WO2017115650A1 - 複合成形体の製造方法 - Google Patents
複合成形体の製造方法 Download PDFInfo
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- WO2017115650A1 WO2017115650A1 PCT/JP2016/087147 JP2016087147W WO2017115650A1 WO 2017115650 A1 WO2017115650 A1 WO 2017115650A1 JP 2016087147 W JP2016087147 W JP 2016087147W WO 2017115650 A1 WO2017115650 A1 WO 2017115650A1
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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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/12—Moulds or cores; Details thereof or accessories therefor with incorporated means for positioning inserts, e.g. labels
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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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/34—Moulds or cores; Details thereof or accessories therefor movable, e.g. to or from the moulding station
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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
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
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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
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14008—Inserting articles into 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
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/1418—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure
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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
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/1418—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure
- B29C45/14262—Clamping or tensioning means for the insert
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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
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14778—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the article consisting of a material with particular properties, e.g. porous, brittle
- B29C45/14786—Fibrous material or fibre containing material, e.g. fibre mats or fibre reinforced 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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
- B29C70/46—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs
- B29C70/48—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs and impregnating the reinforcements in the closed mould, e.g. resin transfer moulding [RTM], e.g. by vacuum
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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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
- B29C70/541—Positioning reinforcements in a mould, e.g. using clamping means for the reinforcement
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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
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14065—Positioning or centering articles in the mould
- B29C2045/14147—Positioning or centering articles in the mould using pins or needles penetrating through the insert
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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
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14065—Positioning or centering articles in the mould
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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
- B29K2105/08—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
- B29K2105/0872—Prepregs
Definitions
- the present invention relates to a method for manufacturing a composite molded body, and in particular, a tape-shaped fiber reinforced resin (FRP) base material is molded into a three-dimensional shape in a mold and is manufactured with a thermoplastic resin to manufacture a composite molded body. On how to do.
- FRP fiber reinforced resin
- a carbon fiber reinforced resin (CFRP) sheet material base material is temporarily shaped outside the mold, and then shaped by inserting it into the mold and rapidly raising and lowering the temperature.
- CFRP carbon fiber reinforced resin
- a method is disclosed in which a composite molded body is obtained by inserting a resin into the inside and injecting a resin.
- at least provisional shaping is performed outside the mold, so that the molding process is complicated rather than a process that can be combined in the same mold.
- Patent Document 2 discloses a method of fixing a CFRP base material in an injection mold and injecting a resin to form a composite, but there is only a description of a simple layered composite molded body. The method for shaping the original CFRP substrate is not mentioned.
- Patent Document 3 discloses a method for manufacturing a composite molded body in which CFRP is stamped and molded in a mold, a space is formed by backing the mold, and a resin is injected into the same mold.
- this method is suitable for molding a random fiber substrate in which reinforcing fibers are randomly arranged, but requires preheating for stamping molding.
- CFRP flows together with the resin at the time of injection, and CFRP is positioned at a desired position of the molded product. There is a problem in that it is difficult to bond them with high accuracy.
- Patent Document 4 discloses a method of manufacturing a composite molded body in which an injection molded product and a CFRP base material are thermally welded in a molding machine.
- the CFRP base material is bonded by laser welding, press molding, or the like. Therefore, the CFRP base material is particularly bonded to the three-dimensional shape portion of the injection molded product. Have difficulty.
- the object of the present invention is to pay attention to the problems in the prior art as described above.
- the tape-shaped FRP base material is shaped into a three-dimensional shape and the thermoplastic resin has a high bonding strength. It is to provide a method capable of manufacturing a composite molded body having a three-dimensional shape portion that is integrated with high accuracy and has a target three-dimensional shape efficiently.
- Another object of the present invention is to make it possible to maintain a desired integrated shape and integrated form during or after molding in the thermoplastic resin that is joined and integrated as described above.
- An object of the present invention is to provide a method for producing a composite molded body in which special devices are partially added.
- a method for producing a composite molded body according to the present invention includes forming a tape-shaped FRP base material into a three-dimensional shape in an injection mold and integrating it with a thermoplastic resin composition A.
- a method of manufacturing a composite molded body (1) a first step of inserting an FRP base material into a mold from a slit provided in the mold, and inserting the inserted FRP base material along the mold cavity; (2) The molten thermoplastic resin composition A is injected into the mold cavity, the FRP substrate is shaped into a three-dimensional shape, and the injected thermoplastic resin composition A is integrated with the FRP substrate.
- Process (First method).
- a more preferable method for producing a composite molded body according to the present invention is to form a tape-shaped FRP base material into a three-dimensional shape in an injection mold and to integrate with the thermoplastic resin composition A.
- a method of manufacturing (1) a first step of inserting an FRP base material into a mold from a slit provided in the mold, and inserting the inserted FRP base material along the mold cavity; (2) Step 1a in which the slide core is moved to place the FRP base material in the cavity, (3) The molten thermoplastic resin composition A is injected into the mold cavity, the FRP substrate is shaped into a three-dimensional shape, and the injected thermoplastic resin composition A is integrated with the FRP substrate.
- a tape-shaped FRP base material is inserted from the slit portion into the mold, and along the mold cavity. It is inserted into the mold cavity along the extended shape of the mold cavity. In this state, the FRP base material is in a state where most of the FRP base material is inserted into the mold cavity, but the end portion of the FRP base material is almost free.
- the FRP substrate inserted into the mold moves the slide core, whereby the FRP substrate is completely installed and held in the cavity.
- the molten thermoplastic resin composition A is injected into the mold cavity and integrated with the FRP base material inserted into the cavity to be a target.
- a composite molded body is formed.
- the FRP base material held in the cavity by the injection pressure of the resin composition A is pressed against the inner surface of the cavity. Therefore, if the cavity is formed in a predetermined three-dimensional shape, The three-dimensional shape portion of the composite molded body formed by integration with the material, and by extension, the FRP base material is shaped and molded into a desired shape with extremely high accuracy.
- the molding of the FRP base material into the three-dimensional shape in the mold by the injection resin pressure of the molten thermoplastic resin composition A takes less time than a normal three-dimensional shaping method using a press or the like. Can be shaped in
- these series of steps are executed in the same mold, it is possible to further improve the molding accuracy, simplify and facilitate the molding from this aspect.
- a series of processes can be automated.
- the FRP substrate attached to the mold is used before the FRP substrate is placed in the cavity in the step 1a.
- disconnect can be mentioned.
- a composite molded body can be obtained without being cut into a predetermined length in advance, so that the entire molding process can be further simplified. Can be automated.
- an additional molded portion having a molded shape partially different from the surrounding portion is formed in the molded portion made of the thermoplastic resin composition A.
- the form can be mentioned.
- problems such as warping of the molded body due to the difference in linear expansion coefficient between the FRP base material and the thermoplastic resin composition A and peeling of the molded part due to the FRP base material or the thermoplastic resin composition A occur.
- a secondary molded product is manufactured by a method in which a composite molded product is used as a primary molded product, the primary molded product is inserted into another cavity, and a molten thermoplastic resin composition B is injected into the cavity. And the primary molded product are eliminated, and the inflow of the molten thermoplastic resin composition B into the voids can be suppressed.
- Examples of the additional molded part formed in the molded part of the thermoplastic resin composition A include those that form convex parts, bosses, ribs, hinges, flanges, claws, molded article side walls, and the like. May be formed singly or in combination.
- the molded part by the thermoplastic resin composition A can be partially reinforced, and it can contribute to avoid warping or peeling of the composite molded body.
- an additional molded part such as a flange, a claw, or a molded product side wall is formed, a special part can be imparted to the molded part made of the thermoplastic resin composition A so as to partially satisfy the required function.
- a rib and a side wall of the molded body are preferable because the effect of suppressing the inflow of the resin into the gap during the production of the secondary molded product is great.
- the tape-like FRP base material can include a form containing continuous reinforcing fibers.
- FRP The base material itself can have excellent mechanical properties, and the FRP base material can improve the reinforcing effect of the composite molded body.
- the form which a tape-like FRP base material consists of a unidirectional base material which arranged the continuous reinforcement fiber in one direction is preferable.
- a unidirectional base material can exhibit particularly high mechanical properties in a specific direction in which continuous reinforcing fibers are arranged, so that the tape-like FRP base material is integrated with high accuracy at a predetermined position.
- the composite molded body as a whole can exhibit high mechanical properties efficiently in a desired specific direction.
- the reinforcing FRP base material has a tape-like shape, it is possible to efficiently perform the predetermined reinforcement by focusing on the portion where the reinforcement is required for the composite molded body to be molded.
- the thermoplastic resin composition A injected in the second step may be a resin composition containing discontinuous reinforcing fibers as necessary. If a thermoplastic resin composition containing discontinuous reinforcing fibers is used, the portion formed of the injection-filled molten thermoplastic resin composition A is also configured as a fiber-reinforced resin portion. The whole can be composed of fiber reinforced resin, and the mechanical properties of the entire composite molded body can be improved.
- the types of reinforcing fibers used for the tape-shaped FRP substrate include carbon fibers, glass fibers, aramid fibers, other reinforcing fibers, and further these reinforcing fibers.
- carbon fibers may be included as reinforcing fibers. preferable.
- thermoplastic resin composition A is preferably composed of at least one resin selected from polyamide resins, polyarylene sulfide resins, and polyolefin resins.
- a mold cavity provided with a slide mechanism can be used.
- the cavity is slid into the newly set second cavity together with the composite molded body, the composite molded body is placed in the second cavity, and the second A composite molded body as a secondary molded product can be manufactured by injection-filling and integrating the molten thermoplastic resin composition A in the cavity.
- the composite molded product as the primary molded product is molded into a composite molded product in which a desired portion is efficiently and accurately reinforced by the tape-shaped FRP base material, and a secondary composite molded product using the molded product.
- the composite molded body shaped into a three-dimensional shape as described above is used as a primary molded product, and the composite molded body as the primary molded product is used as another mold. It is also possible to manufacture a composite molded body as a secondary molded article by inserting the molten thermoplastic resin composition B into the cavity and injecting the molten thermoplastic resin composition B into the cavity.
- the composite molded body as the primary molded product is molded into a composite molded body in which a desired portion is reinforced efficiently and accurately by the tape-shaped FRP base material.
- the composite molded body as the next molded product is also molded into a composite molded body in which a desired portion is efficiently and accurately reinforced.
- the mold temperature during molding of the thermoplastic resin composition A is in the range of 100 to 200 ° C., that is, depending on the type of the thermoplastic resin composition A. Is preferably in a relatively high temperature range. When the mold temperature is within this range, the tape-shaped FRP base material is easily shaped into a three-dimensional shape, and fiber breakage during shaping is suppressed. It is more preferably 120 ° C. or higher, and further preferably 140 ° C. or higher.
- both of the thermoplastic resin composition A and the thermoplastic resin composition B to be injected may be resin compositions containing discontinuous reinforcing fibers as necessary. If a thermoplastic resin composition containing discontinuous reinforcing fibers is used, the portion formed of the injection-filled molten thermoplastic resin composition is also configured as a fiber-reinforced resin portion. Apart from this, the entire composite molded body can be made of fiber reinforced resin, and the mechanical properties of the entire composite molded body can be improved.
- a composite molded body in which a desired portion is efficiently and accurately reinforced in the same mold can be molded easily and with high accuracy. It becomes possible. Further, the composite molded body as the secondary molded product using the composite molded body molded in this way can be easily molded with high accuracy. Furthermore, if an additional molded part is formed in the molded part of the thermoplastic resin composition A as required, it is possible to effectively prevent the occurrence of defects such as warping and peeling during molding or after molding. Thus, a desired composite molded body can be produced more reliably and easily.
- FIG. 1 It is a schematic sectional drawing which shows the manufacturing method of the composite molded object which concerns on the 1st embodiment of this invention. It is a perspective view which shows an example of the composite molded object as a primary molded article. It is a perspective view which shows an example of the composite molded object as a secondary molded article.
- the manufacturing method of the composite molded object which concerns on 2nd embodiment of this invention is shown, (A) is a schematic plan view of a tape-shaped FRP base material, (B) is a planar view of the composite molded object which is going to be shape
- FIG. 1 It is a schematic perspective view of the composite molded object which has the three-dimensional shape part manufactured by the manufacturing method of the composite molded object which concerns on the 3rd embodiment of this invention. It is a schematic perspective view of the composite molded object which has the three-dimensional shape part manufactured by the manufacturing method of the composite molded object which concerns on the 4th embodiment of this invention.
- the various examples of the additional molding part in the composite molded object manufactured with the manufacturing method of the composite molded object which concerns on this invention are shown, (A) and (B) are schematic side views of a composite molded object, (C) is schematic. It is a side view and a partial schematic plan view.
- the method for producing a composite molded body according to the present invention is as follows: (1) A tape-like FRP base material is inserted into a mold from a slit provided in the mold, and inserted. First step of inserting the FRP base material along the mold cavity, (2) The molten thermoplastic resin composition A is injected into the mold cavity, and the FRP base material is shaped into a three-dimensional shape and injected. In the second method, the thermoplastic resin composition A is integrated with the FRP substrate. In the second method, (1) the tape-shaped FRP substrate is removed from the slit provided in the mold.
- a tape-shaped FRP substrate for example, a tape-shaped substrate made of a unidirectional substrate in which reinforcing fibers are arranged in one direction along the longitudinal direction.
- the FRP base material 1 (in the illustrated example, two tape-shaped FRP base materials 1) is an arrow pointing from the slit portion 3 (two slit portions 3 in the illustrated example) provided in the mold 2 into the mold 2
- the FRP base material 1 inserted from the slit portion 3 is inserted into the mold cavity 4 with the tip side portion along the mold cavity 4. And is inserted to a predetermined length, that is, to the back of the mold cavity 4 in the illustrated example.
- the slit part 3 is formed, for example, as a gap carved into the mold 2 with the mold 2 closed.
- the sent FRP base material 1 is still in a state where the inner part of the mold 2 and the outer part of the mold 2 are connected. There is.
- the FRP base material 1 attached to the mold 2 is removed.
- the slide cores 5 provided at the upper and lower positions in the drawing are moved in the direction of the arrows in the drawing, and the FRP base material 1 is cut.
- the die 2 side end portion 6 of the cut FRP base material 1 is substantially free in the cut state, but continues, for example, as shown in FIG. Are further moved in the same direction, and the cut FRP base material 1, particularly the cut end 6 thereof, is stored in the cavity 4.
- an appropriate curved surface is formed on the inner surface side of the slide core 5.
- the cut end portion 6 of the FRP base material 1 is smoothly placed in a predetermined position in the cavity 4 through the curved surface.
- thermoplastic resin composition A melted in the cavity 4 of the closed mold 2. (7) is injected, and the FRP base material 1 stored in the cavity 4 is pressed against the inner surface of the cavity 4 by using the molten resin injection pressure, and the three-dimensional shape following the inner surface shape of the cavity 4 is applied.
- the injected thermoplastic resin composition A (7) and the shaped FRP substrate 1 are firmly integrated to obtain a target composite molded body.
- the composite molded body formed in this way becomes a composite molded body 11 having a three-dimensional shape as shown in FIG. 2, for example.
- the FRP base material 1 is included and integrated in a predetermined three-dimensional shape, so that the target site can be efficiently and accurately reinforced by the FRP base material 1.
- the composite molded body 11 thus obtained is obtained.
- the composite molded body 11 shaped in the three-dimensional shape as described above is inserted into a cavity of another mold, and a molten thermoplastic resin (the same resin as the thermoplastic resin 7 described above) is inserted into the cavity.
- a composite molded body as a secondary molded article can be produced by injecting a different resin.
- the composite molded body 11 as described above is placed in a cavity of another mold symmetrically, and the composite molded bodies 11a and 11b are melted in the cavity.
- the thermoplastic resin thermoplastic resin composition B
- the secondary molded product 13 can be produced.
- the FRP base material 1 is integrated with high precision into the composite molded body 11 as the primary molded product. Therefore, the reinforcing FRP base material 1 is also formed after the secondary molded product 13 is molded. Is integrated with the target part with high accuracy, and the secondary molded product 13 in which the target part is reinforced with high accuracy is obtained.
- the secondary molded product can be molded using the same mold as that used for molding the composite molded body 11 as the primary molded product, particularly a mold having a slide mechanism.
- a second cavity is newly set using a slide mechanism, and the original mold cavity and the composite molded body 11 are used as the second cavity.
- the composite molded body as a secondary molded product is integrated by injection-filling the thermoplastic resin composition A (7) which is placed in the second cavity and melted in the second cavity. Can be produced.
- the thermoplastic resin composition injected in the secondary molding is the same thermoplastic resin composition A (7) as in the primary molding.
- a tape-shaped FRP base material is inserted into the cavity of the injection mold, and the molten thermoplastic resin composition A is injected to shape the FRP base material into a three-dimensional shape.
- the additional molding part include a convex part, a boss, a rib, a hinge, a flange, a claw, a side wall of the molded body, and the like.
- a tape-shaped FRP base material 21 for example, a nylon 6 carbon fiber continuous fiber having a width of 20 mm, a thickness of 0.3 mm, and a continuous fiber content of 50% by weight
- the FRP substrate 21 is molded by the resin pressure of the molten thermoplastic resin composition A, for example, glass fiber 40% reinforced polyamide 6 injected into the injection mold. It is pressed against the inner surface of the cavity and shaped into a three-dimensional shape and is integrated with the thermoplastic resin A. In the molded part of the thermoplastic resin A, ribs as additional molded parts are formed.
- the tape-like FRP base material 21 is shown in a flat plate state as shown in FIG. 4 (A) for easy understanding.
- the molding part 22 made of the thermoplastic resin composition A integrated with the FRP base material 21 a part 23 molded into a shape along the FRP base material 21.
- ribs 24 are formed as additional molding portions.
- the FRP base material 21a shaped into a three-dimensional shape and the molded portion 23 of the thermoplastic resin A having a shape along the FRP base material 21a are integrated.
- a composite molded body 25 having a three-dimensional shape portion on which the ribs 24 are integrally molded is molded.
- the three-dimensional shape of the tape-shaped FRP base material 21 and the injection molding of the thermoplastic resin composition A can be performed in the same mold, and usually using a press machine or the like. Compared with the three-dimensional shaping method, shaping and integration can be performed easily and efficiently in a short time. Further, when the rib 24 as the additional molding portion as shown in FIG. 4 is not provided, warping or peeling occurs depending on the shape due to the difference in the linear expansion coefficient between the thermoplastic resin composition A and the FRP base material 21. On the other hand, by providing the ribs 24, the composite molded body 25 having a target shape can be obtained reliably and with high accuracy.
- thermoplastic resin composition B in the case of producing a secondary injection molded product by further injecting the thermoplastic resin composition B using the composite molded body 25 as a primary molded body, two composite molded bodies 25 as the primary molded body molded as described above are used. It becomes easy to insert the next molding die into a predetermined position, and the accuracy is improved.
- secondary molding in which the cavity is slid into a newly set second cavity in the same mold having a slide mechanism and the thermoplastic resin composition A is injected into the second cavity. Similarly, efficient and highly accurate molding is possible.
- the rib 24 as the additional molding part shown in FIG. 4 can also take a form as shown in FIG.
- a molded portion 33 made of the thermoplastic resin A is integrated on a tape-shaped FRP base material 32 shaped into a three-dimensional shape.
- the rib 34 as a single band-shaped additional forming portion is integrally formed in a standing manner.
- the additional molding part is not limited to the rib as described above, but may take the form of a boss part.
- a molded portion 43 made of the thermoplastic resin A is integrated on a tape-shaped FRP base material 42 shaped into a three-dimensional shape.
- the bosses 44 as additional molding portions are integrally formed as many as required for the required portion.
- FIG. 7 various forms as shown in FIG. 7 can be employed, for example.
- an additional molded portion is formed on a portion where a tape-shaped FRP base material and a molded portion made of the thermoplastic resin A are integrated, particularly on the molded portion 52 made of the thermoplastic resin A.
- the convex portion 53 is formed integrally.
- a flange 62 and a claw 63 as an additional molded portion are integrally formed in the composite molded body 71 shown in FIG. 7C.
- a boss 72, a rib 73, a hinge 74, and a side wall 75 as an additional molded portion are integrally formed.
- various types of additional molded portions can be appropriately provided alone or in a combined form as necessary.
- the composite molded body formed into a three-dimensional shape as described above is used as a primary molded product in another cavity (a cavity of another mold or another mold of the same mold).
- the thermoplastic resin composition B (the same thermoplastic resin composition as the thermoplastic resin composition A) may be inserted into the cavity) and melted in the cavity.
- a composite molded body as a secondary molded article can also be produced by injecting a thermoplastic resin composition different from the composition A). In this case, by providing the additional molding portion described above in another cavity, it is possible to install the primary molded body at a desired position with high accuracy.
- the thermoplastic resin composition A or the thermoplastic resin composition B is injected for secondary molding, the primary molded body does not flow, so the FRP base material is integrated with high accuracy.
- the obtained secondary molded product can be obtained.
- the method for producing a composite molded body according to the present invention can be applied to the production of any composite molded body in which a tape-shaped FRP substrate is shaped into a three-dimensional shape and integrated with a thermoplastic resin.
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Abstract
Description
(1)FRP基材を金型に設けられたスリット部から金型内に向けて挿入し、挿入されたFRP基材を金型キャビティに沿わせて差し込む第1工程、
(2)溶融熱可塑性樹脂組成物Aを金型キャビティ内に射出し、FRP基材を三次元形状に賦形するとともに、射出した熱可塑性樹脂組成物AをFRP基材と一体化する第2工程、
を有することを特徴とする方法からなる(第1の方法)。
(1)FRP基材を金型に設けられたスリット部から金型内に向けて挿入し、挿入されたFRP基材を金型キャビティに沿わせて差し込む第1工程、
(2)スライドコアを移動させてFRP基材をキャビティ内に納める第1a工程、
(3)溶融熱可塑性樹脂組成物Aを金型キャビティ内に射出し、FRP基材を三次元形状に賦形するとともに、射出した熱可塑性樹脂組成物AをFRP基材と一体化する第2工程、
を有することを特徴とする方法からなる(第2の方法)。すなわち、前述の第1の方法の第1工程と第2工程の間に第1a工程を加えた方法である。
本発明に係る複合成形体の製造方法は、第1の方法においては、(1)テープ状のFRP基材を金型に設けられたスリット部から金型内に向けて挿入し、挿入されたFRP基材を金型キャビティに沿わせて差し込む第1工程、(2)溶融熱可塑性樹脂組成物Aを金型キャビティ内に射出し、FRP基材を三次元形状に賦形するとともに、射出した熱可塑性樹脂組成物AをFRP基材と一体化する第2工程を有しており、第2の方法においては、(1)テープ状のFRP基材を金型に設けられたスリット部から金型内に向けて挿入し、挿入されたFRP基材を金型キャビティに沿わせて差し込む第1工程、(2)スライドコアを移動させてFRP基材をキャビティ内に納める第1a工程、(3)溶融熱可塑性樹脂組成物Aを金型キャビティ内に射出し、FRP基材を三次元形状に賦形するとともに、射出した熱可塑性樹脂組成物AをFRP基材と一体化する第2工程を有しており、これら一連の工程が同一の金型内で実行される。
2 金型
23 スリット部
4 金型キャビティ
5 スライドコア
6 FRP基材の切断端部
7 熱可塑性樹脂(組成物)
11、11a、11b 複合成形体
12 熱可塑性樹脂成形部
13 二次成形品
21 テープ状のFRP基材
21a 三次元形状に賦形されたFRP基材
22 熱可塑性樹脂組成物Aによる成形部
23 FRP基材に沿う形状に成形される部分
24 付加成形部としてのリブ
25 複合成形体
31、41、51、61、71 複合成形体
32、42 三次元形状に賦形されたテープ状のFRP基材
33、43、52 熱可塑性樹脂組成物Aによる成形部分
34 付加成形部としてのリブ
44 付加成形部としてのボス
53 付加成形部としての凸状部
62 付加成形部としてのフランジ
63 付加成形部としてのツメ
72 付加成形部としてのボス
73 付加成形部としてのリブ
74 付加成形部としてのヒンジ
75 付加成形部としての側壁
Claims (12)
- 射出成形金型内でテープ状のFRP基材を三次元形状に賦形するとともに熱可塑性樹脂組成物Aと一体化して複合成形体を製造する方法であって、
(1)FRP基材を金型に設けられたスリット部から金型内に向けて挿入し、挿入されたFRP基材を金型キャビティに沿わせて差し込む第1工程、
(2)溶融熱可塑性樹脂組成物Aを金型キャビティ内に射出し、FRP基材を三次元形状に賦形するとともに、射出した熱可塑性樹脂組成物AをFRP基材と一体化する第2工程、
を有することを特徴とする複合成形体の製造方法。 - 射出成形金型内でテープ状のFRP基材を三次元形状に賦形するとともに熱可塑性樹脂組成物Aと一体化して複合成形体を製造する方法であって、
(1)FRP基材を金型に設けられたスリット部から金型内に向けて挿入し、挿入されたFRP基材を金型キャビティに沿わせて差し込む第1工程、
(2)スライドコアを移動させてFRP基材をキャビティ内に納める第1a工程、
(3)溶融熱可塑性樹脂組成物Aを金型キャビティ内に射出し、FRP基材を三次元形状に賦形するとともに、射出した熱可塑性樹脂組成物AをFRP基材と一体化する第2工程、
を有することを特徴とする複合成形体の製造方法。 - 前記第1a工程において、FRP基材をキャビティ内に納める前に、金型に付設されたFRP基材を切断する機能を有するスライドコアを移動させて、FRP基材を切断する、請求項2に記載の複合成形体の製造方法。
- 前記熱可塑性樹脂組成物Aによる成形部中に、成形形状が部分的に周囲部とは異なる付加成形部を形成する、請求項1~3のいずれかに記載の複合成形体の製造方法。
- 前記付加成形部が、凸状部、ボス、リブ、ヒンジ、フランジ、ツメおよび成形体側壁の少なくともいずれか一つである、請求項4に記載の複合成形体の製造方法
- 前記FRP基材が連続強化繊維を含む、請求項1~5のいずれかに記載の複合成形体の製造方法。
- 前記FRP基材が、連続強化繊維を一方向に配列させた一方向基材からなる、請求項6に記載の複合成形体の製造方法。
- 前記FRP基材の強化繊維が炭素繊維を含む、請求項1~7のいずれかに記載の複合成形体の製造方法。
- 前記熱可塑性樹脂組成物Aが、ポリアミド系樹脂、ポリアリーレンサルファイド系樹脂、ポリオレフィン系樹脂から選ばれる少なくとも1種の樹脂からなる、請求項1~8のいずれかに記載の複合成形体の製造方法。
- 前記金型キャビティとしてスライド機構を備えた金型キャビティを用いる、請求項1~9のいずれかに記載の複合成形体の製造方法。
- 前記スライド機構を備えたキャビティを第1のキャビティとしたとき、該第1のキャビティを前記複合成形体とともに新たに設定された第2のキャビティにスライドさせ、前記複合成形体を前記第2のキャビティ内に配置し、該第2のキャビティ内に溶融した熱可塑性樹脂組成物Aを射出充填して一体化することにより二次成形品としての複合成形体を製造することを特徴とする、請求項10に記載の複合成形体の製造方法。
- 三次元形状に賦形された複合成形体を別の金型のキャビティにインサートし、該キャビティ内に溶融した熱可塑性樹脂組成物Bを射出することにより二次成形品としての複合成形体を作製する、請求項1~9のいずれかに記載の複合成形体の製造方法。
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