JP2019107863A - Composite resin molding - Google Patents

Abstract

To provide a composite resin molding capable of obtaining good appearance quality while suppressing rigidity reduction of a side piece of a primary molding.SOLUTION: The composite resin molding comprises a tabular primary molding 21 comprising a first resin material R1 integrated together with a tabular secondary molding 22 comprising a second resin material R2. The primary molding 21 and the secondary molding 22 respectively constitute a product design surface. The primary molding 21 contains a side piece neighboring with a body part 22a of the secondary molding 22. The side piece contains, at one side in the sheet thickness direction, a communication groove 23 communicating one side part neighboring with the body part 22a of the secondary molding 22 with the other side part on the opposite side of the one side part. The secondary molding 22 contains a body part 22a and a crossing part 22b filled in the communication groove 23, having one end connected with the body part 22a and the other end facing outside of the side part of the side piece.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a composite resin molded article obtained by integrating a plurality of molded articles formed of resin materials having different properties.

Composite resin molded articles in which a plurality of molded articles made of resin materials having different characteristics are integrated are widely used for automobile parts, electric parts, various design parts, and the like.
As a method of manufacturing such a composite resin molded product, a method of manufacturing a target composite resin molded product by two-color molding (two-color injection molding) using injection molding is known (for example, Patent Document 1) reference).

In the composite resin molded product described in Patent Document 1, the primary molded body is constituted by a light-impermeable colored frame, and the secondary molded body covers the entire opening of the frame while the opening of the frame is It is constituted by a colorless and transparent cover integrally joined to the peripheral portion.
In the production of the composite resin molded product, after a colored frame is formed by the primary mold, a colorless and transparent cover is formed by the secondary mold so as to cover the upper surface side of the frame. The injection gate of the secondary mold that forms the cover is set on the surface of the cover that is not the product design surface. As a result, gate marks do not appear on the product design surface of the molded cover. Moreover, the injection gate of the primary mold which forms a frame is set to the surface covered by a covering later. For this reason, even if a gate mark remains on the outer surface of the frame, the gate mark is covered with the cover and hardly visible.

JP, 2009-006533, A

  The composite resin molded product described in Patent Document 1 has a laminated structure in which the surface of a primary molded body (frame) is covered with a secondary molded body (cover). For this reason, it can be avoided that gate marks at the time of molding appear on the product design surface. However, in the case of a composite resin molded product in which both the primary molded product and the secondary molded product constitute the product design surface, other defects may be caused when arranging the remaining part of the gate mark in a position inconspicuous from the outside. is there.

  For example, in the case of a composite resin molded article in which secondary molded bodies are arranged in parallel in the inner region surrounded by the primary molded body, when trying to set the injection gate forming the secondary molded body at a position away from the design surface In the side piece of the primary molded body, a slit is formed so as to divide a part of the side piece, and when molding the secondary molded body, it is necessary to introduce the resin to the main body of the secondary molded body through the slit. Absent. In this case, since the injection gate of the secondary mold can be set at the end of the slit of the primary molded product, no gate mark appears on the product design surface of the completed composite resin molded product.

  However, when a slit is formed in the side piece of the primary molded body and the resin material is introduced into the region corresponding to the main body of the secondary molded body through the slit, the rigidity of the side piece of the primary molded body is extremely reduced. , Promote the deformation of the primary molded body. In addition, when the secondary molded body is injection-molded, the possibility that the divided portions of the side pieces shift due to the flow pressure of the resin is increased, and homogeneous product production is inhibited.

  Then, this invention tends to provide the composite resin molded product which can obtain a favorable external appearance quality, suppressing the rigid fall of the side piece of a primary molded object.

The composite resin molded article according to the present invention adopts the following configuration in order to solve the above problems.
That is, the composite resin molded product according to the present invention is a plate-shaped secondary formed of a plate-shaped primary formed body (for example, the primary formed body 21 of the embodiment) made of the first resin material and a second resin material. In a composite resin molded product, in which a molded product (for example, the secondary molded product 22 of the embodiment) is integrated, and the primary molded product and the secondary molded product both constitute a product design surface, the primary molded product The body has a side piece (e.g., the upper extending wall 11f-2 of the embodiment) adjacent to the main body portion (e.g., the main body portion 22a of the embodiment) of the secondary molded body, and the side piece A communication groove (for example, the communication groove 23 of the embodiment) communicating one side adjacent to the main body of the secondary molded body and the other side opposite to the one side to one side in the plate thickness direction The secondary molded body is filled in the main body portion and the communication groove, and one end thereof is connected to the main body portion Both transverse portion to which the other end faces the outside of the other side of the side pieces (e.g., transverse portion 22b of the embodiment) and, characterized in that it has a.

  According to the above configuration, it is possible to set the injection gate for molding the secondary molded body at the outer end of the communication groove of the primary molded body. In this case, after the composite resin molded product is molded, the gate marks of the secondary molded body appear at the outer end of the cross section, so that the gate marks are less visible from the outside. Moreover, in the case of said structure, a communication groove is provided in the one side of the thickness direction at the side piece of a primary molded object, and a part of side piece is not divided. For this reason, the rigid fall of the side piece of a primary molded object can be suppressed.

The primary molded body may have a flange portion (for example, the flange portion 24 of the embodiment) along the boundary portion in the vicinity of the boundary portion with the main body portion of the secondary molding.
In this case, the rigidity in the vicinity of the boundary between the primary molded body and the main body of the secondary molded body can be enhanced by the flange portion. Also, when the second resin material for forming the secondary molded body is injected into the mold after molding the primary molded body, the flange portion of the primary molded body is stably held by the mold Therefore, it is possible to suppress the displacement of the primary molded body due to the injection pressure of the resin.

The flange portion may be connected to side walls facing each other of the communication groove so as to straddle the communication groove.
In this case, the communication groove of the primary molded body, which is a flow path of the second resin material when molding the secondary molded body, is reinforced by the flange portion. For this reason, it can suppress that the communicating groove part of a primary molded object deform | transforms at the time of shaping | molding of a secondary molded object. Therefore, when this configuration is adopted, the product quality of the composite resin molded product can be stabilized.

In the communication groove, in a region crossing the groove spanning portion of the flange portion (for example, the groove spanning portion 24a of the embodiment), a through portion (for example, the embodiment) communicating with the other side in the thickness direction of the side piece The through portion 50) may be formed.
In this case, since the undercut portion is not formed in the region crossing the groove spanning portion of the flange portion, it is possible to form the primary molded body without using the slide die. Therefore, when this configuration is adopted, the molding die can be simplified.

The second resin material may be made of a resin material softer than the first resin material.
In this case, after the primary molded body is formed of the hard first resin material, the soft second resin material is stabilized in the molded portion of the main body portion of the secondary molded body through the communication groove of the side piece of the primary molded body. Can be filled. Therefore, when this configuration is adopted, the product quality of the composite resin molded product can be stabilized.

The plate-like main body of the secondary molded body may extend along the load input direction from the outside.
In this case, when a load is input from the outside to the plate-like main body of the secondary molded body, the soft secondary molded body is easily bent and deformed, and the input impact can be alleviated.

  According to the present invention, it is possible to set the injection gate for molding the secondary molded body at the outer end of the communication groove of the primary molded body without dividing a part of the side piece of the primary molded body. As a result, it is possible to obtain a good appearance quality while suppressing a decrease in the rigidity of the side pieces of the primary molded body.

It is a perspective view of a cowl top garnish of one embodiment of the present invention. It is a perspective view of the 1st garnish of one embodiment of the present invention. It is a sectional view corresponding to a III-III section of Drawing 1 of a cowl top garnish of one embodiment of the present invention. It is sectional drawing which follows the IV-IV line of FIG. 2 of the 1st garnish of one Embodiment of this invention. It is a typical bottom view of a forming die which manufactures the 1st garnish of one embodiment of the present invention. It is sectional drawing in alignment with the VI-VI line of FIG. 5 of the molding die of one Embodiment of this invention. It is sectional drawing which follows the VII-VII line of FIG. 5 of the molding die of one Embodiment of this invention. It is sectional drawing in alignment with the VIII-VIII line of FIG. 5 of the molding die of one Embodiment of this invention. It is a sectional view corresponding to Drawing 7 of basic embodiment of a forming metallic mold of other embodiments of the present invention. It is a sectional view corresponding to Drawing 8 of basic embodiment of a forming metallic mold of other embodiments of the present invention.

Hereinafter, an embodiment of the present invention will be described based on the drawings.
FIG. 1 is a view of the cowl top garnish 10 according to the embodiment as viewed from the front left upper side of the vehicle, and FIG. 2 is a view of the first garnish 11 which is a component of the cowl top garnish 10 from the front upper side of the vehicle FIG. 3 is a view showing a cross section corresponding to the III-III cross section of FIG. 1, and FIG. 4 is a view showing a cross section taken along line IV-IV of FIG. It should be noted that an arrow FR pointing to the front of the vehicle, an arrow UP pointing to the upper side of the vehicle, and an arrow LH pointing to the left of the vehicle are described at appropriate positions in the drawing.
As shown in FIG. 3, a cowl portion 2 extending along the vehicle width direction is installed above the rear of the engine room 1 of the vehicle. In the cowl portion 2, a metal cowl top panel 4 disposed below the front edge of the front windshield glass 3 and a metal body panel 5 disposed below the front of the cowl top panel 4 are joined together. It is formed. The cowl portion 2 is formed in a bowl shape opened upward by the cowl top panel 4 and the body panel 5 being connected to each other.

The cowl unit 2 is connected to an air intake unit (not shown) of an air conditioner (not shown) for introducing outside air into the vehicle compartment, and a driving motor and the like for a wiper device (not shown).
In addition, a rear edge flange 4r inclined rearward and upward is extended at the rear edge portion of the cowl top panel 4, and a separate metallic panel material 8 is connected to the upper portion of the rear edge flange 4r. The front edge portion of the front windshield glass 3 is fixed to the upper surface of the panel member 8 by a liquid-tight adhesive rubber adhesive.

  Further, above the engine room 1, a hood hood 6 which covers the upper side of the engine room 1 so as to be capable of opening and closing is disposed. The hood hood 6 has a hood outer portion 6a facing upward when the engine room 1 is closed, and a hood inner portion 6b forming a substantially closed cross section between the lower surface of the hood outer portion 6a.

  A cowl top garnish 10 mainly made of resin is attached to an upper portion of the cowl portion 2 so as to close a space between the rear edge of the hood hood 6 and the lower edge of the front windshield glass 3. The cowl top garnish 10 is formed in a long, substantially plate shape along the cowl portion 2 with the vehicle width direction as a longitudinal direction. The cowl top garnish 10 improves the appearance of the area between the hood hood 6 and the front end of the front windshield glass 3 with the hood hood 6 closed.

  As shown in FIG. 3, the central region of the cowl top garnish 10 in the vehicle width direction is formed in a substantially hat-shaped cross-sectional shape in which the cross-section in the vehicle longitudinal direction is convex upward. Specifically, the central region of the cowl top garnish 10 has a convex cross-sectional portion 14a protruding upward, a front flange 14f extended to the front of the convex cross-sectional portion 14a, and a rear portion of the convex cross-sectional portion 14a. And a rear flange 14r extended to the A seal support flange 16 protrudes upward at the front end of the convex cross-sectional portion 14a. The seal support flange 16 is attached with a seal member 17 having a hollow cross section that seals between the bottom surface of the hood hood 6 and the bottom surface when the hood hood 6 is closed.

The front flange 14f of the cowl top garnish 10 is superimposed on the upper surface of the front flange 19f provided on the front edge of the body panel 5, and the body panel is formed by a hook (not shown) integrally formed on the front flange 14f of the cowl top garnish 10. The front flange 19f is detachably engaged with the front flange 19f. Between the front flange 14f of the cowl top garnish 10 and the front flange 19f of the body panel 5, a seal member 20 for blocking hot air and odor from the engine room 1 is interposed.
Further, the rear flange 14r of the cowl top garnish 10 is superimposed on the upper surface of the front edge portion of the front windshield glass 3 and locked and fixed to the panel material 8 through a locking clip (not shown) in that state.

Here, a central region in the vehicle width direction of the cowl top garnish 10 is configured of a first garnish 11 on the vehicle front side and a second garnish 12 on the vehicle rear side with the seal support flange 16 as a boundary. The first garnish 11 is made of a plate-shaped primary molded body 21 made of a first resin material R1 and a second resin material R2 (a rubbery resin material having elasticity) softer than the first resin material R1. The secondary molded body 22 is integrally formed by two-color molding. The first garnish 11 and the second garnish 12 respectively have flange halves 11f and 12f, and these flange halves 11f and 12f are overlapped in the thickness direction and are mutually joined by bonding or the like. The seal support flange 16 is configured by joining the flange halves 11 f and 12 f.
In the present embodiment, the first garnish 11 constitutes a composite resin molded article.

The first garnish 11 is a front wall portion 11a that forms the front wall of the convex cross-sectional portion 14a of the cowl top garnish 10, and the above-described flange half that extends upward after being inclined obliquely forward from the upper end of the front wall portion 11a. 11f, a lower wall portion 11b extending forward from the lower end of the front wall portion 11a, and a bent wall portion 11c bent at a substantially right angle downward from an end of the lower wall portion 11b. The lower wall portion 11 b constitutes a front flange 14 f of the cowl top garnish 10.
More specifically, as shown in FIG. 4, the flange half 11 f includes an inclined wall 11 f-1 extending obliquely upward from the upper end of the front wall 11 a and an upper end of the inclined wall 11 f-1. And an upper extending wall 11f-2 that bends and extends upward.

In the first garnish 11 of the present embodiment, the central region in the vehicle width direction of the front wall portion 11a and the inclined wall 11f-1 is formed of the soft second resin material R2. A portion formed of the front wall portion 11 a and the second resin material R 2 of the inclined wall 11 f-1 constitutes a main portion 22 a of the secondary molded body 22. Most of the remaining portion of the first garnish 11 except the main body portion 22a of the secondary molded body 22 is formed of the hard first resin material R1. However, in a part of a central region in the vehicle width direction of the upper extending wall 11f-2, a strip-shaped crossing portion 22b made of a soft second resin material R2 is disposed. The cross section 22b is formed to have a thickness of about half of the entire upper extension wall 11f-2, one end is connected to the main body 22a of the secondary molded body 22, and the other end is the upper extension wall 11f-2. I'm facing outside (upper).
In the present embodiment, the secondary molded body 22 is constituted by the main body portion 22 a and the cross section 22 b, and the remaining portion of the first garnish 11 is the primary molded body 21. Further, in the case of the present embodiment, the region of the upper extension wall 11f-2 of the first garnish 11 excluding the crossing portion 22b constitutes a side piece adjacent to the main portion 22a of the secondary molded body 22. .

  A communication groove 23 in which the cross portion 22 b is received is formed in a part of a central region in the vehicle width direction of the upper extension wall 11 f-2 of the first garnish 11. The communication groove 23 is provided on one side (vehicle front side) in the plate thickness direction of the upper extending wall 11f-2 and extends from the lower end to the upper end of the upper extending wall 11f-2. The communication groove 23 is filled with the second resin material R2 when the secondary molded body 22 is formed. Thereby, the above-mentioned crossing portion 22 b is formed in the communication groove 23. The communication groove 23 also serves as a passage for filling the second resin material R2 into the main body 22a of the secondary molded body 22 when the secondary molded body 22 is molded, as described in detail later.

Further, in the vicinity of the boundary with the inclined wall 11f-1 of the upper extending wall 11f-2 of the first garnish 11, a relatively narrow flange portion 24 having a projecting width is provided to project forward. . The flange portion 24 is continuously formed along the vehicle width direction on the front side of the upper extending wall 11f-2. The flange portion 24 is formed of a hard first resin material R1 and is continuously provided at the open end of the side wall of the communication groove 23 facing each other so as to straddle the communication groove 23 in the vehicle width direction. There is. Hereinafter, a region facing the communication groove 23 of the flange portion 24 will be referred to as a groove straddle portion 24 a.
The flange portion 24 constitutes a part of the primary molded body 21 and is provided in the vicinity of the boundary with the main body 22 a of the secondary molded body 22 along the boundary.

Further, at an upper end portion of the upper extension wall 11f-2 of the first garnish 11, a narrow bending piece 25 of an extension width bent toward the vehicle rear side is provided in a protruding manner. The bent piece 25 is also integrally formed on the upper end of the cross portion 22b made of the soft second resin material R2. When the first garnish 11 and the second garnish 12 are joined by abutting the flange halves 11 f and 12 f to the bent piece 25, the end face of the flange half 12 f of the second garnish 12 is abutted.
In addition, the code | symbol 26 in FIG. 4 is a protrusion for position shift prevention protrudingly provided by the primary molded body 21 part vicinity of the lower end of the front wall part 11a. The protrusions 26 are locked to the mold when the primary molded body 21 is set in the mold as described later in detail.

  The inclined wall 11f-1 of the first garnish 11 and a part of the front wall portion 11a are constituted by the secondary molded body 22 made of the soft second resin material R2 to be the main body portion 22a of the secondary molded body 22. ing. The main body portion 22a of the secondary molded body 22 extends substantially in the vertical direction with the cowl top garnish 10 attached to the vehicle body. Therefore, when a load directed downward from the outside is input to the upper surface of the hood hood 6, the load is input to the main body 22a of the secondary molded body 22 along the extending direction of the main body 22a. . Therefore, at this time, the portion constituted by the soft secondary molded body 22 is flexibly bent and deformed under load.

Next, a method of manufacturing the first garnish 11 which is a composite resin molded product will be described.
FIG. 5 is a view of the primary mold 30 for forming the primary formed body 21 and the secondary mold 31 for forming the secondary formed body 22 as viewed from below. 6 and 7 show molds corresponding to the VI-VI cross section of FIG. 5 when the primary mold 30 is clamped to the core mold 32 and the first resin material R1 is injected into the primary cavity 33. It is a figure which shows the cross section and the metal mold | die cross section corresponding to the VII-VII cross section of FIG. 5, respectively. Further, FIG. 8 shows a gold corresponding to the VIII-VIII cross section of FIG. 5 when the secondary mold 31 is clamped to the core mold 32 and the second resin material R2 is injected into the secondary cavity 34. It is a figure showing a mold section.
A pair of core molds 32 having the same shape is provided on a rotary table (not shown), and the primary mold 30 and the secondary mold 31 are disposed to face each other above the core molds 32. The core mold 32 is lifted and lowered by a lifting mechanism (not shown) to perform mold clamping and mold opening on the opposing primary mold 30 and secondary mold 31. In the case of the present embodiment, in the core mold 32, the surface of the first garnish 11 (composite resin molded product) facing the rear of the vehicle is formed.

  In the case of actually producing the first garnish 11 (composite resin molded product), after the primary molded body 21 is formed by the core mold 32 and the primary mold 30, the core mold 32 is opened and the core mold 32 is subjected to the primary molding. The rotary table is rotated 180 degrees while the molded body 21 remains. As a result, the secondary mold 31 is positioned above the core mold 32 in which the primary molded body 21 remains. In this state, the core mold 32 is clamped to the secondary mold 31, and the secondary molded body 22 is molded with the core mold 32 (including the primary molded body 21) and the secondary mold 31. Thereafter, the core mold 32 is opened, and the molded first garnish 11 (composite resin molded product) is taken out of the core mold 32. Also, during this time, the core mold 32 is clamped to the primary mold 30, and the next primary molded body 21 is formed.

  Here, as shown in FIGS. 5 and 6, the primary mold 30 is provided with a primary injection gate 35 for injecting the first resin material R1 into the primary cavity 33, and the secondary mold 31 is provided. As shown in FIGS. 5 and 8, a secondary injection gate 36 is provided for injecting the second resin material R2 into the secondary cavity 34. The primary injection gate 35 is provided at a position communicating with the lower end surface of the lower bending wall portion 11 c of the first garnish 11 (composite resin molded product). Further, the secondary injection gate 36 is provided at a position communicating with the upper end surface (upper surface of the bending piece 25) of the cross portion 22b above the first garnish 11 (composite resin molded product).

When the core mold 32 is clamped to the primary mold 30 and the first resin material R1 is injected from the primary injection gate 35 in that state, the first resin material R1 spreads into the primary cavity 33, and the primary molded body is formed. 21 are formed. At this time, an opening in which the main body 22a of the secondary molded body 22 is disposed is formed in the central region of the primary molded body 21 and the communication groove 23 is formed on the front side of the upper extension wall 11f-2. Ru.
One end side of the communication groove 23 extends to a position facing the groove spanning portion 24 a of the flange portion 24. That is, an undercut portion is formed in a portion of the flange portion 24 opposed to the groove spanning portion 24 a. For this reason, as shown in FIG. 7, the primary mold 30 of the present embodiment is provided with a mold main body 30A which is a main part, and a slide mold 30B for forming an adder cut portion.

Thereafter, the core mold 32 is clamped to the secondary mold 31. When the second resin material R2 is injected from the secondary injection gate 36 in this state, the second resin material R2 is used for the primary molded body 21. The fluid flows into the inner region of the primary molded body 21 through the communication groove 23, and the main body 22a of the secondary molded body 22 is formed. Further, the second resin material R2 solidified by the communication groove 23 forms the crossing portion 22b.
From the molded product taken out of the secondary mold 31, the shaped portion by the primary injection gate 35 and the shaped portion by the secondary injection gate 36 are cut off.

As described above, the composite resin molding (the first garnish 11) of the present embodiment has the secondary injection gate 36 for molding the secondary molding 22 at the outer end of the communication groove 23 of the primary molding 21. It can be set to For this reason, the gate mark of the secondary injection gate 36 appears only at the outer end of the crossing portion 22 b which is difficult to see from the outside. Since the communication groove 23 does not completely divide the upper extension wall 11 f-2 (side piece) of the primary molded body 21, it is possible to suppress a decrease in the rigidity of the primary molded body 21. In the case of this embodiment, almost the entire area other than the thin end surface of the first garnish 11 is a product design surface.
Therefore, when the composite resin molding (the first garnish 11) of the present embodiment is adopted, a good appearance can be obtained while suppressing the decrease in the rigidity of the upper extending wall 11f-2 (side piece) of the primary molding 21. You can get quality. Further, since it is not necessary to make the thickness larger than the thickness of the general part, it is possible to improve the degree of freedom in design and save space.

  In particular, in the composite resin molded body (first garnish 11) of the present embodiment, the second resin material R2 for molding the secondary molded body 22 is softer than the first resin material R1 for molding the primary molded body 21. Is formed of a resin material. Therefore, after the primary molded body 21 is formed of the hard first resin material R1, the soft second resin material R2 is passed through the communication groove 23 with high rigidity of the primary molded body 21 into the main body portion of the secondary molded body 22. The molded portion of 22a can be stably filled. Therefore, the product quality of the composite resin molded product is stabilized.

Further, the composite resin molding (first garnish 11) of the present embodiment is a flange portion along the boundary in the vicinity of the boundary with the main body 22a of the secondary molding 22 in the primary molding 21. 24 are integrally formed. For this reason, the rigidity in the vicinity of the boundary with the main body portion 22 a of the secondary molded body 22 of the primary molded body 21 can be enhanced by the flange portion 24.
Furthermore, the flange portion 24 is stably held by the secondary mold 31 when the primary molded body is set in the secondary mold 31. For this reason, it is possible to suppress the displacement of the primary molded body 21 due to the injection pressure of the second resin material R2.
The ridges 26 formed on the primary molded body 21 suppress positional deviation of the primary molded body 21 with respect to the core die 32.

  Furthermore, in the composite resin molded product (first garnish 11) of the present embodiment, the flange portion 24 is bridged to the mutually opposing side walls of the communication groove 23 so as to straddle the communication groove 23. For this reason, at the time of molding of the secondary molded body 22, the communication groove 23 to be a flow path of the second resin material R2 can be reinforced by the flange portion 24. Therefore, when this configuration is adopted, it is possible to suppress the deformation of the communication groove 23 portion of the primary molded body 21 when the secondary molded body 22 is molded, and to stabilize the product quality.

  In the composite resin molding (first garnish 11) of the present embodiment, the plate-like main portion 22a of the secondary molding 22 formed of the soft second resin material R2 has a load input direction from the outside It extends along the (vertical direction). For this reason, the impact due to the load input from above to the bonnet hood 6 can be effectively alleviated by the plate-like main portion 22 a of the secondary molded body 22.

Subsequently, another embodiment shown in FIGS. 9 and 10 will be described.
FIG. 9 is a cross-sectional view corresponding to FIG. 7 of the above embodiment, and FIG. 10 is a cross-sectional view corresponding to FIG. 8 of the above embodiment.
The basic configuration of the composite resin molding of another embodiment is substantially the same as that of the above embodiment. For this reason, the same reference numerals are given to the same parts as those in the above embodiment, and the redundant description will be omitted.

  In the composite resin molded body of the other embodiment, the thickness direction of the upper extending wall 11 f-2 in the area across the groove straddle portion 24 a of the flange portion 24 in the communication groove 23 formed in the primary molded body 121. It differs from the above-described configuration only in that a through portion 50 communicating with the other side (the side opposite to the side where the communication groove 23 opens) is provided. That is, in the case of the above embodiment, the bottom wall of the communication groove 23 is provided in the region of the communication groove 23 which crosses the groove bridging portion 24 a of the flange portion 24. The wall is removed by the penetration 50.

In the case of the composite resin molded product of the other embodiment, the undercut portion is not formed in the region crossing the groove spanning portion 24 a of the flange portion 24 by the above configuration. For this reason, it is possible to form a primary compact without using a slide mold as in the above embodiment. However, in the core mold 32, the convex portion 51 for forming the through portion 50 in the primary molded body 121 is formed. Moreover, in said embodiment, although the primary molded object 21 and the secondary molded object 22 were shape | molded using the common core type | mold 32, in other embodiment, it is primary by the core type | mold 32 and the primary metal mold 30. After forming the formed body 121, the secondary formed body 22 is formed by another core mold 132 without the convex portion 51 and the secondary mold 31.
Therefore, when the composite resin molding of another embodiment is adopted, the structure of the primary mold 30 can be simplified.

  The present invention is not limited to the above embodiment, and various design changes can be made without departing from the scope of the invention. For example, the composite resin molding is not limited to the first garnish 11 of the cowl top garnish 10, and may be another resin molding mounted on a vehicle or the like. Moreover, in said embodiment, although the metal mold | die opened in the upper and lower sides is used, the mold may be mold-opened in right and left.

11 ... 1st garnish (composite resin molded product)
11f-1 ... inclined wall 11f-2 ... upward extending wall (side piece)
21, 121 ... primary molded body 22 ... secondary molded body 22a ... main body portion 22b ... crossing portion 23 ... communicating groove 24 ... flange portion 24a ... groove bridging portion 50 ... penetrating portion R1 ... first resin material R2 ... second Resin material

Claims (6)

A plate-shaped primary molded body made of a first resin material and a plate-shaped secondary molded body made of a second resin material are integrated;
In a composite resin molded article in which both the primary molded body and the secondary molded body constitute a product design surface,
The primary molded body has a side piece adjacent to the main body of the secondary molded body,
The side piece has, on one side in the thickness direction, a communication groove communicating one side adjacent to the main body of the secondary molded body and the other side opposite to the one side.
The secondary molded body has the main body portion, and a crossing portion which is filled in the communication groove and one end thereof is connected to the main body portion and the other end faces the outside of the other side portion of the side piece. A composite resin molded article characterized in that   The composite resin molded article according to claim 1, wherein the primary molded body has a flange portion along the boundary portion in the vicinity of the boundary portion with the main body portion of the secondary molded body.   The composite resin molded article according to claim 2, wherein the flange portion is continuously provided on side walls facing each other of the communication groove so as to straddle the communication groove.   The penetration part connected to the other side of the thickness direction of the side piece is formed in the field which crosses the groove crossing part of the flange part among the above-mentioned communicating grooves. Composite resin molded products.   The composite resin molded article according to any one of claims 1 to 4, wherein the second resin material is formed of a resin material softer than the first resin material.   The composite resin molded article according to claim 5, wherein the plate-like main body of the secondary molded body extends along the load input direction from the outside.

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