JP5645102B2 - Laminated molding method and laminated molded product of fiber reinforced resin - Google Patents

Description

  The present invention relates to a molding method and a molded product of an injection-molded product in which a resin is reinforced with a fiber material, and more particularly to a laminate-molding method and a laminated molded product of a fiber-reinforced resin in which a resin is injection-molded into a laminated state to obtain a laminated product.

  For the purpose of improving thermal and mechanical properties and dimensional stability without impairing the properties of the resin, a fiber reinforced resin in which glass fiber or the like is mixed with the resin is used for the molded product. When this fiber reinforced resin is injection-molded in a single layer, the mixed glass fibers are aligned in the resin flow direction, and thus have a directionality in the molding shrinkage, which causes problems such as warpage and strength directionality. doing.

In order to solve the problems of the prior art, the mold cavity is held at an interval smaller than the thickness of the target molded article and filled with a molten resin containing a fiber material, and then the mold cavity is enlarged to a predetermined interval, and the enlargement is performed. An injection molding method is disclosed in which a melted resin containing a fiber material is filled in a cavity that intersects the filling direction of the molten resin to obtain a molded product in a laminated state.
In this molding method, the fibers in each layer of the molded product formed in a plurality of layers are oriented in a direction crossing each other, so that the mechanical strength can be increased. (See Patent Document 1)

Further, a skin layer is formed by filling the mold cavity with the first molten resin containing the long fiber material, and the core is filled with the second molten resin containing the short fiber material when the skin layer is uncured. An injection molding method is disclosed in which a layer is formed to obtain a sandwich molded product.
In this molding method, the long fibers are oriented in the flow direction near the surface, and the short fibers are oriented in the direction perpendicular to the flow near the center in the thickness direction, so that the rate of decrease in strength of the molded product can be reduced. (See Patent Document 2)

However, in the conventional injection molding method using a resin material that is chopped strand of fiber material in advance and dry-blended with a resin at a certain blending ratio and pelletized, a molded product in which the blending ratio of the fiber material is different for each laminated layer It was difficult to get.
In addition, since the fibers are oriented near the surface of the molded product, particularly when long fiber materials are included or when the blending ratio of the fiber materials is increased, the surface property deteriorates and post-processing or painting is required. Had.

JP-A-63-315218 JP 05-329886 A

  The present invention has been made in view of the above-described conventional injection molding methods and problems of molded products, and the fiber reinforced resin has a different surface area on the design surface while the blending ratio of the fiber material varies from layer to layer. An object of the present invention is to provide a laminate molding method and a laminate molded product.

According to a first aspect of the present invention, there is provided a method for laminating and forming a fiber reinforced resin, comprising: a first injection device for forming a base material layer by filling a molten resin containing a fiber material; and a molten resin containing a fiber material. In the method for laminating and forming a fiber reinforced resin using a second injection device for forming a surface layer and reinforcing the resin with a fiber material and laminating the surface layer on the base material layer, the first and second injections The resin molding material used for the apparatus is a material obtained by directly mixing a predetermined amount of resin pellets, the fiber material, and a plurality of additives immediately before molding a laminated molded product, and the base material layer. And the said surface layer is set as the compounding rate (weight content rate) of a different fiber material, respectively.
According to a second aspect of the present invention, there is provided a method for laminating a fiber reinforced resin according to the first aspect, wherein the surface layer is filled after the base material layer is filled.
According to a third aspect of the present invention, there is provided a method for laminating a fiber reinforced resin according to the first aspect, wherein the surface layer and the base material layer are filled substantially simultaneously.

In the invention according to any one of claims 1 to 3, the fiber reinforced resin laminate molding method according to claim 4 of the present invention is the ratio of the fiber material forming the surface layer (weight content), The base material layer is characterized by having a value smaller than the blending ratio (weight content) of the fiber material to be molded.
The fiber reinforced resin laminate molding method according to claim 5 of the present invention is the invention according to any one of claims 1 to 4, wherein the fiber material is selected from a group of glass fibers, carbon fibers, and organic fibers. It is characterized by selecting.
The fiber reinforced resin laminate molding method according to claim 6 of the present invention is the invention according to any one of claims 1 to 5, wherein the fiber material has a blending ratio (weight content) of 5 to 60 weights. %.

The fiber reinforced resin laminate molding method according to claim 7 of the present invention is the invention according to any one of claims 1 to 6, wherein the length of the fiber material used for the resin molding material is defined as a fiber bundle diameter. 5 to 1000 times greater than
The fiber reinforced resin laminate molding method according to claim 8 of the present invention is the invention according to any one of claims 1 to 7, wherein the plurality of additives supplied to the resin molding material are modifiers. A plurality of colorants, fillers, antistatic agents, lubricants, stabilizers, flame retardants, surfactants, and the like.

  A laminated product of fiber reinforced resin according to claim 9 of the present invention is a fiber in which a mold cavity is filled with a molten resin containing a fiber material serving as a base material layer, and then a fiber that becomes a surface layer after filling of the base material layer is completed. In a laminated molded product in which a molten resin containing a material is filled and a surface layer is laminated on a base material layer, a predetermined amount of resin pellets and a fiber material are formed on the resin molded material of the laminated product immediately before molding the laminated molded product. And a plurality of additives directly mixed by a mixing means, the resin molding materials of the base material layer and the surface layer are set to different fiber material mixing ratios (weight contents), and the surface layer is molded. The blending ratio (weight content) of the fiber material is set to a value smaller than the blending ratio (weight content) of the fiber material forming the base material layer.

  The laminated molded product of fiber reinforced resin according to claim 10 of the present invention is filled with a molten resin containing a fiber material as a surface layer in a mold cavity and a molten resin containing a fiber material as a base layer substantially simultaneously. Then, in the laminated molded product in which the surface layer is laminated on the base material layer, a predetermined amount of resin pellets, a fiber material, and a plurality of additives are added to the resin molded material of the laminated product immediately before molding the laminated molded product. Using the material directly mixed by the mixing means, the resin molding material of the base material layer and the surface layer is set to a blending rate (weight content) of different fiber materials, and the blending rate (weight content of the fiber material forming the surface layer) The ratio is set to a value smaller than the blending ratio (weight content) of the fiber material forming the base material layer.

In the molding method of the present invention, immediately before molding, since the composition is such that the resin and additive are directly blended and mixed at different fiber materials in the base layer and the surface layer, the mixed molding material is supplied to each injection device. A molded product laminated with resin layers having different fiber blending ratios can be obtained.
The resin molding material is a direct blend, and the manufacturing process of pellets containing blended fiber material with resin is omitted, so the resin material has less heat history and less fiber material breakage, improving the quality of the molded product. To do. And the energy for pellet manufacture can be reduced and the cost of a molded article can be reduced.
It is possible to arbitrarily obtain a fiber material mixing ratio that is optimal for a molded product that takes rigidity, surface properties, and deformation (warpage) into account.

It is drawing explaining the structure of the injection molding apparatus used for the shaping | molding method of this invention. It is drawing explaining the shaping | molding process using the metal mold | die which recedes the movable mold | type shown in FIG. 1 by the shaping | molding method of this invention, and forms the cavity of a surface layer. It is drawing explaining the shaping | molding process using the metal mold | die which a movable type | mold slides and forms the cavity of a surface layer by the shaping | molding method of this invention. It is drawing explaining the shaping | molding process using the metal mold | die which a movable mold | type rotates by the shaping | molding method of this invention and forms the cavity of a surface layer. It is drawing explaining the formation process which fills a surface layer and a base material layer substantially simultaneously.

As shown in FIG. 1, a molding apparatus 100 used in the fiber reinforced resin laminate molding method according to the present embodiment includes an injection apparatus 10, a mold 20, and a material supply apparatus 30 that supplies a molding material to the injection apparatus 10. And a mold clamping device (not shown).
The injection device 10 includes a first injection device 10A for filling a molten resin containing a fiber material to form a base material layer, and a second injection device 10B for filling a molten resin containing a fiber material to form a surface layer. Consists of. The mold 20 includes a fixed mold 21 attached to the fixed platen 1 of the mold clamping device and a movable mold 22 attached to the movable platen 2. FIG. 1 shows a state in which the movable platen 2 is retracted by a desired dimension S after forming the base material layer (first layer), and the volume of the cavity 23 is enlarged to form the surface layer (second layer). Yes.

The injection devices 10A and 10B include a barrel (11A, 11B), a screw (12A, 12B) that is built in the barrel and has a screw flight, and a nozzle (13A) that can contact the fixed mold 21 and fill molten resin into the cavity 23. 13B), the hopper (14A, 14B) for supplying the resin molding material into the barrel (11A, 11B), and the rotational drive and forward movement means of the screws (12A, 12B) (not shown) constitute the main part. ing.
By rotating the screws (12A, 12B), pellet-shaped resin is supplied from the hoppers (14A, 14B) into the barrels (11A, 11B), and the supplied resin undergoes a kneading compression action by the rotation of the screws. It is received and melted, sent to the front of the screw, and a predetermined amount is stored.
The molten resin stored in front of the screw can be supplied to the mold cavity 23 through the nozzle (13A, 13B) and the mold resin flow path by moving the screw (12A, 12B) forward.

The material supply devices 30A and 30B include tanks (31A, 31B) for storing resin pellets, resin pellet measuring devices (32A, 32B) for measuring a predetermined amount of resin pellets, and fiber material measuring devices (33A) for measuring a predetermined amount of fiber material. 33B), additive metering device (34A, 34B) for metering a predetermined amount of additive, and a molding material mixing device that mixes resin pellets, fiber material, and additive metered in a predetermined amount into a molding material (35A, 35B) and their transportation means constitute the main part.
By setting the desired blending ratio, a predetermined amount of each material is supplied to the mixing device (35A, 35B), and the molding material mixed by stirring at the predetermined blending ratio is sent to the hopper (14A, 14B). be able to. The above-described material supply devices 30A and 30B can be configured with known devices, and it is preferable that each weighing device uses a weight measurement type capable of obtaining a blending ratio with high accuracy. Moreover, a well-known stirring type is used suitably for a mixing apparatus.

The type of resin used in the present invention may be selected so that the base material layer and the surface layer are joined and integrally molded in the mold, and is generally known heat used in injection molding. A plastic resin material can be used. Examples include styrene resins, polyolefin resins, polyester resins, polyamide resins, and blended materials thereof.
Examples of the styrene resin include acrylonitrile / butadiene / styrene copolymer resin (ABS resin), polystyrene resin (for general use, for body impact, for heat resistance, etc.). Examples of the polyolefin resin include polyethylene resins (high density, medium density, low density, etc.), polypropylene resins (isotactic, syndiotactic, etc.) and the like. Examples of the polyester resin include polyethylene terephthalate and polybutylene terephthalate, and examples of the polyamide resin include 6-nylon and 12-nylon.

In the present invention, the thermoplastic resins may be used alone or in combination of two or more. Further, the resin composition can be used by adding other organic polymer substances in addition to the above-mentioned components within a range that does not impair the purpose in the field of use of the resin material used. For example, polyolefins such as polyethylene and polypropylene, or copolymers thereof, vinyl compounds such as polychlorinated materials, rubbery polymeric substances such as polybutadiene and butyl rubber, modified materials composed of polyacrylate resins, modified materials composed of thermoplastic polyester resins Etc.
These organic polymer substances may also be used in combination of two or more.

The fiber material used in the present invention may be selected from glass fiber, carbon fiber, and organic fiber group, and the fiber material is a surface treatment agent in order to increase the affinity and adhesion between the resin and the fiber. Preferably it is processed. For example, in the case where the fiber material is glass fiber, the glass fiber is bundled by spinning a filament having a diameter of 10 to 100 μm with a sizing agent containing a surface treatment agent in a range of 100 to 5000, and a fiber bundle with a glass chopper. Chop strands cut to a length of 5 to 1000 times the diameter are preferably used. Here, various types of surface treatment agents are known, and examples thereof include silane, titanate, and epoxy.
In addition, it may replace with supply with chopped strand, and the structure which cut | disconnects and supplies with a glass chopper in the fiber material measuring device (33A, 33B) in the state which roved the fiber bundle may be sufficient.

The length of the fiber material used in the present invention is 5 to 1000 times the fiber bundle diameter, but a more preferable range is 10 to 100 times . When the fiber length is smaller than 5 times the fiber bundle diameter, the desired strength of the molded product cannot be obtained, and when it is larger than 1000 times, the influence on the fluidity and surface property of the resin is large.
Moreover, although the mixture ratio (weight content) of the fiber material which occupies for a molding material was made into the range of 5 to 60 weight%, a more preferable range is the range of 20 to 50 weight%. When the blending ratio is 5% by weight or less, the desired strength of the molded product cannot be obtained, and when it is greater than 60% by weight, the influence on the fluidity and surface property of the resin is large. And in this invention, the mixture ratio of the fiber material to a base material layer is set larger than that of a surface layer.

A plurality of types of additives used in the present invention may be selected from among modifiers, colorants, fillers, antistatic agents, lubricants, stabilizers, flame retardants, surfactants, and the like. Furthermore, inorganic fillers such as talc, clay, and glass beads may be added within a range that does not impair the object of the present invention and within a range that does not impair the properties depending on the intended use.
When the additive is supplied to the additive metering device (34A, 34B), a mixture of a plurality of selected additives in a desired blending ratio is used.

The resin pellet, fiber material, and additive used in the molding method of the present invention are supplied to each weighing device provided on the popper upper portion of the injection device (10A, 10B) as described above. And it was set as the structure which mixes the measured predetermined amount of resin pellets, fiber material, and additive with a mixing device, and sends out to a molding device, but using a mixing means such as a tumbler device, respectively, a predetermined amount of resin pellets, fiber material, A configuration may be employed in which additives are added and mixed, and the mixed resin molding material is transported and supplied to the hopper of the injection apparatus.
In the fiber reinforced resin laminate molding method of the present invention, a method of dry blending the molding material immediately before molding and supplying the molding material to the molding apparatus is used, but means for dry blending other known resins with fiber materials and additives May be configured to be supplied to the molding apparatus.

With reference to FIG. 1, the structure of a mold 20 used in a method for laminating fiber reinforced resin will be described. A mold 20 shown in FIG. 1 includes a fixed mold 21 and a movable mold 22 having a fitting portion having a shear edge structure so as to surround a cavity 23, and the movable mold 22 is moved forward and backward with respect to the fixed mold 21. Thus, the movable mold 22 and the fixed mold 21 are configured to be slidable while being fitted in the fitting portion. Therefore, the cavity volume can be expanded by moving the movable mold 22 backward relative to the fixed mold 21 and opening the mold 20 by a desired dimension S (core back). The fixed mold 21 is provided with a resin flow path that communicates the nozzles (13 A, 13 B) and the cavity 23.
Since the mold having such a configuration is used, even if the cavity is filled with the molten resin with the mold opened by the dimension S, the filled molten resin does not leak out.

Next, a molding process using the mold having the configuration shown in FIG. 1 will be described with reference to FIGS. 2 (a) and 2 (b).
FIG. 2A shows a state in which the movable mold 22 and the fixed mold 21 are closed, the screw 12A of the first injection apparatus 10A that molds the base material layer moves forward, and the base material layer 25 is molded. ing. Since the gate part of the surface layer is closed by the fitting part of the movable mold 22 and the fixed mold 21 when the base material layer 25 is molded, the second injection device for molding the surface layer by the injection-filled molten resin There is no backflow to the 10B side. In the second injection device 10B, a predetermined amount of molten resin for forming the surface layer can be stored.
FIG. 2B shows that after a predetermined cooling time has elapsed, the movable mold 22 is opened by a predetermined dimension S with the base material layer 25 left in the fixed mold 21, and the mold cavity is expanded. A state in which the enlarged cavity is filled with molten resin and the surface layer 26 is laminated and integrated with the base material layer 25 is shown. Thereby, a laminated molded product in which the surface layer 26 is laminated on the base material layer 25 can be obtained.

  As shown in FIGS. 2A and 2B, the base material layer 25 is fixed to the fixed mold 21 side, and then the mold is opened to form a surface layer cavity between the movable mold 22 and the base material layer 25. The surface layer 26 is formed and laminated with the formed cavities, but the base layer 25 is fixed to the movable mold 22 side, and then the mold is opened to provide a space between the fixed mold 21 and the base layer 25. In this case, a gate may be disposed in the cavity so as to be filled with the molten resin.

  In the mold having the configuration shown in FIG. 1, after forming the base material layer 25, the mold is once retracted to open the mold, and a cavity is formed between the base material layer 25 and the cavity surface of the movable mold 22. However, the movable core is arranged in the cavity portion of the mold to form a cavity variable mechanism, and the mold is closed after the base material layer 25 is molded, and the movable core is moved by driving means such as a hydraulic cylinder to move the cavity. The structure to form may be sufficient.

Based on FIGS. 3A and 3B, an embodiment using a mold in which a movable mold slides to form a surface cavity will be described.
First, a mold 50 shown in FIGS. 3A and 3B includes a fixed mold 51 attached to a fixed plate of a mold clamping device (not shown), two cavities, a base layer cavity and a surface layer cavity. It is basically composed of a slide mold 52 having surfaces 57 and 58. The slide mold 52 is attached to an intermediate board 3 provided on a movable board (not shown) of the mold clamping device and having a slide mechanism of the slide mold 52, and can be brought into and out of contact with the fixed mold 51.
The fixed mold 51 is provided with a resin flow path that communicates the nozzles (13A, 13B) and the cavity.

The cavity surface 58 for the base material layer of the movable mold 52 is provided with a protrusion 59 that closes the gate for forming the surface layer when the base material layer 55 is formed. For this reason, when the base material layer 55 is formed, the molten resin does not flow back to the second injection device 10B via the flow path. In addition, a channel (hole) for forming a surface layer on the base material layer 55 is provided by the protrusion 59.
Although the cavity surfaces 57 and 58 of the base layer cavity and the surface layer cavity are integrally provided on the movable mold 52, the respective cavities are independent molds, and the molds are connected to each other. It may be.

A molding process using a mold on which the movable mold slides will be described below with reference to FIGS.
FIG. 3A shows a state in which the movable mold 52 and the fixed mold 51 are closed, the screw 12A of the first injection apparatus 10A that molds the base material layer is advanced, and the base material layer 55 is molded. ing. When the base material layer 55 is formed, the gate portion of the surface layer is closed by the protrusion 59 that closes the gate, so that the injection-filled molten resin flows back to the second injection device 10B side for forming the surface layer. There is nothing. In the second injection device 10B, a predetermined amount of molten resin for forming the surface layer can be stored.

In FIG. 3B, after a predetermined cooling time, the movable mold 52 is moved by opening the movable mold 52 with a predetermined dimension while the base material layer 55 remains on the fixed mold 51. Next, the movable mold 52 is slid so that the surface layer cavity 57 faces the fixed mold 51 and is closed again, and the surface layer is formed in the cavity formed between the surface cavity surface 58 and the base material layer 55. The state which shape | molded 56 is shown. Thereby, the base material layer 55 and the surface layer 56 are laminated | stacked and the laminated molded product which was integrated can be obtained. When the surface layer 56 is molded, the molten resin is filled into the cavity through the flow path (hole) provided in the base material layer 55.
Molding is completed by opening the mold after a predetermined cooling time has elapsed and taking out the molded product from the mold. By repeating the above-described operation, a molded product can be obtained continuously.

An embodiment using a mold in which a movable mold rotates to form a surface cavity will be described with reference to FIGS.
A mold 60 shown in FIGS. 4 (a) and 4 (b) is slidably engaged with a fixed mold 61 attached to a fixed plate of a mold clamping device (not shown) and a movable plate (not shown), and A plurality of movable molds having different cavity volumes attached to an intermediate plate 5 that is rotatably arranged with the axis of the molding apparatus as a horizontal plane or a vertical plane, that is, a movable mold 62 for molding a base layer and a movable mold for surface layer molding. Basically constituted by the mold 63.
The fixed mold 61 is provided with a resin flow path that connects the nozzles (13A, 13B) and the cavity.
Reference numeral 6 denotes a rotation center of the intermediate plate 5 that rotates in a mold-open state, and in the figure, rotates with the paper surface as a horizontal plane.

  The cavity surface 58 of the movable mold 62 for forming the base material layer is provided with a protrusion 69 that closes the gate for forming the surface layer when the base material layer 65 is formed. For this reason, when the base material layer 65 is formed, the molten resin does not flow back to the second injection device 10B via the flow path. Further, a flow path (hole) for forming a surface layer on the base material layer 65 by the protrusion 69 is provided. Then, when the surface layer 66 is formed, the molten resin is filled into the cavity through the flow path (hole) provided in the base material layer 65.

A molding process using a mold in which the movable mold rotates will be described below with reference to FIGS. 4 (a) and 4 (b).
In FIG. 4A, the movable mold 62 and the fixed mold 61 are closed to form a base material layer forming cavity, and the screw 12A of the first injection apparatus 10A for forming the base material layer is advanced to advance the base. A state in which the material layer 65 is formed is shown. When the base material layer 65 is formed, the gate portion of the surface layer is closed by the protrusion 69 that closes the gate, so that the injection-filled molten resin flows back to the second injection device 10B side for forming the surface layer. There is nothing. In the second injection device 10B, a predetermined amount of molten resin for forming the surface layer can be stored.

FIG. 4B shows a state in which the movable plate 52 is opened by a predetermined size and the intermediate plate 5 is rotated with the base material layer 65 left on the fixed die 61 after a predetermined cooling time has passed, and the surface layer forming step is performed. The state where the cavity 67 of the movable mold 62 is opposed to the fixed mold 61 and the mold is closed again, and the surface layer 66 is formed in the cavity formed between the surface of the cavity for the surface layer and the base material layer 65 is shown. Yes. Thereby, the base material layer 65 and the surface layer 66 are laminated | stacked and the laminated molded product which was integrated can be obtained.
Then, after a predetermined cooling time has elapsed, the mold is opened, and the molded product is taken out of the mold, thereby completing the molding. By repeating the above-described operation, a molded product can be obtained continuously.

An embodiment in which the surface layer and the base material layer are filled substantially simultaneously will be described with reference to FIGS. 5 (a) and 5 (b).
The mold 70 shown in FIGS. 5A and 5B is slidably attached to a fixed mold 71 attached to a fixed plate of a mold clamping device (not shown) and also to a movable plate (not shown). Basically constituted by the movable mold 72. The fixed mold 71 is provided with a resin flow path that allows the nozzle 16 and the cavity to communicate with each other and allows the surface layer and the base material layer to flow.
The nozzle 16 has a double structure and has a structure in which resin flow paths are arranged concentrically and the molten resin fed from the injection devices 10A and 10B can be filled into the mold cavity almost simultaneously. As shown in the figure, during simultaneous filling, the molten resin of the base material layer flows concentrically within the molten resin of the surface layer.

While the mold is closed, the surface layer and base material layer are filled almost simultaneously to obtain a laminated molded product with a sandwich structure. However, when filling with molten resin, the movable mold is retracted by the pressure of the resin and filling is completed. A configuration in which the mold is closed again (injection compression molding) or a configuration in which the mold is opened in advance by a predetermined dimension and filled with molten resin and the mold is closed after completion of filling (injection press molding) may be used.
The mold 70 has a half-push structure having a fitting part (inlay part). However, if the movable mold is not moved during the filling of the resin, a flat push structure having no fitting part may be used. good.

A molding process for obtaining a laminated molded product having a sandwich structure will be described below with reference to FIGS.
In FIG. 5A, the movable mold 72 and the fixed mold 71 are closed to form a cavity of a molded product, the molten resin of the surface layer 76 is filled in advance with the molten resin of the base layer 75, and then the base A state in which the molten resin of the material layer 75 is filled in the molten resin of the surface layer 76 is shown. The molten resin delivered from the injection devices 10A and 10B is supplied to the cavity through the resin flow path of the nozzle 16 and the fixed mold 71 without being mixed.

  FIG. 5B shows a state in which the molten resin of the surface layer 76 and the base material layer 76 has been filled, and a molded article having a sandwich structure having the base material layer 75 inside the surface layer 76 is obtained. Then, after a predetermined cooling time has elapsed, the mold is opened, and the molded product is taken out of the mold, thereby completing the molding. By repeating the resin weighing operation, the mold closing operation, and the injection operation, a molded product can be obtained continuously.

As described above, the fiber reinforced resin single-layer molded product obtained by the conventional molding method is such that the fibers near the surface of the molded product are oriented in the flow direction of the resin, and the thickness direction is at the center of the molded product in the thickness direction. Oriented to Therefore, the required product strength cannot be obtained. For this reason, when it was going to obtain the intensity | strength of a molded article by laminating | stacking the molten resin containing a fiber in two layers or a multilayer, there existed a problem that the surface property of a molded article fell.
In the molding method of the present invention, an optimum fiber blending ratio can be arbitrarily obtained in consideration of the rigidity, surface property and deformation (warpage) of the molded product. Then, the two layers to be laminated, that is, the fiber blending ratio (weight content) of the resin molding material used for each of the surface layer and the base material layer is changed (the fiber content of the surface layer is made smaller than that of the base material layer). As a result, it was possible to obtain a laminated product of fiber reinforced resin having improved strength and surface smoothly.

10A 1st injection device 10B 2nd injection device 23 Mold cavity 25, 55, 65, 75 Base material layer 26, 56, 66, 76 Surface layer 35A Mixing means

Claims (10)

Resin with a fiber material using a first injection device that fills a molten resin containing a fiber material and molds a base material layer, and a second injection device that fills the molten resin containing a fiber material and shapes a surface layer In the laminate molding method of fiber reinforced resin for laminating the surface layer on the base material layer,
The resin molding material used for the first and second injection devices was directly mixed with a predetermined amount of resin pellets, the fiber material, and a plurality of additives immediately before molding a laminated molded product. A fiber-reinforced resin laminate molding method in which the base material layer and the surface layer have different fiber material mixing ratios (weight contents).   The method for laminating and forming a fiber reinforced resin according to claim 1, wherein when the base material layer and the surface layer are formed, the surface layer is filled after the base material layer is filled.   The method for laminating and forming a fiber reinforced resin according to claim 1, wherein the base layer and the surface layer are filled substantially simultaneously when the surface layer and the base layer are formed.   The composition ratio (weight content) of the fiber material forming the surface layer is set to a value smaller than the composition ratio (weight content ratio) of the fiber material forming the base material layer. A method for laminating a fiber-reinforced resin as described.   The fiber-reinforced resin laminate molding method according to any one of claims 1 to 4, wherein the fiber material is selected from a group of glass fibers, carbon fibers, and organic fibers.   The fiber reinforced resin laminate molding method according to any one of claims 1 to 5, wherein a blending ratio (weight content) of the fiber material is 5 to 60% by weight.   The fiber-reinforced resin laminate molding method according to any one of claims 1 to 6, wherein a length of the fiber material used for the resin molding material is 5 to 1000 times a fiber bundle diameter.   The plurality of additives to be supplied to the resin molding material are selected from a plurality of modifiers, colorants, fillers, antistatic agents, lubricants, stabilizers, flame retardants, surfactants, and the like. A method for laminating and forming a fiber reinforced resin according to claim 7. The mold cavity was filled with a molten resin containing a fiber material to be a base material layer, and then filled with a molten resin containing a fiber material to be a surface layer after completion of filling the base material layer, and the surface layer was laminated on the base material layer In laminated molded products,
In the resin molding material of the laminate, a predetermined amount of resin pellets, a fiber material, and a plurality of additives directly mixed immediately before molding the laminate molded product are used.
The resin molding material of the base material layer and the surface layer is made into a blending ratio (weight content) of different fiber materials, and the base material layer is molded with the blending rate (weight content) of the fiber material forming the surface layer. Laminated molded product of fiber reinforced resin with a value smaller than the blending ratio (weight content) of the fiber material. In a laminated molded product in which a molten resin containing a fiber material as a surface layer in a mold cavity and a molten resin containing a fiber material as a base material layer are filled almost simultaneously, and the surface layer is laminated on the base material layer,
In the resin molding material of the laminate, a predetermined amount of resin pellets, a fiber material, and a plurality of additives directly mixed immediately before molding the laminate molded product are used.
The resin molding materials of the base material layer and the surface layer are made into different fiber material blending ratios (weight content ratios), and the fiber material molding ratio (weight content ratio) for molding the surface layer is molded into the base material layer. A laminated product of fiber reinforced resin having a value smaller than the mixing ratio (weight content) of the fiber material to be processed.

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