JP2004224322A - Extrusion molded part for automobile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To form a trim and a weather strip used in each opening part of a vehicle body while a synthetic resin core member having U-shaped cross section is covered with an outer peripheral covering body made of soft synthetic resin. <P>SOLUTION: A molded part main body 1 is constituted by blanking cut-out parts having various desired shapes continuously or incontinuously in the hard synthetic resin core member 2 having U-shaped cross section and covering their outer peripheries with the outer peripheral covering body 3. The outer peripheral covering body forms an inner peripheral pressing-in part 5 provided with a hollow chamber 9 by extending its outer periphery and forms a holding piece 6 having predetermined shape and size integrally. The inner peripheral pressing-in part provided with the holding piece at the outer periphery of the outer peripheral covering body is divided into left and right parts, and a tip part in the longitudinal direction of the outer peripheral covering body is fitted in an inner face on one side of a lower end part having U-shaped cross section of the hard synthetic resin core member to form the molded part main body. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
[Industrial applications]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an extruded product for an automobile used for a holding portion of an opening such as a trim, a weather strip, and a window molding used for an opening of a vehicle body such as a door, a trunk, and a window of an automobile.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a metal core material is generally used as a core of a trim, a weather strip, a wind molding, and the like used for an opening of a vehicle body of this kind of an automobile. Then, the metal core material as the manufacturing method is formed by punching out cutouts of various shapes in a state where the cross section is a flat plate, and extruding the flat plate core material with the cutout using a material such as synthetic resin or rubber. A coating layer and a holding piece are formed on the front and back of the material. Then, it is manufactured by being bent into a U-shaped cross section.
[0003]
However, due to the recent increase in environmental problems and the like, it is presently being studied to change the material to a hard synthetic resin in order to reduce the weight and recycle the metal core material.
[0004]
However, if the hard synthetic resin core is manufactured from a flat plate in the same manner as the metal core, it is very difficult to bend it into a U-shaped cross section. Therefore, a synthetic resin core having a U-shaped cross section is extruded in advance. Then, a large number of cut portions are formed by a punching machine, and a synthetic resin core material with the cut portions is formed. After that, the outer periphery of the core material having a U-shaped cross section is coated with a coating layer by extrusion molding, and the core material having the U-shaped cross section needs to be coated with an outer coating layer on the inner surface side, In the coating layer located on the inner surface side, a plurality of corresponding holding pieces for press-contact for holding the vehicle body opening of the automobile are formed.
[0005]
However, in forming the opposing holding pieces, a plurality of the holding pieces may be formed on the inner peripheral surface having a U-shaped cross section because an insertion gap portion is very narrow when the holding pieces are inserted into a flange such as an opening of a vehicle body. It is a difficult matter. In order to improve the retention with the flange, it is important to narrow the insertion gap, but the shape and position desired between the very narrow gap on the inner surface side of the U-shaped cross section are desired. There is a serious problem that the holding piece cannot be extruded reliably.
[0006]
[Problems to be solved by the invention]
The present invention has been made in order to solve the above-mentioned problems, and a coating layer is formed on the outer and inner circumferences of a conventional U-shaped synthetic resin core with a cut-off portion, and a U-shaped cross section is provided. It is very difficult to form a desired shape so as to reduce the gap between the opposite holding portions projecting from the inner surface of the shape.
Therefore, the present invention does not form the bent strip piece inside the synthetic resin core material having a U-shaped cross section as in the prior art, but does not form the bent strip piece in advance inside the U-shaped cross section as shown in FIG. After extruding the inner peripheral pushing portion from the U-shaped tip portion to the lower side of the outer peripheral covering while expanding the inner peripheral pushing portion, the inner peripheral pushing portion is pushed toward the inner surface of the U-shaped cross section to complete as shown in FIG. It is the point that it did.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, a feature of the automotive extrusion molded product of the present invention is that the molded product main body is composed of a longitudinal synthetic resin core material having a U-shaped cross section and a longitudinal outer peripheral covering body. The synthetic resin core is punched out with cut portions of various shapes leaving continuous or discontinuous intervals. The outer peripheral covering body that covers the entire outer periphery of the U-shaped cross section of the synthetic resin core material has an inner peripheral pressing portion formed in part. A part or the whole of the outer peripheral cover is adhered or covered on the outer periphery of the synthetic resin core material. Further, a plurality of projecting holding pieces for pressure contact are integrally formed on the outer periphery of the inner peripheral pushing portion provided on the outer peripheral covering.
[0008]
Next, a second feature of the present invention is that the inner peripheral pushing portion provided with a plurality of holding pieces on the outer periphery of the inner peripheral pushing portion of the outer peripheral covering body is divided into right and left.
[0009]
A third feature of the present invention is that a longitudinal end portion of an outer peripheral covering body provided with a holding piece on one inner surface of a lower end portion of a U-shaped cross section of a synthetic resin core material is applied. .
[0010]
A fourth feature of the present invention resides in that the entire inner side of the synthetic resin core is covered with the inner peripheral pressing portion of the outer peripheral covering.
[0011]
[Action]
The use of the extruded product for an automobile configured as described above will be described. The molded product main body (1) shown in FIGS. 1, 7, 11 and 13 is used for opening a door, a trunk, a window, etc. of a vehicle body of an automobile. When used for trim, weather strip, wind molding, etc. of a part, a part of the outer peripheral covering body (3) covering the entire outer periphery of the U-shaped cross section of the synthetic resin core material (2) of the molded article main body (1) is used. 2, 8, 12, and 14, the inner peripheral pressing portion (5) is pressed into the inside of the synthetic resin core material (2), and the inner peripheral pressing portion (5) is pressed. The holding pieces (6) and (6) for press-contact provided on the outer periphery of the peripheral pressing portion (5) constitute a relatively narrow gap (A). An edge of an opening of a door, a trunk, a window, or the like is inserted into the gap (A) so as to be clamped.
[0012]
【Example】
Next, an embodiment of the present invention will be described with reference to the drawings. A molded product main body (1) shown in the drawing is provided with a holding piece for press-contact in the state of FIG. (6) A flange is inserted into the gap (A) of (6) for use. In the cross-sectional view shown in FIG. 1, the molded article main body (1) is composed of a U-shaped cross section of a synthetic resin core material (2) in the longitudinal direction and an outer circumferential covering (3) in the longitudinal direction. .
[0013]
The synthetic resin core material (2) in the molded article main body (1) shown in FIG. 1 has a U-shaped cross section made of a hard synthetic resin as shown in FIGS. 3, 4, and 5, and has various shapes as necessary. Of the upper excision part (7) (7) and the excision part (8) (8) etc. of the side is continuous or discontinuous through the connecting part (10) (10) and the connecting part (11) (11). Are formed continuously by punching by providing the interval portions (13) and (13). Reference numeral (4) indicates an end of a synthetic resin core (2) having a U-shaped cross section.
[0014]
Next, the outer peripheral cover (3) covering the entire outer periphery of the U-shaped cross section of the synthetic resin core material (2) is made of a soft synthetic resin or rubber.
The outer peripheral covering (3) has an inner periphery extending at the ends (4) and (4) at both ends of the opening of the synthetic resin core material (2) so as to be pushed into the interior in a concave arc shape. An inner peripheral pushing portion (5) provided with a hollow chamber (9) is integrally formed. As shown in FIG. 6, a part of the outer peripheral cover (3) is adhered to the synthetic resin core (2), and a space (12) is provided on the outer periphery of the synthetic resin core (2). It is formed in a coated state. However, the space portion (12) may actually be in a contact state and have no space.
[0015]
The inner peripheral pushing portion (5) is formed with holding pieces (6) and (6) of various shapes having one or more tips protruding at predetermined positions on the outer periphery.
[0016]
Next, what is shown in FIG. 2 is that when the inner peripheral pushing part (5) integral with the outer peripheral covering body (3) formed in FIG. It shows a state where it is pushed toward the inside of the synthetic resin core material (2). Since the holding pieces (6) and (6) at this time are surely formed into a predetermined shape, they sufficiently fulfill the role of securely pressing and holding the flanges or the like of the vehicle body opening from both sides. .
[0017]
FIG. 7 shows another embodiment in which the synthetic resin core material (2) is coated so as to provide a space (12) without bonding the bonding surface with the outer peripheral cover (3). FIG. 8 shows the case of using from the state shown in FIG. 7, and the inner peripheral pushing portion (5) is provided with a space (12) toward the inside of the synthetic resin core (2). FIG. 5 shows a slope view pushed into the slab.
[0018]
9 and 10 show another embodiment of the molded article main body (1) of the present invention. The molded article main body (1) is provided on the outer periphery of the inner peripheral pushing portion (5) provided integrally with the outer peripheral covering (3). It is a cross-sectional view in which the provided holding pieces (6) and (6) for pressure contact are formed in a circular shape having a through hole therein. FIG. 10 shows a slope formed alternately without facing the holding pieces (6) and (6) provided in the inner peripheral pushing portion (5).
[0019]
FIG. 11 shows an embodiment according to claim 2 of the present invention, in which an inner peripheral pushing portion (5) provided with holding pieces (6) (6) on the outer periphery of the outer peripheral covering (3) is used. It is sectional drawing extruded | molded in the state which divided | segmented so that it might oppose the left and right of a longitudinal direction, and each provided the front-end | tip part (25) (25).
FIG. 12 shows a state in which the state shown in FIG. 11 is used, and the tip portions (25) (25) are directed toward the inside of the synthetic resin core (2). ) Is a sectional view in which a space (12) is provided and pushed in. Reference numeral (26) indicates a joint between the distal ends (25) and (25).
[0020]
Next, what is shown in FIG. 13 is a cross-section according to claim 3, wherein the holding piece (6) ( FIG. 6 is a cross-sectional view of a molded product body (1) extruded with a longitudinal end portion (25) of an outer peripheral covering (3) provided with 6) adhered thereto.
FIG. 14 shows a state in which the one shown in FIG. 13 is used, and the outer periphery of the synthetic resin core material (2) is defined with one lower end portion (4) having a U-shaped cross section as a base point. The covering body (3) is sequentially passed through the other lower end portion (4) from the outer periphery of the synthetic resin core material (2) to the front end portion (25) of the inner peripheral pushing portion (5) to the synthetic resin core material (2). It is a perspective view showing the state where it pushed in so that it might be rolled up in an inner skin, and the tip part (25) was in contact with the joint part (26) at one tip part (25).
[0021]
FIG. 15 shows an embodiment of another use state of the present invention, in which the entire outer periphery of a U-shaped cross section of the synthetic resin core material (2) and the inner peripheral surface of the synthetic resin core material (2) are shown. Also, a double coating layer (13) which is doubled is applied.
Further, the double coating layer (13), the inner pressing portion (5), and the holding pieces (6) and (6) are integrally formed with the outer coating body (3) made of a soft synthetic resin or rubber. Have been. Further, a bulging portion (15) provided with a through hole (14) serving as a buffer or the like on the outer peripheral side surface of the molded article main body (1) is formed in the longitudinal direction.
[0022]
Next, FIG. 16 shows an ideal gap of the prior art, in which a desired small gap (A) is formed, but cannot be formed by the actual conventional technique.
[0023]
FIG. 17 shows a product molded by a conventional technique, in which a synthetic resin core material (2) having a U-shaped cross section is provided with a soft synthetic resin or rubber outer peripheral covering (3). When the inner pressing portion (5) of the core material (2) and the holding members (6) and (6) for press contact protruding from the outer periphery thereof are formed at the same time, the opposite holding members (6) and the holding members ( This is a drawback in that the insertion gap with 6) cannot be formed small and the gap (A) becomes extremely large.
[0024]
Next, an embodiment of the manufacturing process of the continuous production according to the present invention will be described with reference to FIG. 18. The first extruder (16) into which the hard synthetic resin is injected passes through the inside of the first die (17). After passing through the cooling layer (18), the synthetic resin core material (2) having a U-shaped cross section to be molded is cut by a punching machine (19) as necessary, such as a cut portion (8) or a cut portion (7). Cutouts of various shapes are punched and formed at continuous or discontinuous intervals, and then the synthetic resin core material (2) with the cutouts enters the second die (21), and the second extruder ( 20) The outer peripheral coating (3) is formed on the outer periphery having a U-shaped cross section by the soft synthetic resin or rubber injected thereinto, and at the same time, the inner periphery having a hollow chamber formed therein by being connected to the outer peripheral covering (3). A predetermined shape and a required number of press-contact portions are formed on the pressing portion (5) and the outer periphery of the inner pressing portion (5). Jihen (6) which has been fed through the cooling layers after integrally extrusion (22) (6). Further, in the case of extrusion molding of rubber, a vulcanizing tank is added after the second die (21).
The manufacturing process is a manufacturing process in which the synthetic resin core material (2), the outer peripheral cover (3), the inner peripheral pressing portion (5), and the like are continuous. There is also a method in which the outer peripheral covering body (3) and the inner peripheral pushing part (5) made of a soft synthetic resin or rubber are separately formed and formed, and both are inserted and combined.
[0025]
Next, the materials used in the present invention will be described. Hard synthetic resins forming a synthetic resin core material (2) having a U-shaped cross section include olefin resins such as polypropylene and polyethylene, styrene resins, and nylon resins. In some cases, an inorganic powder such as talc, mica, or glass fiber is mixed with a polyester resin or the like or a hard synthetic resin thereof to increase the rigidity and heat resistance of the hard synthetic resin and reduce the linear expansion coefficient.
Further, as the soft synthetic resin forming the outer peripheral cover (3), an olefin resin, a styrene resin, a thermoplastic elastomer thereof, and a soft vinyl chloride or rubber having a hardness of 90 or less (JIS K7215A hardness) are used.
Also, the soft synthetic resin forming the inner peripheral pressing portion (5) and the holding pieces (6) and (6) for press contact is manufactured by one extruder using the same material as the outer peripheral covering (3). When changing the hardness and type of the material according to the method and the desired function, quality, etc. of the inner peripheral pressing part (5), the holding pieces (6), (6), use a second or third extruder. It may be formed by polymerization extrusion.
[0026]
【The invention's effect】
According to the present invention configured as described above, compared with an extruded product using a conventional metal core material, since it is a synthetic resin core material, the weight is significantly reduced, and the effect of excellent recycling is achieved. Thus, there is an effect that the work of bending the core material of the hard synthetic resin into a U-shaped cross section from the flat plate becomes unnecessary. According to the extrusion-molded product of the present invention, the synthetic resin core with the cutout having a U-shaped cross section has the effect of partially changing the thickness of the U-shaped plate as needed, and further, When necessary, cutouts of various shapes, such as cutouts, are punched out at continuous or discontinuous intervals, so that they can sufficiently cope with conventional metal cores and can be attached three-dimensionally to the body of an automobile. it can.
Furthermore, since it is just covered, the synthetic resin core material and the outer peripheral cover can be easily separated, and there is an excellent effect that recycling by material is possible.
In addition, since the outer peripheral covering body covering the outer periphery of the molded article body is extended to form a hollow chamber inside and the holding piece is integrally formed on the outer periphery of the outer peripheral covering body, the size and shape of the holding piece are reduced. There is a practical effect that the molded product can be reliably formed into a desired shape, and an effect that the molded product can be extremely securely attached to the opening of the vehicle body.
Further, the present invention has an effect that the size, direction and shape of the holding piece can be extremely easily and reliably formed by forming the inner peripheral pressing portion provided with the holding piece on the outer periphery divided into right and left. In addition, since the longitudinal end of the outer peripheral covering is adhered to one inner surface using the lower end of the U-shaped cross section of the synthetic resin core material, the outer peripheral covering and the inner peripheral pushing portion are provided. There is an effect that the size, direction, and shape of the holding piece can be extremely easily formed, and a convenient effect that the assembling at the time of use with the outer peripheral covering member that covers the synthetic resin core material can be easily and reliably performed.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an extruded product in which an outer peripheral coating layer of a soft synthetic resin is formed on the outer periphery of a synthetic resin core material having a U-shaped cross section according to the present invention.
FIG. 2 is a perspective view showing a state where the inner peripheral pressing portion of the present invention is pressed toward the inner surface of the synthetic resin core.
FIG. 3 is a perspective view of a synthetic resin core material having a U-shaped cross section according to the present invention.
FIG. 4 is a perspective view in which cut portions of the synthetic resin core material of the present invention are cut at continuous intervals.
FIG. 5 is a perspective view of the side cut portion of the present invention cut at discontinuous intervals.
FIG. 6 is a longitudinal sectional side view showing a synthetic resin core material of a molded article main body according to another embodiment of the present invention, and a part of an outer peripheral covering body adhered thereto.
FIG. 7 is a vertical sectional side view of an assembled state in which a space is provided between a synthetic resin core material and an outer peripheral cover of the molded article body of the present invention.
FIG. 8 is a perspective view of the used state in which the inner peripheral pushing portion shown in FIG. 7 of the present invention is pushed into the inside of the synthetic resin core material.
FIG. 9 is a cross-sectional view showing a deformed state of a holding piece provided on the outer circumference of the inner pressing section of the present invention.
FIG. 10 is a perspective view in which holding pieces provided in the inner peripheral pressing portion of the present invention are alternately provided.
FIG. 11 is a longitudinal sectional side view showing an embodiment of the molded article main body of the present invention.
FIG. 12 is a cross-sectional view of the same when using FIG. 11 of the present invention.
FIG. 13 is a sectional view of another embodiment of the molded article body of the present invention in a molded state.
FIG. 14 is a cross-sectional view of the embodiment of the present invention showing a use state from the state shown in FIG. 13;
FIG. 15 is a perspective view of another embodiment of the present invention, in which a bulging portion is formed on one side of a molded product main body.
FIG. 16 is an oblique view showing an ideal gap of a conventional technical product, in which a small gap portion in which a core member is covered with an outer peripheral cover is formed.
FIG. 17 is a cross-sectional view of a related art product in which a large gap is formed between holding pieces each having a U-shaped core material covered with an outer peripheral cover.
FIG. 18 is a side view showing a manufacturing process of the extruded product of the present invention.
[Explanation of symbols]
A Gap 1 Molded product body 2 Synthetic resin core material 3 Outer coating 4 End 5 Inner pressing part 6 Holding piece 7, 8 Cutout 9 Hollow chamber 10, 11 Connecting part 12 Space part 13 Double coating layer 14 Penetration Hole 16 First extruder 17 First die 18 Cooling tank 19 Punch 20 Second extruder 21 Second die 25 Tip 26 Joint

Claims (4)

2. Description of the Related Art In an extruded product for an automobile such as a trim, a weather strip, or a window molding used for an opening in a vehicle body such as a door, a trunk and a window of an automobile body, a molded product body (1) has a U-shaped cross section in a longitudinal direction. It is composed of a synthetic resin core material (2) and a longitudinal outer peripheral covering body (3). The synthetic resin core material (2) is provided with cutouts (7) and (8) of various shapes as necessary. The outer peripheral covering body (3), which is formed by punching and forming continuous or discontinuous intervals (13) and (13) and covers the entire outer periphery of the synthetic resin core material (2) having a U-shaped cross section, is made of a soft synthetic resin. Alternatively, the outer circumferential cover (3) is partially provided with an inner circumferential pressing portion (5), and the outer circumferential cover (3) is attached to the outer periphery of the synthetic resin core (2). It is adhered or covered, and protrudes to a predetermined position on the outer periphery of the inner pushing portion (5). The holding piece for pressing (6) (6) The automotive extrudate, characterized in that integrally formed. An extruded product for automobiles, characterized in that an inner peripheral pushing part (5) provided with holding pieces (6) (6) on the outer periphery of the outer peripheral covering body (3) according to claim 1 is divided into right and left parts. The longitudinal end of an outer peripheral covering (3) provided with holding pieces (6) (6) on one inner surface of a lower end (4) of a U-shaped cross section of the synthetic resin core material (2) according to claim 1. 25. An extruded product for automobiles, wherein the product is coated with 25). The extruded product for an automobile according to claim 1, wherein the entire inner side of the synthetic resin core material (2) according to claim 1 is covered with an inner peripheral pushing portion (5) of an outer peripheral covering (3).

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