JP2014061767A - Large-sized resin molding for vehicle, and method of manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a large-sized resin molding for a vehicle, which enables high-precision molding of an attachment location for being attached to a vehicle body, and a method of manufacturing the same.SOLUTION: A bumper 11 includes: a bumper body 13; one fixing part molding 15 that is integrally attached to the bumper body 13 by secondary resin molding; and a pair of clips 17 that are molded integrally with the fixing part molding 15 in the secondary resin molding and that are mutually arranged in predetermined relative positions depending on a pair of attachment holes 39 of a vehicle body 37 subjected to the attachment of the bumper body 13.

Description

  The present invention relates to a large-sized resin molded product for a vehicle and a method for manufacturing the same.

For example, large plastic molded products for vehicles such as bumpers, door trims, roof panels, and instrument panels are molded integrally with mounting holes, projecting pieces, clips, etc. May be.
For example, in the bumper mounting structure disclosed in Patent Document 1, as shown in FIG. 7, three upper mounting holes 505 are provided at the upper edge of the rear bumper 503 mounted on the rear portion of the vehicle body 501. Two side attachment holes 507 are formed in the side, and lower attachment holes 511 are formed in the projecting pieces 509 provided in two places in the lower part.

  As shown in FIG. 8A, the upper attachment hole 505 is attached to a rear skirt panel 515 disposed below the back door opening 513 on the vehicle body side. That is, the rear skirt panel 515 is provided with a hole through which the bolt 517 passes, and a nut 519 is welded to the inside of the hole. On the other hand, the rear bumper 503 has an upper edge portion erected upward, and an upper mounting hole 505 is provided there. The upper mounting hole 505 of the rear bumper 503 is fixed by a bolt 517 and a nut 519.

  As shown in FIG. 8B, the side portion attaching hole 507 is attached to the lower portion of the side body outer panel 521 of the vehicle body 501. A lower portion of the side body outer panel 521 is provided with a mounting bottom portion 523 oriented substantially horizontally inside the vehicle body 501, and a hole through which the clip 525 passes is formed. On the other hand, on the rear surface side of the rear bumper 503, a surface is provided so as to face the mounting bottom portion 523, and a side mounting hole 507 is provided on this surface. In this way, at both ends of the rear bumper 503, the side attachment holes 507 are fixed to the attachment bottom 523 by the clips 525.

  As shown in FIG. 8C, the lower attachment hole 511 is attached to an attachment flange piece 529 provided at the lower part of the rear comba outer panel 527 of the vehicle body 501. The mounting flange piece 529 is provided with a hole that protrudes in a substantially horizontal direction from the lower portion of the rear comba outer panel 527 to the rear side of the vehicle body 501 and allows the clip 525 to pass therethrough. The protruding piece 509 of the rear bumper 503 protrudes in the front side and the horizontal direction of the vehicle body 501 so as to face the mounting flange piece 529. In the rear bumper 503, the protruding piece 509 is overlapped with the lower portion of the mounting flange piece 529, and the lower mounting hole 511 is fixed to the mounting flange piece 529 by the clip 525.

JP 2000-103302 A

  However, in the above-described mounting structure for a large-sized resin molded product for a vehicle, the upper mounting hole 505, the side mounting hole 507, the protruding piece 509, and the lower mounting hole 511 have a vehicle body 501 due to a molding error that occurs during resin molding. May not match the mounting location (nut 519, mounting bottom 523, mounting flange piece 529). That is, as shown in FIG. 9, the mounting holes 531 drilled in the vehicle body 501 by sheet metal processing have a tolerance of ± 0.15 mm when the separation length A1 is 700 mm, for example. On the other hand, in the case of a large-sized resin molded product for vehicles having an overall length L = 1300 mm, the accuracy of ± 3 mm is limited when the separation length A2 of the clip 535 is 700 mm. Even in this case, at the time of resin molding, it is necessary to observe about 20 manufacturing management items such as molding pressure and injection speed, so that productivity is poor and much effort is required to improve accuracy. Even if such labor is spent, the current defect rate is as high as about 10%, and further improvement in yield is desired.

  The present invention has been made in view of the above situation, and an object of the present invention is to provide a large-sized resin molded product for a vehicle that can improve productivity and can accurately mold a plurality of fixing portions for attachment to a vehicle body. It is in providing the manufacturing method.

The above object of the present invention is achieved by the following configuration.
(1) a large resin molded product main body, one fixed part molded body that is integrally attached to the large resin molded product main body by secondary resin molding, and is integrally molded to the fixed part molded body during the secondary resin molding, A large-sized resin molded product for a vehicle, comprising: a plurality of fixing portions arranged at predetermined relative positions according to a plurality of fixed portions of a vehicle body to which the main body of the large-sized resin molded product is attached.

  According to the large-sized resin molded product for vehicles having the configuration of (1) above, the large-sized resin molded product main body is primarily molded, and in this primary molding, molding accuracy when molding a normal large-sized resin molded product is allowed. . Therefore, it is not necessary to set many manufacturing management items for realizing high accuracy when molding a large resin molded product body. That is, productivity can be improved. On the other hand, one fixed part molded body is attached to the main body of the large-sized resin molded product that has been primarily molded by secondary resin molding (attached as attached). In this secondary resin molding, it is possible to mold the fixed part molded body in a small part size that covers a plurality of fixed parts having a predetermined relative positional relationship, and variations in molding accuracy due to shrinkage and sink marks of the molded resin material. Less. Thereby, the relative positional accuracy of the some fixing | fixed part in the large sized resin molded product for vehicles can be made high.

(2) a large-sized resin molded product body, a plurality of fixed-portion molded bodies that are integrally attached to the large-sized resin molded product body by secondary resin molding, and the fixed-portion molded body are integrally molded during the secondary resin molding, A large-sized resin molded product for a vehicle, comprising: at least one fixing portion arranged at a predetermined relative position according to a plurality of fixed portions of a vehicle body to which the main body of the large-sized resin molded product is attached.

According to the large-sized resin molded product for vehicles having the configuration of (2) above, the large-sized resin molded product body is primarily molded, and in this primary molding, molding accuracy when molding a normal large-sized resin molded product is allowed. . Therefore, it is not necessary to set many manufacturing management items for realizing high accuracy when molding a large resin molded product body. That is, productivity can be improved. On the other hand, a plurality of fixed part molded bodies are attached to the main body of the large molded resin product that has been primarily molded by secondary resin molding. In this secondary resin molding, it is possible to mold each of the fixed part moldings in a small part size that covers at least one fixed part in a predetermined relative positional relationship, and the molding accuracy due to shrinkage or sink of the molded resin material can be improved. Variations are reduced. Thereby, the relative positional accuracy of the some fixing | fixed part in the large sized resin molded product for vehicles can be made high.
(3) In accordance with a plurality of fixed parts of a vehicle body to which a large resin molded product main body having at least one fixed part molded body seat for attaching a fixed part molded body is attached, mutual arrangement at predetermined relative positions A method for producing a large-sized resin molded product for a vehicle, wherein the fixed part molded body having a fixed part is attached to the fixed part molded body seat by secondary resin molding.

According to the method for manufacturing a large-sized resin molded product for vehicles having the configuration of (3) above, in a large-sized resin molded product main body that is primarily molded, molding accuracy when a normal large-sized resin molded product is molded is allowed. Therefore, it is not necessary to set many manufacturing control items in order to achieve high accuracy when molding a large resin molded product body. That is, productivity can be improved. On the other hand, a fixed part molded body is attached to the at least one fixed part molded body seat portion of the primary molded large resin molded product main body by secondary resin molding. In this secondary resin molding, it is possible to mold a fixed part molded body in a small part size that covers a plurality of fixed parts in a predetermined relative positional relationship, and there is little variation in molding accuracy due to shrinkage or sink marks of the molded resin material. Become.
For example, there is a thick part in the large resin molded product body, and in the case of resin with little heat conduction to the mold, it takes time to cool down in the thick part, and warpage occurs due to internal stress due to this difference in cooling time, and dimensions Accuracy is reduced. On the other hand, the fixed part molded body having a small part size that does not have a thick part has a small decrease in dimensional accuracy, and the relative positional accuracy of the fixed part is increased. Thereby, the large sized resin molded product for vehicles in which the some fixing | fixed part is arrange | positioned with high relative positional accuracy is obtained.

(4) A method for manufacturing a large-sized resin molded article for vehicles having the configuration of (3) above, wherein the relative position is different from at least the relative position, shape, or number of moldings of the large-sized resin molded article body having the same shape. A method for producing a large-sized resin molded product for a vehicle, wherein the fixed portion molded body having a fixed portion is attached by secondary resin molding.

  According to the method for manufacturing a large-sized resin molded article for a vehicle having the configuration of (4) above, the fixed part molded body provided with the fixed parts having different relative positions among the relative position, shape, or number of moldings according to the specifications is large. Secondary resin molding is performed on the resin molded product body to obtain a desired type of large-sized resin molded product for vehicles. Thereby, until a secondary molding process, only a large-sized resin molded product main body becomes a kind of component management. Then, while supplying the same large resin molded product body, for each production lot that is flowed to the production line, a desired fixed part molded body is molded into a secondary resin on the large resin molded product body, and it fits the production lot. Different types of large resin molded products for vehicles can be finished.

  According to the large-sized resin molded product for a vehicle and the method for manufacturing the same according to the present invention, productivity can be improved, and a plurality of fixing portions for attachment to the vehicle body can be molded with high accuracy.

  The present invention has been briefly described above. Further, the details of the present invention will be further clarified by reading through a mode for carrying out the invention described below (hereinafter referred to as “embodiment”) with reference to the accompanying drawings. .

It is a horizontal sectional view of the large-sized resin molded product for vehicles concerning a 1st embodiment of the present invention. It is a whole perspective view of a secondary resin molding machine. It is a schematic sectional drawing showing the condition at the time of the secondary shaping | molding using the metal mold | die by the secondary resin molding machine shown in FIG. It is a schematic sectional drawing showing the attachment condition to the vehicle body of the large sized resin molded product for vehicles shown in FIG. It is a schematic sectional drawing showing the condition at the time of the secondary shaping | molding of the large sized resin molded product for vehicles which concerns on 2nd Embodiment of this invention. (A)-(c) is a principal part expanded sectional view which shows the modification of the fixing | fixed part molded object seat part which concerns on other embodiment of this invention, and a fixing | fixed part molded object. It is a schematic perspective view which shows the rear part of the motor vehicle in which the conventional rear bumper is attached. (A) is sectional drawing which shows the attachment structure of the upper attachment hole part of the conventional rear bumper, (b) is sectional drawing which shows the attachment structure of the side part attachment hole part of the conventional rear bumper, (c) is the conventional rear It is sectional drawing which shows the attachment structure of the lower attachment hole part of a bumper. (A) is a schematic diagram of a vehicle body provided with a mounting hole, and (b) is a schematic diagram of a bumper provided with a clip.

Embodiments according to the present invention will be described below with reference to the drawings.
(First embodiment)
As shown in FIG. 1, a bumper 11 that is a large-sized resin molded product for a vehicle according to the first embodiment of the present invention includes a bumper main body 13 that is a large-sized resin molded product main body, a fixed portion molded body 15, and a fixed portion. A certain clip 17. The bumper 11 may be either a front bumper or a rear bumper, and is formed of a synthetic resin. In this embodiment, an example in which the vehicular large resin molded product is the bumper 11 will be described. However, the vehicular large resin molded product may be a door trim, an instrument panel, a roof panel, a spoiler, or the like. Good.

  The bumper 11 according to the first embodiment is formed by attaching a single fixed portion molded body 15 to the bumper body 13 by secondary resin molding. That is, a large number of bumper bodies 13 having the same shape are formed by primary molding using a normal large resin molding method. The bumper main body 13 is formed with one fixed portion molded body seat portion 19 (see FIG. 3). The fixed portion molded body seat portion 19 according to the first embodiment has engagement grooves 25 that are cut out on the outer side in the groove width direction on the left and right groove walls 23 of the concave portion 21 formed inside the bumper body 13. It is formed. The concave portion 21 is filled with a molding resin by the secondary resin molding machine 27 shown in FIG. The molten resin filled in the concave portion 21 enters the engagement groove 25 and becomes the engagement flange portion 29 of the fixed portion molded body 15. Thereby, the fixed part molded body 15 after the secondary resin molding is fixed to the bumper body 13 with high strength by the engagement flange 29 engaging with the engagement groove 25.

  A plurality of (two in the first embodiment) clips 17 are formed on one fixed portion molded body 15 that is integrally attached to the bumper body 13 by secondary resin molding. The clip 17 is formed by secondary resin molding by a plurality of (two in the first embodiment) fixing portion cavities 35 (see FIG. 3) provided in the upper mold 33 of the mold 31 used in the secondary resin molding machine 27. Sometimes integrally molded. Each clip 17 molded at the time of secondary resin molding is positioned at a predetermined relative position according to a pair of mounting holes 39 which are a plurality of fixed portions of a vehicle body 37 (see FIG. 4) to which the bumper body 13 is mounted. Has been placed.

Next, a method for manufacturing the bumper 11 according to the first embodiment will be described.
The manufacturing method of the bumper 11 according to the first embodiment includes a pair of mounting holes 39 of the vehicle body 37 to which the bumper main body 13 having one fixed portion molded body seat portion 19 for attaching the fixed portion molded body 15 is mounted. Accordingly, there is included a step in which the fixed portion molded body 15 having the two clips 17 arranged at predetermined relative positions is attached to the fixed portion molded body seat portion 19 of the bumper body 13 by secondary resin molding.

Here, as shown in FIG. 2, the secondary resin molding machine 27 for molding the fixed portion molding 15 on the bumper body 13 is a micro molding machine that can be operated by one worker without external power such as an electric motor. The mold 31 is composed of a mold clamping device (not shown) and an injection molding machine 41 for injecting molten resin into the mold 31 under pressure.
The injection molding machine 41 has a heating cylinder 43 provided with a heater for heating and melting synthetic resin such as polypropylene, a plunger 45 for injecting the molten resin in the heating cylinder 43 from a nozzle (not shown), and the plunger 45 is advanced. An injection cylinder 47 to be driven, a handle 49 for driving the injection cylinder 47, and a temperature controller 51 for maintaining the heating temperature of the heating cylinder 43 at a desired temperature. It is supported by.

  Note that the micro molding machine in this embodiment has a maximum amount of resin that can be molded by one injection molding of about 10 g, and when the mold 31 is clamped, an air cylinder or a link is attached. It can be used manually. Therefore, the injection molding machine 41 as a micro molding machine may drive the injection cylinder 47 by external power such as an electric motor or air.

The mold 31 is a horizontal split mold having a lower mold 57 and an upper mold 33. As shown in FIG. 3, the upper surface of the lower mold 57 of the mold 31 is along the outer contour of the bumper body 13. A formed main body fixing portion 59 is provided. The lower mold 57 faces the upper mold 33, and the upper mold 33 includes the fixed part cavity 35 formed along the outer shape of the fixed part molded body 15. The mold 31 is formed by combining the lower mold 57 and the upper mold 33, thereby forming a molding space 61 in which the concave portion 21 of the bumper body 13 and the fixed portion cavity 35 are integrated. The molding space 61 is melted from the gate 40. The fixed portion molded body 15 is integrated with the bumper body 13 by injecting the resin. The capacity of the molding space 61 when the mold 31 is clamped is several cm ³ . In the present embodiment, the mold 31 is described as being a horizontal split mold, but it may be a vertical split mold.

  The fixed portion molded body 15 according to the first embodiment is formed as a separate component from the large bumper body 13 and is compactly spot-formed with respect to the bumper body 13. Thereby, the metal mold | die 31 can be small and the use of a micro molding machine is possible. Then, the bumper body 13 and the fixed portion molded body 15 are integrated by secondary resin molding, whereby the bumper 11 including a pair of clips 17 whose relative positions are arranged with high accuracy is manufactured. As a result, the clip 17 of the bumper 11 can be positioned with high accuracy even with respect to the pair of mounting holes 39 formed in the vehicle body 37 by sheet metal processing.

  Further, in the method for manufacturing the bumper 11 according to the first embodiment, the bumper main body 13 having the same shape is fixed to the bumper body 13 having a pair of clips 17 having a relative position, a shape, or a number that is different from each other according to specifications. Bumpers 11 having different specifications can be obtained by attaching the part molded body 15 by secondary resin molding. That is, in the production line, the bumper 11 can be completed by attaching a desired fixed portion molding 15 made of a synthetic resin material to the bumper body 13 according to the type of the bumper 11 by secondary resin molding.

Next, the operation of the bumper 11 having the above configuration will be described.
In the bumper 11 of the first embodiment, the bumper body 13 is primarily molded, and in this primary molding, the molding accuracy when molding a normal bumper is allowed. Therefore, it is not necessary to set many manufacturing control items for realizing high accuracy when the bumper body 13 is molded. That is, productivity can be improved. On the other hand, the primary molded bumper body 13 is provided with one fixed portion molded body 15 by a secondary resin molding machine 27. In this secondary resin molding, it is possible to mold the fixed part molded body 15 with a small component size covering a pair of clips 17 in a predetermined relative positional relationship, and there is a variation in molding accuracy due to shrinkage and sink marks of the molded resin material. Less. Thereby, the relative positional accuracy of the pair of clips 17 in the bumper 11 can be increased.

Next, the effect | action of the manufacturing method of the bumper 11 is demonstrated.
In the bumper 11 manufacturing method according to the first embodiment, in the bumper body 13 that is primarily molded, molding accuracy when a normal bumper is molded is allowed. Therefore, it is not necessary to set many manufacturing control items in order to achieve high accuracy when the bumper body 13 is molded. That is, productivity can be improved. On the other hand, a fixed portion molded body 15 is attached to one fixed portion molded body seat 19 of the bumper body 13 that has been primarily molded by a secondary resin molding machine 27. In this secondary resin molding, it is possible to mold the fixed part molded body 15 with a small component size covering a pair of clips 17 in a predetermined relative positional relationship, and there is a variation in molding accuracy due to shrinkage and sink marks of the molded resin material. Less. For example, the bumper body 13 has a thick part, and a resin with little heat conduction to the mold takes time to cool the thick part, and internal stress due to the difference in the cooling time causes warping and the dimensional accuracy. descend. On the other hand, in the fixed part molded body 15 having a small part size that does not have a thick part, such a decrease in dimensional accuracy is small, and the relative positional accuracy of the pair of clips 17 is increased. Thereby, the bumper 11 in which the pair of clips 17 are arranged with high relative positional accuracy is obtained.

  Moreover, in the manufacturing method of the bumper 11 according to the first embodiment, the fixed portion molded body 15 provided with the clips 17 having at least different relative positions among the relative position, shape, or number of moldings according to the specifications is provided on the bumper body 13. A desired type of bumper 11 can be obtained by secondary resin molding. Thereby, only the bumper main body 13 becomes a kind of component management until the secondary molding process. And while supplying the same bumper main body 13, for each production lot to be flowed to the production line, a desired fixed portion molded body 15 is molded into a secondary resin on the bumper main body 13, and different types suitable for the production lot are used. The bumper 11 can be finished.

  Therefore, according to the bumper 11 and the bumper 11 manufacturing method according to the first embodiment, productivity can be improved, and a plurality of clips 17 to be attached to the vehicle body 37 can be formed with high accuracy.

(Second Embodiment)
As shown in FIG. 5, a bumper 11A that is a large-sized resin molded product for a vehicle according to the second embodiment of the present invention includes a bumper main body 13A that is a large-sized resin molded product main body and a plurality (two in the second embodiment). ) Of a fixed part 15A and a clip 17 which is a fixed part. In addition, about the structural member substantially the same as the bumper 11 of the said 1st Embodiment in the bumper 11A of this 2nd Embodiment, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  In the bumper 11A according to the second embodiment, two fixed portion molded bodies 15A are attached to the bumper main body 13A by secondary resin molding. That is, the bumper main body 13A is molded in large quantities with the same shape by primary molding using a normal large resin molding method. Two fixed portion molded body seat portions 19A and 19B are formed on the bumper body 13A. The fixed portion molded body seat portions 19A and 19B according to the second embodiment are formed by concave portions 21A and 21B formed at predetermined intervals in the longitudinal direction (vehicle width direction), respectively, inside the bumper body 13A. Engaging grooves 25 are formed in the left and right groove walls 23 of the recesses 21A and 21B. These recessed portions 21A and 21B are filled with a molding resin, whereby the fixed portion molded body 15A is molded into a secondary resin. The molten resin filled in the recesses 21A and 21B enters the engagement groove 25 and becomes the engagement flange portion 29 of the fixed portion molded body 15A. As a result, the fixed portion molded body 15A after the secondary resin molding is fixed to the bumper body 13 with high strength by the engagement flange 29 engaging the engagement groove 25.

  One clip 17 is formed on each of the two fixed portion molded bodies 15A integrally attached to the bumper body 13A by secondary resin molding. These clips 17 are integrally formed at the time of secondary resin molding by the fixing portion cavities 35 provided in the pair of upper dies 33a and 33b, respectively. These clips 17 formed at the time of secondary resin molding are arranged at predetermined relative positions according to a pair of mounting holes 39 which are a plurality of fixed portions of a vehicle body 37 (see FIG. 4) to which the bumper body 13A is mounted. Is done.

  That is, the pair of upper molds 33a and 33b are combined with the lower mold 57, so that the recesses 21A and 21B of the bumper body 13A and the fixed cavities 35 of the upper molds 33a and 33b are integrated with each other. 61B are formed, and the molten resin is injected into the molding spaces 61A and 61B, whereby the two fixed portion molded bodies 15A are integrated with the bumper body 13A.

  The upper molds 33a and 33b may be moved simultaneously when the mold is matched with the lower mold 57, or may be moved separately. Further, one upper mold 33a is configured to be movable at a predetermined interval in the longitudinal direction of the bumper body 13A. With this upper mold 33a, the fixed part molded body 15A is sequentially integrated with the fixed part molded body seats 19A and 19B of the bumper main body 13A. It can also be molded. At this time, the distance between the fixed cavities 35 of the upper molds 33a and 33b corresponding to the distance between the pair of clips 17 or the movement distance of the upper mold 33a movable in the longitudinal direction of the bumper body 13A The dimensions are managed according to the interval between the mounting holes 39.

Next, the operation of the bumper 11A having the above configuration will be described.
In the bumper 11A according to the second embodiment, the bumper main body 13A is primarily molded, and in this primary molding, molding accuracy when a normal bumper is molded is allowed. Therefore, it is not necessary to set many manufacturing control items for realizing high accuracy when the bumper body 13A is molded. That is, productivity can be improved. On the other hand, two fixed part molded bodies 15A are attached to the primary molded bumper body 13A by secondary resin molding. In this secondary resin molding, it is possible to mold each fixed portion molded body 15A in a small component size covering each of the pair of clips 17 having a predetermined relative positional relationship, and the molding accuracy due to shrinkage or sink of the molded resin material can be increased. Variations are reduced. Accordingly, the relative positional accuracy of the pair of clips 17 in the bumper 11A can be increased, and the clip 17 of the bumper 11A can be positioned with high accuracy with respect to the mounting hole 39 formed in the vehicle body 37 by sheet metal processing. Become.

In addition, the structure of the fixed part molded body seat part and the fixed part molded body according to the large-sized resin molded product for vehicles of the present invention is not limited to the above-described embodiment, and various forms can be taken. Nor.
For example, the fixed portion molded body seat portion 19C shown in FIG. 6A has a pair of engagement grooves 25A formed by a pair of hook-shaped projections 22A protruding from the inside of the bumper body 13A. The engaging grooves 25A are filled with molding resin, so that the fixed portion molded body 18A provided with the clip 17 is molded with the secondary resin. The molten resin filled in the engagement groove 25A becomes the engagement flange portion 29A of the fixed portion molded body 18A. Thereby, the fixed part molded body 18A after the secondary resin molding is fixed to the bumper main body 13A with high strength by the engagement flange part 29A engaging with the engagement groove 25A.

  6B has a plurality of engaging grooves 25B formed by a plurality of rectangular protrusion rows 22B protruding from the inside of the bumper body 13A. These engaging grooves 25B are filled with molding resin, so that the fixed portion molded body 18B including the clip 17 is molded with secondary resin. The molten resin filled in the engagement grooves 25B becomes a plurality of engagement leg portions 29B in the fixed portion molded body 18B. As a result, the fixed part molded body 18B after the secondary resin molding is fixed to the bumper body 13A with high strength by engaging the plurality of engaging legs 29B with the engaging grooves 25B.

  Furthermore, the fixed portion molded body seat portion 19E shown in FIG. 6 (c) has a plurality of dovetail grooves 25C formed by a plurality of dovetail projection rows 22C protruding from the inside of the bumper body 13A. These dovetail grooves 25 </ b> C are filled with a molding resin, whereby a fixed portion molding 18 </ b> C provided with the clip 17 is molded as a secondary resin. The molten resin filled in the dovetail groove 25C becomes a plurality of ant tenon-like leg portions 29C in the fixed portion molded body 18C. Thereby, the fixed part molded body 18C after the secondary resin molding is fixed to the bumper body 13A with high strength by engaging a plurality of dovetail-shaped leg portions 29C with the dovetail grooves 25C, respectively.

In addition, the large-sized resin molded article for vehicles of this invention and its manufacturing method are not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimensions, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.
For example, in the bumper 11 of the first embodiment, two clips 17 are formed on the fixed portion molded body 15, but it is needless to say that three or more clips 17 can be formed. In the bumper 11A of the second embodiment, the two fixed part molded bodies 15A are attached by secondary resin molding. Of course, three or more fixed part molded bodies 15A can be formed. Two or more clips 17 may be formed on the molded body 15A.

11 ... Bumper (large resin molded product for vehicles)
13, 13A ... Bumper body (large resin molded product body)
15, 15A ... Fixed part molded body 17 ... Clip (fixed part)
19, 19A, 19B ... fixed part molded body seat part 37 ... vehicle body 39 ... mounting hole (fixed part)

Claims (4)

A large resin molded body,
One fixed part molded body that is integrally attached to the main body of the large resin molded article by secondary resin molding;
A plurality of fixed portions that are integrally formed with the fixed portion molded body during the secondary resin molding and are arranged at predetermined relative positions according to a plurality of fixed portions of a vehicle body to which the main body of the large-sized resin molded product is attached; ,
A large-sized resin molded product for vehicles, comprising: A large resin molded body,
A plurality of fixed part molded bodies that are integrally attached to the main body of the large resin molded article by secondary resin molding;
At least one fixing that is integrally formed with the fixed part molded body during the secondary resin molding and that is arranged at a predetermined relative position according to a plurality of fixed parts of a vehicle body to which the main body of the large resin molded product is attached. And
A large-sized resin molded product for vehicles, comprising:   Fixation in which a plurality of fixed parts of a vehicle body to which a large resin molded product body having at least one fixed part molded body seat for attaching a fixed part molded body is attached are arranged at predetermined relative positions. The method for manufacturing a large-sized resin molded product for a vehicle, wherein the fixed part molded body having a portion is attached to the fixed part molded body seat by secondary resin molding.   The fixed part molded body having the fixed parts having different relative positions among the relative position, shape, or number of moldings is attached to the large-sized resin molded product body having the same shape by secondary resin molding. The manufacturing method of the large sized resin molded product for vehicles of Claim 3 to do.

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