KR20190033788A - manufacturing method of weather strip for bumper and weather strip prepared therefrom - Google Patents

Abstract

The present invention relates to a manufacturing method of a weather strip for an exterior bumper and a weather strip prepared therefrom and, more specifically, provides a manufacturing method of a weather strip through an injection process of an injection machine, and a weather strip molded article in which internal and external members and a clip are integrated through the method.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a weather strip for a bumper,

The present invention relates to a method for manufacturing a weather strip for an external bumper and a weather strip manufactured therefrom, and more particularly, to a method for making a weather strip through a single injection process, .

Weather strips for automobiles, also called automotive window frame rubber, are mounted on automobile bodies, doors and the like to provide sealability against leakage of internal and external parts of the vehicle body, external noise and dust, It is a functional product of automobiles that prevents the shaking of the glass and gives the comfort and comfort of the automobile by giving the buffering effect of the body.

The weather strips mounted on automobiles have been manufactured by applying ethylene propylene diene monomer rubber and have been designed and developed for various types of weather strips in consideration of elastic restoring force and sealing properties unique to rubber. Has been generalized.

In recent years, however, there is a growing demand for new technologies and new materials development for the purpose of customer's various emotional demands, upgrading, environment friendliness, and light weight.

1 shows a case in which a weather strip is applied. As shown in FIG. 1, a weather strip can be installed between a front bumper and a hood panel of an automobile. In addition to the appearance weather resistance and wear resistance effect, It is used for the purpose of blocking the gap and is used as a thin and long shape material of the rubber system.

The manufacturing process of the weather strip is generally performed by a 10-step process from the extrusion of the line to the molding portion coating, and is carried out by the manual work of the workers at each step, thereby reducing the productivity of the weather strip product and raising the cost Has continued.

The process for manufacturing such a weather strip is described in more detail in the following processes: line extrusion, spray coating, pore cutting, hole processing, slitting, end piece forming, molding part removal, burr removal, clip assembly, .

Line extrusion is a process for extruding a weather strip through a line extruder. Spray coating is a process for spraying a coating agent on the surface of a weather strip for the purpose of removing the streaks on the surface during the extrusion of the weather strip The hole cutting process is a process of perforating holes of a predetermined size into a sharp hole over the length of the cut weather strip, Is a process for forming a plurality of narrow gaps across the length of the weather strip. End-piece molding is a process for forming both ends of the weather strip using a molding machine. And the deburring is a step for finishing the weather strip. And removing the remaining excess burrs (burrs) by using a cutter or the like. The clip assembly is a process of inserting the clip into the holes formed in the weather strip through the hole machining, Is coated with a coating agent.

The weather strip produced through the manufacturing process of such a weather strip has a soft outer portion composed of a silicone coating and an EPDM sponge as shown in FIG. 2, a hard inner portion composed of an EPDM solid, and a clip And there is also an inconvenience of assembling the clip in which the clip is fitted to the hole.

As described above, since the conventional manufacturing process of the weather strip requires 10 steps, the time required for manufacturing the weather strip is inevitably excessive, and the cost is incurred due to the various processes, so that the production cost of the weather strip .

In addition, there are additional problems in mounting the extruded weather strip on the vehicle flange. When the weather strip is installed between the front bumper of the vehicle and the hood panel, a tool such as a hammer is used by the operator, Strip mounting can be accomplished, but the operator relies on his professional and empirical knowledge, without relying on objective grounds to ensure that the weather strip is properly and precisely installed.

In other words, it can not be notified or feedbacked to the operator that the weather strip is properly installed between the front bumper and the weather strip of the vehicle, and furthermore, it can not be confirmed whether the proper installation of such weather strip is equally installed in the next vehicle Therefore, it is inevitable to increase the defectiveness of the weather strip installation.

Such a failure of the weather strip installation can lead to problems such as the inflow of outside wind or rainwater into the gap between the front bumper of the vehicle and the hood panel, which may be a cause of dissatisfaction with the customer who purchases the vehicle.

In other words, since the manufacturing process of the weather strip in the past has to undergo a 10-step process through the extrusion process as described above, the product rate of the weather strip with the accurate size specification is inevitably lowered. As a result, The buyer purchases the weather strip from the customer who purchased it.

Therefore, there is a need for a weather strip manufacturing process which can reduce the manufacturing cost, has excellent design change capability, and can objectively determine the correct installation of the weather strip to the operator.

Moreover, the manufacturing process of the weather strip is drastically reduced, and the productivity of the weather strip is greatly improved, and a need also exists for a weather strip to be commercialized in an accurate size standard.

On the other hand, the patent documents disclosed in the following prior art documents disclose techniques relating to the manufacture of weather strips.

Patent Document 001: Registration No. 10-0877285 Patent Document 002: Published Patent No. 10-2016-0128193 Patent Document 003: Registration No. 10-1761809 Patent Document 004: Registration No. 10-1676323

The present invention for solving the above-mentioned problems is to provide a method for manufacturing a weather strip for an external bumper and a weather strip manufactured therefrom, in order to increase the productivity of the weather strip and increase profitability of the weather strip according to the reduction of the manufacturing process of the weather strip, The purpose is to provide.

In order to achieve the above-mentioned objects, the present invention is an example of a method for manufacturing a weather strip for an external bumper in which a weather strip is manufactured through an injection process of an injection machine.

Wherein the weather strip is made of a hard material and has a curved surface to have a hollow shape therein and has an outer member having a blade extending to one side and a curved surface extending from the outer member to complete the hollow shape And a clip extending from the inner member and formed in a combination of a step and a top shape so that the inner member and the clip can be fastened in a structure in which the inner member and the clip can be engaged with each other, wherein the outer member and the inner member and the clip are integrally formed The manufacturing method of the weather strip to be manufactured has an exemplary feature.

The composition of the first casting corresponding to the outer member is 50 to 60% by weight of TPV (thermoplastic rubber vulcanized), 20 to 25% by weight of polypropylene, 5 to 10% of high viscosity paraffin oil, 4 to 8% To about 6 wt%, a peroxide crosslinking agent 0.7 to 0.9 wt%, an antioxidant 0.3 to 0.5 wt%, and other additives 0.3 to 0.5 wt%, the composition of the second casting corresponding to the inner member 55 to 65% by weight of thermoplastic rubber vulcanized (TPV), 15 to 20% by weight of polypropylene, 5 to 10% of highly viscous paraffin oil, 4 to 8% of nickel alloy, 3 to 6% of inorganic filler, 0.7 to 0.9 of peroxide crosslinking agent 0.3 to 0.5% by weight of an antioxidant, and 0.3 to 0.5% by weight of an additive. The composition of the third casting corresponding to the clip is composed of 65 to 70% by weight of carbon fiber and 30 to 35% by weight of titanium % By weight based on the total weight of the composition. All.

Wherein the nickel alloy is a nickel alloy containing 73 to 75% by weight of nickel as a main component, 15 to 17% by weight of chromium, 6 to 7% by weight of iron, 2.5 to 3.5% by weight of titanium, 0.7 to 1% And a heat-resisting alloy which comply with the content of silicon added thereto.

The weather strip for an external bumper manufactured by the above-described manufacturing methods has an exemplary feature.

The outer member of the weather strip has an exemplary feature as a weather strip for an external bumper having a plurality of embossments formed on its outer surface.

As described above, according to the present invention, since the weather strip is manufactured through one injection process, it is expected that the profitability of the weather strip due to the reduction of the manufacturing process and the elimination of the hardware assembly process can be improved, The time required for manufacturing the weather strip according to the reduction of the process can be drastically reduced and the appearance can be improved by applying the emboss to the appearance of the weather strip.

Further, according to the present invention, it is possible to remarkably reduce the defective rate of the weather strip molded article as well as to have excellent corrosion resistance, wear resistance (including weather resistance performance), moldability and durability of the weather strip.

In addition, according to the present invention, the defect rate of the weather strip molded article is reduced, accuracy in installation of the weather strip molded article mounted between the front bumper and the hood panel of the vehicle can be ensured, and reliability can be secured from the customers of the automobile.

1 is a view showing an application example of a weather strip installed between a front bumper and a hood panel of an automobile.
2 is a view showing a structure of a weather strip manufactured through a conventional weather strip manufacturing process;
3 is a cross-sectional view of the weather strip shown cut away from the structure of the weather strip shown in Fig. 2;
4 is a perspective view showing a structure of a weather strip for an external bumper manufactured through the weather strip manufacturing process of the present invention.
Fig. 5 is a cross-sectional view of the weather strip shown cut away from the structure of the weather strip shown in Fig. 4; Fig.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. And it should be interpreted based on the technical ideas throughout the specification taking into consideration that various modifications are made.

Hereinafter, a method of manufacturing a weather strip for an external bumper according to a preferred embodiment of the present invention will be described in more detail with reference to the accompanying drawings.

Prior to the description of the present invention, it is noted that the mold structure of the injection molding machine in the injection process required for producing the weather strip of the present invention is not shown in the drawing.

The method for manufacturing a weather strip for an external bumper in the present invention is characterized in that a weather strip for an external bumper is manufactured through one injection step. Unlike extrusion, injection means a process of taking out a weather strip through a mold of an injection molding machine. The weather strip manufactured through such an injection process has an advantage that it can be produced according to a precise standard.

The weather strip 100 may comprise an outer member 110 and an inner member 120 and a clip 130. The outer member 110 and the inner member 120 and the clip 130 may be formed by an injection process Can be integrated.

The weather strip 100 manufactured by the method of manufacturing a weather strip for an external bumper according to the present invention is composed of an inner member 120 made of soft and an outer member 110 made of hard material for absorbing impact, , The outer member 110 is formed with a silicone coating layer for weathering resistance and wear resistance.

The weather strip 100 according to the present invention is installed between the bumper and the hood to prevent the entry of clearance wind or rainwater from the outside.

Since the weather strip 100 is manufactured through one injection process, it is expected that the profitability of the weather strip 100 due to the reduction of the manufacturing process and the elimination of the hardware assembly process can be improved, The time required for manufacturing the weather strip can be drastically reduced and the appearance of the embroidery 110a can be improved by applying the emboss 110a to the outer surface of the weather strip 100, . In other words, the process of coating can be reduced by mixing silicone oil with raw materials.

The weather strip 100 is a structure manufactured through molding, and may be a structure that is molded by a single injection or a double injection, but is not limited to such injection. The structure of the weather strip 100 is not deformed from the mold until the casting is reflected and at least cured, and the casting reflected for the structure of the weather strip 100 is injected into the casting molds 1, 2, And held in the mold until sufficiently cured.

Here, the first casting may be hardened to be a hard outer member 110, the second casting may be hardened to be a soft inner member 120, and the third casting may be cured to form a clip When the first, second and third castings are hardened and demolded in the casting mold, the outer member 110, the inner member 120, and the clip 130 corresponding to the first, The structure of the weather strip 100 can be manufactured as a single molded product that is integrated with each other.

As shown in FIG. 5, which is a cross-sectional view of the structure of the weather strip 100, the outer member 110 has a round shape so that a hollow 110a can be formed therein, and a blade (not shown) 110b are formed.

Meanwhile, the inner member 120 is integrated with the outer member 110 and formed into a curved surface to complete the shape of the hollow 110a, while the clip 130 is integral with the inner member 120 And can be formed in a combination of a step 130a and a top 130b which can be fastened while being inserted.

Here, the first casting corresponding to the outer member 110 may be made of a hard rigid thermoplastic material, and the second casting corresponding to the inner member 120 may be easily deflected or adapted Which is a less rigid material.

As described above, the weather strip 100, which is a single molded product integrally formed with the outer member 110, the inner member 120 and the clip 130, is formed by injecting the first, second, and third castings into the mold at once, The inner member 120 and the clip 130 are combined with each other so that the outer member 110 corresponding to the first, second, and third castings can be molded, .

These features can drastically reduce the process compared to the extrusion process of the prior art and further improve the accuracy and clean appearance of the weather strip 100 standard corresponding to the molding.

The present invention has been described in terms of suitable embodiments. Obviously, other changes or alternatives may occur by reading and understanding the present specification. The present invention is not limited to the structure of the weather strip as will be appreciated by those skilled in the art, and it should include a variety of modified structures in accordance with the specification and structure of the vehicle.

In the meantime, in the weather strip manufactured by the injection process through the mold of the injection machine, the clip 130 is used for being fastened between the front bumper and the hood panel unlike the outer member 110 and the inner member 120 The composition of the first and second castings corresponding to the outer member and the inner member described above may be applied and will be described later.

The composition of the first casting corresponding to the outer member 110 is 50 to 60% by weight of thermoplastic rubber vulcanized (TPV), 20 to 25% by weight of polypropylene, 5 to 10% of high viscosity paraffin oil, 4 to 8% 3 to 6% by weight of an inorganic filler, 0.7 to 0.9% by weight of a peroxide crosslinking agent, 0.3 to 0.5% by weight of an antioxidant and 0.3 to 0.5% by weight of an additive.

When the TPV (Thermoplastic Rubber Vulcanized) is less than 50% by weight, the elasticity of the product is lowered and the durability is lowered. When the TPV is more than 60% by weight, the product is prevented from being lightened.

When the amount of polypropylene is less than 20% by weight, surface cracking occurs during injection molding, which is difficult to mold. When the amount of polypropylene is more than 25% by weight, it is difficult to mount a weather strip due to an increase in hardness of the finished product.

High viscosity paraffin oil promotes processability in the production of thermoplastic elastomers and promotes dispersion of carbon black or pigment and filler filler. Further, it serves to decrease the hardness of the thermoplastic elastomer and to increase plasticity and moldability. When the viscosity of the composition of the present invention is less than 5% by weight, flowability during injection molding is poor, which leads to molding defects and work defects. When the viscosity of the composition is more than 10% by weight, Injection molding It takes a lot of defective shape and cooling time.

The inorganic filler is used to lower the role of the filler and the cost of the material. When the content is less than 3% by weight, the material cost increases and the filler does not play a role. When the content is more than 6% by weight, The extrusion molding operation becomes difficult. As the inorganic filler used in the present invention, a product having a particle size of 10 탆 or less and a whiteness of 95% or more is preferably used, and calcium carbonate is particularly preferably used.

The peroxide crosslinking agent serves to crosslink the rubber portion so as to exhibit the physical properties of the thermoplastic elastomer. The thermoplastic elastomer material is prepared so as to have a rubber-like viscosity and elasticity property by dynamically crosslinking by adding a cross-linking agent and cross-linking agent by using a twin screw injector in order to basically cross-link the rubber segment which is a soft segment. In the case of the crosslinking agent for the crosslinking of the thermoplastic elastomer, a phenolic resin crosslinking agent, a peroxide crosslinking agent and a silane crosslinking agent are mainly used. In the case of a phenolic resin crosslinking agent, a chemical substance sensitive to moisture causes problems due to moisture absorption in summer, Since the problems due to moisture absorption are small, the peroxide crosslinking agent is used in the present invention.

When the peroxide crosslinking agent is less than 0.7% by weight, crosslinking is not sufficiently performed, and the physical properties and elastic properties of the article are lowered. When the peroxide crosslinking agent is more than 0.9% by weight, crosslinking occurs too much, ) May be observed, which may cause poor moldability.

The thermoplastic elastomer material is produced by dynamic crosslinking using a twin screw injector, in which case a processing temperature of 200 ° C or higher and a high shear force are generated. At this time, an antioxidant is used for the purpose of preventing oxidation of the rubber portion of the soft segment among the thermoplastic elastomer materials. In the case of finished products, antioxidants are used to prevent thermal decomposition.

When the content of the antioxidant is less than 0.3% by weight, the physical properties of the composition deteriorate and the performance of the finished product deteriorates over a long period of use. When the content of the antioxidant exceeds 0.5% by weight, ) Problems.

The other additives are preferably, but not limited to, polypropylene waxes in order to improve the surface slip property and wear resistance of the weather strip product.

The nickel alloy is contained in the composition of the first casting corresponding to the outer member 110 of the present invention. When the nickel alloy is less than 4% by weight, the heat resistance and the abrasion of the product are lowered, If it is more than 8% by weight, the elasticity of the product may be lowered.

Here, the nickel alloy may be composed of 73 to 75% by weight of nickel, 15 to 17% by weight of chromium, 6 to 7% by weight of iron, 2.5 to 3.5% by weight of titanium, 0.7 to 1% And a heat-resistant alloy which is in compliance with the content of silicon added thereto, the effect in the range of 4 to 8 wt% is achieved.

The composition of the second casting corresponding to the inner member 120 is 55 to 65% by weight of thermoplastic rubber vulcanized (TPV), 15 to 20% by weight of polypropylene, 5 to 10% of high viscosity paraffin oil, 4 to 8 % Of an inorganic filler, 3 to 6 wt% of an inorganic filler, 0.7 to 0.9 wt% of a peroxide crosslinking agent, 0.3 to 0.5 wt% of an antioxidant, and 0.3 to 0.5 wt% of an additive.

The composition of the second casting is similar to the reasons for the composition content of the first casting being not exceeding or exceeding the range of the composition of the first casting, Is that the weight percent range of TPV and polypropylene is different from the weight percent range of TPV and polypropylene as a composition of the first casting, which means that the inner member corresponding to the second casting is in the outer side corresponding to the first casting It means that it is soft compared to the member.

The composition of the third casting corresponding to the clip 130 is composed of 65 to 70% by weight of carbon fiber and 30 to 35% by weight of titanium. The mixture of carbon fiber and titanium is mixed with the clip 130, This is because it is necessary to maintain firmness together with flexibility as it is used for fastening.

If the carbon fiber content is less than 65 wt%, the flexibility may be deteriorated. If the carbon fiber content is more than 70 wt%, the toughness may deteriorate. If the carbon fiber content is less than 30 wt%, the toughness is deteriorated. , These carbon fibers and titanium may be mixed with each other in the above-mentioned weight percent range to become a third cast, thereby constituting the hardened clip 130.

The automotive weather strip according to the present invention can be limited to a process of injection molding.

In the general manufacturing process, the weather strip is manufactured by using the extrusion molding method. Since the conventional weather strip manufactured by the extrusion molding method is made of ethylene propylene diene monomer (EPDM) rubber, the property for the elasticity of the product is secured The vulcanization process is necessarily required and there is a problem in that the efficiency of the vulcanization for a long time in the extrusion molding operation is remarkably reduced, and the defective molding rate of the product is high due to various processes, and the heat resistance and abrasion resistance are relatively weak There are disadvantages.

On the other hand, since the weather strip of the present invention is manufactured using TPV through one injection molding process, the product can be produced by desizing it directly from the mold of the injection molding machine without the need of a separate compounding and vulcanization process. It is possible to shorten the working time, to increase the work efficiency, to reduce the cost, to handle easily, to recycle the defective molded product, and to provide environmental protection and cost saving.

Compositions for the first castings of the weather strip outer members of Comparative Examples 1 to 3 and Examples 1 to 2 in the following Examples were prepared.

Example 1) Preparation of Comparative Examples 1 to 3 and Examples 1 to 2

Comparative Example 1 is composed of 65 wt% of EPDM, 23.5 wt% of polypropylene, 7 wt% of high viscosity paraffin oil, 0.8 wt% of peroxide crosslinking agent, 0.3 wt% of antioxidant, 3 wt% of inorganic filler, and 0.4 wt% of other additives , Comparative Example 2 was composed of 55 wt% of EPDM, 33.5 wt% of polypropylene, 7 wt% of high viscosity paraffin oil, 0.8 wt% of peroxide crosslinking agent, 0.3 wt% of antioxidant, 3 wt% of inorganic filler and 0.4 wt% And Comparative Example 3 was prepared in the same manner as in Comparative Example 3 except that 65 wt% of EPDM, 23 wt% of polypropylene, 5 wt% of high viscosity paraffin oil, 1.0 wt% of peroxide crosslinking agent, 0.5 wt% of an antioxidant, 5 wt% .

Example 1 was prepared in the same manner as in Example 1 except that TPV 56.5 wt%, polypropylene 22.5 wt%, high viscosity paraffin oil 9.5 wt%, nickel alloy 4 wt%, peroxide crosslinking agent 0.8 wt%, antioxidant 0.4 wt%, inorganic filler 6 wt% 0.3 wt.%. In Example 2, TPV 53 wt%, polypropylene 22.5 wt%, nickel alloy 8 wt%, high viscosity paraffin oil 8.6 wt%, peroxide crosslinking agent 0.9 wt%, antioxidant 0.5 wt% 6% by weight, and 0.5% by weight of other additives.

Test 1) Evaluation of Product Properties of Comparative Examples 1 to 3 and Examples 1 to 2

The basic properties, heat resistance, corrosion resistance, abrasion resistance, moldability and weatherability of the outer member (110) of the weather strips of Comparative Examples 1 to 3 and Examples 1 and 2 prepared in the above were evaluated.

Specifically, the physical properties after heat treatment at 120 deg. C for 70 hours were measured. The abrasion resistance should be interpreted to include the weathering performance. The abrasion resistance is 100 hours after the ozone concentration is 50 pphm, the air temperature is 40 ° C, the air velocity is 45 m / s including the fine particles, And the weather resistance performance through cracks was confirmed. The results were evaluated as very good (?), Good (?), Moderate (?), And poor (x). In addition, the durability test was conducted to evaluate whether the product was ruptured after 1,000 times of abrasion evaluation of the finished product.

division
Basic Properties Heat resistance property causticity
Abrasion resistance (weather resistance)
Formability
Endurance evaluation
Hardness

Seal
burglar Fracture
Elongation Tear
burglar Hardness
Rate of change
Seal
burglar
Rate of change Elongation
Rate of change Comparative Example 1 73 78 470 32 +3 -11 -15 +2 ○ ○ NG Comparative Example 2 71 69 410 29 +2 -8 -9 +4 × × NG Comparative Example 3 78 65 410 34 +2 -5 -8 +3 ○ × NG Example 1 70 75 430 29 +1 -6 -10 +3 ◎ ◎ OK Example 2 72 78 410 28 +1 -5 -9 +8 ◎ △ OK

As can be seen from Table 1, Examples 1 and 2 according to the present invention are particularly excellent in corrosion resistance, abrasion resistance (including weather resistance performance), moldability, and durability. This can be understood as a factor that the nickel alloy is contained in the composition of the first casting of the present invention.

As can be seen from Table 1, the weather strips manufactured by the method of manufacturing weather strips for external bumpers according to the present invention can be produced by applying the compositions of castings 1, 2 and 3 to the injection process, (Including weather resistance performance), moldability and durability, as well as the time and cost reduction due to the dramatic reduction of the manufacturing process, productivity and profitability can be expected, and the defect rate of weather strip products Can be significantly lowered.

The weather strip (100)
The outer member 110 inner member 120,
The clip (130)

Claims (6)

Wherein the weather strip is manufactured through an injection process of an injection machine. The method according to claim 1,
The weather strip
An outer member made of a hard material and formed into a curved surface so as to have a hollow shape therein and having a blade extending to one side;
An inner member which is made of soft material and extends from the outer member and is formed into a curved surface to complete the hollow shape; And
A clip extending from the inner member and formed in a combination of a step and a top shape so as to be fastened in a latchable structure;
Wherein the outer member, the inner member, and the clip are assembled together to form an integral body. 3. The method of claim 2,
The composition of the first casting corresponding to the outer member is 50 to 60% by weight of TPV (thermoplastic rubber vulcanized), 20 to 25% by weight of polypropylene, 5 to 10% of high viscosity paraffin oil, 4 to 8% To 6% by weight of a peroxide crosslinking agent, 0.7 to 0.9% by weight of a peroxide crosslinking agent, 0.3 to 0.5% by weight of an antioxidant, and 0.3 to 0.5% by weight of an additive;
The composition of the second casting corresponding to the inner member 120 is 55 to 65% by weight of thermoplastic rubber vulcanized (TPV), 15 to 20% by weight of polypropylene, 5 to 10% of high viscosity paraffin oil, 4 to 8% A composition comprising 3 to 6% by weight of an inorganic filler, 0.7 to 0.9% by weight of a peroxide crosslinking agent, 0.3 to 0.5% by weight of an antioxidant and 0.3 to 0.5% by weight of an additive,
Wherein the composition of the third casting corresponding to the clip is composed of a composition containing 65 to 70% by weight of carbon fiber and 30 to 35% by weight of titanium. The method of claim 3,
Wherein the nickel alloy is a nickel alloy containing 73 to 75% by weight of nickel as a main component, 15 to 17% by weight of chromium, 6 to 7% by weight of iron, 2.5 to 3.5% by weight of titanium, 0.7 to 1% And a heat-resisting alloy which comply with the content of silicon added to the weather strip. A weather strip for an external bumper manufactured by any one of claims 1 to 4. 6. The method of claim 5,
Wherein the outer member of the weather strip has a plurality of embossings formed on the outer surface thereof.

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