JP2012040966A - Weather strip and method for producing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure of a weather strip which even when the work of sticking another sealing material such as an EPT-sealer is eliminated, exhibits a function equivalent to a function in the case in which the other sealing material is stuck.SOLUTION: A highly-foamed soft sealing material 13 is buried in a bottom wall part 5 of a corner-shaped molded part 2E of a door glass run 2 which is used as a part to be press-contacted with a door sash 1b, together with a solid material 14 on both sides of the highly-foamed soft sealing material by an insert molding method. The highly-foamed soft sealing material 13 is a spongy highly foamed body of the rubber or thermoplastic elastomer equal to the existing EPT-sealer or a so-called coking sponge. Since the solid material 14 is interposed, the adhesiveness of a base material of the bottom wall part 5 to the highly-foamed soft sealing material 13 and the shape retentivity can be made better.

Description

  The present invention relates to a structure of a weather strip represented by a door glass run and a door weather strip, and a manufacturing method thereof.

  For example, in a door weather strip that is installed around a vehicle door and elastically contacts the door opening edge on the vehicle body when the door is closed, the extruded general parts are closed looped at the corner mold part. However, since it is inevitable to set a hole for extracting the core at the time of molding in the mounting base of the corner mold molding part, it is necessary to close or seal the gap after molding. For the purpose of ensuring the property, a high-foaming soft and low specific gravity sponge-like sealing material called an eptosealer or caulking sponge is attached to the part.

  However, since the attachment of such a so-called separate seal material has to rely on manual work, a technique that eliminates the need for such a seal material is proposed in Patent Document 1.

  According to the description in Patent Document 1, when the corner portion is molded, the corner mounting base is connected to the roof base and the vertical base mounting base so as to be continuous, and the corner base is connected to the corner base. It is supposed that a low specific gravity sponge portion is integrally formed by vulcanization adhesion by injecting a predetermined material.

JP 2009-227241 A

  However, in the molding of the low specific gravity sponge part by mold molding, there is a limit to the control of the foamed state and thus the specific gravity, and the variation is large, so it is possible to integrally mold the sponge part with a high foaming and low specific gravity as expected. It cannot be done, and there is still room for improvement.

  The present invention has been made paying attention to such a problem, and can eliminate the work of attaching a so-called separate seal material by hand as described above, and has a highly foamed and soft string shape. A weather strip formed by integrally molding a highly foamed soft sealing material and a method for manufacturing the weather strip are provided.

  The present invention basically has a structure of a weather strip formed by injecting a resin material or a rubber-based material into a mold as described in claim 1, and is a portion in pressure contact with a mating member Further, the present invention is characterized in that a string-like high foaming soft sealing material is embedded by insert molding together with a solid material interposed between the high foaming soft sealing material and a weather strip substrate.

  Here, the high foam soft sealing material refers to a sponge-like high foam of rubber or thermoplastic elastomer equivalent to the above-described eptosealer or caulking sponge. In addition to the high foam soft seal material, the solid material is used to prevent crush deformation in the mold of the high foam soft seal material and to adhere the high foam soft seal material to the base material of the weather strip. This is to ensure the sex.

  According to a second aspect of the present invention, the weather strip is a door glass run having a substantially U-shaped cross section that is mounted inside the door sash and receives the door glass, and connects the general portions of the door glass run. A string-like highly foamed soft sealing material is embedded in a bottom wall portion of the corner mold forming portion together with a solid material by insert molding.

  According to a third aspect of the present invention, the weather strip is a door weather strip that is mounted around the vehicle door and elastically contacts the door opening edge of the vehicle body when the door is closed. A string-like highly foamed soft sealing material is embedded together with a solid material by insert molding in an attachment base portion of a corner-shaped molded portion that connects the portions.

  According to a fourth aspect of the present invention, the weather strip is a body side weather strip that is attached to a door opening edge on the vehicle body side and elastically contacts the door when the door is closed. A string-like highly foamed soft sealing material is embedded together with a solid material by insert molding in a seal lip of a corner-shaped molding portion that connects the two.

  Invention of Claim 5 is a manufacturing method of the weather strip in any one of Claims 2-4, Comprising: The highly foamed soft sealing material and the solid material are integrally molded beforehand, These high foaming After positioning a soft sealing material and a solid material as inserts in the product shape part space of the mold, the corner shape forming part is formed by injecting a material to be a corner mold forming part into the product shape part space. Features.

  The invention according to claim 6 is a hood side weather strip that is disposed on the inner surface of the front fender on the engine room side and seals the inside and outside of the engine room by elastic contact of the hood side portion when the hood is closed. A string-like highly foamed soft sealing material is embedded together with a solid material by insert molding in a lower part of a cover plate having a hollow sealing lip at the upper part.

  In this case, more specifically, as described in claim 7, the seal lip is detachably attached to the upper portion of the cover plate.

  The invention according to claim 8 is the weather strip manufacturing method according to claim 7, wherein the high foaming soft sealing material and the solid material are integrally formed in advance, and the high foaming soft sealing material and the solid material are solidly formed. The material is positioned in the product shape part space of the mold as an insert, and then the material to be the cover plate is injected into the product shape part space to form the cover plate.

  Therefore, in at least the first aspect of the invention, when the weather strip itself is molded with the mold, the string-like high foam soft seal material set in the mold as an insert in advance is integrated with the solid material. It will be embedded and integrally molded as part of the weatherstrip. As a result, a highly foamed soft sealing material is inevitably attached to a part of the weather strip, and the so-called separate sealing material sticking operation by hand as described above can be eliminated.

  According to the present invention, since the weather strip is accompanied by the highly foamed soft sealing material molded integrally with the weather strip, the manual work of attaching the so-called separate sealing material can be eliminated. In addition, since the function of the highly foamed soft sealing material attached to the weather strip alone is exhibited, the functions equivalent to the case of pasting a separate sealing material, that is, the sealing function and the gap closing function are sufficiently provided. It can be secured.

  Furthermore, since the solid material is interposed together with the high foam soft seal material, the adhesive property of the high foam soft seal material to the weather strip is good, and the desired function can be stably maintained.

Explanatory drawing which shows schematic structure of the door of the motor vehicle to which the weather strip which concerns on this invention is applied. The 1st Embodiment of the weather strip which concerns on this invention is shown, and the expansion perspective view of the corner type molding part in the door glass run shown in FIG. Cross-sectional explanatory drawing which follows the AA line of FIG. The principal part expansion explanatory drawing which shows an example of the metal mold | die for shape | molding the corner type molding part shown in FIG. The 2nd Embodiment of the weather strip which concerns on this invention is shown, and the expansion perspective view of the corner type | mold formation part in the door weather strip shown in FIG. Explanatory sectional explanatory drawing in alignment with the BB line of FIG. The 3rd Embodiment of the weather strip which concerns on this invention is shown, and the expansion perspective view of the corner type molding part in a body side weather strip. Explanatory sectional explanatory drawing which follows the CC line of FIG. The front perspective view of a motor vehicle. The principal part perspective view at the time of the hood opening in the F section of FIG. Explanatory sectional explanatory drawing which follows the DD line | wire of FIG. The disassembled perspective view of the principal part of FIG.

  FIG. 1 shows a schematic structure of an automobile door to which a weather strip according to the present invention is applied.

  As shown in the figure, a door glass run 2 having a substantially U-shaped cross section is mounted on the inner peripheral side of a door sash 1b that forms the door 1 together with the door body 1a. The interior and exterior of the vehicle are sealed while guiding and supporting the glass 3 so that it can be raised and lowered. A door weather strip 4 is mounted in a closed loop on the outer peripheral side of the door sash 1b so as to surround the door sash 1b and the door body 1a. When the door is closed, the door weather strip 4 elastically contacts the door opening edge on the vehicle body side to seal the outside of the vehicle interior. In FIG. 1, in order to clarify the shape of the door glass run 2, the door sash 1b itself is illustrated in a perspective manner.

  FIGS. 2-4 has shown the example of the previous door glass run 2 as 1st Embodiment of the weather strip which concerns on this invention.

  As is apparent from FIG. 2 in addition to FIG. 1, the door glass run 2 is mounted on the inner periphery of the door sash 1b and receives the door glass 3 so as to be movable up and down. The roof is a general part (extrusion part). Similarly to the corresponding portion 2A, the vertical side portions 2B and 2C before and after the general portion (extrusion forming portion) are similarly connected via the front and rear corner mold forming portions 2D and 2E.

  FIG. 2 is an enlarged view of the rear corner molding portion 2E of FIG. 1 viewed from the vehicle interior side, FIG. 3 is a cross-sectional view taken along the line AA of FIG. A main body portion 8 having a substantially U-shaped cross section including a bottom wall portion 5 and side wall portions 6 and 7 on the vehicle interior side and vehicle exterior side on both sides of the bottom wall portion 5, and from the front ends of the side wall portions 6 and 7, The inner seal lip 9 and the outer seal lip 10 are formed so as to project obliquely toward the inner side of the U-shaped space, and the bottom seal lip 11 is formed so as to project at a portion close to the bottom wall portion 5. The roof equivalent part 2A and the rear vertical side part 2C are connected to the corner mold part 2E through joint lines 12a and 12b, respectively.

  As shown in FIG. 3, a string-like highly foamed soft sealing material 13 is embedded in the bottom wall portion 5 of the corner mold forming portion 2 </ b> E together with the solid material 14. The highly foamed soft sealing material 13 and the solid material 14 extend from one joining line 12a to the other joining line 12b of the corner mold part 2E, and are disposed over the entire length in the longitudinal direction of the corner mold part 2E. It is provided and exposed in a form that slightly protrudes on both the front and back surfaces of the bottom wall 5.

  This highly foamed soft sealing material 13 is a high foamed foam having a low foam and a low foam of rubber or thermoplastic elastomer equivalent to the above-mentioned eptosealer or caulking sponge. A solid material 14 made of rubber or thermoplastic elastomer is integrally preformed on both surfaces of 13 by extrusion molding, and the solid material 14 is integrated as a part of the bottom wall portion 5 by an insert molding method to be described later. Is formed. In addition, the molding of the high foam having a low specific gravity by the extrusion molding can control the foamed state and the specific gravity, and the variation is small as compared with the case of the mold molding.

  In this case, the mold forming part 2E including the bottom wall part 5 is formed of a material having a good affinity with the solid material 14, such as rubber, thermoplastic elastomer, or foam thereof (so-called sponge-like material).

  As shown in FIG. 3, when the door glass run 2 is fitted to the mating door sash 1b and attached, the bottom wall portion 5 including the high foam soft seal material 13 and the solid material 14 becomes the door sash 1b. Will be in pressure contact.

  The structure of the corner mold part 2E is basically the same for the front corner mold part 2D shown in FIG.

  In order to form such a door glass run 2, as is well known, a roof equivalent part 2A which is a general part (extrusion part) and a vertical part are formed in a product shape part space of a mold for forming a corner mold part 2E. By inserting the end portions of the side portions 2C and injecting the material to be the corner mold forming portion 2E into the remaining product shape portion space, the corner corresponding to the roof equivalent portion 2A and the vertical side portion 2C is connected. Mold forming part 2E is formed.

  At that time, as shown in FIG. 4, a solid material 14 is previously pasted on both surfaces of a string-like highly foamed soft sealing material 13 in a part of the product shape portion space R of a mold 15 composed of a plurality of mold elements. Positioning the combined material as an insert, and subsequently injecting a material to be the corner mold forming portion 2E, and molding the corner mold forming portion 2E together with the high foam soft seal material 13 and the solid material 14 And

  That is, the corner mold forming portion 2E is formed in such a manner that the solid material 14 is used as a joint portion and the highly foamed soft sealing material 13 and the solid material 14 are included in a part of the bottom wall portion 5. Since the solid material 14 is integrally extruded on both surfaces of the high foam soft seal material 13 in advance, the high foam soft seal material 13 is not easily deformed even if it is subjected to the injection pressure of the material. In addition, the adhesion between the bottom wall portion 5 and the highly foamed soft sealing material 13 is also good.

  Therefore, according to the door glass run 2 having such a structure, the highly foamed soft sealing material 13 is arranged on the bottom wall portion 5 over the entire length in the longitudinal direction of the corner mold forming portion 2E, so that a separate seal is provided as in the conventional case. The desired function of the highly foamed soft sealing material 13 is exhibited without sticking the material. Incidentally, conventionally, a separate sealing material has been manually attached to the bottom wall portion 5 at the same position as the highly foamed soft sealing material 13 after molding. Accordingly, in the present embodiment, the highly foamed soft sealing material 13 is excellent in flexibility and shape followability as its characteristics, so that it closely follows the mounting surface shape on the door sash 1b side as shown in FIG. The necessary and sufficient sealing performance and gap closing function are exhibited.

  5 and 6 show an example of the previous door weather strip 4 as the second embodiment of the weather strip according to the present invention.

  As is apparent from FIG. 1, the door weather strip 4 is mounted in a closed loop around the door sash 1b and the door body 1a. The roof equivalent portion 4A, which is a general portion (extruded portion), and other portions. A general part (extrusion molding part) 4B is connected via a front corner molding part (not shown) and a rear corner molding part 4C.

  FIG. 5 is an enlarged view of the corner-shaped molded portion 4C of FIG. 1 as viewed from the outside of the passenger compartment, and FIG. 6 is a sectional view taken along the line BB of FIG. The parts 4A and 4B are provided with a hollow mounting base 16 and a hollow seal lip 17, whereas the roof equivalent part 4A has a tongue-like seal lip in addition to the hollow mounting base 18 and the hollow seal lip 19. 20 and a sub seal lip 21 are provided. Then, the roof equivalent part 4A having a different cross-sectional shape and the other general part 4B are smoothly continued while the cross-sectional shape is gradually changed at the corner-shaped forming part 4C.

  Here, the general part 4A including the roof equivalent part 4B is formed of rubber or thermoplastic elastomer together with the corner mold part 4C. As is apparent from FIG. 5, the corner part of the mounting base 18 in the roof equivalent part 4A. A soft seal bead portion 22 made of foam of rubber or thermoplastic elastomer (so-called sponge-like material) is formed.

  In the corner mold forming part 4C, as shown in FIG. 6, since the hollow part of the mounting base part 18 and the hollow part of the hollow seal lip 19 are formed in combination with the core, As shown in FIG. 5, the presence of a core punching hole 23 for core extraction is unavoidable in the bottom wall portion 18 of the corner mold forming portion 4C after molding.

  A string-like highly foamed soft sealing material 13 is embedded together with the solid material 14 in the mounting base portion 18 of the corner mold forming portion 4C so as not to interfere with the core punching hole 23. As shown in FIG. 5, the high foam soft sealing material 13 and the solid material 14 extend from one joining line 24a to the other joining line 24b of the corner mold forming part 4C, and substantially form the corner mold forming part 4C. Are disposed over the entire length in the longitudinal direction of the mounting base 18 and are exposed in a slightly protruding manner on both the front and back surfaces of the mounting base 18. This highly foamed soft sealing material 13 is a high foamed foam having a low foam and a low foam of rubber or thermoplastic elastomer equivalent to the above-mentioned eptosealer or caulking sponge. A solid material 14 made of rubber or thermoplastic elastomer is integrally formed on both surfaces of 13 by extrusion molding, and the solid material 14 is integrally formed as a part of the mounting base 18 by an insert molding method with a joining portion. It is.

  In this case, the corner mold part 4C including the mounting base 18 is formed of a material having a good affinity with the solid material 14, for example, rubber, thermoplastic elastomer or foam thereof (so-called sponge-like material). Further, as shown in FIG. 5, in order to ensure the continuity between the seal bead portion 22 on the roof equivalent portion 4A side described above and the highly foamed soft seal material 13 in the bottom wall portion 18 of the corner mold forming portion 4C. In addition, a sponge-like and low specific gravity high-foam 25 called a conventional ept sealer is a little pasted in such a manner that the high-foaming soft sealing material 13 is extended after the corner-shaped molding portion 4C is formed.

  Then, as shown in FIG. 6, when the corner-shaped molded portion 4C of the door weather strip 4 is fitted and attached to the mating door sash 1b, the mounting including the high foam soft seal material 13 and the solid material 14 is provided. The base 18 comes into pressure contact with the door sash 1b.

  The structure of the corner mold part 4C is basically the same for the front corner mold part hidden in FIG.

  In order to form such a door weather strip 4 using the high foam soft seal material 13 and the solid material 14 as inserts, basically the same molding method as that for the door glass run 2 shown in FIG. 4 is used.

  Therefore, conventionally, it is necessary to manually attach a separate sealing material after molding the corner mold forming portion 4C at the same position as the highly foamed soft sealing material 13, but the affixing operation of this separate sealing material is necessary. In the door weather strip 4 which is the second embodiment that can be eliminated, the same effects as those of the first embodiment can be obtained.

  7 and 8 show an example of a body side weather strip (welt body side weather strip) 30 as a third embodiment of the weather strip according to the present invention.

  As is apparent from FIG. 7, the body side weather strip 30 is mounted not on the door 1 side but on the door opening edge on the vehicle body side in a closed loop shape or an incomplete closed loop shape. The door sash 1b and a part of the door body 1a are brought into elastic contact with the door weather strip 4 on the vehicle interior side to seal the exterior of the vehicle interior.

  Then, the general portions 30A and 30B composed of the welt portion 31 having a substantially U-shaped cross section and the hollow seal lip 32 are converted into a corner-shaped molded portion 30C composed of a welt portion 31 and a seal lip 33 each having a substantially U-shaped cross section. The connection lines 34a and 34b are connected. However, the seal lip which is the main element in the general portions 30A and 30B is the hollow seal lip 32, whereas the seal lip is not hollow but is a tongue-shaped seal lip 33 in the corner-shaped molded portion 30C. . As shown in FIG. 8, a string-like highly foamed soft sealing material 13 is embedded together with the solid material 14 on the inner side surface of the seal lip 33 in the corner-shaped molding portion 30 </ b> C. This is in order to suppress the occurrence of sound coming off and hitting due to the bending deformation of the seal lip 33 when the door is opened and closed.

  These highly foamed soft sealing material 13 and solid material 14 extend from one joining line 34a to the other joining line 4b of the corner mold part 30C, and are arranged over the entire length in the longitudinal direction of the corner mold part 30C. It is installed. This highly foamed soft sealing material 13 is a high foamed foam having a low foam and a low foam of rubber or thermoplastic elastomer equivalent to the above-mentioned eptosealer or caulking sponge. 13, a solid material 14 of rubber or thermoplastic elastomer is integrally preformed by extrusion molding, and the solid material 14 is integrally formed on the inner surface of the seal lip 33 by the insert molding method described above as a joint. It is formed.

  In this case, the molded part 30C including the seal lip 33 is formed of a material having a good affinity with the solid material 14, for example, rubber, thermoplastic elastomer or foam thereof (so-called sponge-like material).

  Therefore, conventionally, it is necessary to manually attach a separate sealing material after forming the corner-shaped molded portion 30C at the same position as the high foam soft sealing material 13, whereas the separate sealing material is applied. In the body weather strip 30 which is the third embodiment that can be eliminated, the same effects as those of the first and second embodiments can be obtained.

  9 to 12 show an example of a hood side weather strip 41 as a fourth embodiment of the weather strip according to the present invention.

  As shown in FIGS. 9 to 11, hood side weather strips 41 are disposed on the left and right side portions of the hood 40 of the automobile in order to prevent heat from blowing out from the engine room. In the hood side weather strip 41, a resin cover plate 43 is disposed along the front-rear direction on the inner side surface of the hood ridge panel on the vehicle body side or the front fender 42, and a mounting flange portion 43a on the upper surface of the cover plate 43 is provided. A hollow seal rubber 45 made of rubber or the like is attached as a seal lip.

  As shown in FIG. 12, the seal rubber 45 is detachably fixed by fitting and locking the mounting holes 47 on the seal rubber 45 side to a plurality of clips 46 that are integrally formed in advance on the cover plate 43 side. Is done. When the hood 40 is closed, as shown in FIG. 11, the inside and outside of the engine room are sealed by the hood inner panel 40 a elastically contacting the seal rubber 45.

  On the other hand, the cover plate 43 covers the upper part of the front fender arch 48 widely in order to cover the panel paint color such as the front fender arch 48 exposed in the engine room and improve the appearance. A seating flange portion 43 b at the lower end is seated on the front fender arch 48. The seated flange portion 43b employs the same highly foamed soft sealing material 13 as in the previous embodiments from the viewpoint of preventing abnormal noise generation and gap generation due to vehicle body vibration.

  More specifically, when the cover plate 43 is molded by injection molding using a mold or the like, the solid material 14 of rubber or thermoplastic elastomer is integrally extruded on both surfaces of the highly foamed soft sealing material 13. Then, the solid material 14 is integrally formed as a part of the seat flange portion 43a by the insert molding method described above as a joint portion.

  Therefore, in the past, it was necessary to manually attach a separate seal material after molding the cover plate 43 at the same position as the highly foamed soft seal material 13, whereas the affixing operation of this separate seal material was abolished. In the hood side weather strip 41 which is the fourth embodiment that can be obtained, the same effects as those of the previous embodiments can be obtained.

DESCRIPTION OF SYMBOLS 1 ... Door 1b ... Door sash 2 ... Door glass run 2E ... Corner type molding part 3 ... Door glass 4 ... Door weather strip 5 ... Bottom wall part 4C ... Corner type molding part 13 ... High foaming soft sealing material 14 ... Solid material 15 ... Mold 18 ... Mounting base 30 ... Body side weather strip 30C ... Corner mold forming part 33 ... Seal lip 41 ... Hood side weather strip 43 ... Cover plate 45 ... Seal rubber (seal lip)
R ... Product shape space

Claims (8)

A weather strip structure formed by injecting a resin material or a rubber-based material into a mold,
A string-like high foaming soft sealing material is embedded in a portion in pressure contact with the mating member by insert molding together with a solid material interposed between the high foaming soft sealing material and the base material of the weather strip. Weather strip to do. The weather strip is a door glass run that is mounted inside the door sash and receives the door glass, and has a substantially U-shaped cross section.
The string-like high-foaming soft sealing material is embedded together with the solid material by insert molding in the mounting base portion of the corner mold forming portion that connects the general portions of the door glass run. Weather strip. The weather strip is a door weather strip that is mounted around the vehicle door and elastically contacts the door opening edge of the vehicle body when the door is closed,
2. A string-like high foam soft seal material is embedded together with a solid material by insert molding in an attachment base portion of a corner mold forming portion that connects the general portions of the door weather strip. Weather strip. The weather strip is a body side weather strip that is attached to the door opening edge on the vehicle body side and elastically contacts the door when the door is closed,
2. A string-like high-foaming soft sealing material is embedded together with a solid material by insert molding in a seal lip of a corner-shaped molding portion that connects the general portions of body-side weather strips. Weather strip as described. A method for producing a weather strip according to any one of claims 2 to 4,
A high foam soft seal material and a solid material are integrally molded in advance,
After positioning these high foam soft seal materials and solid materials as inserts in the product shape part space of the mold, the material to be the corner mold part is injected into the product shape part space to form the corner mold part. A method for producing a weather strip, comprising molding. The weather strip is a hood side weather strip that is disposed on the inner side of the front fender on the engine room side and seals the inside and outside of the engine room by elastic contact of the hood side when the hood is closed,
2. The weather strip according to claim 1, wherein a string-like highly foamed soft sealing material is embedded together with a solid material by insert molding in a lower part of a cover plate having a hollow sealing lip at the upper part.   The weather strip according to claim 6, wherein the seal lip is detachably attached to an upper portion of the mounting plate. A method for producing a weatherstrip according to claim 7,
A high foam soft seal material and a solid material are integrally molded in advance,
After positioning these high foam soft seal materials and solid materials in the product shape part space of the mold as inserts, the material to be the cover plate is injected into the product shape part space to form the cover plate. A method for producing a weather strip.

Images