JP2013107328A - Method of manufacturing multi-colored molded product, molding die and multi-colored molded product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of manufacturing a multi-colored molded product, the method which can further enhance design performance.SOLUTION: The method includes: a slide-die entering step of forming a lower board molding space 81 by making a slide die 70 enter a molding space 80; a lower board molding step of molding a lower board 40 by injecting a melted resin into the lower board molding space 81; a slide-die retreating step of forming an upper board molding space 82 by making the slide die 70 retreat from the molding space 80; and an upper board molding step of molding an upper board 30 by injecting a melted resin different from the lower board 40 in color into the upper board molding space 82. The method is also characterized in that, in the slide-die entering step, a portion of a lower face 71 of the slide die 70 is brought into abutment with a molding face 53 for forming a flat face 30, and an opening 81A is blocked by the slide die 70, thus setting a connecting point between a connecting face 30B and a surface 40A as a boundary between the upper board 30 and the lower board 40.

Description

  The present invention relates to a method for producing a multicolor molded product, a mold, and a multicolor molded product.

  Conventionally, as a manufacturing method of a multicolor molded product in which a first molded product and a second molded product having different colors are integrally formed, for example, a method described in Patent Document 1 below is known. In the thing of patent document 1, the door trim for vehicles which consists of two colors is illustrated as a multicolor molded product. Then, the molding space formed in the molding die is divided into a first molding space and a second molding space by a slide die (dividing bar), and molten resins having different colors are sequentially injected into the respective molding spaces, thereby causing the first. A manufacturing method for integrally molding a molded product (door trim upper) and a second molded product (door trim lower) is illustrated. There is also known a configuration in which a texture pattern is formed on the surface of a molded product to form a texture pattern (uneven pattern) on the surface of the molded product to enhance the design.

JP 2010-184366 A

  In the manufacturing method described above, it is necessary to prevent the molten resin from leaking from the first molding space to the second molding space by bringing the slide mold and the molding surface of the molding mold into contact with each other without any gap. For this reason, it is necessary to make a part of the molding surface of the molding die a flat surface on which no wrinkle pattern is formed, and to bring the slide mold into contact with the flat surface. That is, a texture pattern cannot be formed on a part of the surface of the molded product. If the surface (design surface) of the molded product is not partially formed with a wrinkle pattern, the design is impaired. For this reason, it is necessary to form the surface in which the embossed pattern is not formed in a place where it is hard to be seen as much as possible.

  Patent Document 1 described above discloses a configuration in which a groove is provided in a molded product by providing a convex portion on the molding surface. If the tip surface of such a convex portion is the above-described flat surface, it is possible to set the back surface of the groove portion that is difficult to be seen as a surface on which no texture pattern is formed. However, in such a method, it is necessary to form a groove on the molding surface, which may impair the design.

  The present invention has been completed based on the above-described circumstances, and a multicolor molded product having a texture pattern on the surface thereof, and a method for producing a multicolor molded product capable of further improving the design. The purpose is to provide. Moreover, it aims at providing the shaping | molding die which can shape | mold such a multicolor molded product. Another object of the present invention is to provide such a multicolor molded product.

  In order to solve the above-mentioned problems, a method for producing a multicolor molded product according to the present invention has a plate shape, an upper molding surface portion that is relatively disposed on the upper side, and a plate shape that is lower than the upper molding surface portion. A multi-color molded product integrally provided with a lower molding surface portion that is arranged on the side and has a color different from that of the upper molding surface portion, wherein the multi-color molded product includes the upper molding surface portion and the Having a step portion extending along the boundary with the lower molding surface portion, the step portion being formed on the first surface formed on the upper molding surface portion and on the lower molding surface portion, A second surface that is lower than the first surface, and a connection surface that is formed on the upper molding surface portion, connects the first surface and the second surface, and faces downward. A texture pattern is formed on both the first surface and the second surface, while at least the connecting surface is formed. In a part of the flat surface that extends along the extending direction of the stepped portion and is not formed with a wrinkle pattern, the method for manufacturing a multicolor molded product includes closing a pair of molds. A mold closing step for forming a molding space for molding the multicolor molded product, and a slide mold provided in one of the pair of molds is allowed to enter the molding space, so that one part of the molding space is formed. A slide mold entering step for forming a portion as a lower molding surface portion molding space for molding the lower molding surface portion, and a lower mold surface molding step by injecting molten resin into the lower molding surface portion molding space. A side mold surface part molding step, and a slide mold retracting step of forming the other part of the molding space as an upper molding surface part molding space for molding the upper molding surface part by retracting the slide mold from the molding space; The upper side An upper molding surface portion molding step for molding the upper molding surface portion by injecting a molten resin having a color different from that of the lower molding surface portion into the surface molding space, and in the slide mold entering step, the slide mold, The slide mold is formed on a molding surface for molding the flat surface formed on the other mold of the pair of molds by entering the molding space along a direction intersecting the opening / closing direction of the pair of molds. A part of the surface of the lower surface and the opening on the upper molding surface portion molding space side in the lower molding surface portion molding space is closed by the slide mold, thereby connecting the connection portion between the coupling surface and the second surface. It is characterized in that it is set as a boundary between the upper molding surface portion and the lower molding surface portion.

  According to the present invention, by causing a part of the surface of the slide mold to come into contact with a molding surface for molding a flat surface, it is possible to suppress the occurrence of a gap between both surfaces, and the molten resin enters the gap. The situation can be suppressed. As a result, the upper molding surface portion and the lower molding surface portion can be reliably molded.

  Further, since the flat surface on which the wrinkle pattern is not formed is formed as a part of the connecting surface facing downward, the flat surface (the wrinkle pattern is not formed) when the multicolor molded product is viewed from above. I can't see. In other words, the first surface and the second surface on which the texture pattern is formed are continuously visually recognized, and the design property is not impaired.

  Furthermore, in this invention, the boundary of an upper side molding surface part and a lower side molding surface part can be set to the connection location of a connection surface (surface facing downward) and a 2nd surface. Thereby, when a multicolor molded product is viewed from above, the boundary between the upper molding surface portion and the lower molding surface portion is not visually recognized, and the design can be further improved.

  In the above method, the direction of entry and retraction of the slide mold with respect to the molding space should be along the direction away from the upper molding surface part molding space as the distance from the molding surface for molding the flat surface increases. it can.

  Temporarily, in the configuration in which the slide mold enters from a direction orthogonal to the molding surface for forming the flat surface (the contact portion with the slide mold), the slide mold moving path and the upper molding surface portion molding space tend to overlap. That is, it is difficult to retract the slide mold from the upper molding surface portion molding space, which is not preferable for molding. In order to suppress such a situation, it is necessary to increase the level difference of the step part. However, if the level difference part becomes large, there is a possibility that the design property may be deteriorated. According to the present invention, the entry direction and the retraction direction of the slide mold are along the direction away from the upper molding surface portion molding space as the distance from the molding surface increases. With such a configuration, the movement path of the slide mold and the upper molding surface portion molding space are not easily overlapped, and the slide mold can be easily retracted from the upper molding surface portion molding space. As a result, the step of the step portion can be further reduced.

  In addition, the multicolor molded product includes a first plate portion and a second plate portion that rises from the peripheral end of the first plate portion with respect to the first plate portion, and the step portion is The first plate portion and the second plate portion are configured to extend over both of the first plate portion and the second plate portion. In the slide mold entering step, the first plate portion and the second plate portion are bent. The opening having the shape to be copied can be closed by the other part of the surface of the slide mold.

  According to the present invention, the opening having a shape corresponding to the bent shape of the first plate portion and the second plate portion can be closed by the other portion of the surface of the slide mold. Thereby, the 1st board part and 2nd board part which make a bent shape can be fabricated.

  Next, in order to solve the above problems, the molding die of the present invention has a plate shape, an upper molding surface portion that is relatively disposed on the upper side, a plate shape, and a lower side with respect to the upper molding surface portion. A molding die that is integrally formed with a lower molding surface portion having a color different from that of the upper molding surface portion, wherein the multicolor molding product is The step has a step portion extending along the boundary between the upper molding surface portion and the lower molding surface portion, and the step portion includes a first surface formed on the upper molding surface portion and the lower molding surface portion. A second surface that is lower than the first surface, and a connection surface that is formed on the upper molding surface portion, connects the first surface and the second surface, and faces downward. A texture pattern is formed on both the first surface and the second surface, while the front surface In the case where at least a part of the connecting surface is a flat surface extending along the extending direction of the stepped portion and not having a texture pattern, the molding die is closed to form the multicolor molding. A pair of molds capable of forming a molding space for molding a product, and one of the pair of molds, and enters the molding space along a direction intersecting the opening and closing direction of the pair of molds And a slide mold capable of forming a part of the molding space as a lower molding surface portion molding space for molding the lower molding surface portion, and the other die molds the flat surface. The slide mold that has entered the molding space has a part of the surface of the slide mold in contact with the molding surface for molding the flat surface, and the slide mold The upper side in the side molding surface part molding space By closing the opening on the side of the shaping surface portion molding space, it is possible to set the connection location between the connection surface and the second surface as a boundary between the upper molding surface portion and the lower molding surface portion. Has characteristics.

  According to the present invention, by causing a part of the surface of the slide mold to come into contact with a molding surface for molding a flat surface, it is possible to suppress the occurrence of a gap between both surfaces, and the molten resin enters the gap. The situation can be suppressed. As a result, the upper molding surface portion and the lower molding surface portion can be reliably molded.

  Further, since the flat surface on which the wrinkle pattern is not formed is formed as a part of the connecting surface facing downward, the flat surface (the wrinkle pattern is not formed) when the multicolor molded product is viewed from above. I can't see. In other words, the first surface and the second surface on which the texture pattern is formed are continuously visually recognized, and the design property is not impaired.

  Furthermore, in this invention, the boundary of an upper side molding surface part and a lower side molding surface part can be set to the connection location of a connection surface (surface facing downward) and a 2nd surface. Thereby, when a multicolor molded product is viewed from above, the boundary between the upper molding surface portion and the lower molding surface portion is not visually recognized, and the design can be further improved.

  Next, in order to solve the above-mentioned problem, the multicolor molded product of the present invention has a plate shape, an upper molding surface portion that is relatively disposed on the upper side, a plate shape, and the upper molding surface portion. A multi-color molded product integrally provided with a lower molding surface portion which is arranged on the lower side and has a color different from that of the upper molding surface portion, along the boundary between the upper molding surface portion and the lower molding surface portion The step portion is extended, the step portion is a first surface formed on the upper molding surface portion, a second surface is formed on the lower molding surface portion and is a lower surface than the first surface, A connecting surface formed on the upper molding surface portion, connecting the first surface and the second surface and facing downward; both of the first surface and the second surface have a texture While the pattern is formed, at least a part of the connection surface extends along the extending direction of the stepped portion. Is a flat surface embossed pattern is not formed, characterized in that the connecting point between the connecting surface and the second surface is a boundary between the lower molding surface part and said upper molding surface part.

  In the present invention, since the flat surface on which the texture pattern is not formed is formed as a part of the connecting surface facing downward, the flat surface (the texture pattern is formed when the multicolor molded product is viewed from above. I can't see the side). In other words, the first surface and the second surface on which the texture pattern is formed are continuously visually recognized, and the design property is not impaired.

  Furthermore, in this invention, the connection location of a connection surface (surface which faces below) and a 2nd surface is made into the boundary of an upper side molding surface part and a lower side molding surface part. Thereby, when a multicolor molded product is viewed from above, the boundary between the upper molding surface portion and the lower molding surface portion is not visually recognized, and the design can be further improved.

  ADVANTAGE OF THE INVENTION According to this invention, the manufacturing method of the multicolor molded product which can make the design nature higher can be provided in the multicolor molded product which has a wrinkle pattern on the surface. Moreover, the shaping | molding die which can manufacture such a multicolor molded product can be provided. Moreover, such a multicolor molded product can be provided.

The front view which shows the door trim which concerns on embodiment of this invention. The perspective view which shows the main surface part and standing wall part in the principal part of the trim board of FIG. 1 (corresponding to the part enclosed by the one-dot chain line D of FIG. 1) Sectional drawing which shows the shaping | molding die concerning embodiment of this invention (corresponding to the figure cut | disconnected by the AA line of FIG. 2) Sectional drawing which shows the state which inject | poured resin from the state of FIG. 3 to the lower board molding space Sectional drawing which shows the state which evacuated the slide type | mold from the state of FIG. 4, and formed the upper board formation space Sectional drawing which shows the state which inject | poured resin from the state of FIG. 5 to the upper board molding space Sectional drawing which shows the shaping | molding die concerning embodiment of this invention (corresponding to the figure cut | disconnected by the BB line of FIG. 2) Sectional drawing which shows the state which injected resin from the state of FIG. 7 to the lower board molding space Sectional drawing which shows the state which evacuated the slide type | mold from the state of FIG. 8, and formed the upper board molding space Sectional drawing which shows the state which injected resin from the state of FIG. 9 into the upper board molding space Sectional drawing which shows the shaping | molding die concerning embodiment of this invention (corresponding to the figure cut | disconnected by CC line of FIG. 2) Sectional drawing which shows other embodiment Sectional view showing a comparative example

<Embodiment 1>
A first embodiment of the present invention will be described with reference to FIGS. In this embodiment, the door trim 10 attached to the vehicle door is illustrated. FIG. 1 is a front view showing a door trim 10 of the present embodiment. The door trim 10 includes a trim board 20 formed by forming a thermoplastic synthetic resin such as polypropylene (polyolefin resin) into a plate shape.

  As shown in FIGS. 1 and 2, the trim board 20 (multicolor molded product) includes a main surface portion 21 (first plate portion) having a substantially rectangular shape when viewed from the front, and a side end (circumferential end) of the main surface portion 21. ), And a standing wall portion 22 (second plate portion) that rises to the back side (outside of the passenger compartment). In other words, the standing wall portion 22 is configured to rise in a shape that is bent with respect to the main surface portion 21. The standing wall portion 22 is provided upright from each end portion of the main surface portion 21 in the vehicle front-rear direction. In FIG. 2, the standing wall portion 22 disposed on the rear side of the vehicle is illustrated.

  The main surface portion 21 constitutes substantially the entire surface of the vehicle door on the vehicle interior side. As shown in FIG. 1, the armrest 12 is formed on the main surface portion 21 so as to protrude toward the vehicle interior side. In addition, a speaker grill 16, a door pocket 18, and the like are attached to the main surface portion 21.

  As shown in FIGS. 1 and 2, the trim board 20 includes an upper board 30 (upper molding surface portion) and a lower board 40 (lower molding surface portion) having a color different from that of the upper board 30. The trim board 20 has a stepped portion 23 extending along the boundary between the upper board 30 and the lower board 40. That is, the trim board 20 is formed of a material having a different color with the stepped portion 23 as a boundary. Further, the step portion 23 extends along the horizontal direction.

  The upper board 30 has a plate shape and is a portion that is disposed on the relatively upper side of the trim board 20. The lower board 40 has a plate shape and is a portion disposed on the lower side with respect to the upper board 30. Further, the upper board 30 and the lower board 40 are integrally formed by injection molding described later.

  As shown in FIG. 6, the step portion 23 is formed by forming the lower board 40 so as to be shifted from the upper board 30 to the outside of the passenger compartment (the right side in FIG. 6). That is, the step portion 23 includes a surface 30A (surface on the vehicle compartment front side, first surface) of the upper board 30 and a surface 40A (surface on the vehicle compartment front side, second surface) of the lower board 40 lower than the surface 30A on the vehicle exterior side. Surface), and the connection surface 30B which connects the surface 30A and the surface 40A and faces downward.

  As shown in FIGS. 2 and 6, the connecting surface 30 </ b> B is formed on the upper board 30. That is, the boundary between the upper board 30 and the lower board 40 (the color boundary in the trim board 20) is a connection portion between the connection surface 30B and the surface 40A.

  As shown in FIG. 2, the step portion 23 is formed so as to be bent over the main surface portion 21 and the standing wall portion 22. As shown in FIG. 2, the stepped portion 23 has a different cross-sectional shape between the main surface portion 21 and the standing wall portion 22. In the following description, the step portion 23 in the main surface portion 21 is denoted by reference numeral 23A, and the step portion 23 in the standing wall portion 22 is denoted by reference numeral 23B. In FIG. 2, in order to make it easy to illustrate the cross-sectional shape of the step portion 23A in the main surface portion 21, a view in which the main surface portion 21 is cut along a cross-sectional line L1 is shown.

  Further, of the surface 30A of the upper board 30, the surface of the main surface portion 21 is denoted by reference numeral 31A, and the surface of the standing wall portion 22 is denoted by reference numeral 32A. Moreover, as shown in FIG.6 and FIG.10, the connection surface in the main surface part 21 attaches | subjects the code | symbol 31B among the connection surfaces 30B of the upper board 30, and attaches | subjects the code | symbol 32B to the connection surface in the standing wall part 22. As shown in FIG. Further, of the surface 40A of the lower board 40, the surface of the main surface portion 21 is denoted by reference numeral 41A, and the surface of the standing wall portion 22 is denoted by reference numeral 42A.

  As shown in FIGS. 2 and 10, the standing wall portion 22 has a shape that inclines toward the inside of the trim board 20 as it goes downward. Further, most of the surface 32A of the standing wall portion 22 and the surface 42A of the standing wall portion 22 are configured to be flush with each other.

  Moreover, as shown in FIG. 3, a wrinkle pattern is formed on a part of the connecting surface 30B, the surface 30A, and the surface 40A. And the edge part by the side of the surface 40A in the connection surface 30B is made into the flat surface 30C in which the wrinkle pattern is not formed. The flat surface 30C is a surface necessary when the upper board 30 and the lower board 40 are molded by a molding die 50 described later.

  The flat surface 30C extends along the extending direction of the stepped portion 23 and is flush with the boundary surface between the upper board 30 and the lower board 40 as shown in FIGS. In the following description, the flat surface in the main surface portion 21 of the flat surface 30C is denoted by reference numeral 31C, and the flat surface of the standing wall portion 22 is denoted by reference numeral 32C.

  Next, the structure of the mold 50 for manufacturing the trim board 20 (the upper board 30 and the lower board 40) will be described with reference to the drawings of FIGS. As shown in FIG. 3, the mold 50 is provided inside a pair of molds (first mold 51 and second mold 61) that can be opened and closed with each other and a second mold 61 (one of the pair of molds). A slide mold 70 (core).

  The 1st type | mold 51 and the 2nd type | mold 61 are provided so that opening and closing is possible by the drive means which is not shown in figure. By closing the first mold 51 and the second mold 61, a molding space 80 (cavity) for molding the trim board 20 is formed, and by injecting molten resin into the molding space 80, the trim board 20 Can be molded.

  And as shown in FIG. 11, the shaping | molding space 80 has comprised the bending shape along the shape of the main surface part 21 and the standing wall part 22. As shown in FIG. 3 to 6 are cross-sectional views showing a portion (main surface portion forming space) where the main surface portion 21 of the trim board 20 is formed in the forming space 80 of the forming die 50. 7 to 10 are cross-sectional views showing a portion (standing wall portion forming space) for forming the standing wall portion 22 of the trim board 20 in the forming space 80 of the mold 50.

  As shown in FIGS. 3 and 7, a mold-side step portion 52 for forming the step portion 23 of the trim board 20 is formed on the surface (molding surface) of the first die 51 facing the second die 61. ing. That is, the surface of the first mold 51 that faces the second mold 61 has a shape that follows the shape of the surface of the trim board 20 (surface 30A, connecting surface 30B, surface 40A).

  In addition, a wrinkle pattern (illustrated by a wavy line in FIG. 3) is formed on the surface of the first mold 51 facing the second mold 61, except for a contact surface with the slide mold 70 (a molding surface 53 described later). ing. A texture pattern is formed on the surface of the trim board 20 by the texture pattern. In addition, on the molding surface of the first mold 51 (the other of the pair of molds), the molding surface 53 (the upper surface of the mold side step portion 52) for molding the flat surface 30C is not formed with a texture pattern. A flat surface. Note that the surface of the second mold 61 that faces the first mold 51 has a shape that follows the shape of the rear surface of the trim board 20.

  The slide mold 70 can divide the molding space 80 by entering the molding space 80. Accordingly, a part of the molding space 80 can be formed by the slide die 70 as a lower board molding space 81 (lower molding surface part molding space) for molding the lower board 40.

  Further, in the molding space 80, a space (other part of the molding space 80) excluding the lower board molding space 81 is an upper board molding space 82 (upper molding surface portion molding space) for molding the upper board 30. The molding die 50 according to the present embodiment includes a first gate (not shown) arranged in communication with the lower board molding space 81 and a second gate (not shown) arranged in communication with the upper board molding space 82. And). Accordingly, the molten resin can be individually supplied from the injection device (not shown) to the lower board molding space 81 and the upper board molding space 82 through each gate.

  As shown in FIGS. 5 and 9, the slide mold 70 is accommodated in an accommodation space 62 that communicates with the upper board forming space 82 in the second mold 61. As shown in FIG. 3, the slide mold 70 can be driven by a drive device such as a hydraulic cylinder 72, and intersects the opening / closing direction (left-right direction in FIG. 5) of the pair of molds 51, 61 with respect to the molding space 80. It can enter along the direction to go (oblique direction in FIG. 5). The drive means of the slide mold 70 is not limited to the hydraulic cylinder 72 and can be changed as appropriate.

  More specifically, the approach direction and the retraction direction of the slide mold 70 with respect to the molding space 80 are separated from the molding surface 53 as the upper board molding space 82 (more precisely, the main surface portion 21 of the upper board molding space 82 is the main surface portion 21. It is supposed to be along the direction away from the part to be molded.

  That is, as the slide die 70 approaches the molding surface 53, the slide die 70 can enter the molding space 80 so as to approach the portion of the upper board molding space 82 where the main surface portion 21 is molded (in FIG. 70 is allowed to enter the left side as it goes down). Further, as the slide die 70 moves away from the molding surface 53, the slide die 70 can be retracted from the molding space 80 so as to move away from the portion of the upper board molding space 82 where the main surface portion 21 is molded.

  When the slide mold 70 enters the molding space 80, a part (end portion) of the lower surface 71 of the slide mold 70 can contact the molding surface 53 of the first mold 51 without any gap. . In a state where a part of the lower surface 71 of the slide mold 70 is in contact with the molding surface 53 of the first mold 51, as shown in FIG. 3 and FIG. 53), the opening 81A on the upper board forming space 82 side in the lower board forming space 81 (the end portion on the upper board forming space 82 side in the lower board forming space 81) is blocked. Yes.

  Further, as shown in FIG. 11, the molding space 80 has a bent shape that follows the shapes of the main surface portion 21 and the standing wall portion 22 in a cross-sectional view, and the opening 81 </ b> A on the upper board molding space 82 side in the lower board molding space 81. Also, it has a bent shape following the shapes of the main surface portion 21 and the standing wall portion 22. The lower surface 71 of the slide mold 70 is configured to cover (close) the entire cross-section (opening 81A on the upper board molding space 82 side of the lower board molding space 81) of the molding space 80 having a bent shape. ing.

  Next, a method for manufacturing the trim board 20 using the mold 50 will be described with reference to FIGS. 3 to 11. The manufacturing method of the trim board 20 in the present embodiment includes a mold closing process, a slide mold entering process in which the lower board molding space 81 is formed by the slide mold 70, and a lower board molding process in which the lower board 40 is molded (lower molding surface part molding process). And a slide type retreating process for forming the upper board forming space 82, and an upper board forming process (upper forming surface part forming process) for forming the upper board 30.

<Mold closing process>
First, the first mold 51 and the second mold 61 are closed. Thereby, the shaping | molding space 80 is formed between mutually opposing surfaces (refer FIG. 3).

<Slide type approach process>
Next, the slide mold 70 enters the molding space 80, and a part of the lower surface 71 of the slide mold 70 is brought into contact with the molding surface 53 of the first mold 51 (see FIGS. 3 and 7). At the same time, the lower surface 71 of the slide mold 70 closes the opening 81A on the upper board forming space 82 side in the lower board forming space 81 (FIG. 11). Thereby, a part of the molding space 80 is formed as a lower board molding space 81.

  Here, “the state in which the opening on the upper board molding space 82 side in the lower board molding space 81 is blocked” means that the molten resin is blocked by the slide mold 70 when the molten resin is injected into the lower board molding space 81. In this state, it does not flow into the upper board forming space 82 side. In addition, since the embossed pattern is not formed in the molding surface 53 of the 1st type | mold 51, when the lower surface 71 of the slide type | mold 70 is contact | abutted, a clearance gap does not arise.

  Further, the lower surface 71 of the slide mold 70 is arranged in a form that is flush with the molding surface 53 for molding the flat surface 30C. Thereby, the connection location of the connection surface 30 </ b> B and the surface 40 </ b> A in the trim board 20 is set as a boundary between the upper board 30 and the lower board 40.

<Lower board molding process (lower molding surface part molding process)>
Next, the molten resin is injected into the lower board molding space 81 and filled into the lower board molding space 81. When the molten resin cools and hardens over time, the lower board 40 is formed (see FIGS. 4 and 8).

<Slide type evacuation process>
Next, the slide mold 70 is retracted from the molding space 80 and accommodated in the accommodating space 62. Thereby, the other part of the shaping | molding space 80 is formed as the upper board shaping | molding space 82 (refer FIG.5 and FIG.9).

<Upper board molding process (upper molding surface part molding process)>
Next, a molten resin having a color different from that of the lower board 40 is injected into the upper board molding space 82, and the molten resin is filled into the upper board molding space 82. By injecting the molten resin into the upper board molding space 82, the resin forming the lower board 40 and the injected molten resin are melted and mixed at the end of the lower board 40.

  Eventually, when the molten resin filled in the upper board molding space 82 cools and hardens, the upper board 30 is molded, and at the same time, both components are joined at the boundary between the upper board 30 and the lower board 40 (FIG. 6). And FIG. 10). More specifically, the connection location between the connection surface 30 </ b> B of the upper board 30 and the surface 40 </ b> A of the lower board 40 is the boundary between the upper board 30 and the lower board 40. Through the above steps, the manufacture of the trim board 20 in which the upper board 30 and the lower board 40 are integrally formed is completed.

  Next, the effect of this embodiment will be described. According to the present embodiment, by causing a part of the lower surface 71 of the slide mold 70 to abut on the molding surface 53 for molding the flat surface 30C, it is possible to suppress the occurrence of a gap between both surfaces, and the molten resin A situation of entering the gap can be suppressed. Thereby, the upper board 30 and the lower board 40 can each be reliably molded.

  Further, since the flat surface 30C on which the texture pattern is not formed is formed as a part of the connecting surface 30B facing downward, when the trim board 20 is viewed from above, the flat surface 30C (the texture pattern is formed). I can't see the side). In other words, when viewed from above, the surface 30 </ b> A and the surface 40 </ b> A on which the texture pattern is formed are continuously viewed, and the design is not impaired.

  Moreover, in this embodiment, the boundary of the upper board 30 and the lower board 40 can be set to the connection location of the connection surface 30B (surface facing downward) and the surface 40A. Thereby, when the trim board 20 is viewed from above, the boundary between the upper board 30 and the lower board 40 is not visually recognized, and the design can be further improved.

  The door trim 10 (trim board 20) is a member that is disposed below the height of the passenger's eyes in the vehicle. For this reason, the occupant normally sees the trim board 20 from above, and hardly sees it from below. Thereby, in this embodiment, it can suppress that a passenger | crew visually recognizes the boundary (border which a color changes) of the flat surface 30C and the upper board 30 and the lower board 40, and can improve design property.

  In addition, the entry direction and the retraction direction of the slide mold 70 with respect to the molding space 80 are set along the direction away from the upper board molding space 82 as the distance from the molding surface 53 for molding the flat surface 30C increases.

  In this embodiment, as shown in FIG. 12, it is good also as a structure which makes the slide type | mold 170 approach from the direction (up-down direction of FIG. 12) orthogonal to the shaping | molding surface 53 for shape | molding the flat surface 30C. However, in the configuration in which the slide mold is entered from the direction orthogonal to the molding surface 53 (the contact portion with the slide mold) for molding the flat surface 30C, the slide mold moving path and the upper board molding space are likely to overlap. .

  That is, it becomes difficult to retract the slide mold 70 from the upper board molding space 82, which is not preferable for molding. In order to suppress such a situation, as shown in FIG. 12, it is necessary to increase the step of the mold side step portion 152 (that is, the step portion 23). However, when the level difference of the level difference part 23 becomes large, the level difference part 23 becomes easy to be noticed, and there is a possibility that the design property may deteriorate.

  Therefore, in this embodiment, the approach direction and the retraction direction of the slide mold 70 are along the direction of moving away from the upper board forming space 82 as the distance from the forming surface 53 (in other words, the upper die forming space 82 becomes closer to the forming surface 53). Along the approaching direction). With such a configuration, the movement path of the slide mold 70 and the upper board forming space 82 are not easily overlapped, and the slide mold 70 can be easily retracted from the upper board forming space 82. For this reason, as shown in FIG. 12, it is not necessary to enlarge the level | step difference of a level | step-difference part. As a result, the step of the step portion 23 can be further reduced.

  The trim board 20 includes a main surface portion 21 and a standing wall portion 22 that rises from the peripheral end of the main surface portion 21 with respect to the main surface portion 21, and a step portion 23 is formed between the main surface portion 21 and the standing wall portion 22. In the slide type entry step, an opening 81A having a shape corresponding to the bent shape of the main surface portion 21 and the standing wall portion 22 is provided in addition to the lower surface 71 of the slide die 70. It is supposed to be blocked by the part.

  According to the present embodiment, the opening 81 </ b> A having a shape that follows the bent shape of the main surface portion 21 and the standing wall portion 22 can be closed by the other portion of the lower surface 71 of the slide mold 70. Thereby, the main surface portion 21 and the standing wall portion 22 having a bent shape can be formed.

  In the configuration in which the slide die 70 enters the molding space 80 from the same direction as the die closing direction of the first die 51 and the second die 61, the shape follows the bent shape of the main surface portion 21 and the standing wall portion 22. The opening 81A cannot be completely blocked. The reason for this will be described using the comparative example of FIG.

  As shown in FIG. 13, in a mold having an opening 3 </ b> A and an opening 3 </ b> B that are bent in a cross-sectional view, the slide mold 4 enters from the same direction as the mold closing direction of the first mold 1 and the second mold 2. In (the slide mold 4 after entering is indicated by a two-dot chain line), the opening 3A can be closed by bringing the slide mold 4 into contact with the molding surface 3A1. However, a gap SA is generated between the molding surface 3B1 and the slide mold 4, and the opening 3B cannot be completely blocked. For this reason, as a result of the molten resin passing through the gap SA, the molded product cannot be molded.

  In this respect, in the present embodiment, as described above, the opening 81A is made to enter the molding space 80 from the direction intersecting the mold closing direction of the first mold 51 and the second mold 61. Can be completely blocked.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.

  (1) In the above embodiment, the trim board 20 composed of two colors is exemplified as the multicolor molded product, but the invention is not limited to this. The present invention is applicable to multicolor molded products including molded products of two or more colors. For example, as a multicolor molded product, in addition to the trim board 20, vehicle interior materials such as an instrument panel and a pillar trim can be exemplified, and the vehicle can be arranged below the occupant's line of sight (eye height). The present invention can also be applied to interior materials for automobiles. Further, the multicolor molded product is not limited to the vehicle interior material. The upper molding surface portion is not limited to the upper board 30 and can be changed as appropriate. The lower molding surface portion is not limited to the lower board 40 as long as it is disposed on the lower side with respect to the upper molding surface portion and has a different color from the upper molding surface portion.

  (2) The location where the stepped portion 23 is formed (in other words, the boundary between the upper board 30 and the lower board 40) is not limited to the above embodiment and can be changed as appropriate.

  (3) In the above embodiment, in the trim board 20 including the main surface portion 21 and the standing wall portion 22, the step portion 23 is formed across both the main surface portion 21 and the standing wall portion 22, but the present invention is not limited to this. For example, the trim board 20 including only the main surface portion 21 may be used.

  (4) In the above embodiment, the main surface portion 21 and the standing wall portion 22 are exemplified as the first plate portion and the second plate portion, respectively, but the present invention is not limited to this. The present invention can be applied to a configuration in which a stepped portion extends over both of two bent plate portions (a first plate portion and a second plate portion).

DESCRIPTION OF SYMBOLS 20 ... Trim board (multicolor molded product), 21 ... Main surface part (1st board part), 22 ... Standing wall part (2nd board which stands | starts up in the form bent from the peripheral edge of a 1st board part with respect to a 1st board part) Part), 23 ... step part, 30 ... upper board (upper molding surface part), 30A ... surface (first surface formed on the upper molding surface part), 30B ... connection surface, 30C ... flat surface, 40 ... lower board (lower side) Molding surface portion), 40A ... surface (second surface formed on the lower molding surface portion and lower than the first surface), 50 ... molding die, 51 ... first die (the other of the pair of dies). 53 ... Molding surface (molding surface for molding a flat surface), 61 ... Second mold (one of a pair of molds), 70 ... Slide mold, 71 ... Lower surface of slide mold (surface of slide mold) , 80 ... molding space, 81 ... lower board molding space (lower molding surface part molding space), 81A ... lower Over de molding space Upper board forming space side of the opening in the (opening of the upper molding surface the molding space side of the lower molding surface part molding space) 82 ... upper board forming space (upper molding surface part molding space)

Claims (5)

An upper molding surface portion that is plate-shaped and is relatively disposed on the upper side;
A method for producing a multicolor molded product comprising a plate-like shape, and a lower molding surface portion that is arranged on the lower side with respect to the upper molding surface portion and has a different color from the upper molding surface portion,
The multicolor molded product has a stepped portion extending along a boundary between the upper molding surface portion and the lower molding surface portion,
The step portion is
A first surface formed on the upper molding surface part;
A second surface that is formed on the lower molding surface portion and is lower than the first surface;
Formed on the upper molding surface portion, connecting the first surface and the second surface, and having a connecting surface facing downward,
A texture pattern is formed on both the first surface and the second surface, while at least a part of the connection surface extends along the extending direction of the stepped portion to form a texture pattern. In what is not a flat surface,
The manufacturing method of the multicolor molded product is as follows:
A mold closing step for forming a molding space for molding the multicolor molded article by closing a pair of molds;
By forming a slide mold provided in one of the pair of molds into the molding space, a part of the molding space is formed as a lower molding surface portion molding space for molding the lower molding surface portion. A slide-type approach process,
A lower molding surface portion molding step of molding the lower molding surface portion by injecting molten resin into the lower molding surface portion molding space;
Retreating the slide mold from the molding space to form the other part of the molding space as an upper molding surface part molding space for molding the upper molding surface part; and
An upper molding surface portion molding step of molding the upper molding surface portion by injecting a molten resin having a color different from that of the lower molding surface portion into the upper molding surface portion molding space;
In the slide type entry process,
Allowing the slide mold to enter the molding space along a direction intersecting the opening and closing direction of the pair of molds;
Among the pair of molds, a part of the surface of the slide mold is brought into contact with a molding surface for molding the flat surface formed on the other mold, and the lower molding surface portion molding is performed by the slide mold. By closing an opening on the upper molding surface portion molding space side in the space, a connection location between the coupling surface and the second surface is set as a boundary between the upper molding surface portion and the lower molding surface portion. A method for producing multicolor molded products. The direction of entry and retraction of the slide mold with respect to the molding space are as follows:
2. The method for producing a multicolor molded article according to claim 1, wherein the multicolor molded article is formed along a direction away from the upper molding surface portion molding space as the distance from the molding surface for molding the flat surface is increased. The multi-color molded product includes a first plate portion, and a second plate portion that rises from the peripheral end of the first plate portion with respect to the first plate portion, and the stepped portion is the first step portion. Having a configuration extending over both the first plate portion and the second plate portion,
In the slide type entry process,
3. The multicolor according to claim 1, wherein the opening having a shape following the bent shape of the first plate portion and the second plate portion is closed by another portion of the surface of the slide mold. Manufacturing method of molded products. An upper molding surface portion that is plate-shaped and is relatively disposed on the upper side;
It is possible to mold a multi-color molded product which is formed in a plate shape and is integrally provided with a lower molding surface portion which is arranged below the upper molding surface portion and has a color different from that of the upper molding surface portion. A mold,
The multicolor molded product has a stepped portion extending along a boundary between the upper molding surface portion and the lower molding surface portion,
The step portion is
A first surface formed on the upper molding surface part;
A second surface that is formed on the lower molding surface portion and is lower than the first surface;
Formed on the upper molding surface portion, connecting the first surface and the second surface, and having a connecting surface facing downward,
A texture pattern is formed on both the first surface and the second surface, while at least a part of the connection surface extends along the extending direction of the stepped portion to form a texture pattern. In what is not a flat surface,
The mold is
A pair of molds capable of forming a molding space for molding the multicolor molded article by being closed;
A part of the molding space is formed on the lower molding surface portion by entering the molding space along a direction intersecting with the opening / closing direction of the pair of molds provided in one of the pair of molds. And a slide mold that can be formed as a lower molding surface portion molding space to
The other mold has a molding surface for molding the flat surface,
The slide mold that has entered the molding space has a part of the surface of the slide mold abutted against a molding surface for molding the flat surface, and the slide mold in the lower molding surface portion molding space. By closing the opening on the upper molding surface portion molding space side, the connection location between the coupling surface and the second surface can be set as a boundary between the upper molding surface portion and the lower molding surface portion. A mold characterized by. An upper molding surface portion that is plate-shaped and is relatively disposed on the upper side;
It is a multicolor molded product comprising a plate-like shape and being arranged on the lower side with respect to the upper molding surface portion and integrally having a lower molding surface portion having a different color from the upper molding surface portion,
A step portion extends along the boundary between the upper molding surface portion and the lower molding surface portion,
The step portion is
A first surface formed on the upper molding surface part;
A second surface that is formed on the lower molding surface portion and is lower than the first surface;
Formed on the upper molding surface portion, connecting the first surface and the second surface, and having a connecting surface facing downward,
A texture pattern is formed on both the first surface and the second surface, while at least a part of the connection surface extends along the extending direction of the stepped portion to form a texture pattern. There is no flat surface,
The multi-color molded product, wherein a connection portion between the connection surface and the second surface is a boundary between the upper molding surface portion and the lower molding surface portion.

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