moulding material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
- B29K2105/12—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of short lengths, e.g. chopped filaments, staple fibres or bristles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
- B29K2105/16—Fillers
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- 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
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0037—Other properties
- B29K2995/0041—Crystalline
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24355—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
Definitions
- the present invention relates to a resin molded article to which a fibrous filler is added and a molding method thereof.
- a resin molded article to which a fibrous filler is added and a molding method thereof.
- it is used in the automotive field and housing equipment field where rigidity and appearance are required.
- the automotive field it is used for instrument panel parts, door parts, body panels, floor rims, side steps, etc.
- housing equipment field it is used for unit bath parts, assembled furniture, doors, soundproof walls for roads and railways. Background art
- Fiber-reinforced resin moldings are lightweight and have high hardness, and are used in various fields such as electrical equipment, automobiles, housing equipment, and medical equipment.
- GFP Glass' Fiber Reinforced Plastics
- a propylene homopolymer, a low-density polyethylene, and a polypropylene composition containing glass fiber or talc as a reinforcing fiber are injection-molded or hollow-molded.
- the above composition is molded at a mold temperature of 100 ° C. or more to produce a resin molded body having high rigidity and uniform thickness.
- One object of the present invention is to provide a method of molding a resin molded article having a good appearance by avoiding exposure of a fibrous filler, and to provide a resin molded article in view of such problems. .
- the method for molding a resin molded article according to the present invention is directed to an injection molding method for producing a resin molded article by injecting a resin composition comprising a fibrous filler (A) and a resin (B) into a mold.
- the resin composition contains the fibrous filler (A) in an amount of 7% by weight or more and less than 30% by weight, and the resin (B) in an amount of more than 70% by weight and 93% by weight or less,
- the resin (B) is a crystalline resin
- the mold temperature is in a temperature range of [Vicat softening point of 120 ° C.] to less than the melting point of the resin (B)
- the molten resin composition Is filled in the mold to perform shaping.
- the resin (B) is an amorphous resin
- the mold temperature is set to the [Vicat softening point—20 ° C.] of the resin (B).
- the resin composition in a molten state is filled in the mold and shaped, and After the implementation, the mold is cooled to a temperature at which a molded product can be taken out (injection molding).
- the fibrous filler (A) for example, glass fiber, carbon fiber, magnesium sulfate fiber, potassium titanate fiber, titanium oxide fiber, magnesium oxysulfate fiber, or organic filler, organic synthetic or natural Adopt fiber etc. it can.
- the fiber diameter of the fibrous filler (A) is preferably 25 m or less.
- a thermoplastic resin is preferable, and either a crystalline resin or an amorphous resin may be used.
- a crystalline resin polyolefin resin, polyester resin syndiotactic polystyrene, or the like can be used.
- the amorphous resin is not particularly limited, and examples thereof include polyvinyl chloride, polycarbonate, acrylic resin, and polystyrene.
- the resin (B) when the resin (B) is a crystalline resin, when the mold temperature is in the temperature range of [Vicat softening point ⁇ 20 ° C.] to less than the melting point of the resin (B), the molten resin composition The material is filled in a mold and shaping is performed.
- the resin (B) when the resin (B) is an amorphous resin, when the mold temperature is in the temperature range of [Vicat softening point _ 20 ° C] to [Vicat softening point + 20 ° C] of the resin (B), The resin composition in a molten state is filled in a mold to perform shaping.
- the fluidity of the resin composition upon contact of the resin composition with the mold, the fluidity of the resin composition is improved, the floating of the fibrous filler is suppressed, and the molding surface of the mold is favorably applied to the resin composition. Can be transcribed.
- the mold temperature is lower than the [Vicat softening point-120] of the resin (B)
- the molten resin composition is filled into the mold and the molding is performed. Since the mobility decreases, it is not possible to suppress the lifting of the fibrous filler. That is, when a resin molded body with a shipo is obtained, the molding surface of the mold cannot be accurately transferred to the resin composition, and a shipo as designed cannot be formed.
- a resin molded body having a mirror surface is obtained, high gloss and scratch resistance are deteriorated, and the surface roughness is increased, which is not preferable in appearance.
- the mold temperature is set higher than the melting point of the resin (B) or [Vicat softening point + 20 ° C]
- the molding cycle becomes longer, which is industrially disadvantageous in view of production efficiency and energy efficiency. .
- the resin composition contains a fibrous filler (A) of 7% by weight or more and less than 30% by weight, and a resin (B) of more than 70% by weight and 93% by weight or less.
- A fibrous filler
- B resin
- the appearance of the entire resin molded article can be improved while maintaining the strength of the resin molded article.
- the amount of the fibrous filler (A) is less than 7% by weight, the physical properties of the resin molded body cannot be enhanced.
- the fibrous filler (A) is at least 30% by weight, it is difficult to prevent the fibrous filler (A) from floating. Therefore, according to the present invention, it is possible to manufacture a resin molded article while suppressing the lifting of the fibrous filler (A) while maintaining a desired strength. Then, by suppressing the lifting of the fibrous filler (A), when the molding surface of the mold is subjected to the siphoning process, a grain that is substantially the same as the siphon depth of the molding surface is formed. When the molding surface of the mold is mirror-finished, it is possible to obtain a resin molded product having small surface roughness and good surface gloss.
- the method for molding a resin molded article according to the present invention comprises the steps of: extruding a resin composition comprising a fibrous filler (A) and a resin (B) into a molten parison; holding the parison in a mold;
- the resin composition comprises the fibrous filler (A) in an amount of 7% by weight or more and less than 30% by weight, and the resin (B) 70% by weight
- the mold temperature is less than the [Vicat softening point—20 ° C.] of the resin (B).
- the mold temperature is set to [Vicat softening point of the resin (B)].
- the temperature range of 20 ° (:) to [Vicat softening point + 20 ° C] After the body is blown, shaping is performed, and the shaping is performed, the mold may be cooled to a temperature at which a molded product can be taken out (hollow formation).
- the resin and the resin (B) are as described above.
- the resin is controlled by controlling the mold temperature.
- the flowability of the composition can be improved to improve the mold transfer rate, and at the same time, the lifting of the fibrous filler can be suppressed, and the overall appearance of the resin molded article can be improved.
- the mold temperature is changed to the [crystallization temperature-15] of the resin (B). ° C] to [crystallization temperature + 10 ° C].
- the molded article is likely to warp depending on the orientation state of the reinforcing fibers. For this reason, close attention must be paid to product design, mold design, and molding conditions in the production of resin molded products.
- the mold temperature is in the range of [crystallization temperature-15 ° (:) to [crystallization temperature + 10 ° C] of the resin (B).
- the mold is cooled to a temperature at which the molded product can be taken out, whereby not only crystallization on the surface of the molded resin but also crystallization of the entire molded resin can be comprehensively controlled.
- the mold temperature is kept lower than the [crystallization temperature-15 ° C] of the resin (B) for a predetermined period of time, the crystallization speed of the resin will be high, and sink and warp deformation will be suppressed. Is difficult.
- the mold temperature is held for a predetermined time while the mold temperature is higher than the [crystallization temperature + 10 ° C] of the resin (B), the crystallization speed will be slowed down, and the molding cycle will be lengthened. This is industrially disadvantageous in terms of efficiency. Further, by controlling the crystalline resin and other amorphous resin under different cooling conditions, an appropriate molding cycle can be selected according to the type of the resin, and the productivity can be improved.
- the molding temperature of the resin composition may be in the range of [Vicat softening temperature -1 10 ° C] to [melting point -1 10 ° C] of the resin (B).
- the temperature of the mold is set between [Piccat softening temperature -1 10 ° C] and [Vicat softening temperature + 10] of the resin (B). ° C].
- the resin (B) is a crystalline resin
- the mold temperature is equal to or higher than the melting point of the resin (B)
- the molding cycle becomes longer and the productivity becomes poor.
- the resin (B) when the resin (B) is a crystalline resin, when the mold temperature is in the temperature range of [Vicat softening temperature—10 ° C.] to [melting point—10 ° C.] of the resin (B), By shaping the composition, the molding surface of the mold can be satisfactorily transferred to the resin composition without lowering the productivity. Also, when the resin (B) is an amorphous resin, when the mold temperature is in a temperature range of [Vicat softening temperature _ 10 ° (:) to [Vicat softening temperature + 10 ° (:)] of the resin (B), By performing the shaping of the resin composition, similarly, the molding surface of the mold can be satisfactorily transferred to the resin molded body without lowering the productivity.
- the mold temperature is set to [the crystallization temperature of the resin (B)]. o ° c] to [crystallization temperature].
- the mold temperature is maintained for a predetermined time in the range of [the crystallization temperature-10] to [the crystallization temperature] of the resin (B).
- the productivity can be improved by an appropriate molding cycle, the floating of the fibrous filler (A) can be suppressed, and the appearance and dimensional accuracy of the entire resin molded body such as warpage deformation can be improved.
- the fibrous filler (A) in the resin composition is desirably 10% by weight or more and 25% by weight or less.
- the resin composition contains the fibrous filler (A) in an amount of 10% by weight or more and 25% by weight or less, thereby appropriately improving the physical properties of the resin molded article, and The lifting of the fibrous filler (A) can be reliably suppressed.
- the resin molded article of the present invention is characterized by being manufactured by the above-mentioned molding method of the present invention.
- the same function and effect as those of the above-described molding method can be enjoyed, and the floating of the fibrous filler (A) can be suppressed while maintaining the desired strength. Further, the resin molded body obtained in this manner can be used in the field of automobiles and the field of housing equipment, etc., which require rigidity and appearance.
- the resin molded article of the present invention comprises a resin composition containing a fibrous filler (A) of 7% by weight or more and less than 30% by weight, and a resin (B) of more than 70% by weight and 93% by weight or less.
- the surface roughness may be 5 im or less, and a map of a lmm square rectangular frame reflected on the surface may be formed so as to be distinguishable.
- the fibrous filler (A) is easily exposed on the surface of the resin molded body. Further, even if the fibrous filler (A) is not exposed on the surface of the resin molded body, irregularities on the surface are easily formed.
- the surface of the resin molded product may be rough, or the resin molded product may have poor scratch resistance or high gloss. Often.
- the fibrous filler (A) can be prevented from rising and provide a resin molded article having a good appearance.
- the resin molded article of the present invention comprises a resin composition containing a fibrous filler (A) of 7% by weight or more and less than 30% by weight, and a resin (B) of more than 70% by weight and 93% by weight or less.
- a molded article having sipos on its surface characterized by satisfying one of the following two conditions. (1) When there are spots on the entire surface of the molded product, the mold transfer rate is 90% or more. (2) In the case where a part of the molded product has a spot, the mold transfer rate is 90% or more, and the surface roughness of the part without the spot is 5 m or less.
- the mold transfer rate for example, the ratio (hZH) of the die depth H of the die to the die depth h of the resin molded body formed by the die can be adopted. If the mold transfer rate is less than 90%, the fibrous filler (A) is lifted up, or the transfer of sipo becomes rough, resulting in poor appearance.
- the fibrous filler (A) is more likely to be lifted up, resulting in poor appearance. It tends to have poor definition.
- the molded article satisfies either one of the above (1) and (2), it is possible to provide a resin molded article having a good appearance by suppressing the floating of the fibrous filler (A).
- the resin composition contains the fibrous filler (A) in an amount of 10% by weight or more and 25% by weight or less.
- the resin composition contains the fibrous filler (A) in an amount of 10% by weight or more and 25% by weight or less, the floating of the fibrous filler (A) is easily suppressed. And a resin molded product having a good quality can be provided.
- FIG. 1 is a sectional view showing an injection molding machine used for a molding method according to a first embodiment of the present invention.
- FIG. 2 is a cross-sectional view showing a blow molding machine used in a molding method according to a second embodiment of the present invention.
- FIG. 1 is a sectional view of an injection molding machine 1 used in a molding method according to a first embodiment of the present invention.
- the injection molding machine 1 is a machine for producing a resin molded body having a predetermined shape from a resin composition obtained by mixing a fibrous filler (A) and a thermoplastic resin (B).
- a mold 12 and a mold clamping device 13 are provided.
- the injection device 11 is for plasticizing the injected resin composition and injecting it into the mold 12.
- the injection device 11 is provided with a cylinder 11 having a heater 11 A and a cylinder 11.
- Screw 1 1 2, hopper 1 1 3 that feeds raw material into cylinder 1 1 1, hydraulic device 1 1 4 that rotates screw 1 1 2, nozzle 1 that connects cylinder 1 1 1 and mold 1 2 1 and 5 are provided.
- the resin composition charged from the hopper 1 13 and heated by the cylinder 11 1 A was heated and kneaded by the screw 1 12, plasticized, and moved to the nozzle 1 15 side. It is injected into the mold 12 through the nozzle 115 at high pressure.
- the mold 12 includes a fixed mold 12 A attached to the nozzle 1 15 and a movable mold 12 B that can move forward and backward with respect to the fixed mold 12 A.
- the movable mold 1 2B moves forward and backward by the operation of 3, and the mold 12 performs the opening and closing operation.
- a cavity is formed therein.
- the mold 12 is provided with a temperature control mechanism for adjusting the temperature of the mold 12.
- the mold clamping device 13 maintains the mold 12 closed with a sufficiently large mold clamping force against the opening and closing operation of the mold 12 and the injection pressure of the injection device 11.
- the mold clamping device 13 can be used directly without changing the driving force generated by a driving device such as a hydraulic cylinder.
- the force generated by a direct-pressure type mold clamping device that transmits the contact and transmission to the mold and clamps the mold, and the force generated by a drive device such as a hydraulic cylinder, etc., are increased by the combination of the links to generate a large mold clamp in the mold.
- a toggle-type mold clamping device adapted to be used can be employed.
- the mold clamping device 13 is operated, and the movable mold 12B is moved to perform mold clamping of the mold 12.
- the injection device 11 operates, and the hydraulic device 1 14 starts rotating the screw 1 12.
- the rotation of the screw 1 12 causes the resin molded product fed from the hopper 113 to be sent out from the rear end of the screw to the front end, and is kneaded while being heated by the heater 11 A of the cylinder 111. Is melted.
- the melted resin composition moves to the nozzle side 115, and is injected into the mold 12 while being pressed at a predetermined pressure at the tip of the screw 112.
- the hydraulic device 114 stops rotation of the screw 112 when the pressure of the melted resin composition is sensed by being filled in the mold 12 and shaped.
- the temperature of the mold 12 is determined by the [Vicat softening point Tb- of the thermoplastic resin (B). It is preferable to set the temperature in a range from 20 ° C] to less than the melting point. If the thermoplastic resin (B) is an amorphous resin, set the temperature range of [Vicat softening point Tb-20 ° C] to [Vicat softening point Tb + 2 Ot] of the thermoplastic resin (B). It is preferable to do so.
- thermoplastic resin (B) when the thermoplastic resin (B) is a crystalline resin, the thermoplastic resin (B) is set in a temperature range of [Vicat softening point Tb—10 ° C] to [melting point-1 ° C], and the When the resin (B) is an amorphous resin, it is more preferable to set the temperature in the range of [Vicat softening point Tb-10 ° C] to [Vicat softening point Tb + 10] of the thermoplastic resin (B). .
- the temperature of the mold 12 is adjusted by a temperature control mechanism to cool the molten resin composition.
- the temperature of the mold 12 (the temperature at the time of holding) is, when the thermoplastic resin (B) is a crystalline resin, the [crystallization temperature Tc of 15 ° C] to [ The crystallization temperature is preferably maintained within a range of Tc + 10) for a predetermined time. It is more preferable to maintain the temperature within the range of [crystallization temperature Tc ⁇ 10 ° C.] to [crystallization temperature Tc] for a predetermined time.
- the predetermined time is maintained for 10 to 300 seconds, preferably 30 to 200 seconds.
- the temperature range and holding time are determined by considering the size of the resin molded product, the thickness of the resin molded product, the type of resin, and the presence of additives, etc. Can be determined based on the tolerance of
- the temperature is adjusted by a temperature control mechanism, and the temperature at which the resin molded product can be taken out (the temperature at the time of cooling), for example, glass of thermoplastic resin (B) Cool to below the transition point Tg.
- This cooling rate is in the range commonly used in the injection molding method.
- thermoplastic resin (B) is an amorphous resin, it is cooled to a temperature at which the resin molded body can be taken out without holding for a predetermined time.
- the fibrous filler (A) is, for example, glass fiber, carbon fiber, magnesium sulfate, or the like. Fiber, potassium titanate fiber, titanium oxide fiber, magnesium oxysulfate fiber, or organic filler, organic synthetic or natural fiber can be used. In addition, long fibers, chopped strands and the like can be adopted as the form of the fibers.
- the fiber diameter of the fibrous filler (A) is preferably 25 m or less.
- the thermoplastic resin (B) is, for example, polypropylene, polyethylene, polystyrene, polycarbonate, ABS (acrylonitrile butadiene styrene copolymer), AES (acrylonitrile ethylene propylene rubber styrene copolymer), AS (acrylonitrile styrene copolymer) ), Modified PPE (polyphenylene ether), PPS (polyphenylene sulfide), nylon, SPS (syndiotactic polystyrene), etc., and composite materials using these can be used.
- ABS acrylonitrile butadiene styrene copolymer
- AES acrylonitrile ethylene propylene rubber styrene copolymer
- AS acrylonitrile styrene copolymer
- Modified PPE polyphenylene ether
- PPS polyphenylene sulfide
- nylon SPS (syndi
- the resin composition contains the fibrous filler (A) of 7% by weight or more and less than 30% by weight and the thermoplastic resin (B) of more than 70% by weight and 93% by weight or less. More preferably, the fibrous filler (A) is contained in an amount of 10% by weight or more and 25% by weight or less.
- the temperature of the mold 12 (the temperature at the time of shaping) is controlled by a temperature control mechanism, whereby the thermoplastic resin (B) is crystallized.
- the temperature should be set in the range of [Vicat softening point Tb-20 ° C] to below the melting point of the thermoplastic resin (B).
- the thermoplastic resin (B) is an amorphous resin
- the temperature is set in the range of [Vicat softening point Tb-20 C] to [Vicat softening point Tb + 20 ° C] of the thermoplastic resin (B). I do.
- the fluidity of the resin composition is improved, the floating of the fibrous filler is suppressed, and the molding surface of the mold 12 is formed with the resin composition. Good transfer is possible.
- thermoplastic resin (B) is a crystalline resin
- the temperature is set in the range of [Vicat softening point Tb-10 ° C] to [melting point-10 ° C] of the thermoplastic resin (B).
- the temperature should be set in the range of [Vicat softening point Tb-10 ° C] to [Vicat softening point Tb + 10 ° C] of the thermoplastic resin (B).
- the molding cycle can be shortened, and the molding surface of the mold 12 can be satisfactorily transferred to the resin composition.
- the temperature of the mold 12 (temperature during holding) is controlled by a temperature control mechanism when cooling the shaped resin composition.
- the temperature is set within the range of [the crystallization temperature Tc ⁇ 15 ° C.] to [the crystallization temperature Tc + 10] of the thermoplastic resin (B) and held for a predetermined time.
- thermoplastic resin (B) is maintained for a predetermined time in the range of [crystallization temperature Tc—10 ° C.] to [crystallization temperature Tc], the molding cycle is shortened, and the overall appearance of the resin molded body is reduced. The dimensional accuracy can be improved.
- thermoplastic resin (B) After the resin composition is shaped in the mold 12, when the shaped resin composition is cooled, if the thermoplastic resin (B) is an amorphous resin, the thermoplastic resin (B) should be held for a predetermined time. What Then, it is cooled to a temperature at which the resin molded body can be taken out.
- an appropriate molding cycle can be selected according to the type of the resin, and the productivity can be improved.
- the resin composition is configured to contain the fibrous filler (A) at 7% by weight or more and less than 30% by weight, and the thermoplastic resin (B) at more than 70% by weight and at most 93% by weight. This makes it possible to improve the appearance of the entire resin molded body while maintaining the desired strength. At this time, if the resin composition is configured to contain the fibrous filler (A) in an amount of 10% by weight or more and 25% by weight or less, it is possible to appropriately enhance the physical properties of the resin molded article and to improve the fibrous filling. The lifting of the material (A) can be reliably suppressed.
- the production of the resin molded body is performed by the injection molding method.
- the second embodiment is different in that the production of the resin molded body is performed by a hollow molding method.
- FIG. 2 is a sectional view of a hollow molding machine used in a molding method according to a second embodiment of the present invention.
- the hollow molding machine 2 is a machine for producing a resin molded article having a predetermined shape from a resin composition obtained by mixing a fibrous filler (A) and a thermoplastic resin (B). And a mold 22.
- the hollow molding machine main body 21 melts and kneads the resin composition and extrudes it as a parison P between the molds 22.
- the parison P includes a parison sealing tool 2 12 for sealing the lower end of the P and a gas blowing pipe 2 13 for blowing gas into the parison P.
- the mold 22 is formed to be openable and closable, and holds the parison P extruded by the hollow molding machine main body 21.
- the mold temperature control tube 22 controls the temperature of the mold 22. 1, a cooling jacket 22 for cooling the mold 22, and a gas blowing pipe 22 for blowing gas from the mold 22 to the parison P inside.
- the mold temperature control tube 221 adjusts the temperature of the mold 22 by circulating steam, heating oil, or the like, for example.
- the cooling jacket 22 2 2 has a cooling medium inlet 22 2 A and a cooling medium outlet 22 22 B connected to the outside.
- the cooling medium inlet 22 22 A and the cooling medium outlet 22 22 A cooling medium is introduced from the mold to cool the mold 22.
- the gas injection pipe 22 3 is formed so as to be able to advance and retreat from the inside of the mold 22 to the outside, protrudes into the mold 22, pierces the parison P, and blows gas into the parison P.
- the hollow molding machine 2 is operated, and an extruder (not shown) melt-kneads and extrudes the resin composition. Then, usually, using an accumulator, a cylindrical parison P is extruded from the extrusion die 2 11 between a pair of opened molds 22. Then, the parison sealing tool 2 12 seals the lower end of the extruded parison P.
- Preblow P and parison P is expanded to some extent. Then, mold clamping of the mold 22 is started, and the parison P is clamped.
- the gas injection pipe 2 13 protrudes from the mold surface, pierces the parison wall, and air is blown into the parison P. Then, the parison P expands, and the parison P presses and adheres to the molding surface of the mold 22 to perform shaping.
- the temperature of the mold 22 (the temperature at the time of shaping) is set in the mold temperature control tube 221, and when the thermoplastic resin (B) is a crystalline resin, , Thermoplastic resin (B It is preferable to set the temperature within the range of [Vicat softening point Tb-20 ° (:) to less than the melting point of the thermoplastic resin (B). It is preferable to set the temperature in the range of [Biccat softening point Tb-20 ° C] to [Vicat softening point + 20 ° C] of B.
- thermoplastic resin (B) is a crystalline resin
- the temperature of the thermoplastic resin (B) is set in the range of [Vicat softening point Tb-10 ° C] to [melting point-10 ° C]
- the thermoplastic resin (B) is an amorphous resin
- the molten resin composition in the mold 22 is cooled by the cooling jacket 222.
- the temperature of the mold 22 is the crystallization temperature of the thermoplastic resin (B). It is preferable that the temperature is maintained for a predetermined time in the range of [Tc ⁇ 15 ° C.] to [crystallization temperature Tc + 10], and that the thermoplastic resin (B) has a [crystallization temperature Tc ⁇ 10] to [crystallization temperature Tc]. It is more preferable to hold for a predetermined time within the range.
- the predetermined time is maintained for 10 to 300 seconds, preferably 30 to 200 seconds.
- This temperature range and holding time are determined by considering the size of the resin molded product, the thickness of the resin molded product, the type of resin, the presence or absence of additives, etc. Can be determined based on tolerance.
- the cooling medium is allowed to flow through the cooling jacket 222 while maintaining the heated medium in the mold temperature control tube 221.
- a medium heated to a predetermined temperature in the mold temperature control tube 221 and the cooling jacket 222 is extracted, and a refrigerant near room temperature is introduced into the cooling jacket 222, It is cooled to a temperature at which the resin molded product can be taken out (temperature during cooling), for example, the glass transition point Tg of the thermoplastic resin (B) or lower.
- This cooling rate is in the range commonly used in the blow molding method.
- thermoplastic resin (B) is an amorphous resin
- it is cooled to a temperature at which the resin molded body can be taken out without holding for a predetermined time.
- a resin molded body is manufactured by the hollow molding method.
- the same resin composition as in the first embodiment (fibrous filler (A) and thermoplastic resin (B)) can be used.
- the flow of the resin composition can be controlled by controlling the temperature of the mold 22. This improves the mold transfer rate by improving the moldability, suppresses the floating of the fibrous filler (A), and improves the overall appearance of the resin molded article.
- the thermoplastic resin (B) is a crystalline resin, not only crystallization on the surface of the resin molded product but also crystallization of the entire resin molded product is controlled, so that warpage deformation is eliminated. The dimensional accuracy can be improved.
- Example 1 molding was performed by the hollow molding method based on the second embodiment under the following molding conditions to produce a resin molded body having a general part thickness of 3 mm.
- IHI IPB EPML—90S (Die: 200mm ⁇ i), Akimurai capacity: 13.5 liters, Clamping pressure: 60 ton, Screw diameter: 90mm)
- Mold flat plate [Length: 60 Omm, Width: 400 mm, Thickness: 25 mm, Molding surface: Mirror finish of 0.5 S or less]
- heating is performed by circulating steam in the mold temperature control tube 221. Retention In some cases, water is introduced into the cooling jacket 222 while steam is circulated in the mold temperature control tube 221. During cooling, the steam in the mold temperature control tube 221 is removed, and water is circulated in the cooling jacket 222.
- Resin composition fibrous filler (A): GF chopped strand [fiber diameter: 10 xm, fiber length: 0.5 mmj
- a resin composition obtained by dry-blending the fibrous filler (A) and the thermoplastic resin (B) was molded by the hollow molding method according to the second embodiment.
- Example 2 a resin molded body was manufactured in the same manner as in Example 1 except that the molding conditions (resin composition) in Example 1 were changed as follows.
- Resin composition fibrous filler (A): glass fiber [fiber diameter: 16 im, fiber length: 4 mm]
- Thermoplastic resin (B) Homopolypropylene [Vicat softening point: 1
- Addition amount of fibrous filler (A) 20% by weight (based on 100% by weight of resin composition)
- the glass fiber of the fibrous filler (A) is arranged substantially parallel to the longitudinal direction, and the thermoplastic resin (B) is impregnated into the glass fiber in a pellet-shaped resin composition according to the second embodiment. Molded by a hollow molding method based on
- Example 3 a resin molded body was manufactured by the same method as in Example 2 except that the molding conditions in Example 2 were changed as follows.
- Mold; Molding surface Sipo processing for automotive interior [Example 4]
- Example 4 a resin molded body was molded by the injection molding method based on the first embodiment under the following molding conditions.
- the resin composition and the mold temperature were the same as in Example 2.
- Mold flat plate [Length: 600mm, Width: 400mm, Thickness: 25mm, Molding surface: Mirror finish of 0.5S or less]
- Example 5 a resin molded body was manufactured in the same manner as in Example 2 except that the molding conditions in Example 2 were changed as follows.
- Example 6 a resin molded body was manufactured in the same manner as in Example 2 except that the molding conditions in Example 2 were changed as follows.
- Example 7 a resin molded body was manufactured in the same manner as in Example 1 except that the molding conditions in Example 1 were changed as follows.
- thermoplastic resin (B) impact-resistant polystyrene (HI PS, manufactured by Idemitsu Oil Chemical Co., Ltd., HT 52) That is, unlike the above Examples 1 to 6, using an amorphous thermoplastic resin I have.
- Example 7 the resin composition was shaped in a mold heated to 130 ° C, and after a predetermined time, cooled at 60 ° C. That is, unlike Examples 1 to 6, the step of maintaining the resin composition at a predetermined temperature after shaping is not performed.
- Example 8 a resin molded body was molded in the same manner as in Example 2 except that the molding conditions in Example 2 were changed as follows. Mold temperature; Holding temperature: 100 ° C
- Example 8 the resin composition was shaped in a mold heated to 130 ° C., and after being shaped, held in a mold heated to 100 ° C. After holding for a predetermined time, cooling was started. That is, Embodiment 8 is suitable for the temperature range during shaping ([Vicat softening point — 20 ° C.]) to less than the melting point in Claim 1 of the present invention. Is one of the results obtained by varying the temperature at the time of holding in Examples 2, 5, and 6, and is compared with these examples. However, it does not conform to the temperature range during retention ([crystallization temperature-15 ° C]-[crystallization temperature + 10 ° C]) in claim 3 of the present invention.
- Comparative Example 1 a resin molded body was manufactured in the same manner as in Example 2 except that the molding conditions in Example 2 were changed as follows.
- Comparative Example 1 the resin composition was shaped in a mold heated to 80, and after a predetermined time, cooling was started. That is, unlike Examples 1 to 6, the step of maintaining the crystalline resin composition at a predetermined temperature after shaping is not performed.
- Comparative Example 2 a resin molded body was manufactured by the same method as in Comparative Example 1 except that the molding conditions in Comparative Example 1 were changed as follows.
- Mold Mold; Molding surface: Sipo processing for automotive interior
- Comparative Example 3 a resin molded body was manufactured in the same manner as in Comparative Example 1 except that the molding conditions in Comparative Example 1 were changed as follows.
- Comparative Example 3 the resin composition was shaped in a mold heated to 160 ° C., and after a predetermined time, cooling was started. That is, unlike Examples 1 to 6, the temperature at the time of shaping is out of the specified range (from (Vicat softening point _ 25 ° C) to less than the melting point or out of the range of [Vicat softening point + 25 ° C]), Further, a step of maintaining the crystalline resin composition at a predetermined temperature after shaping is not performed.
- Comparative Example 4 a resin molded body was molded by the same method as in Example 4 except that the molding conditions in Example 4 were changed as follows.
- Comparative Example 4 the resin composition was shaped in a mold heated to 40 ° C., and after a predetermined time, cooling was started. That is, unlike Examples 1 to 6, the temperature at the time of shaping is out of the specified range ([Vicat softening point-25 ° C] to less than the melting point or out of the range of [Vicat softening point + 25 ° C]). Further, a step of maintaining the crystalline resin composition at a predetermined temperature after shaping is not performed.
- Comparative Example 5 a resin molded body was molded by the same method as in Example 7 except that the molding conditions in Example 7 were changed as follows.
- the minute irregularities on the surface of the resin molded product obtained with the mirror-finished mold are measured using a scanning laser microscope (LSM-GM, manufactured by Olympus Optical Co., Ltd.).
- 1 mm grid paper is held over the surface of the resin molded product obtained by using a mirror-finished mold, and it is determined whether or not the grid cells can be clearly discriminated visually from the image reflected on the surface of the resin molded product.
- the height of shipo on the surface of the resin molded product obtained by the die subjected to shipo processing is measured using a scanning laser microscope (LSM-GM, manufactured by Olympus Optical Co., Ltd.).
- LSM-GM scanning laser microscope
- the depth of the die on the surface of the die subjected to the shipo processing is measured in the same manner.
- the surface of the resin molded body The ratio of the height divided by the depth of the die surface is calculated.
- the presence or absence of sink marks on the surface of the resin molded product is visually evaluated. Also, visually evaluate the state of warpage by placing the resin molded body on a horizontal surface.
- Tables 1 and 2 show the molding conditions and evaluation results of Examples 1 to 8 and Comparative Examples 1 to 5 above.
- Example 1 the average surface roughness was 2 zm, the sharpness was good, and the evaluation of sink / warpage was ⁇ .
- the fibrous filler (A) when the average surface roughness of the fiber-reinforced resin molded product exceeds 5 m, the fibrous filler (A) is easily exposed on the surface of the resin molded product. In addition, even if it is not exposed on the surface of the resin molded product, the fibrous filler (A) may cause irregularities on the surface. I'm sorry. In Example 1, it is considered that the lifting of the fibrous filler (A) was suppressed because the average surface roughness was 2.
- the surface of the resin molding is rough.
- the molded article has poor scratch resistance and high gloss. Further, the surface of the resin molded body is distorted.
- the resin molded body has good surface gloss, no distortion of the surface of the resin molded body, and good scratch resistance due to the good clarity. .
- the favorable evaluation of sink marks and warpage confirms that the resin molded body has good appearance and high dimensional accuracy.
- Example 1 even if 30% by weight of the fibrous filler (A) was added, the fibrous filler (A) was prevented from rising, and the appearance was good, and the warpage was deformed. And a resin molded body having excellent dimensional stability was formed.
- the average surface roughness was 3 m
- the sharpness was good
- the evaluation of sink / warpage was ⁇ .
- Example 1 it was possible to form a resin molded article having a good appearance by suppressing the lifting of the fibrous filler (A), and having excellent dimensional stability by reducing warpage deformation. .
- the mold transfer rate was 95%, and the evaluation of sink and warpage was a result of ⁇ .
- the mold transfer rate is less than 90%, the average surface roughness of the resin molded product often exceeds 5 m, that is, the fibrous filler (A) is exposed on the surface of the resin molded product. Often have.
- the mold transfer rate is 95%, the lifting of the fibrous filler (A) is suppressed, and sipos are surely transferred, and the appearance is improved.
- the resin molded body has good appearance and high dimensional accuracy.
- Example 3 similarly to Examples 1 and 2, the appearance of the fibrous filler (A) was suppressed by suppressing the floating of the filler, and the warpage deformation was reduced, and the dimensional stability was excellent.
- a molded resin article was formed.
- the average surface roughness was 2 m, the sharpness was good, and the evaluation of sink / warpage was ⁇ .
- Example 4 similarly to Examples 1 to 3, the appearance of the fibrous filler (A) was suppressed by suppressing the lifting of the fibrous filler (A), and the dimensional stability was reduced by reducing the warpage deformation. Excellent resin moldings could be formed.
- Example 5 the average surface roughness was 4 m, the sharpness was good, and the evaluation of sink / warpage was ⁇ .
- Example 5 similarly to Examples 1 to 4, the appearance of the fibrous filler (A) was suppressed by suppressing the lifting of the fibrous filler (A), and the dimensional stability was reduced by reducing the warpage deformation. Excellent resin moldings could be formed.
- Example 6 as in Example 1 or 4, the average surface roughness was 2 m, the image clarity was good, and the evaluation of sink / warpage was ⁇ .
- Example 6 as in Examples 1 to 5, the appearance of the fibrous filler (A) was suppressed by suppressing the lifting, and the dimensional stability was reduced by reducing the warpage. Excellent resin moldings could be formed.
- Example 7 as in Examples 1, 4 and 6, the average surface roughness was 2 m, the sharpness was good, and the evaluation of sink / warpage was ⁇ .
- Example 6 as in Examples 1 to 5, the appearance of the fibrous filler (A) was suppressed by suppressing the lifting, and the dimensional stability was reduced by reducing the warpage. Excellent resin moldings could be formed.
- the average surface roughness was 1011, the sharpness was poor, and the evaluation of sink / warpage was ⁇ .
- Example 8 the average surface roughness was 5 m or more because the temperature during holding was out of the specified range, but the temperature during shaping was within the specified range. A relatively small average surface roughness of 10 zm was realized as compared with 4. Comparing with Examples 1 to 6, it is understood that it is preferable to carry out the process when the temperature during the holding is in the range of [crystallization temperature-15 ° C] to [crystallization temperature + 10 ° C].
- the average surface roughness was 40 zm, the sharpness was poor, and the evaluation of sink / warpage was ⁇ .
- fibrous filler (A) It is probable that the resin moldings with good appearance could not be obtained because the rise of the resin could not be suppressed.
- the average surface roughness was 50 m, the sharpness was poor, and the evaluation of sink / warp was ⁇ .
- the average surface roughness was 30 ° ⁇ , the sharpness was poor, and the evaluation of sink / warpage was ⁇ .
- the temperature adjusting mechanism, the mold temperature control tube, and the cooling jacket have been described as means for adjusting the temperature of the mold, but are not limited thereto.
- the method of controlling the mold temperature includes a method of circulating a heating medium in the mold, a method of electrically heating such as resistance heating and dielectric heating, and a method of having a heating means in the mold body. Can be adopted. Alternatively, a method of selectively heating the mold surface such as gas flame heating from the mold surface side may be used.
- the cooling method a method of circulating a cooling medium in a mold or the like may be adopted.
- an antioxidant an antistatic agent, an ultraviolet absorber, a light stabilizer, a flame retardant, a flame retardant auxiliary, a pigment, a dispersant, a nucleating agent, and the like are added to the resin composition as necessary. You may.
- the method for forming the resin molded body to which the fibrous filler (A) is added is not limited to the above embodiments.
- vacuum pressure forming or the like may be adopted, that is, any molding method using a mold may be used.
- the present invention can be used for a resin molded article to which a fibrous filler is added and a molding method thereof, and can be used in the field of automobiles and housing equipment requiring rigidity and appearance. Especially in the automotive field, it can be used for instrument panel parts, door parts, body panels, floor rims, side steps, etc. In the housing equipment field, it can be used for unit bath parts, assembled furniture, doors, soundproof walls for roads and railways, etc.
Abstract
Description
Claims
Priority Applications (2)
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US10/530,713 US7638083B2 (en) | 2002-10-08 | 2003-10-07 | Molding method and resin moldings |
EP03751360A EP1555108A4 (en) | 2002-10-08 | 2003-10-07 | MOLDING METHOD AND RESIN MOLDINGS |
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JP2002294699A JP4266609B2 (ja) | 2002-10-08 | 2002-10-08 | 成形方法および樹脂成形体 |
JP2002-294699 | 2002-10-08 |
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US (1) | US7638083B2 (ja) |
EP (1) | EP1555108A4 (ja) |
JP (1) | JP4266609B2 (ja) |
CN (1) | CN100475484C (ja) |
WO (1) | WO2004033184A1 (ja) |
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JP2005067303A (ja) | 2003-08-21 | 2005-03-17 | Idemitsu Kosan Co Ltd | 自動車内装部品 |
JP2006160863A (ja) * | 2004-12-07 | 2006-06-22 | Fuji Photo Film Co Ltd | ドープ製造装置及び製造方法 |
JP4815822B2 (ja) * | 2005-03-03 | 2011-11-16 | 小野産業株式会社 | 複合熱可塑性樹脂めっき成形品の製造方法 |
JP2006316106A (ja) * | 2005-05-10 | 2006-11-24 | Toyota Motor Corp | ポリプロピレン樹脂組成物ならびにそれを用いた射出成形方法及び成形体 |
DE102005053690A1 (de) * | 2005-11-10 | 2007-05-31 | Airbus Deutschland Gmbh | Werkzeug, Anordnung und Verfahren zum Herstellen eines Bauteils, Bauteil |
CN101190552A (zh) * | 2006-11-29 | 2008-06-04 | 深圳富泰宏精密工业有限公司 | 模具结构 |
WO2012043794A1 (ja) * | 2010-09-30 | 2012-04-05 | 旭化成ケミカルズ株式会社 | 射出成形体 |
JP5709076B2 (ja) * | 2010-11-30 | 2015-04-30 | 株式会社アドユニオン研究所 | 成形品の製造方法 |
US8535539B2 (en) | 2011-06-08 | 2013-09-17 | Chandler Systems, Inc. | Water softener system and method |
JP5868738B2 (ja) * | 2012-03-08 | 2016-02-24 | 住友重機械工業株式会社 | 射出成形機 |
JP5997949B2 (ja) * | 2012-06-22 | 2016-09-28 | クミ化成株式会社 | 樹脂の射出成形方法 |
CN102825719A (zh) * | 2012-09-03 | 2012-12-19 | 深圳Tcl新技术有限公司 | 提高注塑件刚性和尺寸稳定性的方法和液晶电视面壳 |
CN104552970B (zh) * | 2013-10-25 | 2018-11-30 | 中国石油化工股份有限公司 | 一种含有超细金属纤维的聚合物复合纤维的制备方法及其制备的聚合物复合纤维 |
JP6766142B2 (ja) * | 2016-05-10 | 2020-10-07 | 株式会社プライムポリマー | 繊維強化ポリプロピレン系樹脂組成物の成形体 |
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2002
- 2002-10-08 JP JP2002294699A patent/JP4266609B2/ja not_active Expired - Fee Related
-
2003
- 2003-10-07 US US10/530,713 patent/US7638083B2/en active Active
- 2003-10-07 EP EP03751360A patent/EP1555108A4/en not_active Withdrawn
- 2003-10-07 CN CNB2003801053824A patent/CN100475484C/zh not_active Expired - Lifetime
- 2003-10-07 WO PCT/JP2003/012832 patent/WO2004033184A1/ja active Application Filing
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JPS54142266A (en) * | 1978-04-28 | 1979-11-06 | Asahi Chem Ind Co Ltd | Molding of synthetic resin article |
JPS55109639A (en) * | 1979-02-15 | 1980-08-23 | Asahi Chem Ind Co Ltd | Method of injection molding |
JPS63317444A (ja) * | 1987-06-19 | 1988-12-26 | Teijin Chem Ltd | 吹込成形品 |
EP0364803A1 (en) * | 1988-10-03 | 1990-04-25 | Idemitsu Petrochemical Co. Ltd. | Injection molded container for food and manufacturing method of the same |
JPH052922U (ja) * | 1991-02-14 | 1993-01-19 | 三菱自動車工業株式会社 | 軸受部材 |
EP0623448A1 (en) * | 1993-05-07 | 1994-11-09 | General Electric Company | Thermoplastic resin molding process |
JPH06328549A (ja) * | 1993-05-21 | 1994-11-29 | Asahi Chem Ind Co Ltd | 新規なる押出ブロー成形法 |
JPH07186175A (ja) * | 1993-12-27 | 1995-07-25 | Asahi Chem Ind Co Ltd | 射出成形された歯車 |
EP0736366A2 (en) * | 1995-04-05 | 1996-10-09 | Japan Synthetic Rubber Co., Ltd. | Molding apparatus and molding process utilizing the same |
JPH1025394A (ja) * | 1996-07-11 | 1998-01-27 | Japan Synthetic Rubber Co Ltd | ゴム強化スチレン系樹脂組成物 |
JPH1060241A (ja) * | 1996-08-22 | 1998-03-03 | Toray Ind Inc | 強化ポリエステル樹脂組成物およびその成形品 |
JPH10100156A (ja) * | 1996-09-30 | 1998-04-21 | Nippon G Ii Plast Kk | 高品質外観を有する熱可塑性樹脂の射出圧縮成形の成形品を得る方法 |
EP1142689A1 (en) * | 1999-09-21 | 2001-10-10 | Idemitsu Petrochemical Co., Ltd. | Molding method for blow molded product |
Non-Patent Citations (1)
Title |
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See also references of EP1555108A4 * |
Also Published As
Publication number | Publication date |
---|---|
EP1555108A4 (en) | 2007-07-25 |
EP1555108A1 (en) | 2005-07-20 |
US20060110576A1 (en) | 2006-05-25 |
CN1723109A (zh) | 2006-01-18 |
CN100475484C (zh) | 2009-04-08 |
US7638083B2 (en) | 2009-12-29 |
JP4266609B2 (ja) | 2009-05-20 |
JP2004130528A (ja) | 2004-04-30 |
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