JP2008006700A - Molding method of weather strip and mold therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a molding method of a weather strip for molding the edge part of an extrusion molded part with good appearance when a molding part is formed to the edge part of the extrusion molded part molded by extrusion molding, and a mold used therein. <P>SOLUTION: A grasping part 20b for grasping the edge part of the extrusion molded part and a cavity 20c for forming the molding part are provided to the mold 20. The grasping part 20b has the grasping cores 23, 24 and 25 brought into contact with the edge part of the extrusion molded part and at least a part of them is formed of a material low in heat conductivity and, after the edge part of the extrusion molded part is grasped by the grasping part, a rubber material which constitutes the molding part, is injected in the cavity and subsequently crosslinked to mold the weather strip. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a weather strip molding method in which a molded part is molded by molding at an end of an extruded part of a weather strip molded by extrusion molding, and a molding die used for the molding method. is there.

  The seal between the door of the automobile and the periphery of the vehicle body opening is a door weather strip attached to the outer periphery of the door frame provided on the outer periphery of the door and / or the opening weather attached to the flange of the periphery of the vehicle body opening. Made by strips. The seal between the door glass and the door is made by a glass run attached to a channel on the inner periphery of the door frame.

As shown in FIG. 9, the door weather strip 110 is formed along the shape of the door frame, and is formed by extrusion that is a part that is attached to the upper side and the vertical side of the door frame. It consists of parts 117 and 117 and a molding part 116 formed by molding which is a part attached along the corner part of the door frame.
The extrusion molding portions 117 and 117 are formed of hollow seal portions 112 and 112 which are integrally formed from the mounting base portions 111 and 111 attached to the door frame and the mounting base portions 111 and 111 and seal against the periphery of the vehicle body opening. .
The cross-sectional shape of the end portion of the mold forming portion 116 is formed in the same manner as the cross-sectional shapes of the extrusion forming portions 117 and 117 to be connected.

  10 to 12, the mold forming part 116 is formed by injecting a molding material into a cavity 120c formed between the upper mold 121 and the lower mold 122 of the molding die 120. When molding the molded part 116, the ends of the extruded parts 117, 117 are used for molding in order to integrally vulcanize or weld the extruded parts 117, 117 and the molded part 116 simultaneously with molding. It clamps with the clamping part 120b of a metal mold | die (for example, refer patent document 1 and patent document 2). At this time, it is necessary to strongly hold the extrusion molding portions 117 and 117 so as not to come out of the molding die 120 due to the pressure of the molding material injected into the cavity 120c.

  As shown in FIGS. 10 to 14, the end portions of the extrusion molding portions 117 and 117 are sandwiched by the core 129 and the first sandwiching core 123, in which the insertion core portion 127 of the molding die 120 is integrally formed. The outer surface of the end portion of the extruded portion 117 is pressed from four directions by the two sandwich cores 124, the third sandwich core 125, and the fourth sandwich core 126. FIG. 11 shows a cross section of the molding die 120 in a direction perpendicular to the longitudinal direction of the extruded portion 117 at the longitudinal side portion.

  FIG. 12 shows a cross section in the direction along the longitudinal direction of the extrusion molding portion 117 in the sandwiching portion 120 b of the molding die 120. The extrusion molding part 117 is clamped by the clamping part 120b of the molding die 120, and the molding material of the mold molding part 116 is injected or injected into the cavity 120c. An insertion core portion 127 is inserted into the hollow seal portion 112 of the extrusion molding portion 117 and is supported from the inner surface when the end portion of the extrusion molding portion 117 is pressed.

  An enlarged cross section of the pressing portion is shown in FIG. An unvulcanized rubber material, which is a molding material, is injected or injected into the cavity 120c. At this time, a convex portion 127b is formed on the outer periphery of the insertion core portion 127 so that the end portion of the extruded portion 117 made of sponge rubber does not come off from the sandwiching portion 120b. For this reason, the edge part of the extrusion molding part 117 will be compressed.

  Since the molding material is rubber when forming the molding part 116, the molding die 120 is heated for vulcanization. Since the extrusion molding part 117 has already been vulcanized, it will not be melted by the heat of the molding die 120, but the end of the sandwiched extrusion molding part 117 remains compressed as shown in FIG. The shape is fixed by heat, and the recess 117b is generated. In this case, not only the inner surface of the extrusion-molded portion 117 but also the outer surface is drawn to the inner surface to form a recess 117c. For this reason, the malfunction that the appearance of the edge part of the extrusion molding part 117 of the door weather strip 110 falls arises.

If the amount of compression at the end of the extrusion part 117 is reduced, the depth of the recesses 117b and 117c due to heat decreases, but the clamping force at the end part decreases, and the pressure of the molding material of the mold part 116 decreases the molding force. It becomes easy to remove from the mold 120.
Japanese Examined Patent Publication No. 4-9645 Japanese Examined Patent Publication No. 7-49203

  For this reason, the present invention provides a weather strip that can be formed with a good appearance at the end of the extrusion molding portion when the molding portion is molded at the end of the extrusion molding portion of the weather strip formed by extrusion molding. An object of the present invention is to provide a molding method and a molding die used for the molding method.

In order to solve the above problems, the present invention of claim 1 is a weather strip molding method in which a molded part is integrally formed by molding at an end of an extruded part molded by extrusion molding.
A mold part for mold molding is provided with a sandwiching part for sandwiching the end part of the extrusion molding part, and a cavity for forming the mold molding part, the sandwiching part has a sandwiching core that comes into contact with the end part of the extrusion molding part, At least a part of the sandwich core is formed of a material having low thermal conductivity,
This is a weather strip molding method in which after the end of an extrusion molding part is clamped by a clamping part, a rubber material constituting the mold molding part is injected or injected into a cavity and then the rubber is crosslinked to form.

According to the first aspect of the present invention, the molding die is provided with a clamping part for clamping the end of the extrusion molding part and a cavity for forming the molding part, and the clamping part is in contact with the end of the extrusion molding part. It has a core, and at least a part of the sandwiching core is made of a material having low thermal conductivity. For this reason, the heat of the molding die is hardly transmitted to the end portion of the extrusion molding portion, and the amount of the dent remaining on the surface due to the heat-curing of the end portion can be reduced. Therefore, it is possible to improve the appearance of the end portion of the extruded portion.
After the end of the extrusion molding part is clamped by the clamping part, the molding material is injected or injected into the cavity and molded, so that the extrusion molding part may be displaced or removed from the molding die. And the extrusion molding part and the mold molding part can be reliably connected.

  According to the second aspect of the present invention, the extrusion molding portion has a hollow seal portion, and the sandwiching portion of the molding die is an insertion core formed of a material having low thermal conductivity inserted into the hollow seal portion, and the hollow seal portion. When forming the hollow seal part of the mold part that is continuous with the hollow seal part of the extrusion part, the outer surface of the hollow seal part of the extrusion part is pressed by the insertion core and the sandwich core. After being held, the rubber material constituting the mold part is injected or injected into the cavity of the mold where the core formed integrally with the insertion core is disposed, and then the rubber is cross-linked and molded. The strip forming method.

In the present invention of claim 2, the extrusion molding part has a hollow seal part, and the clamping part of the mold is an insertion core formed of a material having low thermal conductivity inserted into the hollow seal part, and the hollow seal part It is formed from the clamping core which clamps the outer surface of the.
For this reason, the end of the hollow seal portion of the extrusion molding portion can be continuously positioned at the end of the cavity forming the hollow seal portion of the mold forming portion, and the hollow seal portion of the extrusion molding portion is securely held. can do.
The hollow seal portion of the extrusion molded portion injects or injects a rubber material constituting the mold forming portion into the cavity after pressing and sandwiching the outer surface of the hollow seal portion with the insertion core and the sandwich core. For this reason, the extrusion molding part is not displaced or removed from the molding die, and the extrusion molding part and the molding part are securely connected by matching the extrusion molding part and the hollow sealing part of the molding part. Can do. Moreover, the amount of dents remaining on the surface of the hollow seal portion of the extrusion molding portion can be reduced.

  According to a third aspect of the present invention, the extrusion molding portion has a seal lip portion, and the molding die has a sandwich core that abuts on and sandwiches both surfaces of the seal lip portion, and the sandwich core is formed of a material having low thermal conductivity. This is a method for forming a weather strip.

  According to a third aspect of the present invention, the extruded portion of the weather strip has a seal lip portion, and the molding die has a sandwich core that abuts and sandwiches both surfaces of the seal lip portion, and the sandwich core is thermally conductive. Because it is made of a low-performance material, the amount of heat conducted from the molding die to the surface of the seal lip at the end of the extruded part can be reduced, and the amount of dent on the surface of the seal lip can be reduced. It is possible to improve the appearance of the seal lip portion of the extruded portion.

  According to a fourth aspect of the present invention, there is provided the weather strip molding method according to any one of the first to third aspects, wherein the end portion of the extrusion molding portion is compressed to 0.1 mm to 1/2 the thickness thereof. .

  In the fourth aspect of the present invention, since the end portion of the extrusion molding portion is compressed and clamped to a thickness of 0.1 mm to ½ of the thickness, the end portion can be securely clamped, and the mold is formed in the cavity. Even if the rubber material constituting the part is injected or injected, the extrusion-molded part does not slip or come off from the molding die. In addition, since a part of the sandwich core made of a material having low heat conductivity is arranged in the compression part at the end of the extrusion molding part, heat is not transmitted even if it is greatly compressed, so that the compression part remains as a dent. There is nothing.

According to a fifth aspect of the present invention, there is provided a weatherstrip molding die for integrally molding a molded part by mold molding at an end of an extruded part of a weatherstrip molded by extrusion molding.
The molding die has a sandwiching portion that sandwiches the end portion of the extrusion molding portion and a cavity for forming the mold forming portion, and the sandwiching portion has a sandwiching core that contacts the end portion of the extrusion molding portion, A weatherstrip mold is characterized in that at least a part of the sandwiching core is made of a material having low thermal conductivity.

In the present invention of claim 5, since the molding die has a sandwiching part that sandwiches the end of the extrusion molding part and a cavity that forms the molding part, a rubber material constituting the molding part is formed in the cavity. Even if injection or injection is performed, the extrusion molding portion does not shift or slip out of the molding die, and the molding portion can be formed integrally with the end of the extrusion molding portion.
The sandwiching portion has a sandwiching core that abuts the end of the extrusion molding portion, and at least a part of the sandwiching core is formed of a material having low thermal conductivity, so that the heat from the molding die is formed at the end of the extrusion molding portion. Is hardly transmitted, and the amount of dents on the surface of the end can be almost eliminated. Therefore, it is possible to improve the appearance of the end portion of the extruded portion.

  According to the sixth aspect of the present invention, the extruded portion of the weather strip has a hollow seal portion, and the sandwiching portion of the molding die presses the insertion core inserted into the hollow seal portion and the outer surface of the hollow seal portion. A weatherstrip molding die that is formed from a sandwiching core that is sandwiched between the insert cores and is made of a material having low thermal conductivity.

According to the sixth aspect of the present invention, the extruded portion of the weather strip has a hollow seal portion, and the sandwiching portion of the molding die presses the insertion core inserted into the hollow seal portion and the outer surface of the hollow seal portion. A weatherstrip molding die that is formed from a sandwiching core that is sandwiched between the insert cores and is made of a material having low thermal conductivity. For this reason, the end of the hollow seal portion of the extrusion molding portion can be continuously located at the end of the cavity forming the hollow seal portion of the mold forming portion, and the inner surface and the outer surface of the hollow seal portion are connected to the hollow core. Even if the material constituting the mold forming part is securely clamped by the sandwiching core, the extrusion molded part does not slip or come off from the molding die, and the extrusion molded part and the mold forming part are surely connected. Can be connected.
Since the hollow core is formed of a material having low thermal conductivity, the heat of the molding die is hardly transmitted to the inner surface of the hollow seal portion of the extrusion molding portion, and the amount of dent on the surface of the end portion can be reduced. Therefore, it is possible to improve the appearance of the end portion of the extruded portion.

  According to the seventh aspect of the present invention, the extruded portion of the weather strip has a seal lip portion, and the sandwiching portion of the molding die is formed of a sandwich core that presses and sandwiches the outer surface and the inner surface of the seal lip portion. A weatherstrip molding die in which at least the pressing surface of the sandwiching core is formed of a material having low thermal conductivity.

  According to the seventh aspect of the present invention, the weather strip extrusion molding portion has a seal lip portion, and the molding die clamping portion is formed of a clamping core that presses and clamps the outer and inner surfaces of the sealing lip portion. A weatherstrip molding die in which at least the pressing surface of the sandwiching core is formed of a material having low thermal conductivity. For this reason, the amount of dents on the surface of the seal lip portion at the end of the weather strip can be reduced, and the appearance of the seal lip portion at the end of the extruded portion can be improved.

  According to the present invention of claim 8, the sandwiching core for sandwiching the seal lip portion is a weather strip molding die in which the core is formed of a material having low thermal conductivity.

  In the present invention of claim 8, the sandwiching core for sandwiching the seal lip is the weather strip molding die according to claim 7, wherein the core is formed of a material having low thermal conductivity. For this reason, the amount of dents on both the front surface and the back surface of the seal lip portion can be reduced, and the appearance of the seal lip portion at the end of the extruded portion can be improved.

  The present invention of claim 9 is a weather strip molding die in which a heat insulating space or a heat insulating material is provided between the sandwiching core and the molding die main body.

  The present invention of claim 9 is a weather strip molding die in which a heat insulating space or a heat insulating material is provided between the sandwiching core and the molding die main body. For this reason, the heat of the molding die body is less transmitted to the sandwiching core, the heat is less transmitted to the end of the extrusion molding part, and the dent amount on the surface of the end part can be reduced. The appearance of the end of the can be improved.

10. The weatherstrip molding die according to claim 5, wherein the material having low thermal conductivity is a heat resistant synthetic resin or a heat resistant rubber.

  The present invention of claim 10 is a weather strip molding die, wherein the material having low thermal conductivity is a heat resistant synthetic resin or a heat resistant rubber. For this reason, thermal conductivity is low compared to metal, the amount of heat conducted from the molding die to the surface of the end of the extrusion molding part can be reduced, and the mold can be lightened and handled. And the efficiency of the molding operation can be increased.

  The present invention has a sandwiching core in which a sandwiching portion of a molding die abuts against an end portion of an extrusion molding portion, and at least a part of the sandwiching core is formed of a material having low thermal conductivity. In addition, the heat from the molding die is hardly transmitted, the dents on the surface of the end portion of the extrusion molding portion can be almost eliminated, and the appearance of the end portion of the extrusion molding portion can be improved.

An embodiment of the present invention will be described with reference to FIGS.
FIG. 1 shows a molding die 20 for molding a corner portion of a door weather strip 10 according to an embodiment of the present invention, which is perpendicular to the longitudinal direction of the end portion of the corner portion in contact with the vertical side of the door weather strip 10. It is sectional drawing in a direction. FIG. 2 is a cross-sectional view in the direction parallel to the longitudinal direction of the end portion of the door weather strip 10.
FIG. 3 is a perspective view of the corner portion of the door weather strip 10 as seen from the vehicle interior direction, and FIG. 4 is a perspective view of the corner portion as seen from the vehicle exterior direction.
FIG. 5 is a partial plan view showing the arrangement of the core 29 arranged in the cavity 20 </ b> C of the molding die 20. FIG. 6 is a cross-sectional view in a direction perpendicular to the longitudinal direction of the corner portion that is in contact with the upper side of the end portion of the molding die 20 forming the door weather strip 10 and the door weather strip 10.

FIG. 7 is another embodiment of the present invention, and is a cross-sectional view in a direction perpendicular to the longitudinal direction of the end of the corner portion of the glass run 50 of the molding die 30 for molding the glass run 50.
FIG. 8 shows still another embodiment of the present invention, and is a cross section in a direction perpendicular to the longitudinal direction of the corner portion of the opening trim weather strip 60 of the molding die 40 for forming the opening trim weather strip 60. FIG.

First, the method for manufacturing the door weather strip 10 and its molding die 20 will be described. The manufacturing method of the glass run 50 and the opening trim weather strip 60 and the molding dies 30 and 40 will be described later.
As shown in FIGS. 3 and 4, the door weather strip 10 manufactured according to the present invention is formed by molding using extrusion molding parts 17, 17 and a molding die 20 formed by extrusion molding. 16 is composed. The extrusion molding parts 17 and 17 have two types, a part attached to the upper side of the door and a part attached to the vertical side, each having a different cross-sectional shape. The end portions of the two extrusion-molded portions 17 and 17 and the mold-molded portion 16 attached to the corner portion of the door frame are integrally connected.

  First, the manufacturing method of the part of the molding part 16 connected to the extrusion part 17 attached to the vertical side of the door frame and the molding die 20 will be described, and the extrusion part 17 and the molding part 16 attached to the upper side. Will be described later.

As shown in FIGS. 3 and 4, the extrusion molding portion 17 attached to the vertical side of the door frame includes an attachment base portion 11 attached to the door frame and a hollow seal portion 12 that contacts and seals the periphery of the vehicle body opening. It is composed of
The mounting base 11 is provided with a hollow mounting base hollow portion 13 in the vicinity of the center thereof. For this reason, while being able to reduce the weight of the door weather strip 10, the softness | flexibility of the attachment base 11 can be improved. A hollow seal portion 12 having an elliptical cross section is integrally formed from the mounting base portion 11. For this reason, the hollow seal portion 12 abuts on the periphery of the opening of the vehicle body and can be easily deformed to seal between the door.

  The molded part 16 has a cross-sectional shape similar to that of the extruded part 17 in the cross-sectional shape of the part continuous with the extruded part 17, and has an attachment base 11 and a hollow seal part 12. In the vicinity of the center of the corner of the mounting base 11, a core take-out hole 15 is formed to take out a core 29 of the molding die 20 described later. The end faces of the hollow seal portion 12 of the mold forming portion 16 and the hollow seal portion 12 of the extrusion forming portion 17 are connected, and the hollow portions are continuous. The core 29 is for forming the hollow shape of the hollow seal portion 12 of the mold forming portion 16, and is supported by a core holding plate 29a as shown in FIG. The core takeout hole 15 is formed by the core holding plate 29a.

The molding die 20 basically includes an upper die 21, a lower die 22, and a core 29 as shown in FIG.
The core 29 is installed in a cavity 20c formed between the upper mold 21 and the lower mold 22, as shown in FIG. Insertion cores 27 to be inserted into the hollow seal portion 12 of the extrusion molding portion 17 are attached to both ends of the core 29.

  Further, as shown in FIG. 5, the molding die 20 has a cavity 20 c for molding the mold molding part 16 and a clamping part 20 b for clamping the end part of the extrusion molding part 17. In the clamping part 20b of the molding die 20, as shown in FIG. 1, the upper mold 21 is composed of a first clamping core 23 that clamps the upper mold body 21b and the extrusion molding part 17, and the lower mold 22 is a lower mold. The second sandwiching core 24, the third sandwiching core 25, and the fourth sandwiching core 26 sandwich the body 22 b and the extrusion molding portion 17.

The first sandwiching core 23, the second sandwiching core 24, the third sandwiching core 25, and the insertion core 27 are formed of a material having low thermal conductivity, for example, a heat resistant synthetic resin or a heat resistant synthetic rubber. The fourth sandwiching core 26 is formed of a material constituting the other part of the molding die 20, for example, a metal such as a steel material.
Note that only the first sandwiching core 23, the second sandwiching core 24, and the third sandwiching core 25 may be formed of a material having low thermal conductivity, or only the insertion core 27 may be formed of a material having low thermal conductivity. Good.

When at least part of the core of the sandwiching portion 20b of the molding die 20 is formed of a material having low thermal conductivity, the mold forming portion 16 is integrally molded at the end of the extrusion molding portion 17 sandwiched by the sandwiching portion 20b. In this case, the molding die 20 is heated, but the heat of the molding die 20 is hardly transmitted, and the amount of dent remaining on the surface of the end portion can be reduced. Therefore, the appearance of the end portion of the extruded portion 17 can be improved.
Since the fourth sandwiching core 26 sandwiches the back surface of the mounting base 11 of the extrusion molding portion 17, it does not affect the appearance even if a recess is formed on the surface, and thus constitutes the other part of the molding die 20. Can be made of material.

The material having low thermal conductivity can be formed of a heat resistant synthetic resin or synthetic rubber. Examples of the heat-resistant synthetic resin include polyfluorinated ethylene (PTFE), polyfluoroalkoxylene (PFA), polyimide (PI), polyphenylene sulfide (PPS), polyether ether ketone (PEEK), polybenzimidazole ( PBI) or the like can be used.
As the heat-resistant synthetic rubber, fluorine rubber, silicon rubber, or the like can be used. The heat-resistant synthetic resin or synthetic rubber may be a solid material, but it is more preferable to use a sponge material that is independently foamed.

  A heat insulating space 28 is provided between the first sandwiching core 23 and the main body 21 b of the upper mold 21 of the molding die 20. For this reason, the first sandwiching core 23 is in contact with the main body 21b of the upper mold 21 only at the corners, so that heat from the upper mold 21 is difficult to be transmitted. For this reason, coupled with the fact that the first sandwiching core 23 is formed of a material having low thermal conductivity, heat is not easily transmitted to the surface sandwiching the end portion of the extruded portion 17 of the first sandwiching core 23, and the extrusion The amount of depression on the surface of the end portion of the molded portion 17 can be reduced.

Similarly, in the second sandwiching core 24 and the third sandwiching core 25, a heat insulating space 28 is provided between the main body of the lower mold 22 of the molding die 20. For this reason, as with the first sandwiching core 23, heat is not easily transmitted to the surface sandwiching the end of the extruded portion 17, and the amount of dent remaining on the surface of the end of the extruded portion 17 can be reduced. .
In addition, even if a heat insulating material such as ceramic is provided in the heat insulating space 28 instead of the space, the heat can be hardly transmitted to the surface sandwiching the end portion of the extruded portion 17.

Next, a method for manufacturing the molded part 16 will be described.
First, the end of the extrusion molding portion 17 of the door weather strip 10 cut to a predetermined dimension is inserted into the insertion core 27 at the tip of the core 29 of the molding die 20. Further, the upper extrusion molding portion 17 described later is inserted into the insertion core 27 at the other end of the core 29. At that time, the insertion core 27 and the core protruding portion 29b are inserted into the hollow seal portion 12 of the extrusion molding portion 17 and the attachment base portion hollow portion 13 of the attachment base portion 11, respectively. Then, as shown in FIG. 5, the core 29 is disposed in the cavity 20 c of the lower mold 22 of the molding die 20.

Thereafter, when the upper die 21 of the molding die 20 is closed, the molding die 20 forms a cavity 20c, and the end portions of the extrusion molding portions 17 and 17 on the vertical side and the upper side are sandwiched by the clamping portions 20b and 20b. Is pinched.
Then, a material for forming the molding part 16 is injected or injected into the cavity 20c. When the material is rubber, the molding die 20 is heated to vulcanize the rubber, and if necessary, foamed. At the time of this vulcanization and foaming, the mold forming part 16 and the ends of the extrusion molding parts 17 and 17 can be bonded by the heat, and the mold molding part 16 and the extrusion molding parts 17 and 17 can be formed integrally.

  At this time, as described above, the first sandwiching core 23, the second sandwiching core 24, and the third sandwiching core 25 of the sandwiching portion 20b are formed of a material having low thermal conductivity and / or the insertion core 27 of the core 29 is heated. Since it is formed of a material having low conductivity, heat is not easily transmitted to the surface of the end portion of the sandwiched extruded portion 17, and as a result, the amount of dent remaining on the surface can be reduced. Therefore, the appearance of the end portion of the extruded portion 17 can be improved.

Next, the connection part of the extrusion molding part 17 and the molding part 16 attached to the upper side of a door frame is demonstrated.
As shown in FIGS. 3 and 4, the extrusion molding portion 17 attached to the upper side of the door frame is formed on the vehicle inner side from the attachment base portion 11 and the attachment base portion 11 attached to the door frame and abuts on the peripheral edge of the vehicle body opening. And a seal lip portion 14 that is formed on the vehicle outer side from the mounting base portion 11 and seals against the periphery of the vehicle body opening of the vehicle body.
The point from which the seal lip part 14 is formed from the attachment base 11 differs from the extrusion molding part 17 attached to the vertical side of a door frame.

A portion of the mold forming portion 16 that is continuous with the extrusion molding portion 17 has a cross-sectional shape similar to that of the extrusion molding portion 17, and includes an attachment base portion 11, a hollow seal portion 12, and a seal lip portion 14.
As shown in FIG. 6, the structures of the insertion core 27 and the third sandwiching core 25 of the molding die 20 that form the attachment base portion 11 and the hollow seal portion 12 are the same. The sandwiching portion 20b of the molding die 20 that sandwiches the seal lip portion 14 is a portion of the first sandwiching core 23 and the second sandwiching core 24, and the first sandwiching core 23 and the second sandwiching core 24 having low thermal conductivity. Therefore, the amount of dent remaining on the surface of the seal lip portion 14 can be reduced. Therefore, the appearance of the seal lip portion 14 can be improved.

Next, a manufacturing method for molding the corner portion of the glass run 50 and the molding die 30 will be described with reference to FIG. Similar to the door weather strip 10, the glass run 50 includes an extrusion molding part that is molded by extrusion molding and a mold molding part that is molded by molding using the molding die 30.
The extruded portion of the glass run 50 is a U-shaped cross-sectional glass composed of a vehicle outer side wall 51 having a U-shaped cross section, a vehicle inner side wall 52, and a bottom wall 53 connecting the vehicle outer side wall 51 and the vehicle inner side wall 52. A vehicle body side seal lip 54, a vehicle interior side seal lip 55, and a vehicle exterior side wall 51, which are obliquely extended from respective tips of the vehicle body side wall 51 and vehicle interior side wall 52 toward the inside of the glass run body. The vehicle interior side wall 52 is formed of a vehicle exterior side wall 51 and a vehicle interior side cover lip 57 extending substantially parallel to the vehicle interior side wall 52 from the front end.

  The portion of the glass run 50 where the mold part is continuous with the extrusion part has a cross-sectional shape similar to that of the extrusion part, and is a U-shaped side wall 51, a side wall 52, and a side wall. A glass run body having a U-shaped cross section composed of 51 and a bottom wall 53 connecting the vehicle interior side wall 52, a vehicle exterior seal lip 54, a vehicle interior seal lip 55, a vehicle exterior cover lip 56, and a vehicle interior cover lip 57. And have.

As shown in FIG. 7, the molding die 30 basically includes an upper die 31, a lower die 32, a middle plate 36 and a core 37.
The intermediate plate 36 is inserted into the space between the vehicle outer side wall 51 and the vehicle outer side cover lip 56 and the space between the vehicle inner side wall 52 and the vehicle inner side cover lip 57 at the end of the extruded portion of the glass run 50. The The core 37 is inserted into the glass run body. In sandwiching the end portion of the extrusion portion of the glass run 50, the surface of the glass run 50 is sandwiched by the first sandwiching core 33, the second sandwiching core 34, and the third sandwiching core 35, and the intermediate plate 36 and the core 37 The inner surface and the rear surface of the glass run 50 are sandwiched.

Since all of the first sandwiching core 33, the second sandwiching core 34, and the third sandwiching core 35 are formed of a material having low thermal conductivity, it is possible to reduce the transfer of heat to the glass run 50. It is possible to reduce the amount of dents remaining on the surfaces of the 50 exterior seal lips 54, the interior seal lip 55, the exterior cover lip 56, and the interior cover lip 57. Therefore, the appearance can be improved. Furthermore, if both the intermediate plate 36 and the core 37 are formed of a material having low thermal conductivity, the amount of dent remaining on the surface can be further reduced.
Further, since the first sandwiching core 33, the second sandwiching core 34, and the third sandwiching core 35 are in contact with the main body of the upper mold 31 and the lower mold 32 of the molding die 30, a heat insulating space 38 is formed. Further, it is possible to minimize heat transfer from the upper mold 31 and the lower mold 32 of the molding die 30 to the first sandwiching core 33, the second sandwiching core 34, and the third sandwiching core 35.

  Next, a manufacturing method for molding the corner portion of the opening trim weather strip 60 and the molding die 40 will be described. As with the door weather strip 10, the opening trim weather strip 60 includes an extrusion molding portion and a mold molding portion that is molded by the molding die 40.

The opening-trimmed weather strip 60 has an extrusion-molded portion including a trim portion 61 having a U-shaped cross section, a hollow seal portion 62 formed on a side surface of the trim portion 61, and a cover lip portion 63 formed on the upper surface of the trim portion 61. It is configured.
The portion of the opening trim weather strip 60 that is continuous with the extruded portion of the molded portion has a cross-sectional shape similar to that of the extruded portion and has a U-shaped cross section, a hollow seal portion 62, and a cover. The lip portion 63 is used.

As shown in FIG. 8, the molding die 40 includes an upper die 41, a lower die 42, and a core 49 having an insertion core portion 47. The first sandwiching core 43, the second sandwiching core 44, the third sandwiching core 45, and the insertion core portion 47 are made of a synthetic resin having low thermal conductivity.
At the end of the extruded portion of the opening trim weather strip 60, the insertion core portion 47 is inserted into the hollow seal portion 62 of the opening trim weather strip 60. The outer surface of the hollow seal portion 62 is sandwiched between the first sandwiching core 43 and the second sandwiching core 44.

The cover lip part 63 is sandwiched between the second sandwiching core 44 and the third sandwiching core 45.
Since the first sandwiching core 43, the second sandwiching core 44, the third sandwiching core 45, and the insertion core portion 47 are all formed of a material having low thermal conductivity, the hollow seal portion 62 of the opening trim weather strip 60 is provided. Therefore, it is possible to reduce heat transfer to the cover lip portion 63, and to reduce the amount of dent remaining on the surfaces of the hollow seal portion 62 and the cover lip portion 63 of the opening trim weather strip 60. Therefore, the appearance can be improved.

  The molding material for the door weather strip 10, the glass run 50, and the opening trim weather strip 60 is synthetic rubber. For example, EPDM rubber or the like is used for synthetic rubber. In order to improve flexibility, it is preferable to foam these materials and use them as sponge materials.

FIG. 3 is a cross-sectional view in a direction perpendicular to the longitudinal direction of the corner portion in contact with the vertical side of the door weather strip in the molding die for forming the corner portion of the door weather strip according to the embodiment of the present invention. FIG. 3 is a cross-sectional view in a direction parallel to the longitudinal direction of the corner portion in contact with the upper side of the door weather strip in the molding die for molding the corner portion of the door weather strip according to the embodiment of the present invention. It is the perspective view seen from the in-vehicle direction of the corner part of the door weather strip manufactured by the embodiment of the invention. It is the perspective view seen from the vehicle exterior direction of the corner part of the door weather strip manufactured by embodiment of this invention. It is a fragmentary top view which shows arrangement | positioning of the core of the shaping | molding die which shape | molds the corner part of the door weather strip which is embodiment of this invention. It is sectional drawing in the direction at right angles to the longitudinal direction of the corner part which contact | connects the upper side of the door weather strip of the metal mold | die for forming which forms the corner part of the door weather strip which is embodiment of this invention. It is sectional drawing in the direction orthogonal to the longitudinal direction of the glass run of the metal mold | die for shaping | molding the corner part of the glass run which is embodiment of this invention. It is sectional drawing in the direction orthogonal to the longitudinal direction of the opening trim weather strip of the metal mold | die which shape | molds the corner part of the opening trim weather strip which is embodiment of this invention. It is a perspective view of the door weather strip manufactured by the conventional method. It is sectional drawing in the direction orthogonal to the longitudinal direction of the corner part of the door weather strip of the metal mold | die for shape | molding the conventional door weather strip. It is sectional drawing in the direction orthogonal to the longitudinal direction of the corner part of the door weather strip of the metal mold | die for shaping | molding the other conventional door weather strip. It is sectional drawing in the direction parallel to the longitudinal direction of the door weather strip of the metal mold | die for shape | molding the other conventional door weather strip. It is an expanded sectional view of the part which clamps the edge part of the door weather strip of FIG. It is an expanded sectional view of the clamping part of the edge part of the conventional door weather strip.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Door weather strip 11 Mounting base 12 Hollow seal part 14 Seal lip part 16 Molding part 17 Extrusion part 20, 30, 40 Mold 23,33,43 1st clamping core 24,34,44 2nd clamping Core 25, 35, 45 Third sandwich core 28, 38, 48 Thermal insulation space 27, 47 Insert core 29, 37, 49 Core 50 Glass run 60 Opening trim weather strip

Claims (10)

In a method of forming a weather strip in which a mold part is integrally formed by molding at an end of an extrusion part formed by extrusion molding,
A clamping core for clamping the end of the extrusion molding part to the molding die for molding and a cavity for forming the molding part are provided, and the clamping core is in contact with the end of the extrusion molding part And at least a part of the sandwiching core is formed of a material having low thermal conductivity,
A method of forming a weather strip, in which after the end of the extrusion molding part is clamped by the clamping part, a rubber material constituting the mold molding part is injected or injected into the cavity, and then the rubber is cross-linked and molded.   The extruded part has a hollow seal part, and the clamping part of the mold has an insertion core formed of a material having low thermal conductivity inserted into the hollow seal part, and an outer surface of the hollow seal part. When forming the hollow seal part of the mold part that is formed from the sandwiching core to be sandwiched and is continuous with the hollow seal part of the extrusion part, the outer surface of the hollow seal part of the extrusion part is pressed by the insertion core and the sandwich core. After being sandwiched, the rubber material constituting the mold part is injected or injected into the mold cavity where the core formed integrally with the insertion core is disposed, and then the rubber is crosslinked. The weatherstrip molding method according to claim 1, wherein the molding is performed.   The extrusion molding portion has a seal lip portion, and the molding die has a sandwich core that abuts on and sandwiches both surfaces of the seal lip portion, and the sandwich core is formed of a material having low thermal conductivity. The method of forming a weather strip according to 1.   The method of forming a weather strip according to any one of claims 1 to 3, wherein the end portion of the extrusion-molded portion is compressed and clamped to a thickness of 0.1 mm to ½ of its thickness. In a weatherstrip molding die for integrally molding a molded part by molding at the end of an extruded part of a weatherstrip molded by extrusion,
The molding die has a sandwiching portion for sandwiching an end portion of the extrusion molding portion and a cavity for forming the molding portion, and the sandwiching portion is in contact with an end portion of the extrusion molding portion. A weatherstrip molding die, wherein at least a part of the sandwiching core is made of a material having low thermal conductivity.   The extruded portion of the weather strip has a hollow seal portion, and the sandwiching portion of the molding die sandwiches the insertion core inserted into the hollow seal portion and presses and clamps the outer surface of the hollow seal portion. The weatherstrip molding die according to claim 5, wherein the mold is formed of a core, and the insertion core is formed of a material having low thermal conductivity.   The extruded portion of the weather strip has a seal lip portion, and the sandwiching portion of the molding die is formed of a sandwich core that presses and sandwiches the outer surface and the inner surface of the seal lip portion. The weatherstrip molding die according to claim 5, wherein at least the pressing surface is formed of a material having low thermal conductivity.   The mold for forming a weather strip according to claim 7, wherein the sandwiching core for sandwiching the seal lip portion is formed of a material having low thermal conductivity.   The weatherstrip molding die according to any one of claims 5 to 8, wherein a heat insulating space or a heat insulating material is provided between the sandwiching core and the molding die main body.   The weatherstrip molding die according to any one of claims 5 to 9, wherein the material having low thermal conductivity is a heat resistant synthetic resin or a heat resistant rubber.

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