JP2005329544A - Two-color molded product and its molding method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a two-color molded product and its molding method and to enhance the appearance and precision of the joined part of the two-color molded product. <P>SOLUTION: A door trim (two-color molded product) 10 is constituted of a laminated structure (door trim upper) 20 comprising a resin base material 21 having a skin 22 laminated to the surface thereof and a resin single product (door trim lower) 30. A bent part 21a is formed to the resin base material 21 of the door trim upper 20 by using a single mold 40 to arrange a dividing mechanism part 50 on a lower mold 42 along the joined part of the door trim upper 20 and the door trim lower 30, and the bent part 21a and the resin single product 30 are abutted mutually in a boundary groove part 17 and bonded not only to enhance the joining strength of the joined part but also to improve appearance. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a two-color molded product that can be applied to automotive interior parts such as door trims, rear parcel shelves, floor trims, trunk trims, rear side trims, and the molding method thereof. The present invention relates to a two-color molded product and a molding method thereof.

  FIG. 12 is an exploded view showing the automotive door trim 1 having a vertically divided structure, and FIG. 13 is a cross-sectional view showing the configuration of the automotive door trim 1. In the drawing, an automotive door trim 1 includes a door trim upper 2 and a door trim lower 3. The door trim upper 2 is composed of a laminated structure in which a skin 2b is adhered to the surface of a resin core material 2a formed into a desired curved surface shape. The door trim upper 2 is formed with a resin core material 2a by a mold press molding method or a cold press molding method. The skin 2b is integrally formed.

  A method for forming the door trim upper 2 will be described with reference to FIG. First, a molding die 4 for molding the door trim upper 2 is connected to a molding upper die 5 that can move up and down by a predetermined stroke, a molding lower die 6 that is fixed to the molding upper die 5, and a molding lower die 6. The injection machine 7 is generally constituted.

  When the molding upper and lower molds 5 and 6 are clamped, a cavity portion 5a is formed in the molding upper die 5 and a core portion 6a is provided in the molding lower die 6 in order to shape the product shape of the door trim upper 2. ing. In order to move the molding upper mold 5 up and down by a predetermined stroke, an elevating cylinder 5b is connected, and the molding lower mold 6 is provided with a manifold 6b and a gate 6c that serve as a passage for the molten resin M from the injection machine 7. Further, in order to maintain an appropriate posture, the upper molding die 5 that moves up and down is provided with guide posts 6d at the four corners of the lower molding die 6, and the molding upper die 5 has guides corresponding to the guide posts 6d. A bush 5c is provided.

  Accordingly, when the molding upper and lower molds 5 and 6 are in the mold open state, the skin 2b is set in the molding die 4, and then either immediately before the molding upper and lower molds 5 and 6 are clamped or after the mold clamping. The molten resin M is injected and filled from the injection machine 7 through the manifold 6b and the gate 6c into the cavity between the molds 5 and 6 at such timing, thereby forming the resin core material 2a into a required curved surface shape and the resin. An outer skin 2b is integrally formed on the surface of the core material 2a (see, for example, Patent Document 1).

  In FIG. 14, for convenience of explanation, the molten resin M is supplied to the mold surface of the core portion 6 a in an open state, but actually, the molten resin M is injected into the cavity after the mold upper and lower molds 5 and 6 are clamped. It may be filled.

  On the other hand, the door trim lower 3 is formed of a synthetic resin injection-molded body, and is molded into a required shape by using an injection mold (not shown) separate from the molding mold 4 of the door trim upper 2.

  Next, the bonding structure of the door trim upper 2 and the door trim lower 3 is such that the welding bosses 3a are erected at appropriate pitch intervals along the bonding edge of the door trim lower 3, and the welding boss 3a corresponds to the door trim upper 2 Then, after inserting into the established mounting hole 2c, ultrasonic welding and caulking is applied to the tip of the welding boss 3a, thereby joining and integrating the door trim upper 2 and the door trim lower 3 ( For example, see Patent Document 2.)

Japanese Patent Laid-Open No. 10-138268 (Page 2, FIGS. 3 and 4)

JP 2001-198936 A (page 4, FIG. 8, FIG. 9)

  As described above, in the conventional automobile door trim 1 having a vertically divided structure, the door trim upper 2 and the door trim lower 3 are individually molded using separate molding dies, and then both are joined. It has been pointed out that the method of joining and integrating by ultrasonic welding is used, so that the number of steps is large, the cost of the molding die is increased, the cost is increased, and the productivity is lowered.

  Moreover, in the conventional joining structure, since the joining line of the door trim upper 2 and the door trim lower 3 is a mating structure in which a part is wrapped along the joining portion, the surface appearance is inferior and the dimensions are not stable. There was a problem that.

  The present invention has been made in view of such circumstances, and is a two-color molded article suitable for automotive interior parts such as a split door trim, and is a two-color molded with improved appearance and dimensional stability. The purpose is to provide goods.

  Furthermore, the present invention makes it possible to form the above two-color molded product with a single molding die, and to reduce the number of steps compared to the prior art, thereby enabling simple and inexpensive molding. It is a further object to provide a method for forming a color molded product.

  In order to solve the above-described problems, the present invention has at least two or more cavities set in a molding die, and injects and fills molten resin from an injection machine corresponding to each cavity, and joins a plurality of resin molded bodies. In the integrated two-color molded product, a boundary groove portion is set along the joint portion of both resin molded bodies, and a bent portion along the shape of the boundary groove portion is formed at the edge portion of the resin molded body on one side. The bent portion is abutted against the end edge portion of the resin molded body on the other side, and the dimension of the bent portion is set to 0.5 to 17 mm.

  Here, the two-color molded product is a plurality of resins having at least different appearances by setting at least two different cavities in a single mold and injecting and filling molten resin of different materials into each cavity. It refers to a molded product that is formed by joining and integrating molded bodies. A skin can be laminated and integrated on the surface of the resin molded body on one side.

  For example, the two-color molded product can be applied to automobile interior parts such as a door trim, a rear parcel shelf, a floor trim, a luggage trim, a trunk trim, and a rear side trim.

  The resin material of the resin molded body may be one type of thermoplastic resin or two or more types of thermoplastic resins. Preferably, polyethylene resin, polypropylene resin, polystyrene resin, polyacetal resin, polyethylene terephthalate resin, polyvinyl alcohol resin, polyamide resin, vinyl chloride resin, ionomer resin, acrylonitrile / butadiene / styrene (ABS) Resins, polycarbonate resins, and the like can be used, and various fillers may be mixed in these thermoplastic resins. Examples of the filler that can be used include inorganic fibers such as glass fiber and carbon fiber, and inorganic particles such as talc, clay, silica, and calcium carbonate. Moreover, various additives, such as antioxidant, a ultraviolet absorber, a coloring agent, a flame retardant, and a low shrinkage agent, may be mix | blended.

  Furthermore, the boundary groove part recessed in the product surface side is formed along the junction part of both resin moldings. And the bending part is formed in the edge part of the resin molding of one side so that it may enter in this boundary groove part, and the dimension of this bending part is set to 0.5-17 mm. If the dimension of the bent portion is less than 0.5 mm, the molten resin of the other side resin molding tends to leak to the cavity side of the one side resin molding, and the sealing function cannot be performed. On the other hand, when the dimension of the bent part exceeds 17 mm, the molten resin in the bent part becomes enormous, and it takes a long time for cooling, and leaks to the cavity side of the resin molded body on the other side, thereby reducing the molding accuracy. .

  Then, according to the two-color molded product according to the present invention, the bent portion is formed at the edge portion of the resin molded body on one side along the boundary groove between the resin molded bodies having different appearances. Since the resin molding on the other side is butt-joined to the edge of the curved portion, no resin leakage occurs during molding of the resin molding on the other side, and the appearance of the parting portion can be maintained well.

  Next, in the molding method of the two-color molded product according to the present invention, at least two or more cavities are set in the molding die, and a plurality of resin moldings are performed by injecting and filling molten resin from an injection machine corresponding to each cavity. In a molding method for two-color molded products that are formed by joining and integrating bodies, the mold is clamped, the molten resin is injected and filled into the first cavity, and the resin molded body on one side is molded into the required shape. In addition, it corresponds to the molding step of the resin molded body on one side that forms a bent portion that bends downward at the edge portion of the resin molded body, and the boundary between the first cavity and the second cavity. As described above, by lowering the dividing bar of the dividing mechanism portion provided in the molding lower mold, a space facing the bent portion of the resin molded body is formed so as to communicate with the second cavity, and the second Melt in the cavity and space of A step of molding the resin molding on the other side by injection-filling the fat, molding the resin molding on the other side into a required shape, and joining and integrating the two resin moldings to each other. To do.

  Here, the molding die used in this molding method is connected to a molding upper mold that can move up and down by a predetermined stroke, a molding lower mold that is a fixed side located below the molding upper mold, and a molding lower mold. And an dividing mechanism disposed in the lower mold.

  In the lower mold, a plurality of injection machines are set so as to correspond to at least two different cavities. Further, the dividing mechanism is supported by the drive cylinder so that the dividing bar can move up and down by a predetermined stroke.The dividing bar is positioned at the upper position when molding the resin molded body on one side, and when molding the resin molded body on the other side, The dividing bar descends by a predetermined stroke to form a space communicating with the cavity of the resin molding on the other side.

  According to the method of the present invention, a series of molding steps of operating the dividing mechanism and integrally molding a plurality of resin molded bodies can be performed with the same molding die. It can be simplified and the number of processes can be shortened.

  Furthermore, since the bent portion is set along the joint portion of the resin molded body on one side, a gap through which the resin leaks to the outside is not formed by the bent portion when molding the resin molded body on the other side. Therefore, the appearance of the parting part can be maintained well, and the material loss caused by the resin leakage can be prevented.

  As described above, in the two-color molded product according to the present invention, a bent portion is formed at the edge of the resin molded body on one side along a joint portion that joins a plurality of resin molded bodies having different appearances. Adopting a structure in which this bent part and the resin molded body on the other side are abutted and joined in the boundary groove, so that the appearance of the joined part can be maintained well, and the alignment accuracy and joining strength are improved. Since it can be carried out easily and inexpensively as compared with the mating structure, it has the effect of improving productivity.

  Further, since the two-color molded product molding method according to the present invention can manufacture a plurality of resin molded bodies in a series of steps with a single molding die, it has been conventionally molded individually with separate molding dies. In addition, there is an effect that the die equipment can be simplified and the number of steps can be shortened without requiring a large number of steps of performing ultrasonic welding caulking after pin joining.

  Hereinafter, preferred embodiments of a two-color molded product and a molding method thereof according to the present invention will be described by exemplifying an upper and lower split type automobile door trim and a molding method thereof.

  1 to 11 show an embodiment of the present invention, FIG. 1 is a front view showing a two-tone type automobile door trim, FIG. 2 is a sectional view showing the configuration of the door trim for the automobile, and FIG. 3 is a door trim for the automobile. FIG. 4 and FIG. 5 show a molding die for molding the automobile door trim, FIG. 4 is an overall view of the molding die, and FIG. 5 is a division in the molding die. FIG. 6 to FIG. 10 are explanatory diagrams of steps in the method for manufacturing the automobile door trim, and FIG. 11 is an explanatory view showing a modification of the boundary groove of the automobile door trim.

  One embodiment of the present invention will be described with reference to FIGS. 1 and 2, a two-tone type automobile door trim 10 is composed of an upper and lower divided body of a door trim upper 20 made of a laminated structure and a door trim lower 30 made of a single resin product. As functional components to be mounted on the door trim 10, an inside handle escutcheon 11 and a power window switch escutcheon 12 are attached to the door trim upper 20. On the other hand, the door trim lower 30 is provided with a door pocket opening 13, and a pocket back cover (made of a resin molded body) 14 is attached to the rear side of the door trim lower 30, as shown in FIG. A speaker grill 15 is formed integrally or separately on the front side of the.

  By the way, the automotive door trim 10 according to the present invention is characterized in that the appearance and alignment accuracy of the joint portion between the door trim upper 20 and the door trim lower 30 is improved, the number of processes is reduced, and the mold equipment is simplified. is there. That is, as shown in FIG. 2, the door trim upper 20 is molded into a desired curved surface shape and has a resin base material 21 having shape retention, and a decoration function that is laminated and integrated on the surface side of the resin base material 21. The skin 22 is generally composed of. In the figure, reference numeral 16 denotes a vehicle body panel.

  Examples of the thermoplastic resin used as the material of the resin base material 21 include polyethylene resins, polypropylene resins, polystyrene resins, polyacetal resins, polyethylene terephthalate resins, polyvinyl alcohol resins, polyamide resins, vinyl chloride resins, Ionomer resins, acrylonitrile / butadiene / styrene (ABS) resins, polycarbonate resins, and the like can be used. In the thermoplastic resin, fillers such as inorganic fibers such as glass fibers and carbon fibers, talc, clay, silica, Fillers such as inorganic particles such as calcium carbonate may be mixed.

  As described above, the door trim 10 shown in FIGS. 1 to 3 includes the door trim upper 20 formed of a laminated structure and the door trim lower 30 of a single resin, and has an excellent appearance design due to an accent effect on the appearance. I have. For the skin 22, a synthetic resin sheet such as a vinyl chloride sheet or a TPO sheet, a synthetic resin film, or a foam can be used. Further, when using a breathable sheet such as a woven fabric, a nonwoven fabric, or a knitted fabric, the resin can be prevented from seeping out at the time of molding if the back surface is lined with a non-breathable backing sheet or backing foam. If a TPO sheet or a TPO sheet lined with a polyolefin resin foam such as polyethylene foam is used, if the polyolefin resin is used as the resin base material 21, the entire material can be unified with the olefin resin material. Is advantageous.

  Further, the door trim 10 to which the present invention is applied has a boundary groove portion 17 set along a joint portion between the door trim upper 20 and the door trim lower 30, and the resin base material 21 laminated with the skin 22 has an edge portion thereof. Is formed as a bent portion 21 a that enters the boundary groove portion 17, and the end edge portion 30 a of the door trim lower 30 and the bent portion 21 a are abutted and joined in the boundary groove portion 17. is there. At this time, the dimension of the bent part 21a (the dimension from the back surface of the door trim upper 20 to the end of the bent part 21a, indicated by A in FIG. 3) is set to 0.5 to 17 mm.

  If the dimension A of the bent portion 21a is less than 0.5 mm, the molten resin for molding the door trim lower 30 tends to leak to the cavity side of the door trim upper 20, and the sealing function cannot be performed. On the other hand, when the dimension A of the bent portion 21a exceeds 17 mm, the molten resin in the bent portion 21a becomes enormous, and it takes a long time for cooling. It tends to leak to the cavity side and reduce the molding accuracy. Reference numeral 31 in the figure denotes a reinforcing rib provided on the bottom wall of the groove portion 17 in order to increase the strength of the boundary groove portion 17.

  Therefore, in the molding method of the door trim 10 to be described later, there is no fear that the molten resin that is the material of the door trim lower 30 leaks to the product surface or back side through the bent portion 21a, and the molding performance and the product appearance can be maintained well.

  Next, a method for manufacturing the automobile door trim 10 will be described in detail with reference to FIGS. In FIG. 4, a molding die 40 used for molding the door trim 10 includes a molding upper mold 41 that can move up and down by a predetermined stroke, a molding lower mold 42 that is paired with the molding upper mold 41, and a molding lower mold 42. It consists of two injection machines 43a and 43b connected to each other. More specifically, the molding upper die 41 has a cavity portion 411 that matches the product shape, and is driven up and down by a predetermined stroke by an elevating cylinder 412 connected to the upper surface of the molding upper die 41. In addition, guide bushes 413 serving as a guide mechanism are provided at the four corners of the molding upper die 41.

  On the other hand, the molding lower die 42 is provided with a core portion 421 corresponding to the cavity portion 411 of the molding upper die 41. Further, in order to supply molten resin to the mold surface of the core portion 421, manifolds 422a and 422b and gates 423a and 423b are provided in the molding lower mold 42. Resins of the manifolds 422a and 422b and gates 423a and 423b are provided. In the first cavity 424 for forming the resin base material 21 of the door trim upper 20 in which the molten resins M1 and M2 supplied from the injection machines 43a and 43b through the passages are formed on the upper surface of the core portion 421, and the door trim lower 30 is fed into a second cavity 425 for molding. In addition, guide posts 426 that serve as a guide mechanism protrude from the four corners of the molded lower mold 42, and the guide posts 426 guide into the guide bush 413 when the molded upper and lower molds 41 and 42 are clamped. As a result, the pressing posture of the molding upper die 41 can be properly maintained.

  Further, as shown in FIG. 5, in order to form the boundary groove portion 17 in the door trim 10, a protrusion 414 protrudes from the upper molding die 41, and a concave portion 427 corresponds to the lower molding die 42 correspondingly. The dividing mechanism 50 is formed in the recess 427. The dividing mechanism unit 50 is controlled so that the dividing bar 51 can be moved up and down by a predetermined stroke by a drive cylinder 52. On the upper surface of the dividing bar 51, a convex portion 414 of the upper mold 41 is received, and when the door trim lower 30 is formed, a recess 51a for forming the reinforcing rib 31 is formed.

  Next, an outline of a manufacturing method of the two-tone type automobile door trim 10 using the molding die 40 described above will be described. First, as shown in FIG. 6, the skin 22 is set in the first cavity 424. At this time, the skin 22 is held on the mold surface of the molding upper mold 41 by a set pin (not shown) or a vacuum suction action. The movable frame may be set in the cavity 424.

  Further, after the skin 22 is set, the raising / lowering cylinder 412 of the molding upper die 41 operates to lower the molding upper die 41 by a predetermined stroke, and the molding upper and lower dies 41 and 42 are clamped as shown in FIG. In order to form the resin base 21 in the door trim upper 20 from the first injector 43a through the manifold 422a and the gate 423a, the molten resin M1 is injected and filled into the first cavity 424. The injection timing of the molten resin M1 may be set before the mold upper and lower molds 41 and 42 are clamped. In addition, as the molten resin M1, a resin in which talc is mixed at an appropriate ratio using Sumitomo Noblen BUE81E6 (polypropylene manufactured by Sumitomo Chemical Co., Ltd., melt index = 65 g / 10 min) is used.

  And as shown in FIG. 8, about the junction part of the door trim upper 20 and the door trim lower 30, the upper end surface of the division | segmentation bar 51 in the division | segmentation mechanism part 50 is located below the type | mold surface of the shaping | molding lower mold | type 42, The edge portion of the resin base material 21 is formed so that the bent portion 21 a enters the boundary groove portion 17 at the edge portion of the resin base material 21 due to the step difference H of the corner portion provided in the molding lower mold 42. .

  Specifically explaining the dimensional relationship at this time, in order to form the boundary groove portion 17, the protruding dimension of the ridge 414 formed on the molding upper die 41 is adjusted to 6 mm, and the width is adjusted to 1.5 mm. As for the thickness of the resin base material 21, the general part is 2.3 mm, the length of the bent part 21a is 1.7 mm, and the thickness of the bent part 21a is set to about 2.0 mm. In addition, a gap of 0.02 mm or less is set between the lower molding die 42 and the division bar 51 so that the vertical movement of the division bar 51 in the division mechanism unit 50 can be performed smoothly.

  As described above, when the resin base material 21 and the skin 22 are integrated and the molding of the door trim upper 20 is completed, the second trimming machine 43b is used to mold the door trim lower 30 as shown in FIG. The molten resin M2 is injected and filled into the second cavity 425 for molding the door trim lower 30 through the manifold 422b and the gate 423b, and the door trim lower 30 is molded into a required shape.

  At this time, as shown in FIG. 10, in the vicinity of the boundary groove portion 17, the drive cylinder 52 in the dividing mechanism portion 50 contracts and the dividing bar 51 descends, whereby the second cavity 425 for forming the door trim lower 30 is formed. A space 428 that communicates with the resin base 21 is newly formed, and this space 428 faces the bent portion 21 a of the resin base material 21.

  Therefore, by injecting and filling the molten resin M2 into the second cavity 425 and the space 428, the door trim lower 30 can be formed into a required shape and integrated with the door trim upper 20. At this time, the molten resin M2 introduced into the space 428 hits the bent portion 21a on the door trim upper 20 side, and the molten resin M2 does not leak to the outside due to the sealing action of the bent portion 21a. Sealability is ensured. In this embodiment, the molten resin M2 used as the material of the door trim lower 30 is Sumitomo Nobrene BUE81E6 (polypropylene manufactured by Sumitomo Chemical Co., Ltd., melt index = 65 g / 10 min). Compared with the material 21, the door trim lower 30 appears on the surface of the product. Therefore, it is preferable to mix a pigment and apply a desired color or engrave a drawn pattern.

  As described above, according to the method of the present invention, when the two-tone type automobile door trim 10 is manufactured, the two injection machines 43a and 43b are connected to the molded lower mold 42, and the door trim upper 20 and the door trim lower 30 are connected. In addition to injecting and filling the molten resins M1 and M2 through the resin passages and providing the dividing mechanism unit 50 and appropriately moving the dividing bar 51 up and down, the door trim upper 20 and the door trim lower 30 can be firmly integrated. The two-tone type automobile door trim 10 can be easily manufactured through a series of processes using one molding die 40.

  Next, FIG. 11A is a modification in which the bent portion 21a of the resin base material 21 is set to a dimension A1 that is longer than the dimension A of the above-described embodiment. As described above, when the bent portion 21a is set to the long dimension A1, it is possible to prevent the adverse effect of acting on the resin base material 21 as much as possible. That is, as shown in FIG. 11 (b), even if the skin 22 is broken during the molding of the resin base material 21, the fluidity of the molten resin M2 during the molding of the door trim lower 30 as shown in FIG. 11 (c). Will not be damaged.

  The embodiment described above is a door trim 10 having a vertically divided structure including a door trim upper 20 and a door trim lower 30, and a structure composed of a laminated structure of a resin base material 21 and a skin 22 is applied as the door trim upper 20. However, it can also be applied to the door trim upper 20 made of a single molded body. In addition, if it is a two-color molded product, it can be applied to all interior parts such as rear parcel shelf, floor trim, trunk trim, rear side trim and the like.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view showing an embodiment in which an automotive interior part according to the present invention is applied to a two-tone type automobile door trim. It is the II-II sectional view taken on the line in FIG. FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 1 and is a cross-sectional view illustrating a configuration of a boundary groove portion between a door trim upper and a door trim lower. It is explanatory drawing which shows the whole structure of the molding die used when shape | molding the door trim for motor vehicles shown in FIG. It is explanatory drawing which shows the structure of the division mechanism part in the shaping die shown in FIG. It is explanatory drawing which shows the setting process of the skin in the manufacturing method of the door trim for motor vehicles shown in FIG. It is explanatory drawing which shows the formation process of the door trim upper in the manufacturing method of the door trim for motor vehicles shown in FIG. It is principal part sectional drawing at the time of shaping | molding of the door trim upper in the manufacturing method of the door trim for motor vehicles shown in FIG. It is explanatory drawing which shows the formation process of the door trim lower in the manufacturing method of the door trim for motor vehicles shown in FIG. It is sectional drawing which shows the effect | action of the division | segmentation mechanism part in the formation process of a door trim lower. It is sectional drawing which shows the modification of the boundary groove part in the door trim for motor vehicles based on this invention. It is an exploded view showing the conventional upper and lower split type door trim. It is sectional drawing which shows the structure of the conventional upper and lower split type door trim. It is explanatory drawing which shows the outline | summary of the shaping | molding process of the conventional door trim upper.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Automobile door trim 16 Car body panel 17 Boundary groove part 20 Door trim upper 21 Resin base material 21a Bending part 22 Skin 30 Door trim lower (resin single-piece product)
30a End edge portion 31 Reinforcing rib 40 Molding die 41 Molding upper mold 42 Molding lower die 424 First cavity (for door trim upper molding)
425 Second cavity (for door trim lower molding)
428 Space 43a, 43b Injection machine 50 Dividing mechanism 51 Dividing bar 52 Driving cylinder A, A1 Dimensions of bent part M1, M2 Molten resin H Step

Claims (2)

At least two cavities (424, 425) are set in the molding die (40), and molten resins (M1, M2) are injected from the injection machines (43a, 43b) corresponding to the cavities (424, 425). In a two-color molded product (10) formed by filling and joining and integrating a plurality of resin molded bodies (20, 30),
A boundary groove (17) is set along the joint portion of both resin molded bodies (20, 30), and the shape of the boundary groove (17) is formed at the edge portion of the resin molded body (20) on one side. A bent portion (21a) is formed, and the bent portion (21a) is abutted against the end edge portion (30a) of the resin molded body (30) on the other side, and the dimension of the bent portion (21a) is formed. A two-color molded product characterized in that (A) is set to 0.5 to 17 mm. At least two cavities (424, 425) are set in the molding die (40), and molten resins (M1, M2) are injected from the injection machines (43a, 43b) corresponding to the cavities (424, 425). In a molding method of a two-color molded product (10) formed by filling and joining and integrating a plurality of resin molded bodies (20, 30),
The molds (41, 42) are clamped, the molten resin (M1) is injected and filled into the first cavity (424), and the resin molded body (20) on one side is molded into a required shape. , A molding step of the resin molded body (20) on one side forming a bent portion (21a) that bends downward at the edge portion of the resin molded body (20);
The dividing bar (51) of the dividing mechanism (50) provided in the lower mold (42) is moved down so as to correspond to the boundary between the first cavity (424) and the second cavity (425). Then, a space (428) facing the bent portion (21a) of the resin molded body (20) is formed so as to communicate with the second cavity (425), and the second cavity (425) and the space ( 428) The molten resin (M2) is injected and filled into the other side, the other side resin molded body (30) is molded into a required shape, and the other resin molded bodies (20, 30) are joined and integrated together. Molding step of the resin molded body (30) on the side;
A molding method for a two-color molded product comprising:

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