JP4586576B2 - Manufacturing method for vehicle parts - Google Patents

Description

  The present invention relates to a method for manufacturing a vehicle component.

  This type of vehicle component is mounted on the vehicle body using a separately prepared connector such as a clip (see, for example, Patent Document 1). A fixing member for fixing the connector is attached to the vehicle component described in Patent Document 1. Such a vehicle component is obtained by integrating the vehicle component main body and the fixing member by insert molding in which the fixing member is inserted into the cavity of the mold. When attaching the vehicle component to the vehicle body, the connector is first fixed to the vehicle component by locking the connector to the fixing member. Subsequently, the vehicle component is mounted on the vehicle body by inserting the connector into an attachment hole provided on the vehicle body side.

Recently, a method has been proposed in which a fixing member or a coupling tool is coupled to a vehicle component body that has been molded in advance (see, for example, Patent Document 2). That is, in this method, after fixing the vehicle component body, the fixing member is attached to the vehicle component body by, for example, injection-molding the fixing member and thermally fixing the fixing member to the vehicle component body. .
Japanese Patent Laid-Open No. 11-13717 JP 2002-355848 A

  By the way, in order to improve the designability of the vehicle component main body, a surface treatment such as plating, that is, a decorating process is performed on the design portion of the vehicle component main body. As described above, since the design portion of the vehicle component body is recently subjected to a high degree of decoration, the quality requirement for the appearance of such a design portion is very strict. In the technique described in Patent Document 1, since the vehicle component is molded by insert molding, a part of the fixing member is embedded in the vehicle component main body. For this reason, a part of such a fixing member affects the molding of the vehicle component main body, and appearance defects such as irregularities are likely to occur in the design portion of the vehicle component main body. In the method described in Patent Document 2, since the vehicle component body is formed in advance, the quality of the appearance of the design portion is easily ensured. In order to obtain a sufficient coupling strength between the vehicle component main body and the connecting member such as the fixing member by this method, it is necessary to secure a sufficient coupling area between the vehicle component main body and the coupling member. In such a case, the heat transmitted to the vehicle component main body with the heat fusion of the connecting member increases. Due to the heat, the vehicle component main body is slightly deformed, and the vehicle component main body is liable to have an appearance defect typified by sink marks and convex formation.

  The present invention has been made in view of such conventional circumstances, and an object of the present invention is to provide a method for manufacturing a vehicle component that can reduce the appearance defect of the vehicle component body.

In order to achieve the above object, an invention according to claim 1 is provided for a vehicle including a resin vehicle component main body and a connecting member for connecting the vehicle component main body to a mounting portion on a vehicle side. In the component manufacturing method, a first molding step of integrally molding the vehicle component main body and a protruding portion protruding from an outer peripheral surface of the vehicle component main body, and a connecting tool and the connecting tool in the vehicle component main body. A second molding step of coupling the coupling member to the vehicle component main body by injection molding the coupling member among the coupling members configured to be coupled, and the protrusion includes: it comprises first protrusions are spaced apart and a second projecting portion, wherein in the second forming step, the contact for suppressing contact of molten resin material against the outer peripheral surface of the component main body said vehicle The restraining member is placed in the cavity of the injection mold. Kick after disposed between the first projecting portion on the outer peripheral surface of the vehicle component body and a second projecting portion, the projecting portion by the molten resin material with injecting the molten resin material into the cavity The gist is to form at least a part of the connecting member so as to surround it.

  According to this method, when the connecting member is molded in the second molding step, the contact of the molten resin material to the outer peripheral surface can be suppressed by the contact suppressing member disposed on the outer peripheral surface of the vehicle component body. It becomes like this. For this reason, it becomes difficult for the heat | fever of molten resin material to move to the components main body for vehicles. Therefore, in the vehicle component body, when one side surface on which the protruding portion is formed is used as a mounting surface to be attached to the mounted portion, and the other side surface which is the back side of the mounting surface is used as the design surface, heat to the design surface is obtained. The influence of can be suppressed.

Further , the contact suppression member can be positioned between the first protrusion and the second protrusion. Furthermore, since the connecting member is formed so as to surround at least two protrusions, a sufficient coupling area between the vehicle component body and the connecting member can be secured.

Invention of Claim 2 makes it a summary to use the resin-made or wooden block-shaped member in the invention of Claim 1 as said contact suppression member.
According to this method, in addition to the heat insulating effect of the resin material or wood, since the injection pressure of the molten resin material is dispersed by forming a block shape, the influence of such heat and pressure on the vehicle component body is suitable. To be reduced.

According to a third aspect of the present invention, there is provided a vehicle component body made of resin and a connecting member for connecting the vehicle component body to a mounting portion on the vehicle side, the connecting member being connected to the connecting tool. In a method for manufacturing a vehicle component comprising a coupling portion for coupling a tool to the vehicle component main body, the vehicle component main body and a cylindrical projecting portion protruding from the outer peripheral surface of the vehicle component main body are integrated. A first molding step for molding, and a second molding step for coupling the connector to the vehicle component body by injection molding of the coupling portion. In the second molding step, the tip of the cylindrical projecting portion The connector is disposed so as to cover the opening, and the cylindrical protrusion is disposed in the cavity of the injection mold, and then the molten resin material is injected into the cavity and the protrusion is caused by the molten resin material. Front to surround the part And summarized in that for molding the coupling portion.

  According to this method, in the second molding step, the molten resin material can be prevented from flowing from the tip opening of the cylindrical protrusion to the inside of the cylindrical protrusion using the connector. . That is, the contact between the outer peripheral surface of the vehicle component main body and the molten resin material inside the cylindrical protrusion is suppressed by the connector. For this reason, it becomes difficult for the heat | fever of molten resin material to move to the components main body for vehicles. Accordingly, in the vehicle component body, when one side surface on which the cylindrical protrusion is formed is used as a mounting surface to be attached to the mounted portion, and the other side surface which is the back side of the mounting surface is used as the design surface, the design surface It becomes possible to suppress the influence of heat on the.

According to a fourth aspect of the present invention, in the third aspect of the present invention, in the second molding step, a part of the coupling tool is inserted into the insertion portion in the cavity, and the tip of the cylindrical protruding portion. The gist is to form the coupling part after fitting the other part of the connector into the fitting recess of the opening.

  According to this method, the insertion tool is inserted into the insertion portion and the fitting of the connection tool into the fitting recess is used to position the injection mold with respect to the cylindrical protrusion, and the tube is moved by the connection tool. It becomes possible to cover the tip opening of the protrusion.

  ADVANTAGE OF THE INVENTION According to this invention, the external appearance defect of the vehicle component main body can be reduced.

(First embodiment)
Hereinafter, a first embodiment in which the present invention is embodied in a method for manufacturing a radiator grill will be described in detail with reference to FIGS.

  As shown in FIG. 1, a radiator grill 11 as a vehicle component is a component provided in front of a radiator (not shown) at the front end of the vehicle, and is also called a front grill. Specifically, it is attached so as to be positioned between the bonnet and the front bumper and between the pair of headlights. The radiator grille 11 attached to the vehicle constitutes a part of the front surface of the vehicle, thereby playing an important role for the design of the front surface of the vehicle in addition to the function of taking outside air into the radiator. Hereinafter, the front and rear of the radiator grille 11 refer to the front and rear based on the state of being attached to the vehicle.

  As shown in FIGS. 1 and 2, a radiator grill 11 is used to connect a radiator grill main body 12 to a horizontally elongated radiator grill main body 12 as a vehicle component main body and a mounted portion (not shown) on the vehicle side. The connecting member 13 is configured. The radiator grill body 12 is made of a resin material, and includes a frame-shaped outer frame portion 12a and a lattice-shaped lattice portion 12b provided inside the outer frame portion 12a. The front surface (front surface) of the radiator grill body 12 is configured as a design surface, while the rear surface (rear surface) of the radiator grill body 12 is configured as a mounting surface. That is, the outer peripheral surface of the radiator grill body 12 includes a design surface and a mounting surface that are in a front-back relationship, and a plurality of connecting members 13 are provided on the mounting surface. As shown in FIG. 2, the connecting member 13 includes a bolt 14 (thread not shown) as a connecting tool for fixing to a mounted portion on the vehicle side, and a connecting portion 15 for connecting the bolt 14 to the radiator grill body 12. And.

Next, a method for manufacturing the radiator grill 11 will be described in detail.
The method of manufacturing the radiator grille 11 includes the first molding step of integrally molding the radiator grill body 12 and the projecting portion projecting from the outer peripheral surface (mounting surface) thereof, and injecting the coupling portion 15 that is a part of the connecting member 13. A second molding step of molding.

  As shown in FIG. 3, the protruding portion 16 formed in the first forming step includes a first protruding portion 17 and a second protruding portion 18 that are provided separately on the mounting surface. The 1st protrusion part 17 and the 2nd protrusion part 18 comprise square plate shape, respectively, and are standingly arranged by the attachment surface so that those plate surfaces may become parallel. Fitting recesses 19 into which the bolts 14 are fitted are formed on the inner sides of the front ends of the first protrusion 17 and the second protrusion 18. More specifically, these fitting recesses 19 are formed by cutting out the extending direction of the first projecting portion 17 and the second projecting portion 18 and the direction orthogonal to the direction, as shown in FIG. The both sides of the square plate-like head portion 14a constituting the bolt 14 are respectively fitted. Examples of the resin material for forming the radiator grill body 12 and the protrusion 16 include ABS resin, AES resin, alloy made of PC (polycarbonate) and ABS resin, and the like. In this embodiment, ABS resin is used. . The radiator grill body 12 and the protruding portion 16 are integrally formed by injection molding using an injection mold (not shown). Such protrusions 16 are provided at a plurality of locations on the radiator grill body 12.

  The second molding step is a step of coupling the bolt 14 to the radiator grill body 12 by injection molding of the coupling portion 15. As shown in FIG. 3, in the second molding step, first, a block-like member 20 as a contact suppressing member is disposed on the mounting surface which is the outer peripheral surface of the radiator grill body 12. The block-shaped member 20 is made of wood and serves to suppress contact of the molten resin material with the mounting surface of the radiator grill body 12. The block-like member 20 is inserted between the first protrusion 17 and the second protrusion 18. More specifically, the block-shaped member 20 has a quadrangular prism shape, and the bottom surface of the block-shaped member 20 (the surface in contact with the mounting surface) is dimensioned to cover the mounting surface between the first projecting portion 17 and the second projecting portion 18. The length of the block-shaped member 20 along the extending direction of the protruding portion 16, that is, the height of the block-shaped member 20 is set to be lower than the tip end portion (fitting concave portion 19) of the protruding portion 16.

  Next, as shown in FIG. 4, the shaft portion 14 b of the bolt 14 is inserted into the insertion portion 52 a in the cavity 52 in the injection mold 51, and the block-shaped member 20 and the protruding portion 16 are disposed in the cavity 52. In this way, the tip surface of the injection mold 51 is brought into contact with the mounting surface. At this time, as shown in FIG. 5, the bolt 14 is positioned at the distal end portion of the protruding portion 16 by fitting the head portion 14 a of the bolt 14 into the fitting recess 19, and for injection molding with respect to the protruding portion 16. The positioning of the mold 51 is also performed. The cavity 52 is set to a size that allows a predetermined gap to be formed between the inner surface of the cavity 52 and the protruding portion 16.

  The injection molding die 51 is provided in an injection molding device, and the injection molding device is further provided with an injection device (not shown) for injecting a molten resin material into the injection molding die 51. This injection device includes an injection plunger and an air cylinder that moves the injection plunger. This injection device is configured to inject a molten resin material by operating an air cylinder when air is supplied from an air supply means provided outside via a vent pipe. The injection molding apparatus configured as described above can be reduced in size and weight and can be moved manually. Therefore, the injection mold 51 can be easily moved to a predetermined position of the radiator grill body 12. As a result, the cavity 52 can be easily aligned with the attachment portion (projecting portion 16) of the connecting member 13, and therefore, when the connecting member 13 is coupled to a plurality of locations of the radiator grill body 12, the second molding is performed. The process can be performed efficiently.

  Next, a molten resin material is injected into the cavity 52 as shown in FIG. Then, the coupling | bond part 15 is shape | molded so that the protrusion part 16 may be surrounded by molten resin material. More specifically, the connecting portion 15 is formed by surrounding the outer peripheral surface of the protruding portion 16 and the head portion 14a of the bolt 14 with a molten resin material. By forming the coupling portion 15, the connecting member 13 including the bolt 14 and the coupling portion 15 is coupled to the radiator grill body 12 via the protruding portion 16. At this time, the block-shaped member 20 is disposed on the mounting surface in the cavity 52. For this reason, as a result of the contact area between the mounting surface and the molten resin material being reduced by the block-shaped member 20, the heat of the molten resin material is less likely to move to the radiator grill body 12. That is, the amount of heat transferred from the molten resin material to the radiator grill body 12 can be reduced. At this time, since the coupling portion 15 is molded so as to surround the protruding portion 16 with the molten resin material, the coupling strength between the coupling portion 15 and the protruding portion 16, that is, the coupling between the coupling portion 15 and the radiator grill body 12. The strength is sufficiently secured. At this time, since the height of the block-shaped member 20 is set lower than the tip portions of the projecting portions 17 and 18, the inner surfaces of the tip portions of the projecting portions 17 and 18 are also surrounded by the molten resin material. Become. Thereby, the joint strength between the coupling portion 15 and the protruding portion 16 is further improved. In addition to the resin material forming the radiator grill body 12, the resin material forming the coupling portion 15 is, for example, an olefin resin such as polyethylene (PE) or polypropylene (PP), or an ester such as polyethylene terephthalate (PET). In this embodiment, PP is used.

  After the coupling portion 15 thus formed is cooled and solidified, the coupling portion 15 is removed from the injection mold 51, whereby the coupling member 13 is coupled to the radiator grill body 12 as shown in FIG. The radiator grill 11 can be obtained. By performing the second molding step a plurality of times in accordance with the location where the protrusions 16 are formed, the radiator grill 11 in which the plurality of connecting members 13 are coupled to the radiator grill body 12 is manufactured.

The effects exhibited by the first embodiment are described below.
(1) In the method of manufacturing the radiator grille 11 according to the present embodiment, after the block-shaped member 20 is arranged on the mounting surface in the cavity 52 in the second molding step, the coupling portion 15 is surrounded by the projecting portion 16. Molding. According to this method, when the coupling portion 15 is molded in the second molding step, the contact of the molten resin material with the mounting surface is suppressed by the block-shaped member 20. For this reason, it becomes difficult for the heat of the molten resin material to move to the radiator grill body 12. Therefore, it becomes possible to suppress the influence of heat on the design surface which is the back side of the mounting surface. As a result, the appearance defect of the radiator grill body 12 can be reduced. In particular, when the decorative surface such as painting or plating is applied to the design surface, glossiness and color expression by the decorative processing can be sufficiently exhibited.

  Furthermore, since the coupling portion 15 is formed so as to surround the protruding portion 16, the coupling strength between the radiator grill body 12 and the connecting member 13 is sufficiently ensured. As a result, when attaching the radiator grille 11 to the attachment portion by the connecting member 13, the radiator grille 11 can be made difficult to come off. That is, even when the coupling area between the radiator grill body 12 and the coupling portion 15 is reduced by the arrangement of the block-shaped member 20, the coupling strength between the radiator grill body 12 and the coupling member 13 can be sufficiently ensured. It becomes like this.

  (2) The projecting portion 16 includes a first projecting portion 17 and a second projecting portion 18, and the block-shaped member 20 is disposed between the first projecting portion 17 and the second projecting portion 18. According to this method, the block-shaped member 20 can be positioned between the first protrusion 17 and the second protrusion 18. For this reason, as a result of being able to arrange | position the block-shaped member 20 in the cavity 52 easily, a 2nd shaping | molding process can be performed efficiently. Further, since the connecting member 13 is formed so as to surround at least the two projecting portions 17 and 18, a sufficient coupling area between the radiator grill body 12 and the coupling portion 15 can be secured. As a result, the coupling strength between the radiator grill body 12 and the connecting member 13 can be more sufficiently secured.

  (3) Since the wooden block-like member 20 is used as a contact suppressing member, the heat and pressure of the molten resin material are suitably interrupted. That is, in addition to the heat insulating effect of wood, the injection pressure of the molten resin material is dispersed by forming a block shape, and the influence of such heat and pressure on the radiator grill body 12 is suitably reduced. Therefore, the appearance defect of the radiator grill body 12 can be further reduced.

  (4) The 1st protrusion part 17 and the 2nd protrusion part 18 make plate shape, respectively, and each protrusion part 17 and 18 protrudes in the same direction from the attachment surface. That is, the protrusion 16 is set to a shape without an undercut portion. As a result, in the first molding step, it is very easy to integrally mold the radiator grill body 12 and the protrusion 16 using the injection mold 51.

  Here, even if the radiator grill body 12 is designed to have a shape without an undercut portion, if the projecting portion 16 has a structure having an undercut portion, a slide core type injection mold 51 is formed in the first molding step. Will be used. When the slide core type injection mold 51 is used, the resin material that has flowed into a minute gap between the slide core and the mold body may generate resin powder as the slide core moves. Such adhesion of the resin powder to the design surface of the radiator grill body 12 contributes to the appearance failure of the radiator grill body 12. Since the protrusion part 16 of this embodiment is a shape without an undercut part, the external appearance defect of the radiator grille body 12 resulting from such a slide core can also be reduced. In addition, when forming the fitting recessed part 19 in the protrusion part 16, by forming in the shape notched in the extending direction of the 1st protrusion part 17 and the 2nd protrusion part 18, and the direction orthogonal to the direction, It becomes possible to make the shape without a cut portion.

(Second Embodiment)
Next, a second embodiment in which the present invention is similarly embodied in a method for manufacturing the radiator grill 11 will be described in detail with reference to FIGS. In the second embodiment, portions having the same shape as the radiator grill 11 of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted, and description of the same material is also omitted.

The method for manufacturing the radiator grille 11 includes a first molding step for molding the radiator grill body 12 and a second molding step for injection molding the coupling portion 31 that is a part of the connecting member 13.
The first molding step is a step of integrally molding the radiator grill body 12 and the cylindrical projecting portion 32 projecting from the outer peripheral surface (attachment surface) of the radiator grill body 12 as shown in FIG. The cylindrical projecting portion 32 is formed in a square cylindrical shape from a pair of opposing first projecting walls 33 and a second projecting wall 34 that is also opposed and connects both side portions of the first projecting wall 33. A fitting recess 35 into which the head 14 a of the bolt 14 is fitted is formed on the inner side of the distal end portion of the first protruding wall 33. These fitting recesses 35 are formed so as to be cut out in the extending direction of the first projecting wall 33 and the direction orthogonal to the direction, and both sides of the head portion 14a of the bolt 14 indicated by a two-dot chain line in FIG. It is comprised so that a part may each be fitted. On the other hand, the second projecting wall 34 has a thin plate shape that is thinner than the first projecting wall 33, and the both sides of the base end side of the first projecting wall 33 at both sides closer to the base end than the center part. It is integrally formed. That is, a slit-like gap 36 is formed between both side portions on the tip side of the center portion of the second projecting wall 34 and both side portions on the tip side of the first projecting wall 33. The second projecting walls 34 are set to have a thickness that is deformed by the flow of the molten resin material to be injected when the coupling portion 31 is injection-molded in the second molding step. The length of the second projecting wall 34 in the extending direction, that is, the height of the second projecting wall 34 is lower than the length of the first projecting wall 33 in the extending direction, that is, the height of the first projecting wall 33. It is set.

  The second molding step is a step of coupling the bolt 14 to the radiator grill body 12 by injection molding the coupling portion 31. As shown in FIG. 8, in the second molding step, first, the shaft portion 14 b which is a part of the bolt 14 is inserted into the insertion portion 52 a in the cavity 52, and the cylindrical protruding portion 32 is disposed in the cavity 52. Thus, the tip surface of the injection mold 51 is brought into contact with the mounting surface. At this time, the bolt 14 is disposed so as to cover the tip opening of the cylindrical protrusion 32. More specifically, the head 14 a which is the other part of the bolt 14 is fitted into the fitting recess 35, so that it is positioned at the distal end portion of the cylindrical protrusion 32. In this way, while positioning the injection mold 51 with respect to the cylindrical protruding portion 32 using the insertion of the shaft portion 14b into the insertion portion 52a and the fitting of the head portion 14a into the fitting recess 35, The tip opening of the cylindrical protrusion 32 can be covered by the head 14a.

  Next, a molten resin material is injected into the cavity 52 as shown in FIG. Then, the coupling | bond part 31 is shape | molded so that the cylindrical protrusion part 32 may be surrounded by molten resin material. In detail, the outer peripheral surface of the cylindrical projecting portion 32 and a part of the head portion 14a are surrounded by the coupling portion 31 with the molten resin material, so that the connecting member 13 composed of the bolt 14 and the coupling portion 31 is a cylinder. The radiator grille body 12 is coupled via the protruding portion 32. At this time, since the tip opening of the cylindrical protrusion 32 is covered by the head 14a, the molten resin material is prevented from flowing from the tip opening of the cylindrical protrusion 32 into the cylindrical protrusion 32. can do. For this reason, as a result of the molten resin material contacting the mounting surface being reduced, the amount of heat transferred from the molten resin material to the radiator grill body 12 is reduced. At this time, the second projecting wall 34 is deformed so as to be bent inward of the cylindrical projecting portion 32 by the flow of the molten resin material, that is, the heat and pressure of the molten resin material. More specifically, each of the second projecting walls 34 is deformed so that the tip side thereof approaches, and a part of the molten resin material is cylindrical from the gap 36 between the first projecting wall 33 and the second projecting wall 34. It flows into the inside of the protrusion 32. In addition, since the height of the second protruding wall 34 is lower than the height of the first protruding wall 33 and a gap is formed between the tip of the second protruding wall 34 and the head portion 14a, one part of the molten resin material is used. The part flows into the inside of the cylindrical protrusion 32 from the gap. It should be noted that the molten resin material that has flowed into the inside of the cylindrical projecting portion 32 in this way only partially surrounds the inside of the deformed portion of the second projecting wall 34. That is, the height of the first projecting wall 33, the injection conditions, and the like are adjusted so that the molten resin material flowing into the inside of the cylindrical projecting portion 32 does not reach the mounting surface inside the cylindrical projecting portion 32.

  After the coupling portion 31 formed in this way is cooled and solidified, it is removed from the injection mold 51 so that the radiator grille 11 in which the coupling member 13 is coupled to the radiator grill body 12 as shown in FIG. Obtainable. At this time, the second projecting wall 34 is deformed to the inside of the cylindrical projecting portion 32, and the inside of the deformed portion of the second projecting wall 34 is partially surrounded by the resin material. For this reason, the deformed portion of the second projecting wall 34 having an undercut structure functions as a stopper for the coupling portion 31.

The effects exhibited by the second embodiment will be described below.
(5) In the manufacturing method of the radiator grille 11 according to the present embodiment, the bolt 14 is arranged to cover the tip opening of the cylindrical protrusion 32 in the second molding step, and then the cylindrical protrusion 32 is surrounded. The coupling portion 31 is formed. According to this method, it is possible to use the bolt 14 to suppress the molten resin material from flowing into the inside of the cylindrical projecting portion 32 from the tip opening portion of the cylindrical projecting portion 32. That is, the contact between the outer peripheral surface of the radiator grill body 12 and the molten resin material inside the cylindrical protrusion 32 is suppressed by the bolt 14. For this reason, it becomes difficult for the heat | fever of molten resin material to move to the components main body for vehicles. As a result, the appearance defect of the radiator grill body 12 can be reduced. In particular, when the decorative surface such as painting or plating is applied to the design surface, glossiness and color expression by the decorative processing can be sufficiently exhibited.

  Furthermore, since the coupling portion 31 is formed so as to surround the cylindrical projection portion 32, the coupling strength between the radiator grill body 12 and the connecting member 13 is sufficiently ensured. As a result, when attaching the radiator grille 11 to the attachment portion by the connecting member 13, the radiator grille 11 can be made difficult to come off. That is, even if the coupling area between the radiator grill body 12 and the coupling portion 31 is reduced by covering the tip opening of the cylindrical projecting portion 32 with the bolt 14, the coupling between the radiator grill body 12 and the connecting member 13 is reduced. A sufficient bonding strength can be secured.

  (6) In the second molding step, the shaft portion 14 b is inserted into the insertion portion 52 a in the cavity 52, and the head portion 14 a is fitted into the fitting recess 35. According to this method, while positioning the injection mold 51 with respect to the cylindrical projecting portion 32 using the insertion of the attachment portion to the insertion portion 52a and the fitting of the coupling tool to the fitting recess 35, The front end opening of the cylindrical protrusion 32 can be covered with the connector. For this reason, a 2nd shaping | molding process can be performed efficiently.

  (7) A slit-like gap 36 is formed between the first projecting wall 33 and the second projecting wall 34, and the second projecting wall 34 is configured to be deformed by the flow of the injected molten resin material. ing. In the second molding step, each second protruding wall 34 is deformed so that the tip side of each second protruding wall 34 approaches due to the flow of the molten resin material. Therefore, an undercut structure is formed by the deformed portion of the second projecting wall 34, and the deformed portion functions as a retaining portion for the coupling portion 31. Therefore, the coupling strength between the radiator grill body 12 and the connecting member 13 can be more sufficiently ensured.

  (8) The first projecting wall 33 and the second projecting wall 34 each have a plate shape, and each projecting wall projects from the mounting surface in the same direction. That is, since each protruding wall is set to a shape without an undercut portion, the same effect as described in (4) of the first embodiment can be obtained.

(Modification)
The embodiment may be modified as follows.
-The block-like member 20 of the first embodiment may be changed to a block shape other than a quadrangular prism shape. For example, a block shape having a concave portion such as a U-shaped cross section may be used. Furthermore, a plate-like member, a sheet-like member, or the like can be used as a contact suppressing member other than the block-like member 20.

  -You may comprise the contact suppression member of 1st Embodiment from materials other than wood. That is, it is possible to use a contact suppressing member made of a resin material. Further, as the form of the resin material, a foam, a fiber aggregate, or the like can be used in consideration of heat insulation of the molten resin material with respect to heat and buffering property against the pressure of the molten resin material.

In the second molding step of the first embodiment, an injection mold 51 having a slide core may be used, and the slide core may be used as a contact suppressing member .

-You may change the shape of the protrusion part 16 of 1st Embodiment into other shapes, such as a column shape and a cylinder shape.
-You may shape | mold the whole connection member 13 in the 2nd shaping | molding process of 1st Embodiment. That is, the connecting member 13 may be constituted by a resin-made connecting tool and a coupling part, and the connecting tool and the coupling part may be integrally molded in the second molding step.

  -You may change the volt | bolt 14 as a connection tool of each embodiment into other connection tools, such as a clip. Further, the connector includes a locking member for locking the bolt 14 in addition to a fastening member such as the bolt 14. That is, the engaging members 15 and 31 are formed by insert molding in which the engaging member is inserted into the cavity 52, thereby connecting the engaging member to the radiator grill body 12. Then, the bolt 14 is locked to the locking member, and the bolt 14 is fastened to the mounted portion on the vehicle side, thereby connecting the radiator grill body 12 to the mounted portion.

  -You may abbreviate | omit the fitting recessed part 35 of 2nd Embodiment. That is, the coupling portion 31 may be formed so as to cover the tip opening of the cylindrical protrusion 32 by contacting the head 14 a of the bolt 14 with the tip surface of the cylindrical protrusion 32.

  -You may comprise the cylindrical protrusion part 32, without providing the clearance gap 36 between the 1st protrusion wall 33 and the 2nd protrusion wall 34 of 2nd Embodiment. Furthermore, the thickness of the 1st protrusion wall 33 and the 2nd protrusion wall 34 may be the same. That is, the coupling portion 31 may be formed without deforming the second protruding wall 34 in the second forming step.

-You may change the cylindrical protrusion part 32 of 2nd Embodiment into the cylindrical protrusion part 32 which makes other shapes, such as cylindrical shape and a triangular cylinder shape.
The manufacturing method of each embodiment may be applied to vehicle parts other than the radiator grille 11, for example, vehicle exterior parts such as a back door panel, or may be applied to a vehicle interior part that constitutes an instrument panel or the like. Good. The number of connecting members 13 in each embodiment may be changed as appropriate according to the size of such vehicle components.

Further, the technical idea that can be grasped from the embodiment will be described below.
The cylindrical projecting portion is constituted by a plurality of projecting walls, and in the second molding step, at least one of the projecting walls is deformed by the flow of the molten resin material. A method for manufacturing a vehicle component according to claim 1. According to this method, since the undercut structure is formed by the deformed protruding wall, such a deformed portion functions as a retaining member for the connecting member, and as a result, the coupling strength between the vehicle component body and the connecting member is increased. be able to.

The front view which shows the radiator grille of 1st Embodiment. The perspective view which shows the connection part of a radiator grille. The perspective view which shows the connection part and block-shaped member of a radiator grill after a 1st shaping | molding process. Sectional drawing which shows the state before arrange | positioning the metal mold | die for injection molding in a 2nd shaping | molding process. Sectional drawing which shows the state which has arrange | positioned the metal mold | die for injection molding in a 2nd shaping | molding process. Sectional drawing which shows the state which injected the molten resin material to the cavity in the 2nd shaping | molding process. The perspective view which shows the connection part and bolt of a radiator grill after the 1st shaping | molding process of 2nd Embodiment. Sectional drawing which shows the state which has arrange | positioned the metal mold | die for injection molding in a 2nd shaping | molding process. Sectional drawing which shows the state which injected the molten resin material in the 2nd shaping | molding process. Sectional drawing which shows the connection part of the radiator grille after a 2nd shaping | molding process.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Radiator grill as vehicle parts, 12 ... Radiator grill main body as vehicle parts main body, 13 ... Connection member, 14 ... Bolt as connection tool, 15, 31 ... Connection part, 16 ... Projection part, 17th DESCRIPTION OF SYMBOLS 1 protrusion part, 18 ... 2nd protrusion part, 19, 35 ... fitting recessed part, 20 ... Block-shaped member as a contact suppression member, 32 ... Cylindrical protrusion part, 51 ... Injection mold, 52 ... Cavity, 52a ... insertion part.

Claims (4)

In a vehicle component manufacturing method comprising: a resin vehicle component main body; and a connecting member for connecting the vehicle component main body to a mounted portion on a vehicle side.
A first molding step of integrally molding the vehicle component body and a protruding portion projecting from the outer peripheral surface of the vehicle component body;
The connecting member is coupled to the vehicle component main body by injection molding of the connecting member including a connecting member and a connecting portion that couples the connector to the vehicle component main body. Including a second molding step,
The protrusion includes a first protrusion and a second protrusion that are provided apart from each other.
In the second molding step, the contact prevention member for preventing the contact of the molten resin material against the outer peripheral surface of the component main body the vehicle, the outer periphery of said component body for a vehicle in injection mold cavity after disposed between the first projection and second projection on the surface, the connecting member so as to surround the protruding portions by the molten resin material with injecting the molten resin material into the cavity A method for manufacturing a vehicle component, characterized in that at least a part thereof is molded. The method for manufacturing a vehicle component according to claim 1 , wherein a resin block or a wooden block member is used as the contact suppressing member. A vehicle component body made of resin and a connecting member for connecting the vehicle component body to a mounted portion on the vehicle side, the connecting member coupling the connector and the connector to the vehicle component body In a method for manufacturing a vehicle component comprising a coupling portion that performs
A first molding step of integrally molding the vehicle component body and a cylindrical projecting portion projecting from an outer peripheral surface of the vehicle component body;
A second molding step of coupling the connector to the vehicle component body by injection molding of the coupling portion;
In the second molding step, the connector is arranged to cover the tip opening of the cylindrical projecting portion, and the cylindrical projecting portion is arranged in the cavity of the injection mold, and then in the cavity. A method for manufacturing a vehicle component, comprising injecting a molten resin material and forming the joint portion so as to surround the protruding portion with the molten resin material. In the second molding step, a part of the coupling tool is inserted into the insertion part in the cavity, and the other part of the coupling tool is fitted into the fitting recess of the tip opening of the cylindrical protrusion. The method for manufacturing a vehicle component according to claim 3 , wherein the connecting portion is formed later .

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