JP5432191B2 - Manufacturing method of composite molded product - Google Patents

Description

The present invention is an invention for producing a composite molded article integrally by joining a first member and the second member.

  In pillar garnishes mounted along automobile pillars, for example, as described in Patent Document 1 (Japanese Patent Laid-Open No. 2007-69517), a garnish main body is molded by injection molding of a hard polymer material. After that, the cushion part is molded and the cushion part is joined to the garnish body part by injecting and filling the soft polymer material with the garnish body part set in the injection mold for molding the cushion part. In some cases, a pillar garnish in which a garnish body and a cushion are integrated is manufactured.

JP 2007-69517 A

  However, the pillar garnish of Patent Document 1 is, for example, a rod-like portion (injection passage) for introducing a polymer material injected from an injection gate in the cushion portion, or a portion corresponding to the end of the pillar garnish in the cushion portion. However, it is easy to hit or get caught by other members during injection molding or attachment to the vehicle. At that time, if a strong force is applied in the direction in which the cushion part moves away from the garnish body part, the cushion part will be peeled off from the garnish body part. There is a risk of malfunction.

  Therefore, the problem to be solved by the present invention is that in the composite molded product in which the first member and the second member are joined and integrated, the second member can be made difficult to peel off from the first member, and the composite molded product It is to be able to improve the quality.

The manufacturing method of the composite molded product according to claim 1 includes a first member preparing step of preparing a first member integrally provided with at least one projecting portion projecting from a surface of a joint portion joined to the second member. A first member setting step for setting the first member in the injection mold when the openable / closable injection mold for injection molding the second member is open, and closing the injection mold A cavity forming step of forming a second member molding cavity by the molding surface of the mold and the first member, and a second polymer material that is heated and melted in the second member molding cavity is injected and filled. A second member forming step of forming the member and joining and integrating the first member and the second member; and a treatment step of hardening or solidifying the second member. In the component molding cavity Of the polymeric material during filling by injection, the protruding portion is provided along the flow direction of the second polymeric material, the joining portion at least part of the protruding portion by the flow of the second polymeric material After deforming in a direction intersecting with the direction away from the surface, in the processing step, the second member is cured or solidified in a state where the projecting portion is deformed, so that the projecting portion and the joint portion of the second member are It is preferable to form an undercut portion having an undercut shape with respect to the protruding portion in the direction away from the surface of the joint portion. In this way, the composite molded product of the present invention can be produced efficiently.

In this case, as in claim 1, protrusions, if vMedia.Creating that provided as the second member forming step along the flow direction of the second polymeric material, the fluidity of the second polymeric material The projecting portion can be deformed over a wide range while ensuring the undercut portion.

Alternatively, as in claim 2 , the protrusion may be provided along a direction intersecting the flow direction of the second polymer material in the second member molding step. If it does in this way, the heat and pressure of the 2nd polymer material can be stably applied to a projection part, and a projection part can be changed stably.
According to a third aspect of the present invention, the protrusion is provided so as to be located at a portion directly connected to the injection gate of the second polymer material in the second member molding cavity in the second member molding step. Anyway. In this way, the heat and pressure of the second polymer material can be applied to the protruding portion while the heat and pressure of the second polymer material are high, and the protruding portion can be easily deformed.

Moreover, you may make it a protrusion part be provided so that it may become a continuous protrusion like Claim 4 . If it does in this way, compared with the case where a projection part is provided intermittently, a projection part can be made easy to shape | mold.

Furthermore, as in claim 5 , two or more protrusions may be provided, and at least two protrusions may be deformed in different directions by the flow of the second polymer material in the second member molding step. If it does in this way, the peeling prevention effect of the 2nd member can be given to the external force of a different direction.

Further, as in the sixth aspect , the first polymer material may be a material that can be thermally deformed at a temperature lower than the temperature during the injection molding of the second polymer material. By doing so, the temperature at the time of injection molding of the second member (second polymer material) becomes higher than the temperature at which the protrusion (first polymer material) can be thermally deformed, so that the protrusion is reliably deformed. Can be made.

FIG. 1 is a perspective view of a front pillar of a vehicle and a peripheral portion thereof showing a state where a pillar garnish is mounted according to Embodiment 1 of the present invention. FIG. 2 is a rear view of the pillar garnish. FIG. 3 is a perspective view of a main part of the pillar garnish. FIG. 4 is a side view showing a state of the protruding part of the garnish main body part and its peripheral part before molding of the cushion part. FIG. 5 is a cross-sectional view taken along the line AA in FIG. FIG. 6 is a cross-sectional view (corresponding to a cross-sectional view taken along the line A-A in FIG. 4) showing a state after the protruding portion of the garnish main body portion and the peripheral portion of the cushion portion are molded. FIG. 7 is a plan view of an injection mold of the cushion portion. FIG. 8 is a cross-sectional view of the injection mold of the cushion portion. FIG. 9 is a side view showing a state of the protruding part of the garnish main body part of Example 2 and its peripheral part before molding the cushion part. FIG. 10 is a perspective view of a main part of the pillar garnish of the third embodiment.

  Hereinafter, some embodiments embodying the mode for carrying out the present invention will be described.

A first embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1, a long pillar garnish 12 (composite molded product) is mounted along the front pillar 11 of the vehicle, and the pillar garnish 12 causes a gap between the front pillar 11 and the window plate 13 (front glass). It comes to cover.

  As shown in FIGS. 2 and 3, the pillar garnish 12 is formed by injecting a cushion portion 15 (second member) on the outer surface of the garnish main body portion 14 (first member) to form the garnish main body portion 14 and the cushion portion 15. They are joined and integrated.

  The garnish main body portion 14 is formed of a polymer material (first polymer material) for molding a main body portion, which has higher rigidity than the cushion portion 15 and is hard. As the polymer material for molding the main body, for example, AES resin (acrylonitrile ethylene propylene styrene resin) having Rockwell hardness 117 is used, and other thermoplastic synthetics such as PP (polypropylene) and hard PVC (vinyl chloride). Resin can be used.

  On the other hand, the cushion portion 15 is formed of a polymer material (second polymer material) for forming the cushion portion that is softer than the garnish main body portion 14. As the polymer material (second polymer material) for molding the cushion portion, for example, TPO (olefin-based thermoplastic elastomer) having a Shore A hardness of 83 is used. Besides, TPS (styrene-based thermoplastic elastomer), soft A thermoplastic synthetic resin such as PVC can be used.

In addition, as the polymer material for molding the main body portion, a material that can be thermally deformed at a temperature lower than a temperature (for example, 250 ° C.) at the time of injection molding of the polymer material for molding the cushion portion is used.
In addition, as the polymer material for molding the main body part and the polymer material for molding the cushion part, polymer materials that can satisfy the performance as the garnish main body part 14 and the cushion part 15 can be arbitrarily selected. When the material is selected, the garnish main body portion 14 and the cushion portion 15 are easily joined by molding the cushion portion 15, so that necessary joining strength can be easily ensured.

  As shown in FIG. 3, the garnish main body 14 includes a decorative head 16, a leg 17 that receives the decorative head 16, and a rib 18 that protrudes from the pillar-side edge of the leg 17 toward the inside of the vehicle. Are formed integrally, and a hollow portion 19 is formed inside the garnish main body portion 14. In addition, at a plurality of locations in the longitudinal direction of the rib 18, there are formed concave rib portions 20 that are recessed toward the window plate, and engagement holes 21 for engaging and holding clips and the like.

  On the other hand, the cushion portion 15 includes a pillar-side lip portion 22 joined to the pillar side of the garnish main body portion 14, a window plate-side lip portion 23 joined to the window plate side of the garnish main portion 14, and the garnish main body portion 14. The upper terminal lip part 24 and the lower terminal lip part 25 (see FIG. 2) joined to the upper terminal and the lower terminal and the rod-like part 26 joined to the concave rib part 20 of the garnish main body part 14 are integrally formed. Is formed. The rod-shaped portion 26 is a portion corresponding to an injection passage for introducing a polymer material for forming a cushion portion injected from an injection gate 35 described later.

  The pillar-side lip portion 22 is joined to the pillar-side back surface of the decorative head 16 of the garnish main body portion 14, and the window plate-side lip portion 23 is connected to the window plate-side back surface of the leg portion 17 of the garnish main body portion 14. Be joined. The rod-shaped portion 26 is joined to the side surface or the like on the pillar side of the concave rib portion 20 of the garnish main body portion 14.

  As shown in FIGS. 4 to 6, the surface of the concave rib portion 20 (concave rib portion 20) is joined to the cushion portion 15 (bar-shaped portion 26) of the concave rib portion 20 of the garnish main body portion 14. A plurality of (for example, two) projecting portions 27 projecting from the pillar-side side surface are integrally provided. 4 and 5 are views showing a state of the cushion portion 15 before injection molding, and FIG. 6 is a view showing a state of the cushion portion 15 after injection molding.

  In the first embodiment, as shown in FIGS. 4 and 5, the two projecting portions 27 are provided so as to be continuous ridges, and the projecting portions 27 are compared with the case where the projecting portions 27 are provided intermittently. It is designed to facilitate molding. The protruding portion 27 protrudes in a direction (direction indicated by an arrow F in FIG. 5) intersecting the flow direction (direction indicated by an arrow I in FIG. 4) of the polymer material for forming the cushion portion in a cushion portion forming step to be described later. In this state, it is provided so as to extend along the flow direction of the polymer material for forming the cushion part. Further, as shown in FIG. 5, the protrusion 27 is formed such that the height dimension h is larger than the width dimension t, and has a shape that is easily deformed (inclined, curved, or bent) in the width direction.

  Further, as shown in FIG. 6, the protrusion 27 is a direction in which the two protrusions 27 are separated from the surface of the concave rib portion 20 (joint portion) due to the flow of the polymer material for forming the cushion portion in the cushion portion forming step described later. It is deformed in a direction intersecting with (direction indicated by arrow F in FIG. 6) and in different directions (directions in which the tip ends of the two protruding portions 27 are separated from each other). Thereby, after the injection molding of the cushion portion 15, the two protruding portions 27 are deformed (inclined, curved, or bent) in directions different from each other in a direction intersecting the direction away from the surface of the concave rib portion 20. The undercut shape (with the protruding portion 27 and the protruding portion 27) between the protruding portion 27 and the recessed rib portion 20 of the cushion portion 15 (rod-shaped portion 26) in the direction away from the surface of the recessed rib portion 20. An undercut portion 28 having a shape that is in an engaged state is formed.

Next, the manufacturing method of the pillar garnish 12 is demonstrated using FIG.7 and FIG.8.
When manufacturing the pillar garnish 12, first, a main body forming step (first member preparing step) is performed. In this body portion molding step, a polymer material for body portion molding is injected and filled into a cavity of an injection mold (not shown) for injection molding the garnish body portion 14 and a gas for forming a hollow portion ( For example, the gas assisted injection molding in which nitrogen gas is injected is performed by the full shot method or the short shot method, thereby forming the garnish main body portion 14 having the hollow portion 19 and provided with the protruding portion 27.

  Thereafter, the cushion portion 15 is injection molded. As shown in FIG. 7, the injection mold 29 for injection molding the cushion portion 15 includes the cushion portions 15 of the two pillar garnishes 12 (the pillar garnish for the right front pillar and the pillar garnish for the left front pillar) simultaneously. It can be molded. As shown in FIG. 8, the injection mold 29 includes a fixed mold 30, a movable mold 31 that can move in the vertical direction with respect to the fixed mold 30, and two movable in the left-right direction with respect to the fixed mold 30. When the injection mold 29 is closed with the garnish main body 14 set (placed) in the injection mold 29, the outer surface of the garnish main body 14 (cushion 15) is formed. Cushion part molding cavity 34 for molding cushion part 15 by molding surface of injection mold 29 and garnish body part 14 while fixing garnish main body part 14 by sandwiching a part other than the part to be molded. Is to be formed.

  The injection mold 29 includes a pillar-side injection gate 35 and a window plate-side injection gate 36 for injecting a polymer material for molding the cushion portion, respectively, at a plurality of locations along the longitudinal direction of the cushion portion molding cavity 34. Is provided. The injection gate 35 on the pillar side is provided so as to inject the polymer material for molding the cushion portion into the portion (injection passage) 34a for molding the rod-shaped portion 26 of the cavity 34 for molding the cushion portion. The gate 36 is provided so as to inject a polymer material for forming the cushion portion into a portion 34c of the cushion portion forming cavity 34 for forming the window plate side lip portion 23. The protruding portion 27 is provided so as to be positioned at a portion 34a (that is, a portion directly connected to the injection gate 36) of the cushion portion forming cavity 34 for forming the rod-shaped portion 26 in the cushion portion forming cavity 34 described later. A pillar-side injection gate 35 is positioned directly above the intermediate position of the portion 27.

  The polymer material for molding the cushion part, which is injected from an injection nozzle (not shown) of the injection molding machine and heated and melted, passes through the path of the runner 37-> sprue 38, 39-> injection gates 35, 36-> cushion part molding cavity 34. To flow. At that time, the molten polymer material injected from the pillar-side injection gate 35 fills the portion 34b for forming the pillar-side lip portion 22 through the portion 34a for forming the rod-shaped portion 26 of the cushion portion forming cavity 34. The molten polymer material injected from the injection gate 36 on the window plate side is filled in a portion 34 c of the cushion portion forming cavity 34 for forming the window plate side lip portion 23. Further, the molten polymer material may be formed by forming the upper terminal lip portion 24 (not shown) or the lower terminal lip portion from the portion 34b forming the pillar side lip portion 22 or the portion 34c forming the window plate side lip portion 23. A portion (not shown) for molding 25 is also filled.

  The temperature at the tip of the injection nozzle is set to a temperature (for example, 250 ° C.) suitable for injection molding of the polymer material for forming the cushion part. Further, the injection gate 35 is provided so as to provide a communication channel for directly communicating the portion 34b for forming the pillar side lip portion 22 and the portion 34c for forming the window plate side lip portion 23 of the cavity 34 for forming the cushion portion. Any of 36 may be omitted. Moreover, you may make it use the hot runner which can heat a polymer material within an injection mold.

  In the case of manufacturing the pillar garnish 12, the injection molding die 29 for injection molding the cushion portion 15 is opened after the garnish main body portion 14 is injection-molded by performing the main body portion molding step described above. A garnish body part setting process (first member setting process) for setting the garnish body part 14 at a predetermined position in the injection mold 29 is executed.

  Thereafter, the injection mold 29 is closed, the outer surface of the garnish main body 14 (the portion other than the portion where the cushion portion 15 is molded) is clamped to fix the garnish main body 14, and the molding surface of the injection mold 29 And a garnish main body portion 14 to execute a cavity forming step for forming a cushion portion forming cavity 34.

  After that, the cushion portion molding cavity 34 is injected and filled with a polymer material for molding the cushion portion, and the cushion portion 15 is molded, and the cushion portion 15 is joined to the garnish main body portion 14 to garnish. A cushion part forming process (second member forming process) for integrating the main body part 14 and the cushion part 15 is executed.

  In this cushion part molding step, when the cushion part molding polymer material is injected and filled into the cushion part molding cavity 34, the two protruding parts 27 are formed into concave ribs by the flow of the cushion part molding polymer material. Deformation (inclination, bending, or bending) in a direction that intersects the direction away from the surface of the portion 20 (the direction indicated by the arrow F in FIG. 6) and in a direction that is different from each other (the direction in which the distal ends of the two protruding portions 27 are separated from each other) Let

  In this case, the protrusion 27 is provided so as to be positioned in a portion 34a of the cushion portion molding cavity 34 for molding the rod-shaped portion 26 (that is, a portion directly connected to the injection gate 36). The heat and pressure of the polymer material for forming the cushion portion can be applied to the protrusion 27 in a state where the heat and pressure of the polymer material are high, and the protrusion 27 can be easily deformed. Moreover, since the polymer material for molding the main body portion is a material that can be thermally deformed at a temperature lower than the temperature at the time of injection molding of the polymer material for molding the cushion portion, the cushion portion 15 (polymer for molding the cushion portion) is used. The temperature at the time of injection molding of the material becomes higher than the temperature at which the protrusion 27 (polymer material for forming the main body) can be thermally deformed, and the protrusion 27 can be reliably deformed.

  Then, the process process which hardens or solidifies the cushion part 15 (polymer material for cushion part shaping | molding) is performed. In this processing step, the cushion portion 15 is cured or solidified in a state where the protrusion portion 27 is deformed, so that a concave rib is formed between the protrusion portion 27 and the concave rib portion 20 in the cushion portion 15 (rod-like portion 26). An undercut portion 28 having an undercut shape with respect to the protruding portion 27 in a direction away from the surface of the portion 20 is formed.

  Thereafter, the injection molding die 29 is opened, and a take-out step of taking out the pillar garnish 12 integrated by joining the garnish main body portion 14 and the cushion portion 15 is executed. Thereby, manufacture of the pillar garnish 12 is completed.

  In the first embodiment described above, two protrusions 27 are provided on the concave rib portion 20 (joint portion of the cushion portion 15 with the rod-like portion 26) of the garnish main body portion 14, and the cushion portion 15 is injection molded. The two projecting portions 27 are deformed (inclined, curved, or bent) in a direction intersecting with the direction away from the surface of the concave rib portion 20, so that the projecting portion 27 and the concave shape of the rod-shaped portion 26 of the cushion portion 15 are recessed. Since the undercut part 28 which becomes an undercut shape with respect to the protrusion part 27 in the direction away from the surface of the concave rib part 20 is formed between the rib part 20, the concave rib part 20 of the garnish main body part 14 is formed. The projecting portion 27 and the undercut portion 28 of the rod-shaped portion 26 of the cushion portion 15 are engaged. Accordingly, even when an external force is applied in a direction in which the rod-shaped portion 26 of the cushion portion 15 is separated from the concave rib portion 20 of the garnish main body portion 14 during injection molding or attachment work to the vehicle, the rod-shaped portion 26 is removed from the concave rib portion 20. It can be made difficult to peel off, the peeling of the rod-like portion 26 can be prevented, and the quality of the pillar garnish 12 can be improved.

  In the first embodiment, since the garnish main body 14 is formed of a harder material having higher rigidity than the cushion portion 15, the protruding portion 27 of the garnish main body portion 14 and the undercut portion 28 of the cushion portion 15. Can be further strengthened, and the effect of preventing the cushion part 15 (rod-like part 26) from peeling off can be enhanced.

  Furthermore, in the first embodiment, since the two protruding portions 27 are deformed (inclined, curved, or bent) in different directions, the effect of preventing the cushion portion 15 (rod-shaped portion 26) from peeling off against external forces in different directions is obtained. You can have it.

  In Example 1, since the protrusion 27 is provided along the flow direction of the polymer material for forming the cushion portion in the cushion portion forming step, the fluidity of the polymer material for forming the cushion portion is ensured. However, the undercut portion 28 can be formed by deforming the projecting portion 27 over a wide range.

  Next, Embodiment 2 of the present invention will be described with reference to FIG. However, description of substantially the same parts as those in the first embodiment will be omitted or simplified, and different parts from the first embodiment will be mainly described.

  In the second embodiment, as shown in FIG. 9, the two protruding portions 40 intersect with the flow direction of the polymer material for forming the cushion portion (the direction indicated by the arrow I in FIG. 9) in the cushion portion forming step. It is provided so as to extend along the direction (oblique direction). Further, the two projecting portions 40 are formed so that the distance between both becomes narrower and the width dimension becomes narrower as it goes from the upstream side to the downstream side in the flow direction of the polymer material for molding the cushion portion. Thereby, since the space | interval of the protrusion parts 40 is wide in the upstream, it is hard to prevent the flow of the polymer material for molding the cushion part, and the distance between the protrusions 40 becomes narrower as it goes downstream, so that the protrusion 40 is stable. Thus, the pressure can be applied, and the width of the protrusion 40 becomes narrower as it goes downstream, so that the protrusion 40 can be easily deformed.

  In the second embodiment described above, the protrusion 40 is provided so as to extend along the direction intersecting the flow direction of the polymer material for forming the cushion portion in the cushion portion forming step. The heat and pressure of the polymer material can be stably applied to the protrusion 40, and the protrusion 40 can be stably deformed.

  Next, Embodiment 3 of the present invention will be described with reference to FIG. However, description of substantially the same parts as those in the first embodiment will be omitted or simplified, and different parts from the first embodiment will be mainly described.

  In each of the first and second embodiments, the protrusions 27 and 40 are provided on the concave rib portion 20 of the garnish main body portion 14. However, in the third embodiment, as shown in FIG. 10, the legs of the garnish main body portion 14 are provided. Plural (for example, two) projecting portions 41 projecting from the surface of the leg portion 17 (the back surface of the leg portion 17 on the window plate side) at the joint portion of the portion 17 with the cushion portion 15 (window plate side lip portion 23). Is provided. After the injection molding of the cushion portion 15, the two protruding portions 41 are deformed (inclined, curved, or bent) in directions that intersect with the direction away from the surface of the leg portion 17 and are different from each other. Between the protruding portion 41 and the leg portion 17 of the (window plate side lip portion 23), an undercut shape (engaged state with the protruding portion 41) with respect to the protruding portion 41 in a direction away from the surface of the leg portion 17. The undercut portion 42 is formed in such a shape.

  Note that when the protruding portion 41 is provided so as to protrude in a direction intersecting the die cutting direction of the injection molding die of the garnish main body portion 14, the die cutting of the injection molding die of the garnish main body portion 14 is prevented. It is preferable to provide it so as to protrude in a direction along the direction. By doing so, the protruding portion 41 can be formed simultaneously with the formation of the garnish main body portion 14.

  In the third embodiment described above, between the protruding portion 41 and the leg portion 17 of the window plate side lip portion 23 of the cushion portion 15, the protruding portion 41 is underlined in the direction away from the surface of the leg portion 17. Since the undercut portion 42 having a cut shape is formed, the protruding portion 41 of the leg portion 17 of the garnish main body portion 14 and the undercut portion 42 of the window plate side lip portion 23 of the cushion portion 15 are brought into an engaged state. Thus, even when an external force is applied in the direction in which the window plate side lip portion 23 of the cushion portion 15 is separated from the leg portion 17 of the garnish main body portion 14 at the time of injection molding or attachment work to the vehicle, the window plate from the leg portion 17 is applied. The side lip portion 23 can be made difficult to peel off, and the window plate side lip portion 23 can be prevented from peeling off.

  In addition, the shape, direction, number, etc. of the protrusions are not limited to those described in the first to third embodiments, and may be appropriately changed. For example, along the flow direction of the polymer material for forming the cushion part The protrusions are provided intermittently, or the protrusions are provided intermittently along a direction (an oblique direction or a right angle direction) intersecting the flow direction of the polymer material for forming the cushion part. May be. Some protrusions are provided along the flow direction of the polymer material for forming the cushion part, and other protrusions are provided along the direction intersecting the flow direction of the polymer material for forming the cushion part. May be. Further, the protruding portion may be provided in a curved shape (for example, an arc shape) or a bent shape (for example, a V shape) instead of a linear shape.

  In each of Examples 1 to 3, the garnish main body is formed by gas assist injection molding. However, the garnish main body is not limited to this, and the garnish main body forming method may be changed as appropriate. You may make it shape | mold the garnish main-body part which does not have a hollow part by injection molding or extrusion molding. The garnish main body may be manufactured on a pillar garnish manufacturing line, but may be obtained from the outside.

  In addition, the present invention is not limited to the pillar garnish mounted along the front pillar of the automobile, for example, the pillar garnish mounted along the center pillar and the rear pillar, the body side molding mounted on the side body panel, Composite molding in which the first member and the second member are joined and integrated, such as wheel arch molding (including mudguard) mounted along the wheel arch and belt molding mounted along the lower edge of the door opening window. The present invention can be implemented by applying the present invention.

  DESCRIPTION OF SYMBOLS 12 ... Pillar garnish (composite molded product), 14 ... Garnish main part (1st member), 15 ... Cushion part (2nd member), 16 ... Decoration head, 17 ... Leg part, 18 ... Rib, 20 ... Concave rib , 22 ... Pillar side lip part, 23 ... Window plate side lip part, 26 ... Rod-like part, 27 ... Projection part, 28 ... Undercut part, 29 ... Injection mold, 34 ... Cavity part molding cavity (second member) Cavity for molding), 35, 36 ... Injection gate, 40 ... Projection, 41 ... Projection, 42 ... Undercut

Claims (6)

A method of manufacturing a composite molded article obtained by joining and integrating a first member made of a first polymer material and a second member made of a second polymer material,
A first member preparing step of preparing a first member integrally provided with at least one projecting portion projecting from a surface of a joint portion joined to the second member;
A first member setting step of setting the first member in the injection mold when the openable / closable injection mold for injection molding the second member is open;
A cavity forming step of closing the injection mold and forming a second member molding cavity by the molding surface of the injection mold and the first member;
The second member is molded by injecting and filling the second polymer material heated and melted into the second member molding cavity, and the first member and the second member are joined and integrated. A second member forming step;
A treatment step of curing or solidifying the second member,
In the second member molding step, when the second polymer material is injected and filled into the second member molding cavity, the projecting portion is provided so as to follow the flow direction of the second polymer material. And at least part of the protrusion is deformed in a direction intersecting the direction away from the surface of the joint by the flow of the second polymer material, and then the protrusion is deformed in the processing step. By curing or solidifying the second member in a state, an undercut shape is formed with respect to the projecting portion in a direction away from the surface of the joint portion between the projecting portion and the joint portion of the second member. The manufacturing method of the composite molded product characterized by forming undercut part which becomes. A method of manufacturing a composite molded article obtained by joining and integrating a first member made of a first polymer material and a second member made of a second polymer material,
A first member preparing step of preparing a first member integrally provided with at least one projecting portion projecting from a surface of a joint portion joined to the second member;
A first member setting step of setting the first member in the injection mold when the openable / closable injection mold for injection molding the second member is open;
A cavity forming step of closing the injection mold and forming a second member molding cavity by the molding surface of the injection mold and the first member;
The second member is molded by injecting and filling the second polymer material heated and melted into the second member molding cavity, and the first member and the second member are joined and integrated. A second member forming step;
A treatment step of curing or solidifying the second member,
In the second member molding step, when the second polymer material is injected and filled into the second member molding cavity, the projecting portion intersects the flow direction of the second polymer material. In the processing step, after being deformed in a direction intersecting with a direction away from the surface of the joint portion by providing at least a part of the protrusion by flow of the second polymer material. The protrusion in the direction away from the surface of the joint between the protrusion and the joint of the second member by curing or solidifying the second member in a state where the protrusion is deformed. An undercut portion having an undercut shape is formed with respect to the manufacturing method of a composite molded product. A method of manufacturing a composite molded article obtained by joining and integrating a first member made of a first polymer material and a second member made of a second polymer material,
A first member preparing step of preparing a first member integrally provided with at least one projecting portion projecting from a surface of a joint portion joined to the second member;
A first member setting step of setting the first member in the injection mold when the openable / closable injection mold for injection molding the second member is open;
A cavity forming step of closing the injection mold and forming a second member molding cavity by the molding surface of the injection mold and the first member;
The second member is molded by injecting and filling the second polymer material heated and melted into the second member molding cavity, and the first member and the second member are joined and integrated. A second member forming step;
A treatment step of curing or solidifying the second member,
In the second member molding step, when the second polymer material is injected and filled into the second member molding cavity, the projecting portion is the second member molding cavity. Provided so as to be located at a portion directly connected to the injection gate of the polymer material, and by the flow of the second polymer material, at least a part of the protrusion is deformed in a direction intersecting the direction away from the surface of the joint. Then, in the processing step, the second member is cured or solidified in a state where the projecting portion is deformed, so that the joint portion is interposed between the projecting portion and the joint portion of the second member. An undercut portion having an undercut shape with respect to the protruding portion in a direction away from the surface of the surface is formed. The method of manufacturing a composite molded product according to any one of claims 1 to 3 , wherein the protrusion is provided so as to be a continuous protrusion. The projecting portion is provided two or more, any of claims 1 to 4, characterized in that at least two projections by the flow of the second polymeric material in said second member forming step is deformed in different directions A method for producing a composite molded product according to claim 1. Said first polymeric material, the second composite molded article according to any one of claims 1 to 5, characterized in that at a temperature lower than the temperature at the time of injection molding is possible thermal deformation of the polymeric material Production method.

Images