WO2018061906A1 - 樹脂部品及びその成形方法、成形装置 - Google Patents
樹脂部品及びその成形方法、成形装置 Download PDFInfo
- Publication number
- WO2018061906A1 WO2018061906A1 PCT/JP2017/033828 JP2017033828W WO2018061906A1 WO 2018061906 A1 WO2018061906 A1 WO 2018061906A1 JP 2017033828 W JP2017033828 W JP 2017033828W WO 2018061906 A1 WO2018061906 A1 WO 2018061906A1
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- WIPO (PCT)
- Prior art keywords
- resin
- molding
- base material
- dissimilar
- different material
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K37/00—Dashboards
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
- B60R21/215—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components characterised by the covers for the inflatable member
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
- B60R21/215—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components characterised by the covers for the inflatable member
- B60R21/2165—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components characterised by the covers for the inflatable member characterised by a tear line for defining a deployment opening
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
- B29C37/0053—Moulding articles characterised by the shape of the surface, e.g. ribs, high polish
- B29C37/0057—Moulding single grooves or ribs, e.g. tear lines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/1635—Making multilayered or multicoloured articles using displaceable mould parts, e.g. retractable partition between adjacent mould cavities
- B29C45/1639—Removable partitions between adjacent mould cavity portions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/1657—Making multilayered or multicoloured articles using means for adhering or bonding the layers or parts to each other
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
- B29L2031/3005—Body finishings
- B29L2031/3038—Air bag covers
Definitions
- the present invention relates to a resin component made of a plurality of resin materials, a molding method thereof, and a molding apparatus.
- the airbag door is formed separately from the instrument panel of the vehicle, is fitted into the opening of the instrument panel, and is attached to the instrument panel.
- the instrument panel and the airbag door may be integrally formed by injection molding (for example, see Patent Document 1).
- an object of the present invention is to provide a resin component, a molding method thereof, and a molding apparatus capable of improving the bonding strength.
- the resin component of the present invention is a resin component in which a first resin portion made of a first resin material and a second resin portion made of a second resin material are joined, wherein the first resin portion and the first resin portion One of the two resin portions enters toward the other, and the entry portion has a plurality of intermittent recesses.
- the entry portion from one of the first resin portion and the second resin portion to the other has a plurality of intermittent recesses, there is no such recess. Therefore, the bonding area between the first resin portion and the second resin portion can be improved.
- the plurality of intermittent recesses are arranged in the entering portion along a direction orthogonal to the entering direction.
- the method for molding a resin part according to the present invention includes a first molding part in which the first resin part of the resin part after molding is molded and a second molding in which the second resin part of the resin part after molding is molded.
- the first resin material is supplied to the first molding part and the second resin material is supplied to the second molding part with respect to the cavity in which a plurality of protrusions are arranged at the boundary portion with the part. It supplies with the supply pressure different from the supply pressure of a said 1st resin material, It is characterized by the above-mentioned.
- the larger one of the first resin material and the second resin material enters the other through the gap between the plurality of protrusions arranged in the cavity. And the degree of this penetration differs in parts.
- the first resin portion and the second resin portion are formed by having a plurality of recesses in the entry portion from one of the first resin portion and the second resin portion to the other. It is possible to improve the bonding strength.
- a resin component molding apparatus is a resin component molding apparatus in which a first resin portion made of a first resin material and a second resin portion made of a second resin material are joined, and after molding A plurality of protrusions are disposed at a boundary portion between a first molded part where the first resin part of the resin part is molded and a second molded part where the second resin part of the molded resin part is molded.
- the larger one of the first resin material and the second resin material enters the other through the gap between the plurality of protrusions arranged in the cavity. And the degree of this penetration changes with parts.
- the resin part which is a molded product since the entering portion from one of the first resin portion and the second resin portion to the other has a plurality of concave portions, the first resin portion and the second resin It is possible to improve the bonding strength with the part.
- the partial conceptual top view of the instrument panel which concerns on embodiment of this invention The typical sectional view of an instrument panel. It is sectional drawing which shows typically the injection mold of the shaping
- the frame-shaped core shows the state located in a separation position.
- the instrument panel 10 according to an embodiment of the resin component of the present invention will be described.
- an instrument panel 10 of a vehicle is composed of a base material M1 corresponding to the first resin material of the present invention, the base material portion 20 corresponding to the first resin portion of the present invention, and the present invention.
- the second resin material is made of a different material M2 different from the base material M1, and is formed of a different material portion 30 corresponding to the second resin portion of the present invention.
- the instrument panel 10 is attached with a skin, a meter visor, a decorative board, and the like.
- the base material portion 20 constitutes a main body portion of the instrument panel 10.
- the base material portion 20 is formed of a base material M1, which is a resin material usually used for instrument panels, here, polypropylene (PP).
- An opening 21 is formed in the base material portion 20.
- the dissimilar material portion 30 constitutes a door for a passenger airbag device (not shown) (also referred to as a lid, hereinafter referred to as an airbag door).
- the dissimilar material part 30 is formed of a dissimilar material M2, which is a resin material normally used for an airbag door, here, an olefin-based elastomer (TPO).
- TPO olefin-based elastomer
- the thermal contraction rate of the different material M2 is larger than the thermal contraction rate of the base material M1.
- the dissimilar material portion 30 has a fragile portion 31 that is easily broken when the bag body of the airbag device is deployed.
- the fragile portion 31 is, for example, an H-shaped tear line formed thinner than other portions.
- the base material part 20 and the dissimilar material part 30 are joined so that the base material part 20 may surround the dissimilar material part 30 over the entire circumference.
- the dissimilar material portion 30 is disposed in the opening 21 so as to close the opening 21 formed in the base material portion 20.
- the base material portion 20 and the different material portion 30 are overlapped with each other in the thickness direction (vertical direction) of the instrument panel 10 at the boundary portion.
- the different material M2 enters the base material portion 20 side from the different material portion 30 side and is mixed with the base material M1 and protrudes. Forming.
- the base material portion 20 and the dissimilar material portion 30 are firmly joined by the entering portion 33.
- the base material M1 is a white background
- the different material M2 is a black background
- the mixed portion 33 in which these materials are mixed is schematically shown with a density corresponding to the ratio of the different material M2.
- the shape of the penetration part 33 shown in FIG. 2 and the mixing condition of the dissimilar material M2 are only examples shown typically.
- the base material M ⁇ b> 1 and the different material M ⁇ b> 2 are also mixed in a direction (horizontal plane direction) orthogonal to the thickness direction of the instrument panel 10.
- the entering portion 33 is mixed and spread with the base material M1 so that the different material M2 enters the base material portion 20 side from the different material portion 30 side, and the entrance margin of the different material M2 into the base material M1 is increased. It is interrupted at many places, so to speak. In this way, the entry portion 33 has a plurality of intermittent recesses.
- the base material part 20 and the dissimilar material part 30 are more firmly joined by this recessed part.
- Each of the entering portions 33 has a generally conical shape or a shape in which this spreads in combination with the entry of the different material M2 into the base material M1 in the thickness direction of the instrument panel 10 described above.
- the entering portion 33 where the different material M2 has entered the base material M1 is schematically shown with a density corresponding to the concentration of the different material M2.
- the shape of the penetration part 33 shown in FIG. 1 is only an example shown typically.
- a plurality of through holes 32 are formed in a portion closer to the dissimilar material portion 30 than the entering portion 33, that is, in a portion close to the boundary portion of the dissimilar material portion 30. ing.
- the plurality of through holes 32 are formed so as to surround the fragile portion 31.
- each through-hole 32 has a V-shape when viewed from the top, and the other through-holes 32 are within a region of three sides connecting three end points of the V-shape.
- the two V-shaped connecting points, that is, the V-shaped projecting points are positioned so as to overlap each other.
- each through-hole 32 is continuously arranged in a row with a V-shape overlapping in parallel with the longitudinal direction of the boundary portion between the base material portion 20 and the dissimilar material portion 30.
- the V-shape of each through hole 32 is, for example, The line width is 1.0 mm, the angle is 30 degrees, the length of one side is 25 mm, and the interval between adjacent V-shaped sides is 8 mm.
- the shape of the through hole 32 is not limited to the V shape.
- the shape of the through hole 32 preferably has at least a bent portion such as a U shape, a W shape, or a wave shape.
- the shape of the through-hole 32 may not have a bent portion, and may be a linear shape, a circular shape, an elliptical shape, or the like.
- the shape of the through hole 32 may be a mixture of a plurality of shapes.
- the adjacent through holes 32 overlap, but the present invention is not limited to this. Further, only some of the plurality of through holes 32 may overlap.
- the plurality of through holes 32 are preferably arranged in a row continuously in parallel with the longitudinal direction of the boundary portion between the base material portion 20 and the dissimilar material portion 30, but are not limited thereto.
- it may be arranged in a plurality of rows, may be staggered, randomly or sparsely arranged.
- each through hole 32 may have a different cross-sectional shape in the thickness direction. And the inner wall surface which the through-hole 32 opposes in the thickness direction may contact
- a hole having a bottom (bottomed hole, groove) may be provided. Even when the bottomed hole is provided, various shapes can be adopted as described in the case of the through hole 32.
- the bottomed hole is opened on the back surface of the dissimilar material portion 30. Therefore, since the opening of a bottomed hole does not exist in the surface which is the design surface of the instrument panel 10, it becomes possible to aim at the improvement of the external appearance.
- the injection mold 100 has an upper mold 110, a lower mold 120, and a core 130. Clamping is performed by moving the lower mold 120 relatively close to the upper mold 110, and mold opening is performed when the lower mold 120 is relatively separated from the upper mold 110.
- the cavity 140 has a base material part molding part 141 and a dissimilar material part molding part 142.
- the base material portion molding portion 141 corresponds to the first resin portion molding portion of the present invention
- the different material portion molding portion 142 corresponds to the second resin portion molding portion of the present invention.
- the upper mold 110 includes a base material supply nozzle 112 that injects the base material M1 into the base material portion molding portion 141, a different material supply nozzle 111 that injects a different material M2 into the different material portion molding portion 142, and a frame-shaped core 113. Yes.
- the substrate supply nozzle 112 corresponds to the first supply nozzle of the present invention
- the different material supply nozzle 111 corresponds to the second supply nozzle of the present invention.
- the frame-shaped core 113 is disposed so as to surround the periphery of the different material supply nozzle 111.
- the frame-shaped core 113 has a function of temporarily separating a part of the cavity 140 from other areas of the cavity 140.
- the partial region of the cavity 140 separated by the frame-shaped core 113 constitutes the dissimilar material part forming part 142 in which the dissimilar material M2 injected from the dissimilar material supply nozzle 111 is filled and the dissimilar material part 30 is formed.
- Other regions of the cavity 140 other than the partial region constitute a base material portion molding portion 141 in which the base material portion 20 is molded by being filled with the base material M1 injected from the base material supply nozzle 112.
- the frame-shaped core 113 is made of a base material so that the different material M2 filled in the inner region partitioned by the frame-shaped core 113 and the substrate M1 filled in the outer region partitioned by the frame-shaped core 113 do not come into contact with each other. It has a function of separating M1 and the different material M2 from each other.
- the dissimilar material portion forming portion 142 is provided with a convex portion for forming the fragile portion 31 in the dissimilar material portion 30 so as to protrude upward from the lower mold 120.
- the frame-shaped core 113 is configured to be movable in the direction toward the lower mold 120 with respect to the upper mold 110.
- the frame-shaped core 113 is a frame body having a substantially rectangular outer frame shape having a rectangular through hole 113 a at the center.
- the cross section in the direction from the upper mold 110 to the lower mold 120 in the portion corresponding to each side of the outer frame of the frame-shaped core 113 is an L-shape with the upper mold 110 side as the bottom, as shown in FIGS. It has become.
- the upper mold 110 has an injection portion peripheral portion 114 provided so as to surround the periphery of the tip portion of the different material supply nozzle 111.
- the upper portion 114a and the lower portion 114b of the injection portion peripheral portion 114 are expanded in a substantially flange shape over the entire portion of the central portion 114c.
- the central portion 114c of the injection portion peripheral portion 114 has an outer peripheral surface that follows the inner peripheral surface of the through hole 113a of the frame-shaped core 113, and the frame-shaped core 113 is configured to be movable along the outer peripheral surface. ing.
- the lower surface of the lower portion 114b of the injection portion peripheral portion 114 is positioned to face the upper surface of the lower mold 120 constituting the lower surface of the dissimilar material portion molding portion 142 of the cavity 140.
- a space surrounded by these opposing surfaces and the inner wall surface of the side wall 113b of the frame-shaped core 113 in contact with the lower mold 120 constitutes the dissimilar material part forming portion 142 of the cavity 140.
- slide guides 115 each having a columnar shape extend upward at four corners of the upper surface of the frame-shaped core 113, and each slide guide 115 is formed in the upper mold 110 and has a columnar shape (not shown).
- the frame-shaped core 113 is configured to be movable with respect to the upper mold 110 main body by being guided by the hole 116 (see FIG. 3).
- the tip portions of the pistons of a pair of cylinders 117 fixed to the upper mold 110 are connected to both ends of the upper end surface of the frame-shaped core 113 in the longitudinal direction.
- the pistons of the cylinders 117 advance and retract, the frame-shaped core 113 advances and retracts with respect to the upper mold 110 main body.
- the piston of the cylinder 117 extends and the frame-shaped core 113 moves toward the lower mold 120 side and comes into contact with the upper surface of the lower mold 120 as shown in FIG. It is located at a separation position where the cavity 140 is separated into the base material part molding part 141 and the dissimilar material part molding part 142.
- the frame-shaped core 113 When the piston of the cylinder 117 is shortened and the frame-shaped core 113 is separated from the lower mold 120 and accommodated in the upper mold 110 as shown in FIG.
- the part forming part 141 and the dissimilar material part forming part 142 are not separated but are located in an integrated position.
- the frame-shaped core 113 can selectively move between the separation position and the integral position.
- the core 130 is a mold for forming the through hole 32 in the different material portion 30.
- the core 130 is fixed to the lower mold 120 by a known means. However, the core 130 may be fixed to the upper mold 110 or may be further divided and fixed to the upper mold 110 and the lower mold 120.
- the core 130 is configured so that a plurality of protrusions 131 surround the inner side of the side wall 113b of the frame-shaped core 113 over the entire circumference in a state where the frame-shaped core 113 is located at the separation position.
- the shape of each protrusion 131 is V-shaped, and when the thickness of the base material portion 20 and the different material portion 30 is as described above, for example, the line width is 1.0 mm, the angle is 30 degrees, and one side is The length is 25 mm, and the interval between adjacent V-shaped sides is 8 mm.
- the protrusion 131 of the core 130 is located in the cavity 140 over the entire circumference in a portion inside the outer peripheral portion of the dissimilar material forming portion 142.
- the molding method of the instrument panel 10 includes a cavity separation step S11, a base material filling step S12, a different material filling step S13, a frame-shaped core opening step S14, a different material pressing step S15, a protrusion retracting step S16, and a mold opening step S17.
- the cavity separation step S11 is performed.
- the lower mold 120 is moved forward relative to the upper mold 110 to perform mold clamping, thereby forming a cavity 140 as shown in FIG.
- the frame-shaped core 113 exists in the separation position, and the cavity 140 is separated into the base material part molding part 141 and the dissimilar material part molding part 142 by the frame-shaped core 113.
- the protrusion 131 of the core 130 is located in the cavity 140 over the entire circumference in a portion inside the outer peripheral portion of the dissimilar material portion forming portion 142.
- the base material filling step S12 is performed.
- the base material M1 is injected from the base material supply nozzle 112 to fill the base material portion forming portion 141.
- the first pressure acts on the base material M1 in the base material portion molding unit 141 by the pressure at which the base material M1 is injected from the base material supply nozzle 112.
- the pressure for injecting the base material M1 is controlled by a control means (not shown).
- a different material filling step S13 is performed.
- the different material M2 is injected from the different material supply nozzle 111 (see FIG. 3) and filled into the different material portion forming portion 142.
- a second pressure larger than the first pressure is acting on the different material M2 in the different material portion forming portion 142 due to the pressure at which the different material M2 is injected from the different material supply nozzle 111.
- the pressure for injecting the different material M2 is controlled by control means (not shown).
- the frame-shaped core opening step S14 is performed.
- the frame-shaped core opening step S14 the frame-shaped core 113 is lowered while maintaining the state in which the first pressure acts on the base material M1 and the second pressure acts on the different material M2 in the base material filling step S12. Retract with respect to the mold 120, open the frame-shaped core 113 and move it to the integrated position, and the base material part molding part 141 and the dissimilar material part molding part 142 are separated from each other to shift to a state where they are integrated.
- the different material pressing step S15 is performed.
- the second pressure is continuously applied to the different material M2 while maintaining the state where the first pressure force is applied to the base material M1.
- the base material M1 and the different material M2 enter and expand into the space of the cavity 140 where the frame-shaped core 113 was present, and the base material M1 and the different material M2 come into contact with each other and are mixed. And the part which has contact
- the dissimilar material M2 to which the large second pressure is applied in the central portion where the solidification is slow is applied only to the first pressure smaller than this, and pushes away the base material M1 that has not yet solidified.
- the central part protrudes.
- the entering portion 33 of the different material M2 into the base material M1 is interrupted at a number of places, so that it becomes a petal shape. .
- each entering portion 33 is represented as the same shape having the same size. However, in actuality, the size and shape of the entering portion 33 are different depending on the part, and in some cases, on one side of the different material portion 30. In some cases, the tip of the entry portion 33 may be curved or linear.
- the base material M1 and the dissimilar material M2 are cooled, and solidify while the dissimilar material M2 enters the base material M1 at the portion where the tip of the frame-shaped core 113 is retracted.
- the mold opening process S17 is performed.
- the lower mold 120 is moved backward relative to the upper mold 110 to perform mold opening.
- the instrument panel 10 comprised by the base material part 20 and the different material part 30 is removed from the injection mold 100.
- a convex part (not shown) for forming the fragile part 31 in the dissimilar material part 30 protrudes from the lower mold 120 toward the inside of the dissimilar material part forming part 142.
- the weak part 31 is formed in the dissimilar material part 30 by the part.
- the protrusions 131 of the core 130 are located over the entire circumference in the cavity 140 at the inner part of the outer peripheral part of the dissimilar material part forming part 142, the protrusions 131 form the external shape of the protrusions 131.
- a plurality of copied through holes are formed in the different material portion 30.
- the instrument panel 10 is further cooled after being removed from the injection mold 100, but at this time, the shape is not defined by the injection mold 100.
- the heat shrinkage rate of the dissimilar material M2 is larger than the heat shrinkage rate of the base material M1
- the extent to which the dissimilar material portion 30 shrinks by cooling after being removed from the injection mold 100 is the extent to which the base material portion 20 shrinks. Bigger than.
- the dissimilar material part 30 is surrounded by the base material part 20, a shrinkage
- the entry portion 33 of the different material M2 into the base material M1 is interrupted at a number of places, which is a petal shape. Therefore, it is possible to improve the bonding strength between the base material portion 20 and the dissimilar material portion 30.
- the base material part 20 and the different material part 30 contract due to cooling, It can absorb by deform
- the above-described through hole 32 of the dissimilar material part 30 is obtained by crushing and deforming the through hole of the dissimilar material part 30 before cooling.
- each through-hole of the dissimilar material part 30 is V-shaped, and as a result of experiments conducted by the inventor, it has been found that the deformation is effectively absorbed as compared with other shapes such as a straight shape and a circular shape. It was.
- the base material part 20 and the dissimilar material part 30 can be integrally molded by the cavity 140 formed by one injection mold 100. Therefore, since the step of molding the different material portion 30 in advance using a separate injection mold is not required, the instrument panel 10 can be molded with a small number of steps with high work efficiency.
- the dissimilar material forming part 142 is partitioned in the cavity 140 using the frame-shaped core 113, it is possible to suppress the dissimilar material M2 from flowing more than necessary in the cavity 140 and suppressing the consumption of the dissimilar material M2 from becoming excessive. it can.
- the frame-shaped core 113 is retracted, and the base material part molding part 141 and the different material part molding part 142 Since the dissimilar material M2 can enter the base material M1 by communicating, the base material part 20 and the dissimilar material part 30 can be firmly joined. Furthermore, the shrinkage
- the entering portion 33 has been described with respect to the case where the different material portion 30 has entered the base material portion 20.
- the entering portion 33 may be one in which the base material portion 20 enters toward the dissimilar material portion 30.
- the protrusion 131 formed on the core 130 is not limited to this, and may have a shape such that the shape is formed in the through hole 32 formed in the different material portion 30 described above.
- the discontinuous portion formed in the dissimilar material portion 30 is not limited to the through hole 32 or the bottomed hole.
- the discontinuous portion may be in a form in which the side wall portions of the through hole or the bottomed hole are in contact with each other, and may be a cut or the like.
- a bottomed hole may be formed instead of the through hole 32 formed in the dissimilar material portion 30 as described above, and in this case, the protrusion formed on the core 130 is in the clamped state in the upper mold 110. What is necessary is just to have a clearance gap between the lower surface or the upper surface of the lower mold
- the thermal contraction rate of the different material M2 was larger than the thermal contraction rate of the base material M1 was demonstrated.
- the present invention is not limited to this.
- the thermal contraction rate of the different material M2 may be smaller than the thermal contraction rate of the base material M1.
- the base material part 20 and the different material part 30 shrink
- difference differences can be absorbed by deform
- the base material M1 and the dissimilar material M2 may have the same heat shrinkage rate, and the resin material may simply differ in color or the like.
- the base material part 20 and the different material part 30 were joined so that the base material part 20 might surround the different material part 30 over the perimeter was demonstrated.
- the present invention is not limited to this, and the base material portion 20 may be joined so as to surround the dissimilar material portion 30 at least partially.
- contraction difference produced at the time of cooling can be absorbed by a discontinuous part.
- the present invention may be a case where the base material portion 20 and the dissimilar material portion 30 are joined at least on one side. Also in this case, the dissimilar material part 30 is restrained by the base material part 20 in one side joined, and a shrinkage difference occurs along this side at the time of cooling, but this shrinkage difference can be absorbed by the discontinuous part.
- the resin part is the instrument panel 10
- the resin product according to the present invention is not limited to the instrument panel 10 as long as the base material portion made of the base material M1 and the different material portion made of the different material M2 are joined.
- 10 instrument panel (resin part), 20 ... base material part (first resin part), 21 ... opening, 30 ... dissimilar material part (second resin part), 31 ... weak part, 32 ... through hole (discontinuous part) ), 33 ... Intrusion part, 41 ... Protrusion, 100 ... Injection mold, 110 ... Upper mold, 111 ... Dissimilar material supply nozzle (second supply nozzle), 112 ... Base material supply nozzle (first supply nozzle), 113 ... Frame-shaped core, 120 ... lower mold, 131 ... projection, 130 ... core, 140 ... cavity, 141 ... base material part molding part (first resin part molding part), 142 ... dissimilar material part molding part (second resin part molding) Part), M1 ... base material (first resin material), M2 ... different material (second resin material).
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Instrument Panels (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
Abstract
Description
することができる。さらに、基材M1と異材M2とは、熱収縮率が同じであり、樹脂材料が単に色などが相違するだけであってもよい。
Claims (4)
- 第1の樹脂材料からなる第1樹脂部と第2の樹脂材料からなる第2樹脂部とが接合されている樹脂部品であって、
前記第1樹脂部と前記第2樹脂部との何れか一方が他方に向って入り込み、該入り込み部は複数の断続した凹部を有していることを特徴とする樹脂部品。 - 前記入り込み部は、該入り込み方向と直交する方向に沿って、前記複数の断続した凹部が配置されていることを特徴とする請求項1に記載の樹脂部品。
- 第1の樹脂材料からなる第1樹脂部と第2の樹脂材料からなる第2樹脂部とが接合されている樹脂部品の成形方法であって、
成形後の前記樹脂部品の前記第1樹脂部が成形される第1成形部と成形後の前記樹脂部品の前記第2樹脂部が成形される第2成形部との境界部位に複数の突起が配置されているキャビティに対して、前記第1成形部に前記第1の樹脂材料を供給すると共に、前記第2成形部に前記第2の樹脂材料を、前記第1の樹脂材料の供給圧力とは異なる供給圧力で供給することを特徴とする樹脂部品の成形方法。 - 第1の樹脂材料からなる第1樹脂部と第2の樹脂材料からなる第2樹脂部とが接合されている樹脂部品の成形装置であって、
成形後の前記樹脂部品の前記第1樹脂部が成形される第1成形部と成形後の前記樹脂部品の前記第2樹脂部が成形される第2成形部との境界部位に複数の突起が配置されているキャビティと、
前記第1成形部に前記第1の樹脂材料を供給する第1供給ノズルと、
前記第2成形部に前記第2の樹脂材料を供給する第2供給ノズルと、
前記第2の樹脂材料を、前記第1の樹脂材料の供給圧力とは異なる供給圧力で供給する制御手段とを備えたことを特徴とする樹脂部品の成形装置。
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US16/337,683 US10919390B2 (en) | 2016-09-30 | 2017-09-20 | Resin component, and molding method and molding device for same |
GB1906056.5A GB2569928A (en) | 2016-09-30 | 2017-09-20 | Resin component, and molding method and molding device for same |
CA3038241A CA3038241C (en) | 2016-09-30 | 2017-09-20 | Resin component, and molding method and molding device for same |
CN201780059968.3A CN109789784B (zh) | 2016-09-30 | 2017-09-20 | 树脂部件及其成形方法、成形装置 |
MYPI2019001686A MY183692A (en) | 2016-09-30 | 2017-09-20 | Resin component, and molding method and molding device for same |
BR112019004206A BR112019004206A2 (pt) | 2016-09-30 | 2017-09-20 | componente de resina, e método de moldagem e dispositivo de moldagem para o mesmo |
MX2019003504A MX2019003504A (es) | 2016-09-30 | 2017-09-20 | Componente de resina, metodo y dispositivo de su moldeo. |
JP2018542446A JP6738902B2 (ja) | 2016-09-30 | 2017-09-20 | 樹脂部品及びその成形方法、成形装置 |
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US20200031229A1 (en) | 2020-01-30 |
MY183692A (en) | 2021-03-08 |
US10919390B2 (en) | 2021-02-16 |
CA3038241C (en) | 2021-11-09 |
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GB2569928A (en) | 2019-07-03 |
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