JP2005239110A - Synthetic resin core material and its extruded product - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a synthetic resin core material which improves retainability for retaining weather strip, wind molding or the like of an automobile in an opening of a vehicle body. <P>SOLUTION: A synthetic resin core material 1 is a molded product used for a synthetic resin core material molding or the like employed for an opening of various types of automobiles or the like, which has the substantially U-shaped cross section and forms facing sides 2 and a head part 5. In the side 2, a cut recess 3 or a notch 4 is formed at specified intervals toward the head 5 thereabove. The cut recess 3 and the notch 4 provided to the side 2 are continuously or discontinuously formed so as to be alternatively staggered along the facing sides. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a synthetic resin core material used for holding trims, weather strips, window moldings, and the like used for vehicle body openings such as automobile doors, trunks, and windows, and an extruded product thereof.

Conventionally, a metal core is generally used to increase the holding force for mounting the trim, weatherstrip, wind molding and the like of this type of vehicle to the vehicle body.
The metal core material as the manufacturing method is formed by punching out various shapes of cut portions with a flat cross section, and extruding the flat plate core material with the cut portions by 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, and then the material is manufactured by being bent into a substantially U-shaped section.

However, due to the recent increase in environmental problems, there is a demand for changing the material of the core material from metal to synthetic resin in order to reduce the weight and recycle the core material.
However, when a synthetic resin core material is manufactured from a flat plate in the same manner as a metal core material, there are many problems such as restoration to the original flat plate even if it is bent into a substantially U-shaped cross section. A resin core material is extruded and cut portions are formed at a number of opposing positions by a punching machine.

Furthermore, in order to attach to the opening of a car body of an automobile, the synthetic resin core material having a substantially U-shaped cross section has to be bent to a small curvature to further increase the holding force.
For this reason, if the cut part is formed symmetrically in the shape of a fishbone, the distance between the cut part and the cut part becomes short in order to bend to a small curvature (refer to the conventional example in FIG. 11), and the holding power is reduced. there were.

Problems to be solved by the invention

  The present invention was invented in order to solve the above-mentioned problems, and in order to make it easier to bend the conventional synthetic resin core material having a substantially U-shaped cross section, the width of the holding piece is reduced by reducing the interval between the cut portions. Since the holding force is reduced due to narrowing, the present invention is formed by alternately punching cut-out recesses or cuts on the side of the synthetic resin core material having a substantially U-shaped cross section.

Means for solving the problem

In order to achieve the above object, in the synthetic resin core material of the present invention, a synthetic resin core material having a substantially U-shaped cross section is formed in the longitudinal direction, and the synthetic resin core material is provided with opposing sides and a head, and is necessary. A synthetic resin core material is formed in which cut recesses and cuts having shapes corresponding to the above are alternately punched into continuous or discontinuous intervals. In addition, the excision recess or notch is made easier to bend by punching more than half of the head having a substantially U-shaped section.
Further, in the synthetic resin core material of the present invention, the opposite side sides are provided with a predetermined interval toward the head, and the cut recesses or cuts are alternately alternated with respect to the opposite side sides. Thus, it is formed continuously or discontinuously.
Furthermore, the synthetic resin core material covers the outer peripheral clothing body over the entire outer peripheral portion, and the entire outer peripheral portion or a part thereof is fused, and the inner peripheral portion of the synthetic resin core material includes the entire inner peripheral portion or both left and right sides. An inner peripheral cover is fused to the inner side of the lower end. The inner periphery covering body is formed by integrally pressing a holding piece for pressure contact on one side or both left and right sides.
In addition, the inner cover of the synthetic resin core has a holding piece for press-contact integrally with the inner cover on one side, and the other inner cover has an inner periphery. An inner peripheral pushing portion extending outside the portion is formed, and a pressing piece for pressing is integrally formed on the outer periphery of the inner circumferential pushing portion.
Furthermore, the inner peripheral covering of the synthetic resin core material is extended to the outside of the inner peripheral portion from the inner peripheral coverings on the left and right sides of the opposite side sides, and is connected to the left and right sides of the curved inner periphery. And a single or a plurality of pressing pieces for pressing are integrally formed at predetermined positions on the outer periphery of the inner peripheral pushing portion.

The invention's effect

According to the present invention configured as described above, unlike the conventional metal flat core material, since it is a synthetic resin core material, it is significantly lighter, without causing rust, Because of the effect that can sufficiently cope with recyclability and the core material made of hard synthetic resin, there are the effects that the bending of the substantially U-shaped cross section is extremely easy and the bending portions of the opening portions can be attached very reliably.
And, the synthetic resin core material formed in the longitudinal direction with a substantially U-shaped cross section is formed by continuously or discontinuously forming cut recesses or incisions in opposite positions on opposite sides toward the head, Regardless of the size of the excision recess or notch provided in the synthetic resin core material, the synthetic resin core material can be bent upward and backward, and the synthetic resin core material can be Since it can be bent, there is an unprecedented convenient effect that the mounting position is wide. Furthermore, there is an effect that the punching machine is simplified by changing from the cut recess to the cut.
In addition, since the outer peripheral cover made of a soft synthetic resin to be fused to the synthetic resin core material and the inner peripheral cover and a part of the inner periphery are fused, the whole is firmly fused and a part of the fusion is fused. Can save material.
Further, by fusing one end and both ends of the inner peripheral covering provided on the inner peripheral portion of the synthetic resin core material with the inner surface joint portion, the inner peripheral pushing portion can be easily extended to the outside and There is a convenient effect that the size, shape, and number of holding pieces to be provided can be freely adjusted, and a gap between the holding pieces can be freely reduced so that the attachment and holding to the flange or the like can be attached extremely firmly.
In addition, the synthetic resin core material and its molded product can be obtained by extruding by changing the thickness of a predetermined portion of the side and head thickness of the synthetic resin core material having a substantially U-shaped cross section as necessary. It is toughened and has the effect of being able to reinforce the parts that require strength.

  According to the present invention, the synthetic resin core material and the extrusion-molded product thereof are shown in FIGS. 3, 4, 5, 7, and 7 in comparison with the synthetic resin core material shown in FIGS. When the molded product body (C) shown in FIG. 13 is used for trims, weather strips, window moldings, etc. of openings of automobile body doors, trunks, windows, etc., the molded product body (C The inner peripheral pushing part (16) of the inner peripheral cover (8) connected to the outer peripheral cover (7) covering the entire outer periphery of the substantially U-shaped cross section of the synthetic resin core (1) The molded product body (C) shown in FIGS. 6 and 8 is used. In this state, a gap portion (A) as narrow as possible is formed between a predetermined position and a predetermined number of opposing pressing pieces (9) (9) provided on the outer periphery of the inner peripheral pushing portion (16). Attachment is performed by inserting and pinching the edges of openings such as doors, trunks, and windows with respect to the gap (A).

  Next, the embodiment of the present invention will be described with reference to the drawings. The synthetic resin core material according to claim 1 used in the molded product body (C) shown in FIGS. 1), the synthetic resin core material (1) is molded in the longitudinal direction with a substantially U-shaped cross section from a hard synthetic resin, and has opposite side edges (2) and (2), and a head (5 ). One side (2) shown in FIG. 1 is provided with a predetermined interval in the vertical direction toward the center of the head reaching the upper head (5), and various shapes of cut recesses (3) (3) To cut. On the other side (2) opposite to each other, the cut recesses (3), (3),... . The cut recesses (3), (3)... Provided on the side edges (2), (2), respectively, are continuously or indefinitely positioned alternately with the corresponding cut recesses (3), (3). The cut recesses (3) and (3) are continuously formed.

  Moreover, what is shown in FIG. 2 shows the Example of the synthetic resin core material (1) of Claim 2, Comprising: The upper head (5) in the position respectively opposed to the opposite side (2) (2). ) Are formed at predetermined intervals toward the center of the head at (4), (4),. The notches (4) and (4) provided on the side sides (2) and (2) are provided on the notch (4) provided on one side (2) and the other side (2). The provided cuts (4) are alternately formed alternately.

  Furthermore, what is shown in FIG. 3 shows an embodiment of the molded product body (C) of claim 3, and a soft synthetic resin is formed on the entire outer periphery of the synthetic resin core (1) shown in FIGS. The outer peripheral covering body (7) made of the product is fused, and the inner peripheral portion of the synthetic resin core material (1) is provided with the inner peripheral covering body (8) on at least a part of the entire inner peripheral portion. The lower end portions (6) and (6) of the opening of (1) are bent inward and firmly bonded to the inner surface joint portions (13) and (13). A required number of holding pieces (9) are formed on a part of the inner peripheral covering (8). A code | symbol (14) is the space part (14) provided between the side edge (2) and the outer periphery covering body (7).

  Next, what is shown in FIG. 4 shows a molded product main body (C) molded according to another embodiment of claim 3, and the inner peripheral cover (8) is fused to the entire inner peripheral portion, and the side ( 2) The gap between the holding pieces (9) and (9) facing the left and right sides of (2) becomes a wide gap (B), and the flange (12) into which the vehicle body panels (11) and (11) are inserted The state which becomes a fault that the clearance gap between holding piece (9) (9) becomes large is shown. (10) shows a hollow seal portion for sealing an opening / closing door, a trunk, and the like.

  The extruded product shown in FIG. 5 shows the embodiment shown in claim 4. The synthetic resin core material (1) having a substantially U-shaped cross section has an outer peripheral covering (7) made of a soft synthetic resin on the entire outer peripheral portion. The outer periphery covering body (7) is entirely or partially fused, and the inner periphery of the synthetic resin core material (1) has the entire inner periphery portion or the synthetic resin core material (1). The inner peripheral covering (8) made of a soft synthetic resin is fused to the inner surface joint portions (13) (13) inside the lower ends of the opposite side sides (2) and (2), and one of the side sides (2) A holding piece (9) for pressure contact is integrally formed on the inner peripheral cover (8), and the inner peripheral cover (8) on the other side (2) is formed outside the inner peripheral portion. An extended inner peripheral pushing portion (16) is formed, and holding pieces (9) (9) made of various shapes for press contact according to the required number are integrally formed at predetermined positions on the outer periphery of the inner circumferential pushing portion (16). Suddenly It is formed.

  Next, what is shown in FIG. 6 shows a state when the state shown in FIG. 5 is attached to the flange (12) of each opening of the vehicle body or the like. A space (14) in a substantially contact state is formed between the side (2) and a narrow gap (A) is naturally formed between the holding pieces (9) and (9) at different positions. The flange (12) can be firmly supported. Reference numeral (15) denotes a cosmetic lip.

  Furthermore, what is shown in FIG. 7 is that of the embodiment shown in claim 5, and the synthetic resin core material (1) covers the outer peripheral covering (7) made of a soft synthetic resin over the entire outer peripheral portion, The entire outer peripheral part or part of the covering (7) is fused, and the entire inner peripheral part or the opposite side (2) of the synthetic resin core (1) is placed inside the synthetic resin core (1). The inner peripheral cover (8) made of a soft synthetic resin is fused to the inner surface joint (13) (13) inside the lower end of (2), and the left and right sides of the opposite sides (2) (2) are The inner peripheral cover (8) is formed with a curved inner peripheral pushing portion (16) that extends to the outside of the inner peripheral portion and connects both the left and right sides. One or a plurality of holding pieces (9) and (9) for press contact are integrally formed at predetermined positions. The code | symbol (15) shows the makeup | decoration lip provided in the outer periphery of the outer periphery covering body (7).

  Further, in the case shown in FIG. 8, the inner peripheral cover (8) formed to project outside in FIG. 7 is pushed into the synthetic resin core (1) and the bonding surface does not adhere to the space portion (14 The other example which coat | covered the inner surface side of this synthetic resin core material (1) so that a) may be provided is shown. Reference numeral (10) indicates a hollow seal portion mounted at a required position of the outer peripheral covering (7).

  Next, what is shown in FIG. 9 is an embodiment showing the usage state of claim 1 in which the synthetic resin core material (1) inserted into the molded product main body (C) is bent upward. The cut recesses (3) and (3) are alternately formed alternately from the sides (2) and (2) to the upper head (5). In addition, this synthetic resin core material (1) is easily bent forward and backward.

  Further, what is shown in FIG. 10 shows the synthetic resin core material (1) according to claim 2, and is cut from the opposite side (2) (2) to the upper head (5). The ridges (4) and (4) are alternately positioned alternately and alternately. And it can also change easily also in the state before and behind the synthetic resin core material (1), and the upward bending state.

  FIG. 11 shows a core material (18) accommodated in a conventionally used molded product body (C), in which a hard synthetic resin is formed in a substantially U-shaped cross section, and a connecting portion ( In the state where 19) is provided, the cut portions (20) and (20) are formed at the same interval with respect to the opposite sides. The molded product body (C) using the core material (18) in this case has a drawback that it can be bent freely, but cannot be bent upward.

  Next, an embodiment of the process of the extrusion molded product according to the present invention will be described with reference to FIG. 12. The first extrusion die (21) injected with a hard synthetic resin is passing through the inside of the first mold die (22). The synthetic resin core material (1) having a U-shaped cross section formed into a cross-section (2) and a head (5) are opposed to each other by a punching machine (24) after passing through the cooling bath (23). The cut recesses (3) or notches (4) of various shapes are alternately punched and formed continuously or discontinuously. After that, it enters the second mold die (26), and the outer periphery covering body (7) and the inner periphery of the outer periphery of the substantially U-shaped section are entirely or partially by the soft synthetic resin injected into the second extrusion molding machine (25). The inner peripheral cover (8) is fused in whole or in part with a soft soft synthetic resin. Further, the inner peripheral pushing portion (16) is extended to the outside, and the required number of holding pieces (9) and (9) protruding to the outer periphery of the inner circumferential pushing portion (16) are integrally extruded and cooled. It is sent out through the tank (27).

  FIG. 13 shows another embodiment of the molded product body (C) in which a part of the thickness of the side (2) of the synthetic resin core material (1) having a substantially U-shaped cross section is thinned.

Next, the materials used in the present invention will be described. As the hard synthetic resin forming the synthetic resin core material (1) having a substantially U-shaped cross section, olefin resins such as polypropylene and polyethylene, styrene resins, and nylon resins are used. , Increase the rigidity and heat resistance of the hard synthetic resin that forms the synthetic resin core (1) by mixing polyester resin, polycarbonate resin or the like or inorganic powder such as talc, mica, glass fiber etc. with those resins, The linear expansion may be reduced.
Furthermore, as the soft synthetic resin of the outer periphery covering body (7) and inner periphery covering body (8) used for the outer periphery and inner periphery, olefin-based thermoplastic elastomer, styrene-based thermoplastic elastomer, etc., or their foams are used. The hardness is preferably 90 or less (JIS K7215 A hardness).
Further, the soft synthetic resin forming the holding piece (9) provided on the outer periphery of the inner peripheral cover (8) is also extruded by using the same material as the inner peripheral cover (7) and (8). When changing the hardness and type of the material according to the required function and quality of the method of manufacturing with a molding machine and the inner periphery covering body (8) and the holding piece (9) (9) for press contact, Further, polymerization extrusion molding may be performed inside the second mold die (26) by a third extrusion molding machine.

  It is the slope figure which formed the excavation recessed part of the synthetic resin core material of the cross-section substantially U shape of this invention.   It is the perspective view which similarly formed the notch | incision of the synthetic resin core material of this invention.   It is sectional drawing which formed the clearance gap in a part of outer periphery covering body of the synthetic resin core material of this invention, and adhered a part of inner periphery covering body.   FIG. 5 is a cross-sectional view showing another example, which is attached to a panel having a cover on the outer periphery and inner periphery of a synthetic resin core material.   FIG. 4 is a cross-sectional view of a state in which a part of the inner peripheral covering is fused to the inner lower end of the synthetic resin core material of the present invention and an inner peripheral pushing portion is extended to the outside.   It is sectional drawing of the state which similarly pushed in the inner peripheral pushing part shown in FIG. 5 of this invention inside.   It is sectional drawing of the state which extended the inner peripheral pushing part outside from the side of both the left and right sides of the synthetic resin core material of this invention, and connected both left and right sides.   FIG. 8 is a partially cut-out perspective view of the inner peripheral pushing portion shown in FIG. 7 of the present invention pushed into a synthetic resin core material.   It is a perspective view of the bent state of the synthetic resin core material of the present invention.   It is the top view which a part of other synthetic resin core material of this invention lacked.   It is a perspective view which shows the core material made from a synthetic resin of the prior art.   It is a side view which shows the manufacturing process of the extrusion molded product of this invention.   The other example of this invention is shown and it is sectional drawing which made thin part of the side of a synthetic resin core material.

Explanation of symbols

C molded product main body 1 synthetic resin core material 2 side 3 cut recess 4 notch 5 head 6 lower end 7 outer peripheral cover 8 inner peripheral cover 9 holding piece 10 hollow seal part 11 body panel 12 flange 13 inner surface joint 14 Space part 15 Makeup lip 16 Inner peripheral pushing part 18 Core material 21 First extrusion molding machine 22 First mold die 23 Cooling tank 24 Punching machine 25 Second extrusion molding machine 26 Second mold die A Narrow gap part B Wide gap Part 27 Cooling tank

Claims (5)

  In a synthetic resin core material of a molded product used for various openings of an automobile, the synthetic resin core material is molded in a longitudinal direction with a substantially U-shaped cross section, and the synthetic resin core material has an opposite side and an upper head. A cut-out recess is formed on one of the side sides with a predetermined interval toward the head, and a predetermined interval toward the head is formed on the other side of the opposite side. A synthetic resin core for a molded product used for each opening of an automobile, characterized in that continuous or discontinuous cut recesses are formed alternately with the cut recesses provided on one side. Wood.   In a synthetic resin core material of a molded product used for each opening of an automobile, the synthetic resin core material is molded in a longitudinal direction with a substantially U-shaped cross section, and the synthetic resin core material has an opposite side and an upper head. And forming a notch on one of the side sides with a predetermined interval toward the head, and providing a predetermined interval on the other side of the opposite side toward the head. A synthetic resin core material for a molded product used for each opening of an automobile, wherein continuous or discontinuous cuts are formed alternately with the cuts provided on one side. .   The synthetic resin core material according to claim 1 and claim 2 covers an outer peripheral covering made of a soft synthetic resin over the entire outer peripheral portion, and the entire outer peripheral portion or a part thereof is fused to the inner peripheral portion of the synthetic resin core material. Fusing an inner peripheral covering made of a soft synthetic resin to the entire inner peripheral portion or the inner surface joint portion inside the lower end of the opposite side of the synthetic resin core material, The extruded product of the synthetic resin core material according to claim 1 or 2, wherein the holding piece is integrally formed so as to protrude from one side or both right and left sides of the side.   The synthetic resin core material according to claim 1 and claim 2 covers an outer peripheral covering made of a soft synthetic resin over the entire outer peripheral portion, and the entire outer peripheral portion or a part thereof is fused to the inner peripheral portion of the synthetic resin core material. Fusing an inner peripheral covering made of a soft synthetic resin to the entire inner peripheral portion or an inner surface joining portion inside the lower end of the opposite side of the synthetic resin core material, and the inner peripheral covering on one side Is formed with an inner peripheral pushing portion that extends to the outside of the inner peripheral portion, and an outer periphery of the inner peripheral pushing portion. 3. A synthetic resin core extruded product according to claim 1 and 2, wherein a holding piece for press contact is integrally formed on the base plate.   The synthetic resin core material according to claim 1 and claim 2 covers an outer peripheral covering made of a soft synthetic resin over the entire outer peripheral portion, and the entire outer peripheral portion or a part thereof is fused to the inner peripheral portion of the synthetic resin core material. Fusing an inner periphery covering made of a soft synthetic resin to the entire inner peripheral part or the inner surface joint part inside the lower end of the opposite side of the synthetic resin core material, The circumferential covering body is formed with a curved inner peripheral pushing portion that extends to the outside of the inner circumferential portion and connects both the left and right sides, and one or more holding pieces for press contact at predetermined positions on the outer circumference of the inner circumferential pushing portion The extruded product of the synthetic resin core material according to claim 1 or 2, characterized in that is integrally projected.

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