JP2007296669A - Manufacturing method of sealing member for car - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of a sealing member for a car capable of achieving the shortening of a manufacturing line and a manufacturing time or the enhancement of productivity. <P>SOLUTION: A glass run is mounted on the door of the car as the sealing member for the car. When an extrusion molded body 40 becoming the extrusion molding part of the glass run is manufactured, an EPDM rubber material at a TPO material are subjected to co-extrusion to mold the extrusion molded body 40 wherein a sealing lip or the like comprising an EPDM solid rubber and a main body part comprising TPO are integrated. An SiH group-containing compound is added to the EPDM rubber material as a crosslinking agent and hydrosilicone crosslinking is applied to the extrusion molded body 40 in a crosslinking process. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a method of manufacturing a sealing member for an automobile such as a glass run or a weather strip attached to an automobile or the like.

  A glass run or a weather strip is attached as a seal member to an automobile or the like. These are formed by, for example, ethylene / propylene / diene copolymer (EPDM) rubber, olefin-based thermoplastic elastomer (TPO), or the like. For example, an opening trim weather strip (simply referred to as a weather strip), which is one of automotive seal members, includes a trim portion that is attached to a peripheral edge of a door opening of a vehicle body, and a seal that is formed integrally with the trim portion. Part. The trim portion is formed of EPDM solid rubber in which an insert member is embedded from the viewpoint of ensuring a predetermined strength. On the other hand, the seal portion is formed of EPDM sponge rubber to ensure flexibility. Furthermore, a decorative layer made of TPO is formed on the outer surface of the trim portion to ensure design properties.

  When manufacturing such a weather strip or the like, after forming an extrusion molding part by a known extrusion molding method, the end of the extrusion molding part is set in a mold apparatus, and a mold is formed against the end surface of the extrusion molding part. The forming part is continuously connected and formed.

  Further, when manufacturing the extrusion molding part, the unvulcanized rubber material respectively supplied from the extruder for solid rubber and the extruder for sponge rubber is extruded into a predetermined shape from one die. Then, an intermediate molded body of an extrusion molded part in which a trim part made of solid rubber and a seal part made of sponge rubber are integrated is molded.

  The intermediate molded body extruded from the die is first guided to a high-frequency vulcanization tank (UHF) using internal heat generation of the rubber portion, and subjected to primary vulcanization. At this time, foaming of the sponge rubber material acts to start foaming. Then, it guides to a hot air vulcanization tank (HAV) using external heating, secondary vulcanization is performed, and vulcanization is completed.

  On the other hand, in another extruder, the TPO for forming the decorative layer is melted, the TPO is extruded from a die into a sheet, and the TPO extruded into the sheet is vulcanized. Supply on the body. And a decoration layer is formed in the outer surface of a trim part by pressing this with a roller etc. After the intermediate molded body on which the decorative layer of TPO is laminated is cooled, it is sent to the mold forming process as a completed extruded body through a trim part bending process, a cutting process, and the like.

In manufacturing a weather strip, further reduction in manufacturing time is desired. For this reason, in recent years, some EPDM rubber materials and TPO materials are co-extruded from a single die to reduce the manufacturing time (see, for example, Patent Document 1).
JP 2000-344025 A

  However, since the vulcanization temperature of EPDM rubber is 180 to 220 ° C. and the melting point of TPO is 150 to 160 ° C., when co-extrusion of EPDM rubber material and TPO material, TPO is not contained in the vulcanization tank. Remelting may cause problems such as poor appearance. For this reason, in order to avoid the said trouble, in the said prior art, very severe temperature management of maintaining the temperature environment which can vulcanize EPDM rubber and TPO does not melt | dissolve is required. For example, measures such as shortening the vulcanization time in the hot air vulcanization tank to prevent the temperature rise of TPO are taken.

  In the prior art, vulcanization must be performed for a relatively long time, such as vulcanization in a high-frequency vulcanization tank and further vulcanization in a hot-air vulcanization tank. In addition to this, the intermediate formed body (TPO portion) once heated to a high temperature must be cooled, and a relatively long cooling time is also required. Therefore, it took a relatively long time to manufacture the extrusion-molded part.

  Such a problem is not limited to the weather strip but is also present in other automotive seal members such as a glass run made of an EPDM rubber material and a TPO material.

  The present invention has been made to solve the above-described problems, and its object is to provide a manufacturing method of a sealing member for an automobile capable of shortening a manufacturing line and a manufacturing time and improving productivity. There is to do.

  In the following, each means suitable for solving the above-described problems will be described in terms of items. In addition, the effect etc. peculiar to the means to respond | correspond as needed are added.

Means 1. An uncrosslinked ethylene / propylene / diene copolymer (EPDM) rubber contains a SiH group-containing compound having two or more SiH groups in one molecule, a reaction catalyst comprising a platinum group element, and a reaction inhibitor. A hydrosilicone crosslinked material;
It has a coextrusion molding process in which an extruded part is formed by coextruding an olefinic thermoplastic elastomer (TPO) material containing an ethylene / propylene / diene copolymer rubber obtained by peroxide crosslinking. The manufacturing method of the sealing member for motor vehicles characterized by the above-mentioned.

  According to the above means 1, the extruded part is formed by simultaneously extruding the EPDM rubber material and the TPO material. Further, since the hydrosilicone cross-linking method is adopted as the cross-linking method in manufacturing the extruded part, the cross-linking time can be shortened as compared with the vulcanization method using sulfur. As a result, the crosslinking of the EPDM rubber can be completed before the TPO reaches the melting point, and the possibility that the TPO is remelted when the EPDM rubber is crosslinked can be reduced. In addition, it is possible to omit the secondary cross-linking tank such as hot air cross-linking tank, or to lower the set temperature in the high-frequency cross-linking tank and shorten the subsequent cooling time. The production line and production time can be shortened and productivity can be improved. In addition, when the particles of EPDM rubber contained in the TPO material are obtained by vulcanization, there is a possibility that TPO and EPDM rubber may not be joined due to crosslinking inhibition. Both of them can be more reliably joined without causing such a problem.

Mean 2. The automobile sealing member is
A body portion attached to a vehicle door having a door glass and having a substantially U-shaped cross section including a base portion, a vehicle inner side wall portion and a vehicle outer side wall portion extending from the base portion, and the vehicle inner side wall portion and the vehicle outer side wall. Each glass run with a pair of seal lips extending from the part to the inside of the main body part and sealing with the door glass,
The main body is molded from the olefin-based thermoplastic elastomer material,
The manufacturing method of a sealing member for an automobile according to means 1, characterized in that the sealing lip is molded from the ethylene / propylene / diene copolymer rubber material.

  According to the above means 2, the main body is molded from TPO, and the seal lip is molded from EPDM rubber. Thereby, while ensuring the rigidity of a main-body part, the favorable elasticity of a seal lip can be ensured. Note that a glass run in which the main body portion is formed of TPO and the seal lip is formed of EPDM rubber is difficult to manufacture unless it is co-extrusion molding. However, in the case of coextrusion molding, there is a concern that TPO melts at the time of crosslinking of EPDM rubber, which has not been carried out conventionally.

Means 3. The automobile sealing member is
A trim part having a substantially U-shaped cross section that is attached to the peripheral part of the door of the vehicle or the peripheral part of the door opening;
A hollow seal portion that protrudes from the trim portion and is pressed against the door opening periphery or the door periphery when the door is closed,
A weather strip provided with a decorative layer formed on the outer surface of the trim part,
The trim part and the seal part are molded from the ethylene / propylene / diene copolymer rubber material,
The manufacturing method of the sealing member for motor vehicles of the means 1 characterized by shape | molding the said decoration layer with the said olefin type thermoplastic elastomer material.

  According to the above means 3, since there is no need to perform a step of laminating a TPO decorative layer on an extruded molded body that has been vulcanized as in the prior art, further shortening of the production line, production time, and productivity Improvements can be made. In addition, when the design lip is extended and formed in the outer surface of a trim part, a decoration layer will be formed in the outer surface of the said design lip.

Means 4. The trim part is molded from the ethylene / propylene / diene copolymer rubber material in a non-foamed form (solid form),
4. The manufacturing method of a sealing member for an automobile according to means 3, wherein the sealing portion is formed of the ethylene / propylene / diene copolymer rubber material in a foamed form (sponge).

Means 5. The automobile sealing member is
A weather strip having a base fixed to a vehicle body or a door, and a seal portion provided to protrude from the base and sealing between the vehicle body and the door,
The seal portion is molded from the ethylene / propylene / diene copolymer rubber material,
The manufacturing method of the sealing member for motor vehicles of the means 1 characterized by shape | molding the said base part with the said olefin type thermoplastic elastomer material.

  According to the means 5, the base portion is molded from TPO, and the seal portion is molded from EPDM rubber. Thereby, while ensuring the rigidity of a base part, the favorable elasticity of a seal | sticker part can be ensured. A weather strip in which the base portion is formed of TPO and the seal portion is formed of EPDM rubber is difficult to manufacture unless it is co-extrusion molding. However, in the case of coextrusion molding, there is a concern that TPO melts at the time of crosslinking of EPDM rubber, which has not been carried out conventionally.

Means 6. In addition to the coextrusion molding process,
A cooling step of cooling the extruded extruded body;
A method for producing an automobile seal member according to any one of means 1 to 5, further comprising a crosslinking step of crosslinking the rubber material of the extruded product that has undergone the cooling step.

  According to the above means 6, after the co-extrusion molding process, a cooling process for cooling the extruded extruded body is performed, so that the temperature increase of TPO in the next crosslinking process is suppressed, and the melting of TPO is more reliably suppressed. be able to. Here, if the silicone crosslinking is performed by high-frequency heating, the crosslinking time can be shortened compared to hot air heating, and the above-described effects can be further improved.

[First Embodiment]
The first embodiment will be described below with reference to the drawings. As shown in FIG. 1, a front door 3 (hereinafter simply referred to as a door) as a vehicle door is provided in a door opening 2 of an automobile 1 as a vehicle so as to be openable and closable. The door 3 includes a door glass G that can be moved up and down, and a glass run 4 as an automobile seal member corresponding to the outer peripheral shape of the door glass G.

  As shown in FIG. 2, the glass run 4 includes an upper extrusion molding portion 6 corresponding to the upper side portion in the longitudinal direction, vertical extrusion molding portions 7 and 8 corresponding to the front and rear vertical side portions, and each extrusion molding portion 6. , 7 and 8 are distinguished from mold forming portions 9 and 10 (parts with a dotted pattern in FIG. 2) for connecting the end portions.

  As shown in FIG. 3, which is a cross-sectional view taken along the line JJ of FIG. 2, the glass run 4 includes a base portion 14 attached to a door sash (not shown), a vehicle inner side wall portion 15 extending from both ends of the base portion 14, and a vehicle outer side. A pair of body parts 11 each having a substantially U-shaped cross-section composed of the side wall parts 16, and extending from the front ends of the vehicle inner side wall part 15 and the vehicle outer side wall part 16 to the inside of the main body part 11 and sealing with the door glass G. The seal lips 12 and 13, and holding lips 17 and 18 that extend from the tips of the vehicle inner side wall portion 15 and the vehicle outer side wall portion 16 to the outside of the main body portion 11, respectively.

  In this embodiment, the main body 11 is formed of an olefin-based thermoplastic elastomer (TPO) material, and the seal lips 12 and 13 and the holding lips 17 and 18 are made of an ethylene / propylene / diene copolymer (EPDM) solid rubber material. It is formed by. Note that the EPDM solid rubber in this embodiment has a hardness of 70 to 90 IRHD and a compression set (CS) of 70% or less.

  Next, the manufacturing method of the glass run 4 is demonstrated. First, the manufacturing process of the extrusion molded body which becomes each extrusion molding part 6-8 is demonstrated. FIG. 4 is a schematic view showing a part of the production line of the extruded product 40, and the workpiece to be the extruded product 40 is produced while proceeding from the left side to the right side in this figure.

  First, in the extrusion process, the intermediate molded body of the extruded molded body 40 is extruded. In the production line used in the extrusion process, two extruders 30 and 31 are connected to one co-extrusion die 32. One of the two extruders 30 and 31 is an EPDM rubber extruder 30 for extruding EPDM solid rubber for forming the seal lips 12 and 13 and the holding lips 17 and 18, and the other is a main body. This is a TPO extruder 31 for extruding TPO for forming the portion 11. The EPDM solid rubber and TPO supplied from the extruders 30 and 31 are simultaneously extruded from the die 32, and the seal lips 12 and 13 made of EPDM solid rubber and the main body 11 made of TPO are integrated. The intermediate molded body 33 is molded. Therefore, this extrusion process corresponds to the coextrusion molding process in the present embodiment. The EPDM rubber particles contained in the TPO material used in this embodiment are obtained by peroxide crosslinking.

  The intermediate molded body 33 extruded in the extrusion process is cooled in the next first cooling process. More specifically, a water cooling tank 34 in which water is stored is provided, and cooling is performed by passing the intermediate molded body 33 (at least the TPO portion) through the water cooling tank 34. The first cooling process corresponds to the cooling process in the present embodiment.

  In the subsequent cross-linking step, the intermediate molded body 33 is guided to the high-frequency cross-linking tank (UHF) 35 and subjected to cross-linking. The EPDM solid rubber material contains a SiH group-containing compound having two or more SiH groups in one molecule as a crosslinking agent, and a reaction catalyst and a reaction inhibitor made of a platinum group element. That is, in the present embodiment, as a crosslinking method, a silicone crosslinking method in which a SiH group-containing compound reacts with EPDM and acts as a crosslinking agent is employed.

  The intermediate molded body 33 that has undergone the crosslinking step is sent to the second cooling step and cooled in the water cooling bath 36. Thereafter, in the coating step, a sliding layer as a coating portion is formed on a portion that becomes the glass sliding surface of the seal lips 12 and 13. In this embodiment, the PE sheet 36 is pasted. Of course, not limited to this, the sliding layer may be formed of a urethane coating layer or the like, or the sliding layer may be omitted.

  The intermediate molded body 33 that has undergone the coating process is cut into a predetermined size by a cutter 38 to become an extruded molded body 40.

  Then, in the mold forming step, the extrusion molded bodies 40 corresponding to the respective extrusion molded sections 6 to 8 are set in a mold apparatus (not shown), and the mold molded sections 9 and 10 are connected and molded to obtain the glass run 4.

  Here, the temperature change of the EPDM part (seal lips 12, 13 and the like) and the TPO part (main body part 11) of the extrusion molded body 40 (intermediate molded body 33) will be described with reference to FIG.

When the temperatures of the EPDM part and the TPO part of the intermediate molded body 33 at the time T ₀ coextruded from the die 32 are 70 ° C. and 200 ° C., respectively, at the end time T ₁ of the cooling step, both parts are 40 ° C., Cool to 100 ° C.

Next, by passing through the high-frequency crosslinking tank 35, the temperature of the EPDM portion increases due to internal heat generation, and the crosslinking proceeds. Then, the temperature is 130 ° C. at the end T ₂ of the cross-linking step. On the other hand, since no internal heat generation occurs in the TPO portion, the temperature rises up to 130 ° C. only by heat transfer from the EPDM portion.

Thereafter, both the EPDM and TPO portions are cooled to about 40 ° C. at the end point T ₃ of the second cooling step. Thus, the temperature of the TPO portion changes at a temperature lower than its own melting temperature (melting point) 150 to 160 ° C. after passing through the first cooling step.

  As described above in detail, in the present embodiment, the main body portion 11 is formed of TPO, and the seal lips 12, 13 and the like are formed of EPDM rubber that is crosslinked with silicone. Thereby, while ensuring the rigidity of the main-body part 11, favorable elasticity, such as the seal lips 12 and 13, can be ensured.

  Further, in the present embodiment, the EPDM rubber material and the TPO material are simultaneously extruded to form the extrusion molded body 40 corresponding to each of the extrusion molded portions 6 to 8. The glass run 4 in which the main body 11 is molded from TPO and the seal lips 12, 13 and the like are molded from EPDM rubber is difficult to manufacture unless simultaneous extrusion molding is performed. However, in the case of coextrusion molding, there is a concern that TPO melts at the time of crosslinking of EPDM rubber, which has not been carried out conventionally. On the other hand, in the present embodiment, when the extrusion molded body 40 is manufactured, the crosslinking time can be shortened as compared with the vulcanization method using sulfur because the silicone crosslinking method is adopted as the crosslinking method. . As a result, the crosslinking of the EPDM rubber can be completed before the TPO reaches the melting point, and the possibility that the TPO is remelted when the EPDM rubber is crosslinked can be reduced. In addition, it is possible to omit a secondary crosslinking tank such as a hot-air crosslinking tank or to lower the set temperature in the high-frequency crosslinking tank 35 and to shorten the subsequent cooling time. Therefore, the production line and the production time can be shortened and the productivity can be improved.

  Moreover, since it passes through the 1st cooling process which cools the extruded intermediate molded body 33 after an extrusion process, the temperature rise of TPO in the following bridge | crosslinking process can be suppressed, and melting of TPO can be suppressed more reliably.

  Further, the EPDM rubber particles contained in the TPO material used in the present embodiment are obtained by peroxide crosslinking. When the particles of EPDM rubber contained in the TPO material are obtained by vulcanization, there is a possibility that TPO and EPDM rubber may not be joined due to crosslinking inhibition. Both can be more reliably joined without causing such a problem.

[Second Embodiment]
Below, 2nd Embodiment is described with reference to drawings. As shown in FIG. 1, a weather strip 5 is mounted on the periphery of the door opening 2 of the automobile 1 as a sealing member for the automobile. As shown in FIG. 5, the weather strip 5 of the present embodiment is formed in an annular shape along the periphery of the door opening 2.

  The weather strip 5 includes extrusion-molded portions 51 and 52 and mold-molded portions (portions with the dotted pattern) 53 and 54. The extrusion molding parts 51 and 52 are formed substantially linearly (in a long shape) by an extrusion molding machine (not shown). Further, the mold forming parts 53 and 54 are formed by a predetermined mold apparatus so as to connect the edges of the adjacent extrusion forming parts 51 and 52.

  As shown in FIG. 6, which is a sectional view taken along the line KK in FIG. 5, the weather strip 5 includes a trim portion 55 and a seal portion 56. The trim portion 55 includes a connection portion 59 that connects the vehicle inner side wall portion 57, the vehicle outer side wall portion 58, and both side walls 57, 58, and has a substantially U-shaped cross section as a whole. The trim portion 55 is made of a non-foamed EPDM solid rubber, and a metal insert 60 is embedded in the trim portion 55.

  A plurality of holding lip portions 62 extending toward the inner side (vehicle inner side) of the trim portion 55 are integrally formed on the inner surface (vehicle inner side surface) of the vehicle outer side wall portion 56, and the inner surface (vehicle outer surface) of the vehicle inner side wall portion 11 is integrally formed. A holding lip portion 63 that extends toward the inside (the vehicle outer side) of the trim portion 5 is integrally formed. A design lip 65 is formed on the connecting portion 59 so as to cover an end of an interior product such as garnish (not shown).

  Further, a flange 73 is formed on the periphery of the door opening 2 by joining the inner panel 71 and the outer panel 72 of the body, and the trim strip 55 is fitted into the flange 73, whereby the weather strip 5 Is held at the periphery of the door opening 2.

  On the other hand, the seal portion 56 protrudes and is integrally provided on the vehicle outer side wall portion 58, and is formed in a hollow shape by EPDM sponge rubber having a foamed form. When the door 3 is closed, the seal portion 56 is pressed against the periphery of the door 3 to seal between the door 3 and the body of the automobile 1.

  Further, the outer surface of the design lip 65 ranging from the substantially distal end portion to the base end portion, the connecting portion 59 of the trim portion 55, and the connecting portion with the seal portion 56 in the vehicle outer side wall portion 58 is added with TPO. A decorative layer 75 is formed.

  Since the method for manufacturing the weather strip 5 is substantially the same as the method for manufacturing the glass run 4 in the first embodiment, a detailed description thereof will be omitted. However, in the present embodiment, three extruders are used in the extrusion process of extruding the intermediate molded body of the extruded molded body. That is, an EPDM rubber extruder for extruding the EPDM solid rubber for forming the trim portion 55 and the insert 60 covered by the EPDM rubber extruder, and an EPDM rubber extrusion for extruding the EPDM sponge rubber for forming the seal portion 56. And a TPO extruder for extruding TPO for forming the decorative layer 75 are used.

  Therefore, according to the present embodiment, the same operational effects as those of the first embodiment are exhibited. Furthermore, in this embodiment, since there is no need to perform a process of laminating a TPO decorative layer on an extruded molded body that has been vulcanized as in the prior art, the production line and production time can be further reduced and productivity can be improved. Etc.

  In addition, it is not limited to the description content of the said embodiment, For example, you may implement as follows. Of course, other application examples and modification examples not illustrated below are also possible.

  (A) In the first embodiment, the glass run 4 attached to the front door 3 is embodied. However, the glass run attached to another door such as a glass run attached to the rear door may be embodied. .

  (B) In the second embodiment, the weather strip 5 attached to the door opening 2 is embodied. However, the weather strip 5 may be embodied in another weather strip such as a weather strip attached to the door periphery. it can. For example, a weather strip 80 as shown in FIG. 8 may be used. The weather strip 80 includes a base portion 81 as a base portion attached to a retainer (not shown) on the peripheral edge of the door, a seal portion 83 extending from the base portion 81 and having a hollow portion 82 therein, and a base end portion of the seal portion 83 A lip portion 84 extending from the lip portion. The base part 81 is made of TPO, and the seal part 83 and the like are made of EPDM sponge rubber. Thereby, while ensuring the rigidity of the base part 81, the favorable elasticity of the seal part 83 is securable.

  (C) The EPDM rubber used in each of the above embodiments is not limited to the physical properties of each of the above embodiments such as hardness after crosslinking.

  For example, the EPDM rubber constituting the seal lips 12, 13 and the like in the first embodiment has a solid form and has a hardness of 70 to 90 IRHD. However, the seal lips 12, 13 and the like may be configured with fine foam rubber having a specific gravity of 0.97 to 1.1.

  (D) Further, the manufacturing method is not limited to the above-described embodiments. For example, the cooling time in the cooling process, the set temperature in the high-frequency crosslinking tank 35 in the crosslinking process, and the like are changed to other forms. Is also possible. It is sufficient that the temperature of at least the TPO portion changes at a temperature lower than the melting temperature (melting point) 150 to 160 ° C.

It is a perspective view which shows a motor vehicle. It is a front view which shows the glass run in 1st Embodiment. It is the JJ sectional view taken on the line of FIG. 2 which shows a glass run. It is a schematic diagram which shows a part of manufacturing line of an extrusion molded object. It is a figure which shows the temperature change of EPDM and a TPO part. It is a front view which shows the weather strip in 2nd Embodiment. It is the KK sectional view taken on the line of FIG. 6 which shows a weather strip. It is sectional drawing which shows the weather strip in another embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Automobile, 3 ... Door, 4 ... Glass run, 6, 7, 8 ... Extrusion part, 9, 10 ... Molding part, 30, 31 ... Extruder, 32 ... Dies, 40 ... Extrusion body.

Claims (6)

An uncrosslinked ethylene / propylene / diene copolymer rubber contains a SiH group-containing compound having two or more SiH groups in one molecule, a reaction catalyst comprising a platinum group element and a reaction inhibitor, and is crosslinked with silicone. Material to be used,
It has a coextrusion molding process in which an extruded part is formed by coextrusion with an olefinic thermoplastic elastomer material containing an ethylene / propylene / diene copolymer rubber obtained by peroxide crosslinking. The manufacturing method of the sealing member for motor vehicles. The automobile sealing member is
A body portion attached to a vehicle door having a door glass and having a substantially U-shaped cross section including a base portion, a vehicle inner side wall portion and a vehicle outer side wall portion extending from the base portion, and the vehicle inner side wall portion and the vehicle outer side wall. Each glass run with a pair of seal lips extending from the part to the inside of the main body part and sealing with the door glass,
The main body is molded from the olefin-based thermoplastic elastomer material,
2. The method for producing a sealing member for an automobile according to claim 1, wherein the sealing lip is formed from the ethylene / propylene / diene copolymer rubber material. The automobile sealing member is
A trim part having a substantially U-shaped cross section that is attached to the peripheral part of the door of the vehicle or the peripheral part of the door opening;
A hollow seal portion that protrudes from the trim portion and is pressed against the door opening periphery or the door periphery when the door is closed,
A weather strip provided with a decorative layer formed on the outer surface of the trim part,
The trim part and the seal part are molded from the ethylene / propylene / diene copolymer rubber material,
The method for producing a sealing member for an automobile according to claim 1, wherein the decorative layer is formed from the olefinic thermoplastic elastomer material. The trim part is molded from the ethylene / propylene / diene copolymer rubber material in a non-foamed form,
The said sealing part is shape | molded by the said ethylene-propylene-diene copolymer rubber material used as a foaming form, The manufacturing method of the sealing member for motor vehicles of Claim 3 characterized by the above-mentioned. The automobile sealing member is
A weather strip having a base fixed to a vehicle body or a door, and a seal portion provided to protrude from the base and sealing between the vehicle body and the door,
The seal portion is molded from the ethylene / propylene / diene copolymer rubber material,
The method for manufacturing a sealing member for an automobile according to claim 1, wherein the base portion is formed from the olefinic thermoplastic elastomer material. In addition to the coextrusion molding process,
A cooling step of cooling the extruded extruded body;
A method for producing a sealing member for an automobile according to any one of claims 1 to 5, further comprising a crosslinking step of crosslinking a rubber material of the extruded product that has undergone the cooling step.

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