JP2008183775A - Resin molded body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To restrain a sealing material from moving to the outside from the seal seating face. <P>SOLUTION: The concave sealing groove 25 is formed in the seal seating face 17 located in the periphery of the molded body 13, and the seal seating face 17 including the sealing groove 25 is coated in a predetermined thickness with the sealing material 29. While the expansion layer 35 having many voids is formed in the inside of the molded body 13 that includes at least part of the sealing groove corresponding part 31 that forms the bottom of the sealing groove 25, the solid layer 37 that has no void in the inside is formed in the molded body 13 located outside of the expansion layer 35. On the seal seating face 17 corresponding to the boundary part between the expansion layer 35 and the solid layer 37 the plate-like rib 27 is integrally formed so as to run along the sealing groove 25, which rib protrudes higher than the upper edge of the sealing groove 25 and in a protrusion height lower than the coating thickness of the sealing material 29 so that its tip may be covered by the sealing material 29. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a resin molded body in which a concave seal groove is formed on a seal seating surface located at the peripheral edge of a molded body main body.

Conventionally, for example, as shown in Patent Documents 1 and 2, as a resin molded body constituting a carrier plate attached to a door inner panel of a vehicle, a seal seat surface of a seal portion located at a peripheral edge of the molded body body is used. It has been known that a concave seal groove is formed and a gap between the mating member (door inner panel) is sealed by a seal material applied to the seal seat surface. And in this resin molding, the expansion layer which has many space | gap inside is formed by expanding a thermoplastic resin at the time of shaping | molding by injection molding. The expanded layer of the resin molded body is formed by filling a cavity of a molding die having a fixed die and a movable die with a thermoplastic resin, and retracting the movable die to enlarge the cavity volume.
JP 2006-181851 A JP 2006-181853 A

  By the way, in the resin molded body as shown in the above-mentioned Patent Documents 1 and 2, after applying a sol-like viscous seal material to the seal seat surface including the seal groove, the resin molded body is inclined when the seal material is dried. May be conveyed. When the resin molding is tilted in this way, the sealing material that has been applied to the resin molding and has not yet been dried moves from the seal seat surface, so that the seal material is finally applied accurately to the seal seat surface. As a result, there is a problem that the sealing performance is impaired.

  Therefore, an object of the present invention is to improve the structure of the resin molded body so that the sealing material is sealed even if the resin molded body is inclined after the sealing material is applied to the seal seating surface of the resin molded body. The object is to suppress the movement (outflow) from the seating surface to the outside.

  In order to solve the above object, in the resin molded body according to the present invention, an expansion layer is formed inside the molded body main body including at least a part of the seal groove corresponding portion, and the molded body main body outside the expansion layer is formed. A solid layer is formed, and a plate-like rib projecting at a projecting height higher than the upper edge of the seal groove is integrally formed on the seal seat surface corresponding to the boundary between the expanded layer and the solid layer. .

  Specifically, in the resin molded body according to the first invention, a concave seal groove is formed on the seal seat surface located at the peripheral edge of the molded body, and a seal material is provided on the seal seat surface including the seal groove. A resin molded body to be applied with a coating thickness of at least a portion corresponding to a seal groove corresponding to the bottom of the seal groove, and the inside of the molded body is injection-filled into a cavity of the mold By expanding the cavity volume in the process of solidifying the thermoplastic resin, an expanded layer having a large number of voids is formed inside. On the molded body body outside the expanded layer, the cavity volume is expanded. In other words, a solid layer without voids is formed inside, and the seal seat surface corresponding to the boundary portion between the expansion layer and the solid layer is covered with the seal material so that the tip is covered with the seal material. Higher than the upper edge of the groove, and a plate-like rib projecting at the coating thickness of less protruding height than the sealing member is formed integrally along with the seal groove.

  The resin molded body according to a second aspect of the present invention is the resin molded body according to the first aspect of the present invention, wherein the plate-like rib is formed on the outer peripheral side edge of the seal groove.

  A resin molded body according to a third aspect of the present invention is the resin molded body according to the first aspect of the present invention, wherein the plate-like rib is formed at the bottom of the seal groove.

  A resin molded body according to a fourth invention is the resin molded body according to any one of the first to third inventions, wherein the door inner panel in a vehicle door having a door outer panel and a door inner panel is provided. It is a carrier plate to which the seal seating surface is attached in opposition.

  According to the first aspect of the present invention, the plate-like rib protruding at a protruding height higher than the upper edge of the seal groove is integrally formed along the seal groove on the seal seat surface located at the peripheral edge of the molded body. Is formed. For this reason, when a resin molded body in which a viscous sealant is applied to the seal seat surface is conveyed, the sealant adheres to the plate-like ribs, that is, the plate-like ribs play a role of a dam. Accordingly, the movement (outflow) of the seal material from the seal seat surface to the outside of the molded body can be suppressed, and thus the seal material can be applied to the seal seat surface accurately (with high accuracy).

  Further, since the plate-like rib is formed so as to protrude with a protrusion height smaller than the coating thickness of the sealing material, the plate-like rib contacts the counterpart member when the resin molded body is attached to the counterpart member. It is possible to prevent the sealing performance from deteriorating due to a gap between the molded body main body and the mating member, or the plate-like ribs being broken.

  Further, even when an external force is applied to the sealing material when the resin molding is transported after the sealing material is applied and dried, the sealing material is also adhered to the plate-like rib. Is prevented from peeling off from the seal seat surface.

  The plate-like rib is formed on the seal seat surface corresponding to the boundary between the expansion layer formed by increasing the cavity volume of the mold and the solid layer formed without increasing the cavity volume. Yes. While this solid layer is formed of a fixed mold and a movable mold, the expansion layer is formed by expanding the cavity volume by sliding the slide mold within the movable mold. Therefore, since the plate-like rib is formed using the boundary portion between these movable mold and slide mold, the plate-like rib can be easily formed integrally with the seal seat surface.

  Furthermore, since an expansion layer is formed inside the molded body main body including at least a part of the seal groove corresponding portion, the resin molded body is compared with the case where the entire seal portion is formed of a solid layer. Weight reduction can be achieved.

  According to the second aspect of the invention, since the plate-like rib is formed on the outer peripheral side edge of the seal groove, more seal material is blocked by the plate-like rib, and the movement (outflow) of the seal material is further prevented. It can be effectively suppressed.

  According to the third aspect, since the plate-like rib is formed at the bottom of the seal groove, the seal material adheres to both surfaces of the plate-like rib, and the contact (attachment) area of the seal material to the seal seat surface is large. Since it becomes large, the movement of a sealing material can be suppressed more effectively.

  According to the fourth aspect of the invention, since the movement of the sealing material from the seal seat surface of the carrier plate can be suppressed and the seal material can be accurately applied to the seal seat surface, the carrier plate can be applied to the door inner panel. When attached, the sealing material is accurately positioned between the carrier plate and the door inner panel, so that the sealing performance can be reliably maintained.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Embodiment 1 of the Invention
(Side door)
In FIG. 1, reference numeral 1 denotes, for example, a front side door of an automobile. The front side door 1 includes a door body 7 having a metal door outer panel 3 and a door inner panel 5. The door inner panel 5 is provided with a resin carrier plate 9 as a resin molded body according to the embodiment of the present invention and a door trim 11 that covers the carrier plate 9 from the vehicle interior side.

(Carrier plate)
FIG. 2 is a view of the carrier plate 9 as seen from the outside of the passenger compartment. The carrier plate 9 is formed of a fiber-containing thermoplastic resin and includes a molded body main body 13 that is a main body of the carrier plate 9, and a plurality of mounting portions with the door inner panel 5 are provided on the periphery of the molded body main body 13. A circular convex mounting portion 19 is formed, and a bolt insertion hole 19 a is formed through the central portion of the mounting portion 19. Then, the bolt insertion hole 19a is aligned with a mounting hole 5a (shown in FIG. 1) formed in the door inner panel 5, and a weld welded in advance to the outside of the door inner panel 5 through the bolt 21 is inserted. The carrier plate 9 is attached to the door inner panel 5 by being screwed into the nut 23.

  As shown in FIG. 3, a seal part 15 having a substantially trapezoidal cross section protruding from the molded body main body 13 toward the vehicle interior side is provided on the outer periphery of the molded body main body 13 on the entire circumference of the molded body main body 13. It is continuously formed. The exterior surface of the seal portion 15 (the surface on the door inner panel 5 side) is configured as a seal seat surface 17. The seal seat 25 has a seal groove 25 that is recessed toward the interior of the vehicle interior. 13 are continuously formed over the entire circumference. The outer peripheral surface on the outer side of the seal groove 25 of the molded body 13 and the inner peripheral surface on the inner side are formed substantially flush with each other. The mounting portion 19 is formed on the inner peripheral side of the seal seat surface 17.

  The molded body 13 and the door inner panel 5 are sealed by a seal material 29 applied to the seal seat surface 17 including the seal groove 25. That is, the carrier plate 9 is attached to the door inner panel 5 with the seal seat surface 17 facing the door plate. The sealing material 29 has elasticity, and is applied so as to have a substantially uniform coating thickness (for example, 4 to 5 mm) over the entire circumference of the molded body 13 of the seal seat surface 17. Here, the sealing material 29 has high viscosity immediately after being applied to the seal seating surface 17, but becomes elastic when dried by a drying device after application.

  A plate-like rib 27 protruding from the outer peripheral edge of the seal groove 25 toward the vehicle compartment outer side (door inner panel 5 side) extends along the seal groove 25 on the seal seat surface 17 of the seal portion 15. Are integrally formed. The plate-like ribs 27 are formed continuously over the entire circumference of the molded body 13 on the seal seat surface 17. In addition, in FIG.1 and FIG.2, illustration of this plate-shaped rib 27 is abbreviate | omitted.

  3B, the plate-like rib 27 is higher than the outer edge upper end (seal seating surface 17) of the seal groove 25, and the application of the sealing material 29 applied to the seal seating surface 17 is performed. It is formed so as to protrude at a protrusion height h (height from the seal seat surface 17) smaller than the thickness. Further, the protruding height of the plate-like rib 27 is formed to be smaller than the protruding height of the mounting portion 19 of the carrier plate 9. That is, the sealing material 29 is applied, for example, in a semicircular cross section having a high center and low both sides. The plate-like rib 27 is located at a position lower than the highest center of the sealing material 29, but the height h of the plate-like rib 27 is lower than the height of the sealing material 29 from the seal seating surface 17, and the plate-like rib 27 is It is buried in the sealing material 29.

  Here, the molded body 13 has a hard skin layer 33 with no voids and a high resin density, and is formed inside the skin layer 33, and has a number of voids (not shown). It is composed of an expanded layer 35 having a resin density lower than that of 33 (shown in FIG. 1 by a thick line for convenience of drawing). On the other hand, each of the attachment portions 19 is composed of only a solid layer 37 having no resin layer and having a high resin density.

  In the seal portion 15, a skin layer 33 having a high resin density is formed on the inner surface of the molded body main body 13 including the seal groove corresponding portion 31 that forms the bottom of the seal groove 25. An expansion layer 35 having a low resin density is formed inside 33. On the other hand, the seal portion 15 outside the expanded layer 35 (outside the molded body main body 13 than the seal groove corresponding portion 31) is formed of a solid layer 37 having a high resin density.

  The plate-like rib 27 of the seal portion 15 is formed on the seal seat surface 17 corresponding to the boundary portion between the expansion layer 35 and the solid layer 37.

(Molding method)
Next, the method for forming the carrier plate 9 will be described with a focus on the location where the seal portion 15 is formed.

  As shown in FIG. 4, a forming die 47 having a fixed die 43 having a recess 41 for forming the seal portion 15 and a movable die 45 arranged to face the fixed die 43 so as to advance and retreat is prepared. To do. The fixed mold side molding surface 43a of the fixed mold 43 is formed in a shape corresponding to the inside surface of the carrier plate 9 so as to mold the vehicle interior side, and the movable mold side molding surface 45a of the movable mold 45 is formed on the vehicle side of the carrier plate 9. It forms in the shape corresponding to it so that the seal seat surface 17 of an outdoor side surface may be shape | molded. In the movable mold 45, a slide mold 51 that can be inserted into the concave portion 41 and has a convex portion 49 for forming the seal groove 25 is inserted and arranged so as to be able to advance and retract. A slight gap S (for example, 0.2 to 0.7 mm) is formed between the movable mold 45 and the slide mold 51 (on the side of the convex portion 49 of the slide mold 51) in order to form the plate-like rib 27. It is vacant. Here, 51 a is a molding surface of the slide mold 51 that forms the outer side surface of the molded body main body 13 (carrier plate 9) including the seal seat surface 17 inside the molded body main body 13 of the seal groove 25.

  As shown in FIG. 4A, the mold 47 is closed with the slide mold 51 advanced. Next, the cavity 53 is injected and filled with a fiber-containing thermoplastic resin R (hereinafter simply referred to as a resin R) such as a glass fiber-containing polypropylene resin from an injection machine (not shown).

  Thereafter, the resin R solidifies in the cavity 53 of the mold 47, that is, the resin R in the vicinity of the molding surface of the mold 47 in the cavity 53 is cooled early due to the influence of the mold temperature, and the skin layer 33 is formed. In addition, when the inside is in a gel state with high viscosity, the slide mold 51 is moved backward by a slide amount of a predetermined distance in the direction A in which the cavity volume is enlarged. That is, the slide mold 51 is slightly separated from the fixed mold 43, and the cavity volume corresponding to the seal groove corresponding portion 31 and the molded body 13 is increased by, for example, twice or more. As described above, when the cavity volume is increased, the fibers in the gel-state resin R that have been compressed by the molding die 47 are released from the compression and elastically restored, as shown in FIG. Thus, the resin R expands by this elastic restoring force (spring back phenomenon). Here, when the slide mold 51 is moved in the cavity volume expansion direction A, the slide mold 51 has a molding surface 51 a that is substantially the same height as the movable mold-side molding surface 45 a of the movable mold 45. 51 slide amount is set.

  On the other hand, when the cavity 53 is filled with the resin R, the resin R enters the gap S between the movable mold 45 and the slide mold 51 and is cooled by the influence of the mold temperature, so that a constant intrusion amount is obtained. Then, the intrusion stops and the plate-like rib 27 composed of a solid layer without a gap is formed before the above-described retreating process of the slide mold 51.

  In this way, on the inner peripheral side (inside the molded body 13) including the molded body main body 13 and the seal groove corresponding portion 31 in the seal portion 15, the expansion layer 35 having a large number of voids therein is formed. At the same time, a skin layer 33 having a high resin density is formed on the surface.

  On the other hand, on the outer peripheral side of the attachment portion 19 and the seal portion 15 relative to the seal groove corresponding portion 31, the movable die 45 does not retreat in the direction A in FIG. 3 when the slide die 51 retreats, and the cavity volume of the portion does not increase. The fiber F in the resin R is solidified in a state where the elastic restoring force of the fiber F is suppressed, and the solid layer 37 having a high resin density is formed. Note that the molded body main body 13 excluding the outside of the attachment portion 19 and the seal groove corresponding portion 31 in the seal portion 15 has a skin layer 33 and an expansion layer 35 and is molded.

(Effect of Embodiment 1)
A seal material 29 is applied to the seal seat surface 17 of the carrier plate 9 formed as described above. The sealing material 29 has a predetermined application thickness (application thickness thicker than the protruding height of the plate-like rib 27 so as to cover the plate-like rib 27) in a portion including the seal groove 25 of the seal seat surface 17. Applied. The carrier plate 9 coated with the sealing material 29 is conveyed to a drying device (not shown) to dry the sealing material 29.

  Even when the carrier plate 9 (molded body 13) is inclined during the conveyance, in the carrier plate 9 of the first embodiment, the seal groove is formed on the outer peripheral side edge of the seal groove 25 of the seal seat surface 17. 25. Since the plate-like ribs protruding at a higher protrusion height than the upper edge of 25 are integrally formed along the seal groove 25, the viscous sealing material 29 is formed on the seal seat surface 17 and the plate-like ribs 27. The plate-like ribs 27 adhere and play a role of function, and the seal material 29 can be prevented from moving (outflowing) from the region of the seal seat surface 17 to the outside. As a result, even when the carrier plate 9 is attached to the door inner panel 5, the sealing material 29 is not insufficiently applied in the region of the seal seat surface 17, and the sealing performance can be reliably maintained.

  Further, even when an external force is applied to the sealing material 29 when the carrier plate 9 is transported after the sealing material 29 is applied and dried, the sealing material 29 also adheres to and adheres to the plate-like ribs 27. Since the area is increased, the sealing material 29 is prevented from peeling from the seal seat surface 17.

  Further, since the plate-like rib 27 is formed so as to protrude with a protruding height smaller than the coating thickness of the sealing material 29 and smaller than the protruding height of the mounting portion 19 of the carrier plate 9, the carrier plate 9 is fixed to the door. When it is attached to the inner panel 5, the plate-like rib 27 comes into contact with the door inner panel, and there is a gap between the molded body 13 and the door inner panel 5, or the plate-like rib 27 is broken. It is possible to prevent the sealing performance from deteriorating.

  The plate-like rib 27 is a seal seat surface corresponding to a boundary portion between the expansion layer 35 formed by increasing the cavity volume of the mold 47 and the solid layer 37 formed without increasing the cavity volume. 17 is formed. The solid layer 37 is formed by the fixed mold 43 and the movable mold 45, while the expansion layer 35 is formed by expanding the cavity volume by sliding the slide mold 51 in the movable mold 45. Therefore, since the plate-shaped rib 27 is formed using the boundary portion between the movable mold 45 and the slide mold 51, the plate-shaped rib 27 can be easily formed integrally with the seal seat surface 17.

  Further, since the expansion layer 35 is formed inside the molded body 13 including at least a part of the seal groove corresponding portion 30, compared with the case where the entire seal portion 15 is formed of the solid layer 37. The weight of the carrier plate 9 can be reduced.

  Further, since the outer peripheral side of the seal portion 15 with respect to the seal groove corresponding portion 31 is composed of the solid layer 37, the rigidity of the outer peripheral portion of the carrier plate 9 that contacts the door inner panel 5 is high, so that the carrier plate 9 is connected to the door inner. It can be firmly attached to the panel 5.

<< Embodiment 2 of the Invention >>
Next, the carrier plate 9 according to Embodiment 2 of the present invention will be described in detail with reference to FIGS. The same components as those in FIGS. 3 and 4 are denoted by the same reference numerals, and detailed description of the same portions as those in the first embodiment is omitted.

  That is, the carrier plate 9 according to the second embodiment of the present invention is different from the first embodiment in that the plate-like rib 27 is formed in the seal groove corresponding portion 31 constituting the bottom of the seal groove 25 of the seal seat surface 17. Different.

  Specifically, as shown in FIG. 5, the plate-like rib 27 extends over the entire circumference of the molded body 13 at an intermediate portion between the outer peripheral side edge and the inner peripheral side edge at the bottom of the seal groove 25. It is formed continuously. The plate-like ribs 27 are formed so as to protrude at the same protrusion height h as in the first embodiment. That is, the plate-like rib 27 has a protruding height h that is higher than the seal seat surface 17 on the upper edge side of the seal groove 25 and smaller than the coating thickness of the seal material 29.

  Further, the seal portion 15 is provided with a skin layer 33 having a higher resin density on the surface thereof on the inner side of the molded body 13 than the seal groove corresponding portion 31 corresponding to the plate-like rib 27, and the inside of the skin layer 33. An expansion layer 35 having a low resin density is formed. The expansion layer 35 is formed to the seal groove corresponding portion 31 slightly outside the plate-like rib 27. On the other hand, the seal portion 15 outside the expansion layer 35 (outside the plate-like rib 27) is composed of only the solid layer 37 having a high resin density. In addition, the height h of the plate-like rib 27 in the second embodiment is applied when the center in the width direction of the sealing material 29 is applied higher than both sides as in the sealing material 29 of the first embodiment. You may set slightly higher than the height h of the sealing material 29 of Embodiment 1. FIG.

  And as shown to Fig.6 (a), the movable mold | type 45 of the shaping | molding die 47 for shape | molding the carrier plate 9 which concerns on this Embodiment 2 can be inserted in the recessed part 41 of the said fixed die 43, A movable-side convex portion 55 for forming the outer peripheral side of the seal groove 25 with respect to the plate-like rib 27 is formed. On the other hand, the slide mold 51 is formed with a convex portion 49 that can be inserted into the concave portion 41 and for molding the inner peripheral side of the plate-like rib 27 of the seal groove 25. A slight gap S is formed between the movable mold side convex portion 55 of the movable mold 45 and the convex portion 49 of the slide mold 51 in order to form the plate-like rib 27. 49 and the movable-type convex part 55 are inserted into the concave part 41 with the gap S therebetween.

  Then, as shown in FIG. 6B, in the process in which the resin R is solidified in the cavity 53 of the molding die 47, the slide die 51 is moved backward in the direction A in which the cavity volume increases, The cavity volume corresponding to the inner peripheral side and the molded body main body 13 is enlarged. Here, when the slide mold 51 is moved in the direction A, the slide amount of the slide mold 51 is set so that the convex portion 49 of the slide mold 51 and the movable mold-side convex portion 55 have substantially the same height. . As a result, the skin layer 33 is formed on the inner circumferential side of the plate-like rib 27 of the seal groove corresponding portion 31 and the molded body 13, and the expansion layer 35 is formed therein. At this time, a part of the resin R in the gel state having a high viscosity on the movable mold 45 side is also released from the compression and elastically restored and expanded, so that it is larger than the plate-like rib 27 of the seal groove corresponding portion 31. An expansion layer 35 is also formed on a part of the inside slightly on the outer peripheral side. A solid 37 is formed on the outer peripheral side of the expansion layer 35 of the seal portion 15.

  On the other hand, when the resin 53 is filled in the cavity 53, the resin R enters the gap S between the movable mold 45 and the slide mold 51, and the plate-shaped rib formed of a solid layer before the slide mold 51 is retracted. 27 is formed.

  Therefore, in the carrier plate 9 of the second embodiment, since the plate-like rib 27 is provided at the bottom of the seal groove 25, the sealing material 29 is provided on both the outer peripheral side and the inner peripheral side of the molded body 13 in the plate-like rib 27. And the contact (attachment) area of the sealing material 29 to the molded body main body 13 is large, so that the movement of the sealing material 29 from the seal seat surface 17 can be more effectively suppressed.

(Other embodiments)
In addition, the above-mentioned embodiment is an illustration of this invention, Comprising: This invention is not limited to this example. For example, the following configuration may be used.

  That is, in Embodiment 1 described above, the gap S is provided between the movable mold 45 and the slide mold 51, and the plate ribs 27 are formed by allowing the resin R to enter the gap. This is not a limitation.

  For example, as shown in FIG. 7, no gap is provided between the movable mold 45 and the slide mold 51 over the entire advancing and retreating direction of the slide mold 51. Instead, the movable mold 45 is movable at the side edge of the slide mold 51. A mold-side recess 57 may be provided, and the plate-shaped rib 27 may be formed by the movable mold-side recess 57 and the slide mold 51. Thereby, the protruding height of the plate-like rib 27 can be set with higher accuracy.

  In the above embodiment, the plate-shaped rib 27 is integrally formed over the entire circumference of the molded body main body 13 of the seal seat surface 17. However, the plate-shaped rib 27 is not necessarily continuous with the entire circumference of the molded body main body 13. The sealing material 29 may be provided intermittently so that the sealing material 29 does not move outward from the seal seat surface 17.

  Moreover, in the said embodiment, although the space | gap was formed in the inside of the carrier plate 9 using the spring back phenomenon of the fiber in resin R, you may contain a foaming agent in resin R. FIG. Then, even if the restoring force of the fiber in the spring back phenomenon is insufficient, the foaming force of the foaming agent complements the restoring force of the fiber, so that the expansion layer 35 having voids can be reliably formed. Moreover, you may use the thermoplastic resin which mixed only the foaming agent, without mixing a fiber. In these cases, examples of the foaming agent include a chemical foaming agent that generates gas by a chemical reaction, and a physical foaming agent that uses an inert gas such as carbon dioxide gas and nitrogen gas.

  Moreover, in the said embodiment, although the example in case the resin molding is the carrier plate 9 attached to the door inner panel 5 of the side door 1 of a motor vehicle was shown, the door inner panel etc. of a back door may be sufficient. Furthermore, it can be applied to a panel to which a sealing material other than an automobile is applied.

  As described above, the present invention is useful for a resin molded body in which a concave seal groove is formed on the seal seat surface located at the peripheral edge of the molded body.

It is sectional drawing which shows the lower part of the side door of the motor vehicle provided with the carrier plate which concerns on Embodiment 1 of this invention. It is a top view of the carrier plate in FIG. It is the III-III line expanded sectional view of FIG. 2, (a) shows the state before apply | coating a sealing material, (b) shows the state which apply | coated the sealing material to the seal seat surface. It is sectional drawing of the shaping | molding die which shape | molds the part corresponded in FIG.3 (b) of a carrier plate, (a) shows the state with which resin was filled in the cavity, (b) is a cavity by which a slide type | mold slides. The state where the volume is expanded is shown. It is FIG.3 (b) equivalent view of the carrier plate which concerns on Embodiment 2 of this invention. FIG. 5 is a view corresponding to FIG. 4 of a mold for forming a carrier plate according to Embodiment 2 of the present invention. FIG. 4A is a view corresponding to FIG. 4A of a carrier plate mold according to another embodiment.

Explanation of symbols

1 Side Door 3 Door Outer Panel 5 Door Inner Panel 9 Carrier Plate (Resin Molded Body)
13 Molded body 17 Seal seat surface 25 Seal groove 27 Plate-shaped rib 29 Seal material 31 Seal groove corresponding portion 35 Expansion layer 37 Solid layer 47 Mold 53 Cavity h Projection height R Thermoplastic resin

Claims (4)

A resin molded body in which a concave seal groove is formed on the seal seat surface located at the peripheral edge of the molded body, and a seal material is applied to the seal seat surface including the seal groove with a predetermined coating thickness,
The cavity volume is expanded in the process of solidifying the thermoplastic resin injected and filled in the cavity of the mold inside the molded body including at least a part of the seal groove corresponding portion constituting the bottom of the seal groove. In this way, an expanded layer having a large number of voids is formed inside, and the solid body without voids is formed inside the molded body outside the expanded layer by not expanding the cavity volume. ,
The seal seat surface corresponding to the boundary portion between the expansion layer and the solid layer is higher than the upper edge of the seal groove so that the tip portion is covered with the seal material, and more than the application thickness of the seal material. A resin molded body, wherein plate-like ribs protruding at a small protruding height are integrally formed along the seal groove. In the resin molding of Claim 1,
The said plate-shaped rib is formed in the outer peripheral side edge part of the said seal groove, The resin molding characterized by the above-mentioned. In the resin molding of Claim 1,
The plate-shaped rib is formed at the bottom of the seal groove, and is a resin molded body. In any one resin molded body of Claim 1 to 3,
A resin molded body comprising a carrier plate, wherein the seal seat face is attached to the door inner panel of a vehicle door including a door outer panel and a door inner panel.

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