JPH0661546U - Automotive weather strip - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] Thin protection with a rough surface between the door and trunk panel of a vehicle such as an automobile, which has good smoothness and low frictional resistance with the body panel that receives it. It is a weather strip formed by integrally extruding a coating on the outer peripheral surface of a core. [Structure] A weather strip 1 is integrally coated with a foam core 2 and a thin protective coating 3 on the outer periphery by means of an extrusion molding machine, and the core material is made of a thermoplastic elastomer foam of polyolefin resin. The thin protective coating has a thickness of 0.05 mm or less, and a synthetic resin of polyolefin resin or urethane resin compatible with the core is used as a base material, Various large and small powders having a higher melting point, synthetic resins of particles or powders of various sizes of mica, molybdenum, graphite and the like, and materials of particles are mixed and extruded and integrally polymerized and deposited.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a weather strip for a self-propelled vehicle, which is stably interposed between a door and a body panel that receives open / close portions of a trunk panel in a vehicle such as an automobile, and serves as a seal.

[0002]

[Prior art]

 Generally, the weather strips that seal the opening and closing parts of various panels such as door panels, glass panels, and trunk panels of this type use foams of various rubbers for their elastic parts. Further, in recent years, a foamed synthetic resin of a thermoplastic elastomer, which has a specific gravity of about 30% lighter than rubber, is recyclable, and has excellent airtightness, is used. However, although this thermoplastic elastomer is excellent in terms of cushioning the body panel, it has the drawback that it is easily rubbed and scratched even by the light vibration during separation during opening and closing. Therefore, the one in which a synthetic resin paint such as urethane or nylon is applied is used on the surface of the portion where the weather strip is joined.

[0003]

[Problems to be solved by the device]

 In the former case of the rubber foam material among those mentioned in the prior art, the elasticity and cushioning function are sufficiently fulfilled, but the airtightness is weak, and damage is caused by scratches even when rubbed by light vibration. There is a drawback to Also, in the latter case of the foamed material of thermoplastic elastomer, the one in which urethane or nylon-based dissolved coating material is applied is very troublesome and troublesome in the application process, and depending on the position or curved portion. It is very difficult to apply, and there are drawbacks such as filling the rough surface that reduces the frictional resistance of the surface and increasing the separation resistance. The present invention solves each of the above points, and its purpose is to extrude a weather strip to integrally form a thin protective coating compatible with the core and The point is to firmly form a rough surface consisting of irregularities with low frictional resistance on the protective film.

[0004]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the weather strip of the present invention is formed by an inner core body (2) and a thin outer peripheral thin protective coating (3) having a thickness of 0.05 mm or less, and the constituent material of the core body (2). Is a foaming material of thermoplastic elastomer of polyolefin resin. Further, the thin protective coating (3) is used for a base material of a synthetic resin of a polyolefin resin or a urethane resin, and various kinds of powder or particles having a melting point higher than that of the base material. Rough surface such as unevenness is formed on the surface by extrusion molding of synthetic resin such as nylon, urethane, polystyrene. For the same purpose, powder or particles of mica, molybdenum, graphite, etc. with good lubricity are mixed inside the synthetic resin forming the thin protective film, and this is extruded to form a rough surface on the surface. To do.

[0005]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. FIGS. 1 to 4 show a usage state of the present invention. In FIGS. 1 and 2, a door panel (8) and a trunk panel of a vehicle (22) are shown. The weather strip body (1) that seals the opening and closing portions of (11) and the vehicle body panel (7) has various cross-sectional shapes, and a longitudinal core body (2) having a through hole formed therein. A thin protective coating (3) is integrally formed by an extrusion molding machine on the exposed surface or the entire outer periphery of the corresponding joint portion (5) of the core body (2). . The core body (2) is formed by extrusion molding a foamed material of thermoplastic elastomer of polyolefin resin into various cross-sectional shapes, and is provided with a hollow portion inside, and the body panel (7) or the lifting window. A joint portion (5) with which (9) and the like are pressed is formed. Next, a thin protective coating (3) having a thickness of 0.05 mm or less is applied to the surface of the joint portion (5) of the core body (2) with the vehicle body panel (7) by extrusion molding. To do. The thin protective coating (3) is made of a synthetic resin such as a polyolefin resin or a urethane resin that is compatible with the core body (2) as a base material. A mixture of polyolefin-based, nylon, urethane, and polystyrene-based synthetic resin materials consisting of powders or particles of various sizes with a higher melting point than this base material is mixed, and this is mixed with another extrusion molding machine to form a core. (2) Extrusion molding at the same time, passing through one mold die to integrally form both by heat and pressure, and the uneven surface made of a material having a high melting point on the surface of the thin protective coating (3). To form a rough surface. Further, the thin protective coating (3) is mixed with a powder or particles of mica, molybdenum, graphite or the like for extruding a synthetic resin such as a polyolefin resin or a urethane resin in order to improve lubricity. The surface is integrally attached using a molding machine. When the thickness of the thin protective coating (3) is set to 0.05 mm or less, the unevenness on the surface becomes small. That is, the pressure at the time of extrusion is applied to the surface to crush various powders and particles, which are the added mixed material, into small uneven surfaces on the surface of the thin protective film (3). Further, as the base material of the thin protective film (3), high molecular polyethylene such as polyolefin resin, polypropylene, various ethylene resins and urethane resin are used.

In the embodiment shown in FIG. 2, the weather strip main body (1) is interposed between the door panel (8) and the vehicle body panel (7) and is pressed against the vehicle body panel (7) to reduce the weight of opening and closing. It is a product that maintains airtightness and is toughened. (9) shows an elevating window, and (10) is a glass run for accommodating the elevating window (9). Next, as shown in FIG. 3, the weather strip main body (1) is obtained by sealing the joint (5) between the vehicle body panel (12) and the trunk panel (11), and the circular weather strip main body (1) is attached to the weather strip main body (1). It is attached to the vehicle body panel (12) through a mounting member (21). In the embodiment shown in FIG. 4, the weather strip main body (1) of the present invention is attached to the vehicle body panel (14) through a mounting metal fitting, and the thin edge is directly attached to the surface of the portion where the edge of the window (13) directly abuts. It shows a state in which the protective film (3) is located.

Next, FIG. 5 shows a conventional example, in which the surface of the pressure contact portion (16) of the weather strip (15) between the vehicle body panel (18) and the door panel (19) is made of urethane. , A nylon-based dissolved paint (17) was applied to protect the surface.

[0008]

[Action]

 The weather strip body of the present invention, which is configured as described above, is formed by molding a foamed material of thermoplastic elastomer of polyolefin resin into an extrusion molding machine to form a core body, and a thickness of 0.05 mm or less is formed on the surface or the outer periphery of the core body. Form a thin thin protective coating. This thin protective coating uses polyolefin-based resin or urethane-based resin as the base material, and has large or small powders or particles with a higher melting point than that of the base material, or mica, molybdenum, graphite, etc. inside the base material. Is added and mixed, charged into another extrusion molding machine, simultaneously extrusion-molded using two extrusion molding machines, and then polymerized inside one die. At this time, the foam material of the thermoplastic elastomer of the weather strip body is foamed, and at the same time, an uneven rough surface is formed on the surface of the thin protective coating of 0.05 mm or less on the surface.

[0009]

[Effect of device]

 As described above, according to the weather strip of the present invention, a thin protective coating with a thickness of 0.05 mm or less that covers the core body of the foam material is provided at the joint of the opening / closing press contact portion of the vehicle such as the door panel and the trunk panel of the vehicle. Since it is integrally attached, the whole structure is significantly tougher, and the frictional resistance is small and opening and closing operations are light. In addition, it has the effect of sufficiently protecting the surface of the core body, and it does not require secondary processing as in the case where the surface of the core body is coated with synthetic resin as in the past, and it is easily worn away. It has the effect that it can be used firmly for a long time without worrying about damage due to damage. The foamed material of the thermoplastic elastomer of polyolefin resin is used as the core of the weatherstrip body, and the thin protective coating applied to the outer peripheral surface is made of polyolefin resin or urethane resin, so that they are mutually compatible. Since it is soluble, it is polymerized and toughened integrally by heat and pressure at the time of extrusion, and it has the effect of preventing rough skin due to damage such as scratches. Further, since the thin protective film is formed to have a thickness of 0.05 mm or less, there is an effect that it can be applied without impairing the softness of the foamed part of the core body. Further, the thin protective coating is formed by mixing and extruding various kinds of large or small powders or particles of polyolefin-based or polystyrene-based having a higher melting point than that of the synthetic resin base material to form the powder or particles. It has the effect of being crushed into small irregularities by the pressure during extrusion to obtain a glossy surface and at the same time firmly forming a thin coating with fine irregularities. Furthermore, by mixing powder or particles of mica, molybdenum, graphite, etc. into the synthetic resin forming the thin protective coating and extruding this, the synthetic resin with a low melting point surely melts and does not melt. Each powder or particle is exposed on the surface to form a small uneven rough surface, which improves the lubricity and has the effect of significantly smoothing the opening / closing operation of a door or the like due to the low friction resistance. In addition, the weather strip of the present invention has a specific gravity that is 30% lighter than conventional ones that use a foamed rubber material as the core, and it is also recyclable, which is a convenient effect in line with the times. is there.

[Brief description of drawings]

FIG. 1 is a perspective view showing a state in which the present invention is used in a vehicle.

FIG. 2 is a vertical side view of FIG. 1A-A line similarly using the present invention.

FIG. 3 is a vertical cross-sectional side view of FIG. 1B-B also using the present invention.

FIG. 4 is a vertical sectional side view showing another example of use of the present invention.

FIG. 5 is a vertical cross-sectional side view showing a state in which a conventional weather strip is used.

[Explanation of symbols]

 1 Weather Strip 2 Core 3 Thin Protective Coating 5 Joint 7 Body Panel 8 Door Panel 9 Lift Window 11 Trunk Panel

Claims (2)

[Scope of utility model registration request] 1. A weather strip for sealing the opening and closing pressure contact portions of a door panel and a trunk panel of an automobile, wherein the weather strip body is formed by extruding an inner core body and a thin protective coating on the outer peripheral portion of the core body and polymerizing the core body. Is molded with a foamed material of a thermoplastic elastomer of polyolefin resin, and a thin protective coating of 0.05 mm or less is applied to the surface of the joint portion of the core body, and the thin protective coating is a polyolefin resin or A synthetic resin of urethane resin is used as a base material, and a polyolefin resin, nylon, urethane, or polystyrene synthetic resin composed of powder or particles of various sizes having a higher melting point than the base material is mixed,
An automobile weather strip characterized by being integrally formed by extrusion molding. 2. The weather strip for an automobile according to claim 1, wherein powder or particles of mica, molybdenum, graphite or the like is mixed in the synthetic resin forming the thin protective film.