JP4310790B2 - Manufacturing method for interior parts for automobiles - Google Patents

Description

The present invention is a door trim relates rear parcel shelf, floor trim, a luggage trim, trunk trim, a rear side trim, a method of manufacturing automobile interior parts such as the roof trim, in particular, excellent in appearance as well as the strength of the outer peripheral end portion, moreover, easy and a method for manufacturing of automotive interior parts that can be manufactured at low cost.

  For example, the configuration of automobile interior parts will be described with reference to FIGS. The door trim 1 has a shape retaining property and attachment rigidity to the door panel, and is configured by laminating and integrating a skin 3 excellent in surface appearance on the surface of the resin core material 2 that extends over almost the entire product surface. . The resin core material 2 is made of a polypropylene resin mixed with talc, and the skin 3 does not have shape retention itself, and the back surface of the synthetic resin sheet such as a vinyl chloride sheet is made of polyethylene foam or the like. A laminated sheet material in which a cushion material is laminated is used, and recently, an elastomer sheet such as a thermoplastic olefin (hereinafter referred to as TPO) sheet tends to be frequently used in consideration of environmental aspects and recycling aspects.

  Next, a conventional example of the method for forming the door trim 1 will be described with reference to FIG. First, a molding die 4 that molds the door trim 1 is connected to a molding upper die 5 that can move up and down by a predetermined stroke, a molding lower die 6 that forms a pair with the molding upper die 5, and a molding lower die 6. It is generally composed of the injection machine 7. When the upper and lower molds 5 and 6 are clamped, a cavity portion 5a is formed in the molded upper mold 5 and a core section 6a is provided in the molded lower mold 6 in order to shape the product shape of the door trim 1. Yes. In order to move the molding upper die 5 up and down by a predetermined stroke, an elevating cylinder 5b is connected, and the molding lower die 6 is provided with a manifold 6b and a gate 6c that serve as a passage of molten resin from the injection machine 7. Further, in order to maintain an appropriate posture, the upper molding die 5 that moves up and down is provided with guide posts 6d at the four corners of the lower molding die 6, and the molding upper die 5 has guides corresponding to the guide posts 6d. A bush 5c is provided.

  Therefore, when the molding upper and lower molds 5 and 6 are in the mold open state, either the skin 3 is set in the mold, and then either immediately before or after the molding upper and lower molds 5 and 6 are clamped The molten resin M is injected and filled from the injection machine 7 through the manifold 6b and the gate 6c into the product cavity between the molds at the timing, thereby forming the resin core material 2 into a required curved shape and the resin core material 2 The skin 3 is integrally formed on the surface (for example, see Patent Document 1). In FIG. 30, for convenience of explanation, the molten resin M is supplied to the mold surface of the core portion 6 a in an open state, but actually, the molten resin M is injected into the cavity after the mold upper and lower molds 5 and 6 are clamped. It may be filled.

  Further, regarding the processing of the outer peripheral terminal of the product of the door trim 1, as shown in FIG. 31, after the outer skin 3 is simultaneously press-molded on the surface of the core material 2, the core material 2 and the outer skin 3 are formed by the mold blade in the mold. The piercing cut process is performed in a separate process after the piercing cut process or molding. Further, as shown in FIG. 32, after the core material 2 is press-molded, the skin 3 is integrated by vacuum pressing, press-bonding, etc. in a separate process, and then the terminal 3 a of the skin 3 is wound around the back surface side of the core material 2. Processing is also conventionally performed.

Japanese Patent Laid-Open No. 10-138268 (Page 2, FIGS. 3 and 4)

  However, in the conventional door trim 1, since the projected area of the resin core material 2 is large, there are problems that the material cost is high and the product is heavy. In addition, since the projected area of the resin core material 2 is large, it is necessary to set the injection pressure at the time of molding high, and a mold structure that can withstand the high injection pressure is required, and the production cost of the mold is increased, In addition, since a large amount of molten resin is cooled and solidified, the molding cycle becomes longer, which is a major factor for reducing productivity.

  Further, as shown in FIG. 31, the outer peripheral edge of the door trim 1 has a drawback that when the outer skin simultaneous press molding is performed, the outer peripheral terminal processing is difficult, the appearance is not good, and the appearance performance is deteriorated. As shown in FIG. 3, the method of winding the skin 3 in a separate process requires a large number of man-hours and inevitably increases costs.

The present invention has such has been made in view of the circumstances, can promote weight reduction, a manufacturing method of an automotive interior component attained costs with high rigidity, it is possible to reduce the molding die cost, molding cycle also together can be shortened, in particular, to increase the appearance and rigidity of the product outer peripheral end portion, and an object thereof is to provide a method for producing interior components for automobiles with improved appearance performance.

  As a result of earnest research, the present inventors have given the function as a core material by imparting shape retention to the foamed resin sheet that has been used conventionally as the skin, and more. Resin with excellent rigidity at locations where high rigidity is required, i.e. it can be intimately contacted with the peripheral part of the product, the panel, the mating part with the mating part, or where a certain clearance is secured, or where the part is attached and where the load is applied The ribs are arranged and the other parts are hollowed out to reduce the weight compared to the conventional resin core material with a large projected area. It is found that the terminal treatment can be achieved easily and beautifully by softening and melting the entrained superposed part along the heating with a heating jig and simultaneously forming the thin hinge part, and the present invention is completed. It came to that.

That is, an automotive interior part according to the present invention is formed from a foamed resin base material that is molded into a required shape and has shape retention, and a resin rib having a predetermined pattern shape laminated and integrated on the back surface of the foamed resin base material. In the manufacturing method of interior parts for automobiles, wherein the laminated structure is adopted in whole or in part, the laminated structure is a molding die after heat-softening treatment of the foamed resin sheet which is the material of the foamed resin base material After being set inside, the molds are clamped together to form the foamed resin base material into the required shape along the cavity shape of the mold, and the lower mold is matched with the pattern shape of the resin rib. The molten resin is injected and filled into the groove formed on the mold surface from the injection machine, and the resin rib is laminated and integrated on the back side of the foamed resin base material. Laminated structure from mold After molding and setting on the receiving jig, a heating jig is brought close to or in contact with the back surface side of the foamed resin base material at the edge of the laminated structure, and the foamed resin base material on the inner side of the winding silo is placed. After the heat softening treatment, a thin hinge is formed at the folding base of the winding white by the projection of the heating jig, and then the winding piece is arranged so as to be able to advance and retract and move up and down by the advancing and retreating cylinder and the table driving cylinder. Use the winding mechanism to position the winding piece below the horizontal positioning roll, and then drive the table drive cylinder to raise the winding block and heat the back of the winding block. By raising the winding white so that it contacts the side of the jig, the heating white is heated and softened, and then the heating jig is withdrawn upward, Progress By driving the use cylinder, the entrainment frame slide operation, is produced by two steps of the terminal treatment process of the laminated structure to be processed winding to the back surface of the white entrainment based on thin hinge portions foamed resin base material It is characterized by that.

  Here, the automobile interior parts can be applied to door trims, rear parcel shelves, floor trims, luggage trims, trunk trims, rear side trims, roof trims, and the like. In addition, when the foamed resin base material constituting a part of the laminated structure is close to a flat shape, the heat softening step is omitted and a desired shape is formed by a mold, but this is applied to a three-dimensional product. In this case, after the foamed resin sheet is heat-softened, the foamed resin sheet is molded into a required curved shape in a molding die, and the shape is maintained. Here, “shape retention” refers to having rigidity enough to retain the shape when the mold is removed after molding, even without a reinforcing material such as a rib. Also, if the product shape includes a high expansion ratio part, after the foamed resin sheet is heat-softened, a vacuum suction mechanism is provided in the molding die and the foamed resin sheet is vacuumed along the inner surface of the molding die. A suction force may be applied.

  As the foamed resin sheet, a material obtained by adding a foaming agent to a thermoplastic resin is used. The thermoplastic resin may be one type of thermoplastic resin or two or more types of thermoplastic resins. Preferably, polyethylene resin, polypropylene resin, polystyrene resin, polyethylene terephthalate resin, polyvinyl alcohol resin, vinyl chloride resin, ionomer resin, polyamide resin, acrylonitrile / butadiene / styrene (ABS) resin, polycarbonate resin Resins can be used. As the foaming agent, an organic foaming agent such as an azo compound, a sulfohydrazide compound, a nitroso compound or an azide compound, or an inorganic foaming agent such as sodium bicarbonate can be used. The foamed resin base material obtained by molding the foamed resin sheet into a required shape after heat softening treatment preferably has a foaming ratio of 2 to 10 times in consideration of the balance between the weight and strength of the product. The cell diameter of the foamed resin base material at that time is preferably in the range of 0.1 μm to 2.0 mm, and the thickness is 0.5 to 30 mm, preferably 1 to 10 mm.

  On the other hand, the thermoplastic resin material used as the resin rib can be appropriately selected from a wide range of thermoplastic resins. Generally, polyethylene resin, polypropylene resin, polystyrene resin, polyethylene terephthalate resin, polyvinyl alcohol resin, vinyl chloride resin, ionomer resin, polyamide resin, acrylonitrile / butadiene / styrene (ABS) can be preferably used. Resin, polycarbonate resin and the like can be used. Moreover, you may mix various fillers in these thermoplastic resins. Examples of the filler that can be used include inorganic fibers such as glass fiber and carbon fiber, and inorganic particles such as talc, clay, silica, and calcium carbonate. Moreover, various additives, such as antioxidant, a ultraviolet absorber, a coloring agent, a flame retardant, and a low shrinkage agent, may be mix | blended.

  And in order to improve an external appearance design property, you may laminate | stack and integrate a decorating material on the surface of a foamed resin base material. As this decorating material, a TPO sheet, a thermoplastic plastic urethane (hereinafter referred to as TPU) sheet, a synthetic resin sheet such as a vinyl chloride sheet, a fabric sheet such as a woven fabric, a nonwoven fabric, a knitted fabric, or a film, a foam, a net-like material, etc. Can be used in the form of a single sheet, or in the form of a laminated sheet material in which a back surface of a synthetic resin sheet or a fabric sheet is lined with a cushion layer such as polyethylene foam, polypropylene foam or polyurethane foam. Although the material which comprises these decorating materials is not specifically limited, It is more preferable to use the raw material which has air permeability, such as a woven fabric, a nonwoven fabric, and a knitted fabric, in order to utilize the sound absorption performance of a foamed resin base material.

  In addition, the porous sound-absorbing function of the foamed resin base material provides interior parts with excellent sound-absorbing performance. When polyolefin resin is used as the material for the foamed resin base material and resin ribs, Since it is unified, the separation process can be abolished and the recycling work can be simplified. Furthermore, the rib thickness of the resin rib can be varied as appropriate, for example, by setting the rib thickness to be thicker at sites where a large external force is applied to the product, and by reducing the rib thickness at sites where external force is relatively difficult to apply. Can do. Therefore, it is sufficient to use the minimum necessary amount of resin material, which can contribute to weight reduction and cost reduction of the product. Moreover, the clip seat or the attachment seat for attaching various escutcheon parts can also be integrally formed in the resin rib.

And according to the interior parts for automobiles manufactured by the method of the present invention, the laminated structure adopted for the whole or a part of the interior parts enhances the rigidity on the back side of the foamed resin base material having shape retention. In this sense, since the resin ribs are laminated and integrated, the conventional resin core material can be eliminated. Therefore, by eliminating the conventional resin core material having a very large projected area, the weight of the product can be reduced and the resin material can be saved, so that the material cost can be reduced at the same time. Furthermore, with respect to the outer peripheral edge of the laminated structure, since the winding portion of the outer portion of the thin hinge portion is used as the folding base point, the cut end is not conspicuous to the outside, and the appearance design is excellent. In the terminal portion, the foamed resin base material has a double structure, and the rigidity can be enhanced.

Here, the molding die used in the method of the present invention is connected to a molding upper mold that can move up and down by a predetermined stroke, a molding lower mold that is a fixed side located below the molding upper mold, and a molding lower mold. It consists of an injection machine. The molten resin supplied from the injection machine is supplied to the mold surface of the molded lower mold through a resin passage such as a manifold and a gate provided in the molded lower mold, and more specifically, into a groove formed on the mold surface of the molded lower mold. Is done. Incidentally, the upper die is lowered to the bottom dead center, after clamping the molding upper and lower dies, injecting and filling the groove provided on the mold surface of the molding lower die a molten resin at a predetermined injection pressure.

  Accordingly, the foamed resin sheet is formed into a desired curved surface shape along the mold surface shape of the molding die by clamping the upper and lower molds, and further, the foamed resin base material is injected and filled with molten resin. A resin rib is laminated and integrated on the back surface of the substrate. At this time, after performing the heat softening process with a heater or the like in the previous step, the foamed resin sheet is set in a molding die. And simultaneously with shaping | molding of a foamed resin base material, what is necessary is just to laminate and integrate the resin rib on the back surface of a foamed resin base material. In the case where the final product shape has a high development rate portion, it is preferable to perform mold clamping of the molding die a plurality of times and perform injection filling of the molten resin in the final mold clamping process. In addition, if the product shape includes a portion with a higher development ratio, a vacuum suction mechanism is provided in the molding upper mold, and the foamed resin base material is molded into the required shape by the vacuum suction force along the mold surface of the molding upper mold. Good to do.

  Therefore, according to the method of the present invention, since only the resin rib is molded as compared with the conventional resin core material having a large projected area, the injection pressure can be set lower than the conventional one, so that the load on the molding die can be reduced. At the same time, the amount of resin is small, material costs can be saved, and the cooling time is shorter than that of conventional resin cores, so that the product molding cycle can be shortened.

  Next, as a terminal processing device used for terminal processing of the laminated structure, the receiving jig for setting the laminated structure after molding and the back side of the foamed resin base material at the edge of the laminated structure are softened by heating. And a heating jig for forming a thin hinge portion serving as a hinge base point, and a winding mechanism portion for folding a winding sill on the edge of the laminated structure to the back side of the foamed resin base body. The receiving jig includes a set base for setting the laminated structure, a spacer for fixing the laminated structure set on the set base, and a receiving jig holder. As the heating jig, a block-like or plate-like hot blade is used, and a cylinder for driving the hot blade up and down is provided. In addition, in order to form the thin hinge part used as a hinge base point in a foamed resin base material, the sharp protrusion is provided. In the case of a block-shaped hot blade, this protrusion is provided at the corner portion along the outer edge of the lower surface, or in the case of a plurality of plate-shaped hot blades, on the lower edge of the plate-shaped hot blade. It has been. Further, as the winding mechanism portion, a winding piece is connected to a slider, and this slider is driven forward / backward by the forward / backward cylinder in the winding direction of the winding white, and a table for supporting the forward / backward cylinder and the slider is provided. It is driven in the vertical direction by a table driving cylinder. A guide mechanism is provided between the slider and the table.

  Next, as the terminal processing step of the laminated structure, the laminated structure is taken out from the molding die, set on the set stand and fixed by the holding jig holder, and then the heating jig is moved up and down the cylinder to move the laminated structure. In contact with or in close proximity to the back surface side of the end edge portion, the portion where the winding scissors are folded back is heated and melted, and a thin hinge portion is formed at a portion serving as a folding base point of the scissors scissors. Thereafter, when the table driving cylinder of the winding mechanism is operated, the winding piece rises integrally with the slider. Then, the wrapping white is raised along the outer surface of the heating jig. At this time, the back surface of the winding white is softened and melted by the side surface of the heating jig. Thereafter, the advancing / retreating cylinder operates so as to fold the winding sill, the wrapping sill is folded by the winding piece, and the welding is integrated.

  Therefore, since the terminal processing part of the laminated structure has a double structure in which a winding scissor is wound, the rigidity can be enhanced, there is no fear of deformation, the cut end or the like is not exposed, and the appearance is also preferable. In addition, there is no need for a separate adhesive application process, drying process, etc., and after the heat softening treatment of the foamed resin base material, when the heat softened part is cooled and solidified, the wrapping white is integrated, so an adhesive-less structure Therefore, the man-hours for terminal processing can be simplified.

Next, in another embodiment in the terminal processing step of the laminated structure according to the present invention, when the back surface side of the foamed resin base material is heat-softened with a heating jig in the terminal processing step of the laminated structure. by pressing pressure from the heating jig entrainment white and a portion which the winding white polymerization by flattened compressed into thin-wall, other parts of the thickness of the laminated structure of the terminal processing unit in the laminated structure It is characterized by being set to be thinner than the thickness.

  And according to this embodiment, since the thickness of the part where the entrainment scissors and the entrainment scissors are polymerized in the edge part of the laminated structure is set to be thin, the foamed resin base material of the edge part By increasing the density, the rigidity can be further strengthened, and since the thickness is thin, problems such as interference with the counterpart component can be effectively avoided.

Furthermore, in another preferable embodiment in the terminal processing step of the laminated structure according to the present invention, in the terminal processing step of the laminated structure, a jagged blade is formed at a corner portion of the heating jig, and the heating jig is used. After heat-softening the back surface of the foamed resin base material, by driving the table driving cylinder, the winding piece is raised and the winding wire is raised along the side surface of the heating jig and heated and softened, and then heated. Raise the jig, peel off the foaming resin base material of the entrainment white with this serrated blade, make the entrainment thickness thinner , then retract the heating jig upward, and then drive the advance / retreat cylinder The winding piece is slid, and the thin-walled winding sheet that is in an upright state is folded back and fixed by welding.

  And according to this embodiment, when raising the heating jig after raising the winding white of the laminated structure by the raising operation of the winding piece, the sharp cutting edge provided at the corner portion of the heating jig is By removing the foamed resin base material from the winding paper with the serrated blade, the thickness of the winding paper can be reduced, and the winding work can be performed more easily.

  As described above, according to the present invention, the laminated structure constituting the whole or a part of the automobile interior part is a lightweight and shape-retaining foamed resin base material, and the back surface of the foamed resin base material. In addition, because it is made up of resin ribs that are laminated and integrated in areas where rigidity is required, such as the outer periphery of the product, the conventional heavy resin core material can be abolished. Since it is a porous material, it has the effect that the interior component for motor vehicles excellent in the sound absorption performance can be provided.

  Furthermore, according to the present invention, if the step of molding the foamed resin base material into the required shape along the cavity shape of the molding die and simultaneously molding the resin rib on the back surface side of the foamed resin base material is adopted, Since the projected area of the resin rib, which is a molded product, is small, compared to conventional resin core materials, the load applied to the molding die is less, the cooling time can be shortened, and the yield can be increased, thus increasing the work efficiency. In addition, there is an effect that the cost can be greatly reduced.

  In addition, according to the present invention, the back surface side of the outer peripheral edge of the laminated structure is heat-softened by the heating jig, and the thin hinge portion serving as the folding base of the winding white is formed at the same time, so that the winding white is easy. In addition to being able to form a sharp outer circumference line and being excellent in appearance design, the terminal part has a double structure that is folded back and the rigidity is reinforced. In addition, there are various effects such as that the occurrence of undulation failure or the like does not occur, and the alignment accuracy with respect to the panel or the adjacent counterpart component can be increased.

Hereinafter, preferred embodiments of the method for manufacturing the automotive interior component according to the present invention, will be exemplified a door trim and a manufacturing method thereof for automobiles.

  FIG. 1 to FIG. 13 show a first embodiment of the present invention, FIG. 1 is a front view showing a two-tone type automobile door trim, FIG. 2 is a sectional view showing the configuration of the automobile door trim, and FIG. 4 is a front view showing a resin rib and a door trim lower of a door trim upper in a door trim, FIG. 4 is a cross-sectional view showing a configuration of a terminal processing portion of the door trim upper in the door trim for an automobile, and FIGS. FIG. 7 is an explanatory diagram showing the configuration of a terminal processing apparatus used for terminal processing of the door trim upper, FIGS. 8 to 10 are explanatory diagrams showing terminal processing steps in the door trim upper, and FIG. 11 is a terminal. FIG. 12 and FIG. 13 are explanatory diagrams showing modifications of the terminal processing method.

  1 and 2, a two-tone type automobile door trim 10 is composed of an upper and lower divided body of a door trim upper 20 made of a laminated structure and a door trim lower 30 made of a single resin product. As functional components to be mounted on the door trim 10, an inside handle escutcheon 11 and a power window switch escutcheon 12 are attached to the door trim upper 20. The door trim lower 30 is provided with a door pocket opening 13, and on the back side thereof, as shown in FIG. 2, a pocket back cover (made of a resin molded body) 14 is attached. On the side, the speaker grill 15 is formed integrally with or separately from the door trim lower 30.

By the way, the automotive door trim 10 manufactured by the method of the present invention is applied to the structure of the door trim upper 20 which is a laminated structure, thereby reducing the weight of the product and improving the appearance of the outer peripheral terminal portion. It is characterized by simplifying the process and terminal processing process. That is, as shown in FIG. 2, the door trim upper 20 is molded into a desired curved surface shape and has a foamed resin base material 21 having shape retention, and a resin laminated and integrated on the back surface side of the foamed resin base material 21. The rib 22 and the decorating material 23 having a decorating function laminated and integrated on the surface side of the foamed resin base material 21 are roughly configured. In the figure, reference numeral 16 denotes a door panel.

  The foamed resin substrate 21 is heat-molded into a required shape after heat-softening the foamed resin sheet so as to have shape retention, for example, cold press-molded with a molding die having a desired mold surface. About the high expansion | deployment rate part, you may shape the foaming resin base material 21 by vacuum forming. The foamed resin sheet has a structure in which a foaming agent is added to a general-purpose thermoplastic resin. The thermoplastic resin includes a polyethylene resin, a polypropylene resin, a polystyrene resin, a polyethylene terephthalate resin, a polyvinyl alcohol resin, a chloride resin. Vinyl resin, ionomer resin, polyamide resin, acrylonitrile / butadiene / styrene (ABS) resin, polycarbonate resin, etc. can be used. As foaming agents, organic foaming agents such as azodicarbonamide and inorganic substances such as sodium bicarbonate can be used. A blowing agent can be used. In this embodiment, a foamed resin sheet in which sodium bicarbonate is appropriately added as a foaming agent to a polypropylene resin is used. The expansion ratio of the foamed resin base material 21 is set to 2 to 10 times, and the thickness is set to a range of 0.5 to 30 mm, particularly 1 to 10 mm.

  Next, the resin ribs 22 are disposed on the back side of the foamed resin base material 21, and in particular, as shown in FIG. 3, are set in a predetermined pattern extending in an intersecting manner, and are terminals along the outer peripheral edge of the door trim upper 20. In the (winding portion), there is a portion where the resin rib 22 is not provided. In addition, as for this pattern, arbitrary patterns may be selected as long as it is intersecting, such as a vertical and horizontal direction, an oblique direction, or a combination thereof. The resin rib 22 is made of a general-purpose synthetic resin molded body, and as a synthetic resin that can be preferably used normally, a polyethylene resin, a polypropylene resin, a polystyrene resin, a polyethylene terephthalate resin, a polyvinyl alcohol resin, a vinyl chloride resin, An ionomer resin, a polyamide resin, an acrylonitrile / butadiene / styrene (ABS) resin, a polycarbonate resin, or the like may be selected as appropriate. In this embodiment, a polypropylene resin is used in consideration of environmental and recycling aspects. Yes. The resin rib 22 is appropriately mixed with a filler such as inorganic fibers such as glass fiber and carbon fiber, and inorganic particles such as talc, clay, silica and calcium carbonate in the thermoplastic resin. May be.

  As described above, the door trim 10 shown in FIGS. 1 to 3 includes the door trim upper 20 made of a laminated structure and the door trim lower 30 made of a single synthetic resin, and has excellent appearance design due to the accent effect on the appearance. It has. Further, the door trim upper 20 includes a foamed resin base material 21 having shape retention, a resin rib 22 laminated and integrated on the back surface of the foamed resin base material 21, and a decorating material 23 having a decorating property. Therefore, the weight of the resin core material occupied over the entire circumference of the product as in the past can be eliminated and the lightweight foamed resin base material 21 is used. In addition, the weight can be reduced by 40% or more, the resin material can be saved significantly, and the cost can be reduced.

  Furthermore, since the foamed resin base material 21 has a porous structure, the door trim upper 20 is excellent in sound absorption performance and can reduce noise in the vehicle interior. Moreover, in order to maintain the sound absorption of the foamed resin base material 21, the decorative material 23 laminated in advance on the surface of the foamed resin base material 21 or integrated and laminated at the time of molding is a woven fabric. A fabric sheet having air permeability such as a nonwoven fabric or a knitted fabric is preferred. The decorative material 23 may be a single sheet such as a synthetic resin sheet such as a vinyl chloride sheet, a TPO sheet, or a TPU sheet, a synthetic resin film, a foam, or a net-like body, in addition to a fabric sheet such as a woven fabric, a nonwoven fabric, or a knitted fabric. Can be used. Moreover, the laminated sheet material which backed cushion layers, such as a polyethylene foam, a polypropylene foam, a polyurethane foam, can be used for the back surface of a synthetic resin sheet or a fabric sheet. In addition, when a TPO sheet is used, since it can unify with an olefin resin material, it is advantageous in terms of recycling.

  Next, the terminal structure along the outer peripheral edge of the door trim upper 20 in the door trim 10 will be described with reference to FIG. That is, as described above, the door trim upper 20 is integrated with the resin ribs 22 that reinforce the rigidity on the back surface of the lightweight foamed resin base material 21 having shape retention, and on the surface of the foamed resin base material 21. The decorative material 23 having a decorative property is laminated and integrated. Further, a vertical wall flange portion 211 extends downward (door panel 16) along the product outer periphery of the door trim upper 20, and the distal end portion of the vertical wall flange portion 211 is connected to the door panel 16. An extension part 212 extends horizontally in parallel, and the extension part 212 is wound around the thin hinge part 24 and the white 25 is wound and fixed to the foamed resin base material 21 side of the extension part 212. The terminal processing unit A is in contact with the door panel 16 in a face-contact state.

  Therefore, in the terminal processing part A of the door trim upper 20, the cut end is not exposed, and the winding scissors 25 are folded and fixed to the back surface side of the extension part 212. Particularly, since the thin hinge portion 24 corresponds to the outer peripheral line of the door trim upper 20, a sharp outer peripheral line of the product can be secured, the appearance is excellent, and the winding 25 is folded and fixed to the back surface of the extension portion 212. Therefore, there is an advantage that the rigidity of the terminal portion can be strengthened, there is no fear of undulating deformation, and the door panel 16 can be closely adhered to the door panel 16 and the alignment accuracy can be increased. Further, even when the mating shape is provided with a certain clearance with the counterpart part, the mating accuracy can be increased.

  Next, the outline | summary of the manufacturing method of the door trim 10 including the terminal processing process of the outer periphery terminal part of the door trim upper 20 is demonstrated below. First, the molding process of the door trim 10 will be described with reference to FIGS. As shown in FIG. 5, a molding die 40 used for molding the door trim 10 includes a molding upper die 41 that can move up and down by a predetermined stroke, a fixed molding lower die 42 that forms a pair with the molding upper die 41, and molding. This is mainly composed of two injection machines 43 a and 43 b connected to the lower mold 42. More specifically, the molding upper die 41 has a cavity portion 411 that matches the product shape, and is driven up and down by a predetermined stroke by an elevating cylinder 412 connected to the upper surface of the molding upper die 41. In addition, guide bushes 413 serving as a guide mechanism are provided at the four corners of the molding upper die 41.

  On the other hand, the molding lower die 42 is provided with a core portion 421 corresponding to the cavity portion 411 of the molding upper die 41. In addition, manifolds 422a and 422b and gates 423a and 423b are provided to supply molten resin to the mold surface of the core portion 421, and the injection machine passes through the resin passages of the manifolds 422a and 422b and gates 423a and 423b. The molten resins M1 and M2 supplied from 43a and 43b are supplied into a groove 424 formed on the upper surface of the core 421 and into a cavity 425 for forming the door trim lower 30. In addition, guide posts 426 that serve as a guide mechanism protrude from the four corners of the molded lower mold 42, and the guide posts 426 guide into the guide bush 413 when the molded upper and lower molds 41 and 42 are clamped. As a result, the pressing posture of the molding upper die 41 can be properly maintained.

  Subsequently, each process of the manufacturing method of the door trim 10 mentioned above is demonstrated. First, what laminated the decorating material 23 on the one side of the foamed resin sheet S with a heater apparatus (not shown) is heat-softened to predetermined temperature. As this foamed resin sheet S, a polypropylene foam sheet (manufactured by Sumika Plustech, trade name: Sumiceller foam PP sheet, foaming magnification = 3 times, thickness 3 mm) is used in this embodiment. Subsequently, as shown in FIG. 5, the heat-softened foamed resin sheet S (with the decorative material 23 laminated) is formed between the cavity portion 411 of the molding upper mold 41 and the molding lower mold 42 at the location corresponding to the door trim upper 20. Set in the upper half of the cavity defined by the core part 421.

  Then, after setting the foamed resin sheet S, the molding upper die 41 is lowered by a predetermined stroke by driving the elevating cylinder 412 in the molding upper die 41, and the molding upper and lower dies 41, 42 are clamped as shown in FIG. Then, the foamed resin sheet S is shaped along a desired mold surface shape, and the foamed resin base material 21 is molded. Further, in order to form the resin rib 22 in the door trim upper 20 from the first injector 43a through the manifold 422a and the gate 423a, the molten resin M1 is injected and filled into the groove portion 424 of the core portion 421. Subsequently, in order to mold the door trim lower 30, the molten resin M2 is injected and filled into the door trim lower molding cavity 425 through the manifold 422b and the gate 423b from the second injection machine 43b, and the door trim lower 30 is molded into a required shape. Is done.

  Therefore, the resin ribs 22 in the door trim upper 20 are molded into a required shape by injecting and filling the molten resins M1 and M2 into the cavities from the first injection machine 43a and the second injection machine 43b, respectively. A door trim lower 30 is formed. As the molten resins M1 and M2, talc is mixed in an appropriate proportion with Sumitomo Noblen BUE81E6 (polypropylene manufactured by Sumitomo Chemical Co., Ltd., melt index = 65 g / 10 min). The injection timing of the molten resins M1 and M2 may be set before the mold upper and lower molds 41 and 42 are clamped. Thus, in order to manufacture the two-tone type door trim 10, two injection machines 43 a and 43 b are connected to the molding lower mold 42, and the molten resin M <b> 1 passes through each resin passage for the door trim upper 20 and the door trim lower 30. , M2 can be injection-filled to form the two-tone door trim 10 with a single mold 40 and a reduced number of processes.

  And in the manufacturing method of the door trim 10 mentioned above, especially the door trim upper 20 requires the terminal processing process mentioned later. In order to perform this terminal processing step, a terminal processing device 50 shown in FIG. 7 is used. The overall configuration of the terminal processing device 50 will be described with reference to the drawings. The terminal processing device 50 heats and softens the receiving jig 60 for setting the door trim upper 20 and the foamed resin base material 21 of the extended portion 212 corresponding to the edge side of the door trim upper 20 and forms the thin hinge portion 24. The heating jig 70 and a winding mechanism portion 80 that winds the winding scissors 25 around the back surface of the extension portion 212 are roughly configured.

  More specifically, the receiving jig 60 includes a set base 61 for setting the door trim upper 20, a spacer 62 for positioning and fixing the door trim upper 20 at a predetermined position, and a receiving jig presser 63. Further, as the heating jig 70, in the first embodiment, a block-shaped hot blade 71 is used, and a sharp projection 72 is formed along the outer edge of the lower surface of the hot blade 71. The hot blade 71 is a cylinder. A predetermined stroke up / down operation is performed by 73. A hot blade 71 is attached to the tip of the piston rod 73a of the cylinder 73, and the cylinder 73 is supported by a support base 73b. Further, in the winding mechanism unit 80, a winding piece 81 for winding the winding scissors 25 is connected to the slider 82, and the slider 82 is driven to advance and retreat by the advance / retreat cylinder 83. The slider 82 is driven to advance and retract along the guide rail 85 of the table 84 to which the advance / retreat cylinder 83 is attached. The table 84 is configured to be driven up and down by a predetermined stroke by a table driving cylinder 86.

  Next, the terminal processing step of the door trim upper 20 will be described using the terminal processing device 50 shown in FIG. First, as shown in FIG. 8, the door trim upper 20 is set on the set base 61 of the receiving jig 60, and fixed at a predetermined position by the spacer 62 and the receiving jig presser 63. Thereafter, the block-shaped hot blade 71 is lowered by driving of the cylinder 73, and as shown in the drawing, the block-shaped hot blade 71 is brought into contact with the foamed resin base material 21 of the extension portion 212 of the door trim upper 20 or confronted with a small clearance. The foamed resin base material 21 at this portion is softened by heating, and the thin hinge portion 24 is formed at the boundary portion with the winding white 25 by the sharp projections 72 provided at the lower surface corner portion of the hot blade 71. At this time, the temperature of the hot blade 71 needs to be 150 ° C. or higher. In this embodiment, the temperature is set to 180 ° C., and the foamed resin base material 21 and the hot blade 71 are brought into contact with each other for 10 seconds. 21 is heat-softened.

  After that, as shown in FIG. 9, the table driving cylinder 86 in the winding mechanism unit 80 operates to raise the table 84, and the winding piece 81 moves the winding white 25 in the door trim upper 20 to the outer surface of the hot blade 71. Stand along 71a. At this time, the heat-softening treatment is also performed on the foamed resin base material 21 on the back surface of the entraining white 25 by the heat transfer action from the hot blade 71. Thereafter, as shown in FIG. 10, the hot blade 71 is moved up to the standby position by the operation of the cylinder 73, and the advance / retreat cylinder 83 in the winding mechanism unit 80 is operated to advance the slider 82. The winding piece 81 is folded and integrated with the winding sheet 25 by folding the winding sheet 25 back to the back side of the extension 212. In this way, the terminal processing of the door trim upper 20 is performed. Accordingly, since no adhesive is used, it is advantageous in terms of man-hours, is preferable in terms of work environment, and as shown in FIG. 4, the terminal processing section A having excellent appearance and enhanced rigidity can be easily obtained. Can be formed.

  Next, FIGS. 11 to 13 show a modification of the first embodiment. The same parts as those of the above-described embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. As shown in FIG. 11, in this modified example, a plate-shaped hot blade 74 is used instead of the block-shaped hot blade 71 for the configuration of the heating jig 70. In this modified example, four sheets are used. Plate-shaped hot blades 74a to 74d are used. In particular, the outer plate-like hot blade 74a is longer than the other plate-like hot blades 74b to 74d, and a sharp projection 72 is formed at the tip. Each of the plate-like hot blades 74a to 74d is attached to the piston rod 73a of the cylinder 73 via a support body 74e.

  Then, as shown in FIG. 12, in the heat softening process by the heating jig 70, the hot blades 74 a to 74 d are in contact with or close to the foamed resin base material 21 of the extension portion 212. The foamed resin base material 21 is heated and softened, and in particular, the thin-walled hinge portion 24 serving as a boundary portion with the winding white 25 is formed by the outermost thermal blade 74a. Next, as shown in FIG. 13, when the table driving cylinder 86 of the winding mechanism unit 80 operates and the table 84 rises, the winding piece 81 is moved to the outer surface of the hot blade 74a by the winding piece 81. While standing up along, the back surface of the winding scissors 25 is heat-softened. The subsequent steps are the same as in the first embodiment described above, and after each of the hot blades 74a to 74d avoids upward, the winding piece 81 slides and the winding scissors 25 are folded and welded. And as an advantage of using these plate-shaped hot blades 74a-74d, compared with the block-shaped hot blade 71, while being heated with respect to a winding part equally, a heat-transfer effect is high. is there.

  As described above, in the first embodiment of the present invention, the block-shaped hot blade 71 or the plurality of plate-shaped hot blades 74 with respect to the foamed resin base material 21 on the back surface of the extension portion 212 in the door trim upper 20. At the same time as the heat softening treatment by the heating jig 70, etc., the thin hinge portion 24 for partitioning the winding scissors 25 is formed at the same time, and then the winding scissors 25 are raised and softened by the winding mechanism portion 80. Since the winding scissors 25 are simply wound on the back side of the extension part 212 by the sliding motion of the winding piece 81, the type using a conventional adhesive or the structure of cutting the terminal is used. Compared to products, no adhesive is required, the number of steps for applying and drying the adhesive can be shortened, the work environment can be maintained well, and the appearance is also excellent. And since it is a double core, there is an effect that the rigidity can be maintained firmly.

  In the first embodiment, the door trim upper 20 and the door trim lower 30 are integrally formed using the molding die 40, and then the terminal processing step is performed on the door trim upper 20 using the terminal processing device 50. However, after the door trim upper 20 and the door trim lower 30 are respectively formed by separate molds, and the terminal trim processing is performed on the door trim upper 20 using the terminal processing device 50, the door trim upper 20 and the door trim lower 30 are It is also possible to employ a step of joining and fixing. Further, after the winding piece 81 has turned the winding sill 25 back to the back side of the extension part 212, the table driving cylinder 86 is operated to lower the table 84, and the winding slab 25 is extended by the winding piece 81. By crushing to the 212 side, the rigidity of the terminal processing unit may be strengthened and the alignment with the door panel 16 may be improved.

  FIGS. 14 to 16 show a second embodiment of the present invention, which is applied to the terminal processing structure of the door trim upper 20 in the two-tone type automobile door trim 10 as in the first embodiment. FIG. 14 is an overall view of a terminal processing apparatus used in the second embodiment, and FIGS. 15 and 16 are explanatory views showing terminal processing steps of a door trim upper using the terminal processing apparatus. In the second embodiment, as shown in FIG. 14, the terminal processing apparatus 50 has a receiving jig 60 and a winding mechanism portion 80 having the same configuration as that of the first embodiment. As shown in FIG. 14, a case-like hot blade 75 is used, a hot-air blowing hole 75a is formed in the case-like hot blade 75, and the case-like hot blade 75a is passed through the hot-air blowing hole 75a from the hot-air supply mechanism 75b. Hot air is blown into the hot blade 75, and the foamed resin base material 21 is heated and softened by the hot air. A protrusion 72 is formed on the outer lower edge of the case-like hot blade 75.

  In the second embodiment, as shown in FIG. 15, the door trim upper 20 is set and positioned and fixed on the set base 61 of the receiving jig 60, and then the case-like hot blade 75 is driven by the cylinder 73. The lowering operation is performed, hot air is blown into the case-like hot blade 75 from the hot air supply mechanism 75b, and the foamed resin base material 21 is heated and softened using the hot air as a base. A thin hinge portion 24 is formed. In this way, when hot air is blown to soften the entrainment part of the foamed resin base material 21, a uniform heat softening treatment can be performed in a short time without being affected by the unevenness of the surface of the foamed resin base material 21. The terminal processing time can be shortened.

  After that, as shown in FIG. 16, when the table driving cylinder 86 of the winding mechanism unit 80 operates and the table 84 rises, the winding piece 25 is moved into the case-shaped hot blade 75 by the winding piece 81. The foamed resin base material 21 on the back surface of the winding white 25 is heated and softened by the heat transfer action from the case-like hot blade 75 that rises along the outer side surface 75c. Next, after the case-like thermal blade 75 is retracted to the standby position, the same process as in the first embodiment is performed in which the winding piece 81 performs the winding process of the winding scissors 25 by the operation of the advance / retreat cylinder 83. It will be.

  Also in the second embodiment, since the terminal processing step of the door trim upper 20 does not use an adhesive, the working environment is preferable and the processing time can be shortened, as compared with the case where the terminal is cut. Since the winding scissors 25 are subjected to the winding process, there is an advantage that the appearance is excellent such as a double core material, rigidity can be strengthened, the cut end is not conspicuous, and the outer peripheral line can be formed sharply. Compared to the first embodiment, in addition to the case-like hot blade 75, since hot air is used, the softening time of the foamed resin base material 21 can be shortened and a uniform softened state can be obtained. is there.

  FIGS. 17 to 21 show a third embodiment of the present invention. FIG. 17 is a sectional view showing the structure of the terminal portion of the door trim upper, and FIGS. 18 and 19 are explanatory views showing the terminal treatment process of the door trim upper. 20 is a cross-sectional view showing the structure of the terminal portion of the door trim upper according to a modification of the third embodiment. FIG. 21 is an explanatory view showing the terminal processing step of the door trim upper.

  As shown in FIG. 17, the door trim upper 20 in the third embodiment is such that, in the terminal processing part A, the winding scissors 25 are wound on the back side of the extension part 212 based on the thin hinge part 24, and As in the first and second embodiments, a beautiful outer peripheral line can be secured, the appearance can be enhanced, and in particular, the thickness of the terminal processing portion A is set thinner than the thickness of the general portion. It is a feature. Therefore, the rigidity of the terminal processing unit A becomes stronger, deformation and the like can be reliably prevented, and the alignment accuracy with respect to the counterpart component can be further improved.

  In order to achieve the cross-sectional structure shown in FIG. 17, a heating block 76 and a receiving block 77 are used as the heating jig 70 as shown in FIG. It is necessary to heat and soften both the foamed resin base materials 21 in the extension part 212 for polymerizing the white 25, and at the same time, press the thin resin. After that, as shown in FIG. 19, by the operation of the winding piece 81 in the winding mechanism portion 80, the winding white 25 is folded back based on the thin hinge portion 24, and the winding white 25 is integrated with the main body side. Terminal processing step is completed.

  Therefore, in the third embodiment, the winding white 25 and the winding white 25 are replaced with the heating softening step of the foamed resin base material 21 by the heating jig 70 and the thin hinge portion 24 forming step in the first embodiment. This is characterized in that a process of thinning and flattening the foamed resin base material 21 of the extension part 212 to be polymerized at the same time by heating is softened. As a result, the rigidity of the terminal processing unit A can be further strengthened, and by reducing the thickness of the terminal processing unit A, problems such as interference with the counterpart component can be avoided, and the alignment accuracy can be improved. There is an advantage that you can.

  20 and 21 are modified examples in which the portion to be thinned by the heating block 76 is extended to the tip of the vertical wall flange portion 211. In this case, there is an attendant advantage that the polymerization area by the entrainment scissors 25 is expanded and the rigidity can be further strengthened.

  22 to 27 show a fourth embodiment of the present invention. FIG. 22 is an explanatory view showing the overall configuration of the terminal processing apparatus. FIGS. 23 to 26 are terminals of a door trim upper using the terminal processing apparatus. FIG. 27 is a sectional view showing the configuration of the terminal processing unit. As shown in FIG. 22, the terminal processing apparatus 50 in this 4th Example is the same as that of each Example mentioned above in the structure of the receiving jig 60 and the winding mechanism part 80, The difference is a heating jig 70. It is in the configuration. That is, in the corner portion (the portion along the outer edge of the lower surface) of the block-shaped hot blade 71, a serrated blade 78 having a sharp blade edge is formed in order to peel off and remove the foamed resin base material 21 on the back surface of the entrainment white 25. Has been. Since other configurations are the same as those of the first embodiment, detailed description thereof is omitted.

  Next, a terminal processing process in the fourth embodiment will be described. First, as shown in FIG. 23, the door trim upper 20 is set on the setting base 61 of the receiving jig 60, the door trim upper 20 is positioned and fixed by the spacer 62 and the receiving jig pressing 63, and then the operation of the cylinder 73 is performed. The hot blade 71 is brought into contact with the back surface of the foamed resin base material 21 of the extension part 212 or confronted via a minute clearance to heat and soften the foamed resin base material 21 of the extension part 212 and to be thinned by the serrated blade 78. A hinge portion 24 is formed.

  Next, as shown in FIG. 24, by raising the table 84 in the winding mechanism unit 80, the winding piece 81 is simultaneously raised, and the door trim upper 20 is moved along the outer surface 71 a of the block-shaped hot blade 71. While raising the winding scissors 25, the foamed resin base material 21 on the back of the winding scissors 25 is heated and softened. At this time, as shown in an enlarged view in FIG. 24, the thin hinge portion 24 is restricted to the winding assist shape, so that the folding operation of the winding scissors 25 at the time of winding can be performed smoothly.

  After that, as shown in FIG. 25, when the hot blade 71 is lifted by driving the cylinder 73, the foamed resin base material 21 on the back surface of the winding white 25 is peeled off by the serrated blade 78 formed at the corner portion of the hot blade 71. It will be. Thereafter, as shown in FIG. 26, the advancing / retreating cylinder 83 in the winding mechanism unit 80 operates, the slider 82 and the winding piece 81 move forward, and the winding scissors 25 are folded back based on the thin hinge portion 24. This completes the processing of the terminal portion of the door trim upper 20 shown in FIG. As shown in the drawing, since the foamed resin base material 21 is peeled off by the serrated blade 78 provided on the hot blade 71 in the winding white 25, the winding white 25 is extremely thin, and the thickness of the terminal processing part A is shown. (Dimension h in the figure) can be shortened, the alignment accuracy can be increased, the flexibility of the winding scissors 25 can be utilized, and the winding operation can be easily performed.

In the embodiment described above, the method of the present invention is applied to the terminal processing method of the door trim upper 20 in the two-tone type automobile door trim 10, but it can also be applied to a manufacturing method of an integrated door trim. The present invention can be applied to a manufacturing method for all interior parts other than the door trim 10 such as a rear parcel shelf, a floor trim, a luggage trim, a trunk trim, a rear side trim, and a roof trim.

It is a front view which shows the 1st Example of the door trim for motor vehicles manufactured by applying the method of this invention. It is the II-II sectional view taken on the line in FIG. It is a front view which shows the resin rib and door trim lower of the door trim upper in the door trim for motor vehicles shown in FIG. FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 1 and is a cross-sectional view illustrating a configuration of a terminal processing unit of a door trim upper. It is explanatory drawing which shows the setting process of the raw material in the shaping die in the manufacturing method of the door trim upper shown in FIG. It is explanatory drawing which shows the formation process in the manufacturing method of the door trim upper shown in FIG. It is explanatory drawing which shows the whole terminal processing apparatus structure used for 1st Example of the terminal processing process in the manufacturing method of the door trim upper shown in FIG. It is explanatory drawing which shows 1st Example of the terminal process process in the manufacturing method of the door trim upper shown in FIG. It is explanatory drawing which shows 1st Example of the terminal process process in the manufacturing method of the door trim upper shown in FIG. It is explanatory drawing which shows 1st Example of the terminal process process in the manufacturing method of the door trim upper shown in FIG. It is explanatory drawing which shows the whole structure of the terminal processing apparatus used for the modification of 1st Example of the terminal processing process in the manufacturing method of the door trim upper shown in FIG. It is explanatory drawing which shows the heat softening process process by the heating jig which uses the terminal processing apparatus shown in FIG. It is explanatory drawing which shows the standing up and heating softening process process of the winding white using the terminal processing apparatus shown in FIG. It is explanatory drawing which shows the whole structure of the terminal processing apparatus used for 2nd Example of the manufacturing method of the interior component for motor vehicles which concerns on this invention. It is explanatory drawing which shows the heat softening process process by the heating jig using the terminal processing apparatus shown in FIG. It is explanatory drawing which shows the standing-up and heating softening process process of the winding white using the terminal processing apparatus shown in FIG. It is sectional drawing which shows the structure of the terminal process part of the door trim upper in 3rd Example of the manufacturing method of the interior component for motor vehicles based on this invention. It is explanatory drawing which shows the heat softening process of the terminal process part in the door trim upper shown in FIG. It is explanatory drawing which shows the winding process process of the terminal process part in the door trim upper shown in FIG. It is sectional drawing which shows the modification of the terminal process part in the door trim upper shown in FIG. It is explanatory drawing which shows the terminal process process for forming the terminal process part shown in FIG. It is explanatory drawing which shows the whole structure of the terminal processing apparatus used for 4th Example of the manufacturing method of the interior component for motor vehicles based on this invention. It is explanatory drawing which shows the heat softening process process by the heating jig using the terminal processing apparatus shown in FIG. It is explanatory drawing which shows the standing up and heating softening process process of the winding white using the terminal processing apparatus shown in FIG. It is explanatory drawing which shows the peeling process of the foaming resin base material of the entrainment white back surface using the terminal processing apparatus shown in FIG. It is explanatory drawing which shows the return process of the winding white using the terminal processing apparatus shown in FIG. It is sectional drawing which shows the structure of the terminal process part of the door trim upper in 4th Example of the manufacturing method of the interior component for motor vehicles which concerns on this invention. It is a front view which shows the conventional door trim. FIG. 29 is a sectional view taken along line XXIX-XXIX in FIG. It is explanatory drawing which shows the outline | summary of the shaping | molding method of the conventional door trim for motor vehicles. It is explanatory drawing which shows the prior art example of the terminal part of the door trim for motor vehicles by press molding. It is explanatory drawing which shows the prior art example of the terminal part in the door trim for motor vehicle of a skin-wrapping type.

Explanation of symbols

10 Two-tone type automotive door trim 20 Door trim upper (laminated structure)
21 Foamed resin base material 211 Vertical wall flange 212 Extension part 22 Resin rib 23 Decorating material 24 Thin hinge part 25 Rolling white 30 Door trim lower (single resin product)
40 Molding mold 41 Molding upper mold 42 Molding lower mold 43a, 43b Injection machine 50 Terminal processing device 60 Receiving jig 61 Set stand 62 Spacer 63 Receiving jig holder 70 Heating jig 71 Hot blade (block shape)
72 Projection 73 Cylinder 74 Hot blade (plate shape)
75 Hot blade (case shape)
75a Hot air blowing hole 75b Hot air supply mechanism 76 Heating block 77 Receiving block 78 Giza blade 80 Winding mechanism part 81 Winding piece 82 Slider 83 Advancing / retreating cylinder 84 Table 85 Guide rail 86 Table driving cylinder S Foamed resin sheet M1, M2 Molten resin A Terminal processing section

Claims (3)

A laminated structure comprising a foamed resin base material (21) molded into a required shape and having shape retention , and resin ribs (22) having a predetermined pattern shape laminated and integrated on the back surface of the foamed resin base material (21) In the manufacturing method of the interior part (10) for automobiles formed by adopting the body (20) in whole or in part,
In the laminated structure (20), the foamed resin sheet (S), which is the material of the foamed resin base material (21), is heat-softened and then set in the molding dies (41, 42). 41, 42) are clamped together, and the foamed resin base material (21) is molded into a required shape along the cavity shape of the molding die (41, 42), and matched to the pattern shape of the resin rib (22). Then , the molten resin (M1) is injected and filled from the injection machine (43) into the groove (424) formed on the mold surface of the molded lower mold (42), and the resin rib (22) is expanded to the foamed resin base material (21 ) Of the laminated structure (20) laminated and integrated on the back surface side,
After the laminated structure (20) formed in the forming step is removed from the molding dies (41, 42) and set on the receiving jig (60), the laminated structure (20) at the edge of the laminated structure (20) A heating jig (70) is brought close to or in contact with the back surface side of the foamed resin base material (21) to heat and soften the foamed resin base material (21) inside the winding scissors (25). After forming the thin hinge portion (24) at the folding base point of the winding scissor (25 ) by the protrusion (72) of the tool (70), the winding piece is moved by the advancing / retreating cylinder (83) and the table driving cylinder (86). After positioning the winding piece (81) below the winding roller (25) positioned horizontally, using the winding mechanism part (80) in which (81) can be moved back and forth and vertically movable, By driving the table drive cylinder (86) The winding piece (81) is raised, and the winding piece (25) is raised so that the back surface of the winding piece (25) comes into contact with the side surface of the heating jig (70). ), And then the heating jig (70) is retracted upward, and the retracting piece ( 81) and the terminal processing step of the laminated structure (20) in which the winding (25) is wound on the back surface of the foamed resin base material (21) based on the thin hinge portion (24). A method for manufacturing an interior part for an automobile, which is manufactured by a process. In the terminal processing step of the laminated structure (20), when the back side of the foamed resin base material (21) is heat-softened by the heating jig (70), the pressing pressure from the heating jig (70) The thickness of the terminal treatment part (A) in the laminated structure (20) is reduced by compressing and flattening the rolled sheet (25) and the portion where the rolled sheet (25) is polymerized into a thin-walled structure. The method for manufacturing an automotive interior part according to claim 1 , wherein the thickness is set to be thinner than the thickness of other parts. In the terminal processing step of the laminated structure (20), a serrated edge (78) is formed at the corner of the heating jig (70), and the back surface of the foamed resin substrate (21) is heated by the heating jig (70). After the softening treatment, by driving the table driving cylinder (86), the winding piece (81) is raised, and the winding scissors (25) are raised along the side surface of the heating jig (70) and are heated and softened. After that, the heating jig (70) was raised, and the foamed resin base material (21) of the entraining scissors (25) was peeled off by this serrated blade (78), thereby reducing the thickness of the encasing scissors (25). Thereafter, the heating jig (70) is retracted upward, and then the winding piece (81) is slid by driving the advancing / retreating cylinder (83), so that the thin-walled winding scissors (25) in an upright state wrapping, characterized by welded and fixed claim 1 Automotive interior parts manufacturing method described.

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