KR101576154B1

KR101576154B1 - automobiles weather strip manufacturing method

Info

Publication number: KR101576154B1
Application number: KR1020150059682A
Authority: KR
Inventors: 김성술; 김형진; 김동의; 채천우
Original assignee: 주식회사 디엠씨
Priority date: 2015-04-28
Filing date: 2015-04-28
Publication date: 2015-12-11

Abstract

According to the automotive weather strip manufacturing method of the present invention, there is provided a weather strip manufacturing method for automotive vehicles, which comprises a seal portion having a U-shaped cross section and having a sealing function, a joining member integrally formed with the seal portion and engaged with a flange portion of the vehicle, 1. A method for manufacturing a weather strip for automobiles, comprising the steps of: (a) extruding the core and the thermoplastic elastomer to produce a weather strip; (b) a primer applying step of applying a primer to the surface of the prepared weather strip; (c) applying a slip agent to the surface of the primer applied in the primer application step, wherein the slip agent is mixed with silicon and polyurethane; And (d) a curing step of curing the coating layer composed of the primer and the slipping agent.
INDUSTRIAL APPLICABILITY As described above, the present invention can provide a method for manufacturing a weather strip for automobiles, which can improve emotional quality, reinforceability and abrasion resistance.

Description

Technical Field [0001] The present invention relates to a weather strip manufacturing method for automobiles,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing an automotive weather strip, and more particularly, to a method for manufacturing a weather strip for automobile, which is made of an olefin rubber or a thermoplastic elastomer and is manufactured such that a slip layer having low friction resistance is formed on the surface of the weather strip .

Generally, weather strips for automobiles are used to seal doors and bodies, door channels or trunk lids to prevent outside air, sound, dust, rain, The rubber packing on the edge absorbs the shock when the door is closed, and also suppresses the vibration of the door trunk lid during running.

These weather strips include body weather strips, door weather strips, glass run, trunk lid and back door weather strips. These are installed between the body side and the door frame to absorb the impact when the door is closed, Thereby preventing foreign matter from entering.

Conventional weather strips are manufactured by extrusion and simultaneous extrusion of Slip-TPO. However, the durability of the slip agent is excellent, but due to the hardness, the compressive load is increased, and accordingly, it is difficult to commercialize the slip agent due to various problems such as surface fracture.

On the other hand, in the case of Japanese Laid-Open Patent Publication No. 2004-149102, the surface layer is extremely hard to be subjected to permanent deformation, and it is difficult to control by the multiple extrusion. Further, there is a serious problem of contamination of dust and the like due to surface static electricity, and there are many problems due to handling problems, resulting in commercialization.

In addition, European Patent Publication No. 01197519 relates to a polyolefin resin composition which makes it possible to produce a product with improved strength, impact resistance and heat resistance, a process for the production of a polyolefin resin compound and a polyolefin product. However, the European patent also has the disadvantages of the above-mentioned prior art.

Japanese Laid-Open Patent Publication No. 2004-149102 European Patent Publication No. 01197519

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a weather strip for vehicles, which is capable of improving the sensibility, And to provide a manufacturing method thereof.

In order to accomplish the above object, according to the present invention, there is provided a method for manufacturing a weather strip for automotive vehicles, the method comprising the steps of: forming a U-shaped cross-section seal member having a seal function; (A) a weather strip manufacturing step of producing a weather strip by extrusion-molding the core and the thermoplastic elastomer; and (c) forming a weather strip on the weather strip. (b) a primer applying step of applying a primer to the surface of the prepared weather strip; (c) applying a slip agent to the surface of the primer applied in the primer application step, wherein the slip agent is mixed with silicon and polyurethane; And (d) a curing step of curing the coating layer composed of the primer and the slipping agent.

In the step of applying the primer, when the surface temperature of the prepared weather strip is 25 to 150 °, the primer is applied and cured within 1 minute.

The weather strip has a tensile strength of 2.0 to 3.0 MPa.

In the slip agent application step, a slip agent in which the silicone and polyurethane are mixed is sprayed with a spray at a surface temperature of 25 to 150 ° of the weather strip, and is applied to the surface of the weather strip.

The slip agent is 50% to 90% of silicon and 10% to 50% of polyurethane.

In the curing step, the weather strip is cured by any one or combination of infrared (IR), near infrared (NIR), and heat at a temperature of 50 to 160 and cured within 5 minutes.

(E) a first cooling step of cooling the weather strip after (a) or after (b); And (f) after the step (d), cooling the weather strip.

The elastic modulus of the weather strip on which the slip agent is applied is 2000 to 5000 MPa.

The core material of the weather strip is made of any one of polypropylene, polyamide or talc, glass fiber (gf) or steel (STEEL).

The thermoplastic elastomer is composed of one or more of styrene type, olefin type, urethane type, amide type, polyester type, vinyl chloride type and modified type thereof.

INDUSTRIAL APPLICABILITY The effects of the present invention as described above can provide a method for manufacturing a weather strip for automobiles that can improve emotional quality, permanent deformation performance, reinforcing property, and wear resistance.

1 is a cross-sectional view illustrating a weather strip for a vehicle according to a preferred embodiment of the present invention.
2 is a flowchart showing a method of manufacturing a weather strip for a vehicle according to a preferred embodiment of the present invention.
3 and 4 are tables and graphs showing LLS (Long Term Load Set GMW15564) test results of a weather strip manufactured by a method for manufacturing an automotive weather strip according to a preferred embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

Hereinafter, the present invention will be described with reference to the drawings for explaining a method for manufacturing an automotive weather strip in accordance with embodiments of the present invention.

FIG. 1 is a cross-sectional view showing a weather strip for a vehicle according to a preferred embodiment of the present invention, and FIG. 2 is a flowchart showing a method for manufacturing a weather strip for a vehicle according to a preferred embodiment of the present invention.

1 and 2, a method of manufacturing a weather strip according to an embodiment of the present invention includes a seal portion having a U-shaped cross section and having a sealing function, a coupling member integrally formed with the seal portion and coupled to a flange portion of the vehicle, And a core inserted into the interior of the coupling member.

The method for manufacturing a weather strip for an automobile according to the present invention includes a weather strip manufacturing step (S10), a primer application step (S20), a slip step (S30) and a curing step (S40).

In the weather strip manufacturing step S10, the core strip 12 and the thermoplastic elastomer are extrusion-molded to produce the weather strip 10.

At this time, it is preferable that the core material of the weather strip is made of any one of polypropylene, polyamide or talc, glass fiber (gf) or steel (STEEL).

The primer applying step S20 applies a primer to the surface of the engaging member 13 and the surface of the seal portion 11 of the manufactured weather strip 10.

It is preferable that the primer is applied and cured within 1 minute when the surface temperature of the produced weather strip 10 is 25 to 150 °.

At this time, the primer further includes at least one of fluorine, polypropylene, polyethylene, carbon, amide wax, adhesion promoter and oil.

The slip layer forming step S30 applies the mixed slip agent containing silicon and polyurethane to the surface of the primer applied in the primer applying step S20.

At this time, the slip layer forming step S30 is performed by applying a slip agent in which silicon and polyurethane are mixed with a spray at a surface temperature of 25 to 150 ° of the weather strip 10 to the surface of the weather strip 10 .

At this time, the slip agent is composed of at least one of fluorine, polypropylene, polyethylene, carbon, amide wax, adhesion promoter and oil.

More preferably, when the surface temperature of the weather strip 10 is 80 °, it is preferable to apply it to the surface of the weather strip 10 by spraying.

The slip agent is preferably 50% to 90% of silicon and 10% to 50% of polyurethane.

At this time, the applied elastic modulus of the weather strip 10 is preferably 2000 to 5000 MPa.

That is, spraying and spraying on the surface of the weather strip 10 can improve the emulsion quality and permanent deformation.

In addition, dust and the like are not contaminated by static electricity.

The curing step (S40) cures the coating layer composed of the primer and the slipping agent.

At this time, in the curing step S40, it is preferable that the weather strip 10 is cured by any one or combination of infrared (IR), near infrared (NIR) and warm heat at a temperature of 50 to 160 degrees and cured within 5 minutes Do.

In particular, thermal deformation of the weather strip 10 can be prevented by curing it with indirect heat such as infrared (IR), near infrared (NIR), and heat.

Further, the method for manufacturing a weather strip for a vehicle according to the present invention further includes a first cooling step and a second cooling step.

The first cooling step cools the weather strip 10 after the weather strip manufacturing step or after the adhesive application step.

The second cooling step cools the weather strip 10 after the curing step.

The weather strip 10 thus formed is made of a styrene-based or olefin-based rubber or elastomer.

The thermoplastic elastomer may be a thermoplastic styrenic block copolymer (SBC), a thermoplastic olefinic elastomer (TPO), a thermoplastic polyurethane (TPU), a thermoplastic polyamide (TPAE), a thermoplastic polyester elastomer TPEE, thermoplastic PVC (TPVC), and modified products thereof, or a combination of two or more thereof.

At this time, the weather strip preferably has a tensile strength of 2.0 to 3.0 MPa.

Hereinafter, a report on the LLS (Long Term Load Set GMW15564) test of the method for manufacturing an automotive weather strip according to the present invention will be described.

3 and 4 are tables and graphs showing LLS (Long Term Load Set GMW15564) test results of a weather strip manufactured by a method for manufacturing an automotive weather strip according to a preferred embodiment of the present invention.

Referring to the LLS (Long Term Load Set GMW15564) test report of the method for manufacturing weather strip for automobiles according to the present invention, as shown in Figs. 3 and 4, the specification of the weather strip 10 is as follows: The compressive load change rate should be 43% or less for 360 hours.

3 and 4, a method for manufacturing a weather strip for automobiles according to the present invention includes applying a slip agent in which silicon and polyurethane are mixed on a surface of a thermoplastic elastomer, It can be seen that the rate of change of compressive load at temperature is 38.2%. It can be seen that the rate of change of the compressive load exceeds 43% in the case of the web strip of the present invention.

Accordingly, the method for manufacturing a weather strip for automobile according to the present invention is characterized in that a slip agent composed of a thermoplastic elastomer and mixed with silicon and polyurethane is applied to the surface of the thermoplastic elastomer, thereby meeting the specification of the weather strip 10 Able to know.

It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the appended claims rather than the foregoing detailed description, and all changes or modifications derived from the meaning and scope of the claims and the equivalents thereof are included in the scope of the present invention Should be interpreted.

10: Weather Strip
11: Seal
12: Core
13:

Claims

A weather strip formed in a U-shape in cross section and having a sealing function, a joining member integrally formed with the seal portion and engaged with a flange portion of the vehicle, and a core inserted into the joining member, In the production method of the present invention,
(a) a weather strip manufacturing step of producing a weather strip by extrusion-molding the core and the thermoplastic elastomer;
(b) a primer applying step of applying a primer to the surface of the prepared weather strip;
(c) applying a slip agent to the surface of the primer applied in the primer application step, wherein the slip agent is mixed with silicon and polyurethane; And
(d) a curing step of curing the coating layer composed of the primer and the slipping agent,
A weather strip formed in a U-shape in cross section and having a sealing function, an integral member formed integrally with the seal portion, a coupling member coupled to a flange portion of the vehicle, and a core inserted into the coupling member, In the production method of the present invention,
(a) a weather strip manufacturing step of producing a weather strip by extrusion-molding the core and the thermoplastic elastomer;
(b) a primer applying step of applying a primer to the surface of the prepared weather strip;
(c) applying a slip agent to the surface of the primer applied in the primer application step, wherein the slip agent is mixed with silicon and polyurethane; And
(d) a curing step of curing the coating layer composed of the primer and the slipping agent,
The primer application step comprises:
When the surface temperature of the prepared weather strip is 25 to 150 °, the primer is applied, cured within 1 minute,
Wherein the slip agent applying step comprises:
A slip agent in which silicon and polyurethane are mixed is sprayed with a spray at a surface temperature of 25 to 150 ° of the weather strip to be applied to the surface of the weather strip,
Wherein the slip agent is 50% to 90% of silicon and 10% to 50% of polyurethane.

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The method according to claim 1,
And a tensile strength of 2.0 to 3.0 MPa.

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The method according to claim 1,
Wherein the weather strip is cured by any one or combination of infrared (IR), near infrared (NIR), and heat at a temperature of 50 to 160, and cured within 5 minutes.

The method according to claim 1,
(e) a first cooling step of cooling the weather strip after (a) or after (b); And
(f) a second cooling step of cooling the weather strip after the step (d).

The method according to claim 1,
Wherein the elastic modulus of the weather strip coated with the slip agent is 2000 to 5000 MPa.

2. The weather strip according to claim 1,
A method for manufacturing a weather strip for an automobile, the method comprising the steps of: preparing a weather strip according to any one of Claims 1 to 3, wherein the strip is made of polypropylene or polyamide or talc or glass fiber (gf) or steel (STEEL).

The thermoplastic elastomer composition according to claim 1,
The method for manufacturing a weather strip for automobile according to claim 1, wherein the weather strip is made of one or more of styrene type, olefin type, urethane type, amide type, polyester type, vinyl chloride type and modified type thereof.