JP2008049602A - Method for manufacturing multilayered molded article and multilayered molded article obtained by it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technique for advantageously manufacturing a multilayered molded article which is beautiful like an inlaid work and is rich in high class feeling. <P>SOLUTION: After a surface skin material 12 is formed on the surface of a resin film 16 by fixing a decorative material 24 smaller than it, in a molding cavity 46 with a cavity face 42 at least one part of which is made to be a flat part 44, the surface skin material 12 is stored and arranged under a condition that a part containing the surface of the decorative material 24 and the surface of the decorative material surrounding part 26 of the resin film 16 surrounding it, out of the surface of the surface skin material 12, is brought into contact with or faced to the flat part 44 of the cavity face 42. Thereafter, a resin material 54 providing a base material is injected and filling the molding cavity 46 to mold the multilayered molde article to be a target. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a method for producing a multilayer molded product and a multilayer molded product obtained thereby, and in particular, a substrate made of a resin material is integrally laminated on the back surface of a resin film, The present invention relates to an advantageous production method of a multilayer molded article to which a decorating material is fixed, and a multilayer molded article obtained thereby.

  Conventionally, a multi-layer molded product in which a base material made of a resin material is integrally laminated by injection molding on the back surface of a resin film to which a predetermined design has been applied is a design panel of various apparatuses and facilities, etc. For example, in automobiles and the like, it has been widely used as interior panels such as console upper panels, radio case covers, and instrument panels.

  And when manufacturing such a multilayer molded product, first, as a resin film, first, it is shape | molded in the shape corresponding to the surface shape of the target multilayer molded product, and if needed, one side A pattern in which various patterns representing a desired design are printed on the entire surface by, for example, a known printing method is prepared. Next, after the resin film is set in a molding cavity formed in an injection mold, a predetermined resin material is injected and filled in the molding cavity in a molten state. Thereafter, the resin material in the molding cavity is cooled and solidified, whereby the base material is integrally laminated on the back surface of the resin film. Thus, the multilayer molded product having the above-described structure is conventionally manufactured by using a so-called film-in-mold molding technique (for example, see Patent Document 1 below).

  By the way, in such a multilayer molded product, for the purpose of further improving the design and improving the usability, the surface is given a pattern or design smaller than that, or a character, a mark, etc. Some of them are decorated. Many of the multilayer molded products whose surfaces are partially decorated are formed by film-in-mold molding, which is made of a member separate from the resin film and is smaller than the surface of the resin film. It is manufactured by adhering to a predetermined part of the surface of the product.

  However, when producing a multilayer molded product whose surface is partially decorated by such a conventional technique, a positioning recess is usually provided on the surface of the film-in-mold molded product, and the decorative material However, since it is fixed in such a state that it is fitted or accommodated in the positioning recess, it is between the outer peripheral surface of the decorative material and the inner peripheral surface of the positioning recess on the surface of the multilayer molded product finally obtained. It was inevitable that fine gaps were formed. In addition, when a decorative material is fixed to the surface of a film-in-mold molded product without forming a positioning recess, no fine gaps are formed around the decorative material, but the target multilayer molded product A step according to the thickness of the decorative material is inevitably formed between the surface and the decorative material.

  For this reason, in a multilayer molded product with a partially decorated surface manufactured by such a conventional method, for example, an article different from the material is placed in a gap provided in a predetermined material surface. It has never been possible to obtain a beautiful and high-quality impression such as a craftwork obtained by so-called inlay work that is inserted without any difference in level.

  In addition, a part of the method of obtaining a composite molded product with a partially decorated surface by performing film-in-mold molding using a resin film having a decorative layer printed on a part of the surface in advance It is adopted in. According to such a method, unlike the above-described method of fixing the decorating material to the surface of the resin film, the step between the decorating layer and the surface of the resin film can be substantially eliminated. However, as is well known, in order to make the boundary between the printing layer and the printing surface formed on a predetermined printing surface beautiful, a minute groove for parting off is formed around the printing layer. Therefore, even when the decorative layer is printed on the surface of the resin film, the gap (groove) formed around the decorative layer cannot be omitted. Thus, it is impossible to obtain an excellent impression such as an inlay product in a composite molded product that is obtained.

Japanese Patent Laid-Open No. 9-109179

  Here, the present invention was made in the background as described above, and the problem to be solved is that a decorative material smaller than that is fixed to the surface of the resin film, A multi-layer molded product in which a base material made of a resin material is integrally laminated on the back surface of a resin film by injection molding can give a beautiful and high-quality impression like an inlay product. An object of the present invention is to provide a method that can be manufactured with a structure and a multilayer molded article having such an excellent impression.

  And in the present invention, in order to solve the problems relating to the method for producing a multilayer molded article, the gist is that a decorating material smaller than the surface is fixed to the surface of the resin film. On the other hand, it is a method for producing a multilayer molded product in which a base material made of a resin material is integrally laminated by injection molding on the back surface of the resin film, and (a) the resin film and the decorative material And (b) a step of fixing the decorating material to the surface of the resin film to form a skin material, and (c) a cavity surface at least part of which is a smooth portion. In the molding cavity having the skin material, the surface material includes at least the surface of the decorative material and the surface of the decorative material surrounding portion of the resin film surrounding the decorative material. The part in contact with the smooth part of the cavity surface. Or a step of placing the skin material in a state in which the back surface of the skin material is exposed in the molding cavity, and (d) injecting and filling the resin material that gives the base material into the molding cavity. A step of bringing the entire surface portion of the skin material into close contact with the smooth portion of the cavity surface by the injection pressure of the resin material, and integrally laminating the base material on the back surface of the skin material; In the manufacturing method of the multilayer molded article characterized by including.

  In addition, according to one of the preferable aspects of the manufacturing method of the multilayer molded product according to this invention, the said resin film is formed using a thermoplastic resin material.

  Moreover, according to another desirable aspect of the method for producing a multilayer molded article according to the present invention, a positioning recess is provided on the surface of the resin film, and the decorating material is accommodated in the positioning recess. In this state, it is fixed.

  In addition, in order to solve the problems relating to the multilayer molded article, the present invention is such that a decorating material smaller than the surface is fixed to the surface of the resin film, while the back surface of the resin film is made of a resin material. The base material is a multi-layer molded product that is integrally laminated by injection molding, and a multi-layer molded product manufactured by the manufacturing method described above is also the gist thereof It is.

  The present invention can be suitably implemented in various aspects as listed above in order to solve the problems described above or the problems grasped from the description of the entire specification and the drawings. Each aspect described above can be employed in any combination. It should be noted that the aspects or technical features of the present invention are not limited to those described above, and can be recognized based on the description of the entire specification and the inventive concept disclosed in the drawings. Should be understood.

  That is, in the method for producing a multilayer molded product according to the present invention, the resin material is injected into the molding cavity in a state where the skin material in which the decorating material is fixed to the surface of the resin film is accommodated in the molding cavity. When filled, a pressing force based on the injection pressure is applied to the skin material from the back side thereof, whereby the surface of the decorating material and the decorating material of the resin film surrounding the decorating material The surface portion of the skin material including the surface of the surrounding portion is brought into intimate contact with the smooth portion of the cavity surface in the molding cavity by the injection pressure. For this reason, for example, in the prepared skin material, even if a step is formed between the surface of the decorative material and the surface of the decorative material surrounding portion of the resin film, the base material is integrated with the back surface of the skin material. After being laminated, such a step is effectively eliminated, so that the surface of the decorative material and the surface of the decorative material surrounding portion of the resin film are flush with each other on the surface of the skin material. Can be done.

  In addition, a skin material is prepared in which the decorative material is fixed in a state where the decorative material is fitted or accommodated in a positioning recess provided on the surface of the resin film, and the outer peripheral surface of the decorative material in the skin material is prepared. Even if a minute gap is formed between the inner surface of the positioning recess and the inner surface of the positioning recess, the pressing force is based on the injection pressure applied to the back surface of the skin material during injection molding of the base material to the back surface of the skin material. Thus, the resin film is pressed evenly from the back side thereof, and the inner peripheral surface of the positioning recess is brought into close contact with the outer peripheral surface of the decorating material, so that the gap between the decorating material and the positioning recess is Can be advantageously eliminated.

  Therefore, in such a technique of the present invention, a base material made of a resin material is integrally laminated on the back surface of the resin film, while a decorative material is provided in the recess provided on the surface of the resin film. In addition, it can be fixed in a state in which it is fitted exactly without gaps or steps.

  Therefore, according to the method for producing a multilayer molded product according to the present invention as described above, a target multilayer molded product in which a decorating material smaller than that is fixed to the surface of a resin film is a conventional film. It can be manufactured very advantageously with a beautiful and high-quality impression such as an inlay product that cannot be obtained by the method using in-mold molding.

  Further, in the multilayer molded product according to the present invention manufactured by such a manufacturing method, further improvement in designability and improvement in a high-class feeling can be advantageously achieved, and thereby, for example, a high-quality feeling is insufficient. Therefore, it can be widely used for applications that are difficult to use.

  Hereinafter, in order to clarify the present invention more specifically, an embodiment of the present invention will be described in detail with reference to the drawings.

  First, in FIG. 1 and FIG. 2, as an example of a multilayer molded product manufactured according to the method of the present invention, a cover panel (cover) of a storage box, which is a kind of automobile interior parts, has a front form and a longitudinal sectional form. And are shown schematically. As is clear from these drawings, the cover panel 10 integrally has a skin material 12 constituting the surface side portion and a base material 14 constituting the back side portion.

  And the skin material 12 further has the resin film 16 which exhibits the substantially thin rectangular housing | casing shape as a whole. As shown in FIG. 3, the resin film 16 has a predetermined pattern (on the entire surface of one surface of the base layer 18 formed using a transparent synthetic resin material having thermoplasticity such as acrylic resin, for example. For example, a print layer 20 having a wood grain pattern or the like is configured as a laminate formed by printing by a known printing method. As described above, the surface of the resin film 16, that is, the surface of the cover panel 10 is constituted by the acrylic resin base layer 18, so that the weather resistance and impact resistance of the surface of the cover panel 10 are enhanced. The surface of the cover panel 10 is difficult to be wrinkled.

  Further, as shown in FIGS. 1 and 2, the surface of the substantially central portion of the resin film 16 made of such a laminate (the surface opposite to the printed layer 20 side of the base layer 18) has an elongated rectangular shape. The positioning recess 22 is formed to have a bottom portion protruding at a predetermined height on the back surface side. That is, the positioning recess 22 has a shape in which the substantially central portion of the resin film 16 is recessed so as to protrude toward the back side without being thinned, and the thickness of each of the bottom portion and the side wall portion is The thickness of the resin film 16 is substantially the same as that of the portion other than the portion where the positioning recess 22 is formed.

  In the positioning recess 22 of the resin film 16, a decorating material 24 made of an elongated rectangular aluminum piece corresponding to the inner peripheral surface shape is positioned, and the surface of the resin film 16 is tightly fitted with no gap. The resin film 16 is fitted and fixed in a state where it is flush with the surface of the resin film 16.

  Thus, here, the skin material 12 is configured as a resin molded body in which the decorating material 24 is fixed to the surface of the resin film 16. Then, a wood grain pattern is given to the entire surface of the skin material 12 by the printing layer 20 formed on the entire back surface of the transparent base layer 18 constituting the resin film 16, and the skin material 12 A predetermined mark is given to a part of the surface by a decorating material 24 smaller than the surface of the resin film 16.

  On the other hand, the base material 14 constituting the back side portion of the cover panel 10 as a whole has a rectangular casing shape that is thicker than the skin material 12 and slightly smaller than that. Here, the skin material 12 is formed using a thermoplastic resin material having a melting point lower than that of the acrylic resin constituting the base layer 18 of the skin material 12, such as ABS resin.

  Such a base material 14 is integrally laminated on the entire back surface of the skin material 12, and thus the cover panel 10 is integrated with the skin material 12 and the base material 14. It is configured as a laminated product.

  By the way, the cover panel 10 having such a structure is manufactured, for example, according to the following procedure.

  That is, first, the resin film 16 and the decorating material 24 are respectively prepared. Here, as shown in FIG. 3 and FIG. 4, as the resin film 16, a base layer 18 made of a thermoplastic resin such as an acrylic resin, and a print showing a grain pattern printed on the entire surface of the base layer 18. A layer 20 is prepared which has a generally thin rectangular housing shape and is provided with an elongated rectangular positioning recess 22 at a substantially central portion of the surface. On the other hand, as the decorating material 24, an aluminum piece having a shape slightly smaller than the inner shape of the positioning recess 22 and a thickness slightly larger than the depth of the positioning recess 22 is prepared.

  The resin film 16 may be formed by, for example, performing pressure molding or vacuum molding on a thin rectangular plate-shaped raw material film made of a thermoplastic resin material (here, acrylic resin) that gives the resin film 16, or such a thermoplastic resin. By performing stamping molding using a material or the like, the printing layer 20 is easily formed on the base layer 18 formed so as to have the positioning recess 22 by, for example, a screen printing method. Will be.

  Next, as shown in FIG. 5, the decorating material 24 is accommodated and positioned in the positioning recess 22 of the resin film 16 prepared as described above, and the bottom surface of the positioning recess 22. On the other hand, it is fixed by adhesion using an adhesive. Thereby, the skin material 12 is formed.

  In addition, in the skin material 12 formed in this way, since the size of the decorating material 24 is slightly smaller than the positioning recess 22, as shown in FIG. 6, A slight gap 25 is formed between the positioning recess 22 and the side surface (inner peripheral surface) so as to continuously extend over the entire circumference. Further, since the thickness of the decorating material 24 is slightly larger than the depth of the positioning recess 22, the surface portion of the decorating material 24 that is accommodated and fixed in the positioning recess 22 extends over the entire surface. Thus, it is projected from the positioning recess 22 by a slight height. Thereby, in the skin material 12, a slight height difference D is formed between the surface of the decorating material 24 and the surface of the decorating material surrounding portion 26 surrounding the positioning recess 22.

  Further, while the skin material 12 is thus formed, for example, an injection mold 27 having a known structure as shown in FIG. 7 is prepared. The injection molding die 27 is attached to a fixed die 30 attached to a fixed plate 28 with a fixed position, and a movable plate 32 that can move toward and away from the fixed plate 28. And a movable mold 34 arranged opposite to each other.

  In addition, a substantially rectangular cavity forming convex part 36 is integrally provided on the surface of the injection mold 27 facing the movable mold 34 of the fixed mold 30, and the cavity forming convex part 36 is provided. The entire outer surface is a fixed mold side cavity surface 38 having a shape corresponding to the inner surface shape of the target cover panel 10. On the other hand, on the surface of the movable die 34 facing the fixed die 30, a cavity forming convex portion 36 can be inserted, and a cavity forming concave portion 40 comprising a rectangular recess having a size slightly larger than that is provided. . The entire inner surface of the cavity forming recess 40 is a movable mold side cavity surface 42 having a shape corresponding to the target outer surface shape of the cover panel 10, and of the movable mold side cavity surface 42. A portion made of the bottom surface of the cavity forming recess 40 is a smooth portion 44 made of a smooth surface.

  Thus, in such an injection molding die 27, the cavity forming convex portion 36 becomes the cavity forming concave portion 40 by closing the fixed die 30 and the movable die 34 as the movable plate 32 moves toward the fixed plate 28. The molding cavity (46) corresponding to the outer shape of the target cover panel 10 is formed between the fixed mold side cavity surface 38 and the movable mold side cavity surface 42 by being inserted into the inside. (See FIG. 9).

  In such an injection molding die 27, a sprue bush 48 is provided on the stationary platen 28 so that a nozzle of an injection molding machine (not shown) is brought into contact with the stationary die 30. A sub sprue 52 is formed in communication with the sprue 50 and opening in the fixed mold side cavity surface 38 of the cavity forming convex portion 36. As a result, the synthetic resin material injected from the nozzle of the injection molding machine (not shown) under the condition that the fixed mold 30 and the movable mold 34 are closed and the molding cavity (46) is formed is formed by the sprue 50 and the sub sprue. 52 can be guided into the molding cavity (46) (see FIG. 11).

  When the injection mold 27 having such a structure is prepared, as shown in FIG. 8, the skin material 12 is made of the movable mold 34 with the fixed mold 30 and the movable mold 34 open. It is set in the cavity forming recess 40. Thereafter, as shown in FIG. 9, the fixed mold 30 and the movable mold 34 are closed so that the fixed mold side cavity surface 38 of the cavity forming convex portion 36 and the movable mold side cavity surface 42 of the cavity forming concave portion 40 are obtained. In this state, the molding cavity 46 is formed, and the skin 12 is exposed in the molding cavity 46 with the back surface facing the fixed mold side cavity surface 38 in the molding cavity 46. , Housed and arranged.

  As described above, the surface portion of the decorating material 24 fixed in the positioning recess 22 of the resin film 16 is protruded from the positioning recess 22 over the entire surface, so that the decorating material 24 A step: D is formed between the surface and the surface of the decorative material surrounding portion 26. Therefore, when the skin material 12 is accommodated and disposed in the molding cavity 46 in this step, as is apparent from FIGS. 9 and 10, the smooth portion 44 on the movable mold side cavity surface 42 of the cavity forming recess 40 is used. Thus, the surface of the skin material 12 (the surface opposite to the side on which the printing layer 20 is formed) is positioned so as to be in partial contact with or opposite to the surface.

  That is, of the surface of the skin material 12, the entire surface of the decorative material 24 fixed in the positioning recess 22 (the surface opposite to the fixing side to the bottom surface of the positioning recess 22) is the movable cavity surface. It comes to be brought into contact with the smoothing portion 44 of 42. Further, the surface of the decorative material surrounding portion 26 in the skin material 12, in other words, the surface of the resin film 16 other than the positioning recess 22 forming portion of the rectangular casing-shaped top plate portion is the movable side cavity. The smooth portion 44 of the surface 42 is opposed to the smooth portion 44 with a slight distance corresponding to the height of the step D. In addition, even under such a housing arrangement state of the skin material 12 in the molding cavity 46, the outer peripheral surface of the decorative material 24 and the side surface of the positioning concave portion 22 are fixed by the fixing of the decorative material 24 in the positioning concave portion 22. The gap 25 formed between the two is maintained as it is.

  Furthermore, in this step, in the state where the skin material 12 is accommodated and disposed in the molding cavity 46, the surface portion of the side wall portion of the rectangular housing shape in the resin film 16 of the surface of the skin material 12 extends over the entire circumference. The movable mold side cavity surface 42 constituting the side surface of the cavity forming recess 40 is disposed so as to come into contact with the cavity forming recess 40. Accordingly, as will be described later, when the resin material is injected into the molding cavity 46, the resin material can be prevented from wrapping around the surface side of the skin material 12.

  Then, when the skin material 12 is accommodated in the molding cavity 46, as shown in FIG. 11, for example, a thermoplastic resin (here, ABS resin is lower in melting point than the resin film 16 of the skin material 12). Used) is injected into the molding cavity 46 with a predetermined injection pressure from the nozzle of an injection molding machine (not shown) through the sprue 50 and the sub sprue 52, and the fixed mold side in the molding cavity 46 is injected. It is filled between the cavity surface 38 and the back surface of the skin material 12 accommodated in the molding cavity 46.

  At this time, the resin film 16 of the skin material 12 is heated and softened by contact with the high-temperature molten resin 54, and against the back surface of the skin material 12 under the softened state of the resin film 16. Thus, a pressing force based on the injection pressure of the molten resin 54 is applied, and the back surface of the skin material 12 is pressed substantially uniformly toward the movable mold side cavity surface 42 side. Thereby, the skin material 12 is plastically deformed, and the surface of the decorative material surrounding portion 26 of the skin material 12 is brought into close contact with the smooth portion 44 of the movable cavity surface 42 as shown in FIG. The step: D disappears, and the entire side surface of the positioning recess 22 is brought into intimate contact with the entire outer peripheral surface of the decorating material 24, and the gap 25 between them is completely eliminated. Thus, the decorating material 24 is fitted into the positioning recess 22 without any gap, and the surface is flush with the surface of the decorating material surrounding portion 26.

  In such a state, when a predetermined time elapses, the molten resin 54 in the molding cavity 46 is cooled and solidified, whereby the base material (14) is integrated with the entire back surface of the skin material 12. Thus, an integral laminated molded product (multilayer molded product) of the skin material 12 and the base material (14) is formed. Thereafter, the fixed mold 30 and the movable mold 34 are opened, and the laminated molded product is released, so that the target cover panel 10 having the structure shown in FIGS. 1 and 2 is formed. It will be obtained.

  Thus, in this embodiment, in the skin material 12 before the base material 14 is formed on the back surface, a minute gap 25 is formed between the side surface of the positioning recess 22 and the outer peripheral surface of the decorating material 24. At the same time, although the step: D is present between the surface of the decorating material 24 and the surface of the decorating material surrounding portion 26 in the resin film 16, the skin material 12 is simply placed in the molding cavity 46. In a state of being housed and arranged at a predetermined position, the gap 25 and the step: D are eliminated only by performing general injection molding (film in-mold molding), and the decorative material 24 is placed in the positioning recess 22. Thus, the cover panel 10 that is fitted without gaps and in which the surface of the decorating material 24 and the surface of the decorating material surrounding portion 26 are flush with each other is manufactured.

  Therefore, according to this embodiment as described above, a beautiful and high-class impression such as an inlay product can be obtained without performing any special operation or extra work as compared with the case of performing the conventional film-in-mold forming method. The cover panel 10 with a rich impression can be manufactured very easily and advantageously. The cover panel 10 thus obtained can be widely applied to uses and the like that have been difficult to use in the past due to lack of luxury, for example.

  Moreover, in this embodiment, what was formed using thermoplastic resin materials, such as ABS resin, as the resin film 16 is used, and it is molten resin in the shaping | molding cavity 46 in which the skin material 12 was accommodated and arrange | positioned. When the resin 54 is injected, the resin film 16 is softened and can be easily plastically deformed, whereby the base material 14 is integrally laminated on the back surface of the skin material 12. At the same time, the gap 25 and the level difference D can be easily and more surely lost.

  Furthermore, in this embodiment, since the positioning recessed part 22 is provided in the surface of the resin film 16, and the decorating material 24 is firmly fixed in this positioning recessed part 22, the decorating material 24 is There exists an advantage that it can form reliably in the predetermined position of the cover panel 10 finally obtained.

  The specific configuration of the present invention has been described in detail above. However, this is merely an example, and the present invention is not limited by the above description.

  For example, in the said embodiment, the positioning recessed part 22 for positioning the decorating material 24 is formed in the surface of the resin film 16, and the decorating material 24 is accommodated in this positioning recessed part 22, Although it is fixed, there is no problem even if the positioning recess 22 is omitted and the decorating material 24 is fixed to the surface of the resin film 16. If the positioning recess 22 is omitted as described above, the structure of a mold or the like used when the resin film 16 is molded can be simplified, and the manufacturing facilities of the resin film 16 and, consequently, the cover panel 10 can be reduced. There exists an advantage that cost reduction etc. can be achieved advantageously.

  When the positioning recess 22 is omitted, the surface of the resin film 16 is deformed by the deformation of the skin material 12 (resin film 16) due to the injection pressure of the molten resin 54 into the molding cavity 46 in which the skin material 12 is accommodated. And the surface of the decorating material 24: The thickness and material of the resin film 16, the thickness of the decorating material 24, the magnitude of the injection pressure of the molten resin 54, etc. Will be set.

  Of course, the type, shape, thickness, and the like of the resin material constituting the resin film 16 and the substrate 14 are not particularly limited to those illustrated.

  Further, the resin film 16 only needs to have at least a base layer 18 made of a resin material. Therefore, the resin film 16 may be composed only of the base layer 18. In addition, two or more printing layers 20 are laminated on the base layer 18, or one or more resin layers different from the base layer 18 are laminated instead of or in addition to the printing layer 20. It may be.

  Furthermore, the material of the decorating material 24 is not limited to the illustrated material. For example, the decorating material 24 may be made of a resin material. In addition, among resin materials, when comprising the decorating material 24 using an acrylic resin, the weather resistance and impact resistance of the decorating material 24 surface are improved, and the surface of this decorating material 24 is hard to be wrinkled. The advantage that it becomes becomes. In addition, the decoration material 24 may be formed of a multilayer product in which a plurality of resin layers are integrally laminated, or a composite material formed using different types of materials such as a resin material and a metal material. It can also be constituted by a molded product.

  Furthermore, the shape and size of the decorating material 24 are not limited as long as they are smaller than the resin film 16.

  Moreover, in the said embodiment, the surface of the decorating material surrounding part 26 in the resin film 16 (skin material 12) is the smooth part of the movable mold | type side cavity surface 42 in the arrangement | positioning state in the shaping | molding cavity 46 of the skin material 12. However, the surface of the decorative material surrounding portion 26 and the smooth portion 44 may be brought into contact with each other. Further, the surface of the decorative material 24 may be opposed to the smooth portion 44 with a slight distance.

  Furthermore, the overall shape and formation position of the smooth portion 44 can be appropriately changed depending on the shape of the cover panel 10 as a multilayer molded product finally obtained.

  Furthermore, in the above-described embodiment, when the cover panel 10 is manufactured as a target multilayer molded product, the fixed mold 30 provided with the cavity forming convex part 36 and the movable mold 34 provided with the cavity forming concave part 40 are provided. However, instead of the injection mold 27 having such a structure, a fixed mold 30 provided with a cavity forming concave portion 40 and a cavity forming convex portion 36 are used. It is also possible to use an injection mold 27 having a movable mold 34 provided.

  In addition, in the said embodiment, although the specific example of what applied this invention to the cover panel of the storage box which is a kind of interior component for motor vehicles, and its manufacturing method was shown, this invention is the other interior component for motor vehicles, Of course, the present invention can be advantageously applied to any of the multilayered products constituting the parts or members other than the automobile interior parts and the manufacturing method thereof.

  In addition, although not enumerated one by one, the present invention can be carried out in a mode to which various changes, modifications, improvements, etc. are added based on the knowledge of those skilled in the art. It goes without saying that all are included in the scope of the present invention without departing from the spirit of the present invention.

It is front explanatory drawing which shows one Embodiment of the multilayer molded product which has a structure according to this invention. It is II-II sectional explanatory drawing in FIG. FIG. 3 is an enlarged explanatory view of a part III in FIG. 2. FIG. 2 is a longitudinal cross-sectional explanatory view showing a resin film prepared for manufacturing the multilayer molded article shown in FIG. 1 according to the present invention. It is explanatory drawing which shows the example of 1 process at the time of manufacturing the multilayer molded article shown by FIG. 1 according to this invention, Comprising: The decorating material was fixed to the resin film, and the state which formed the skin material is shown. Yes. FIG. 6 is an enlarged explanatory view of a VI part in FIG. 5. FIG. 2 is a longitudinal cross-sectional explanatory view showing an injection mold prepared for manufacturing the multilayer molded article shown in FIG. 1 according to the present invention. It is explanatory drawing which shows the example of a process implemented following FIG. 5, Comprising: The state which set the skin material with respect to the movable mold | type of the injection mold is shown. It is explanatory drawing which shows the example of a process implemented following FIG. 8, Comprising: While showing the state which accommodated and arrange | positioned the skin material in this shaping | molding cavity while closing the injection mold and forming a shaping | molding cavity ing. FIG. 10 is an enlarged explanatory view of a portion X in FIG. 9. It is explanatory drawing which shows the example of a process implemented following FIG. 9, Comprising: The state which injected and filled the molten resin in the shaping | molding cavity is shown. FIG. 12 is an enlarged explanatory view of a part XII in FIG. 11.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Cover panel 12 Skin material 14 Base material 16 Resin film 22 Positioning recessed part 24 Decorating material 25 Crevice 26 Decorating material surrounding part 27 Injection mold 42 Movable mold side cavity surface 44 Smooth part 46 Molding cavity

Claims (4)

A multi-layer molded product in which a decorating material smaller than the surface is fixed on the surface of the resin film, and a base material made of a resin material is integrally laminated on the back surface of the resin film by injection molding A manufacturing method of
Preparing each of the resin film and the decorating material;
A step of fixing the decorating material to the surface of the resin film to form a skin material;
The resin that encloses at least the surface of the decorating material and the decorating material out of the surface of the skin material by accommodating the skin material in a molding cavity having a cavity surface at least part of which is a smooth portion A step of placing a portion including the surface of the decorative material surrounding portion of the film in contact with or facing the smooth portion of the cavity surface and exposing the back surface of the skin material in the molding cavity; ,
Injecting and filling the resin material that gives the base material into the molding cavity, and by bringing the entire surface portion of the skin material into close contact with the smooth portion of the cavity surface by the injection pressure of the resin material, A step of integrally laminating the base material on the back surface of the skin material;
A method for producing a multilayer molded article comprising:   The method for producing a multilayer molded product according to claim 1, wherein the resin film is formed using a thermoplastic resin material.   The composite resin according to claim 1 or 2, wherein a positioning recess is provided on a surface of the resin film, and the decorative material is fixed in a state of being accommodated in the positioning recess. A method for producing a layered product. A multi-layer molded product in which a decorating material smaller than the surface is fixed on the surface of the resin film, and a base material made of a resin material is integrally laminated on the back surface of the resin film by injection molding A multilayer molded article produced by the production method according to any one of claims 1 to 3.

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