Weather-strip for automobile

Abstract

To prevent an edge part of a core-pulling slit from being broken when pulling the core after forming.SOLUTION: A weather-strip for an automobile comprises an extrusion-forming part and a die-forming part 1F. The die forming part 1F has a die-forming mounting base part that is mounted on an outer periphery part of a door, and a die forming hollow seal part, formed integrally with the die forming mounting base part, which elastically contacts a peripheral edge part of a vehicle body opening part. The die forming mounting base part has a tabular die forming bottom side part 30a. In the die forming bottom side part 30a is formed a core-pulling slit 34 for pulling a core so as to extend in a longitudinal direction. A length L of the core-pulling slit 34 is set to be shorter than a length in a same direction of the core. A thick part 35 which is thicker than other parts in the die forming bottom side part 30a is formed in a portion arranged adjacent to an edge part 34b of the core-pulling slit 34 in the die forming bottom side part 30a.SELECTED DRAWING: Figure 11

Description

[Technical field]

[0001] The present disclosure relates to automotive weather strips that are attached to the doors of automobiles. [Background technology]

[0002] A weather strip is attached to the outer periphery of an automobile door, and the weather strip seals the gap between the periphery of the vehicle body opening and the outer periphery of the door. The weather strip in Patent Document 1 is constructed by connecting an extrusion molding part and a molded part. The molded part has a hollow seal part and an attachment base part that is attached to the outer periphery of the door, and a clip attachment hole is formed in the bottom part of the attachment base to attach a clip that engages with the outer periphery of the door, and a core removal slit is formed to remove the core that forms the inner surface of the hollow seal part after molding, and further a vent hole is formed to prevent the hollow seal part from sticking when the core is removed.

[0003] In addition, the weather strip of Patent Document 2 is also constructed by connecting an extrusion molded portion and a molded portion, and a clip mounting hole is formed in the bottom portion of the mounting base of the molded portion, and a core removal slit is also formed that is bent in the vehicle width direction to bypass the clip mounting hole.

[0004] The weather strip of Patent Document 3 is also configured by connecting an extrusion molded part and a molded part. Patent Document 3 discloses a configuration in which a core removal slit is formed on the side surface (back surface) of the mounting base of the molded part. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2016-165960 A [Patent Document 2] JP 2001-114036 A [Patent Document 3] Japanese Patent Application Publication No. 4-151330 Summary of the Invention [Problem to be solved by the invention]

[0006] Incidentally, the longitudinal position of the clip mounting hole formed in the mounting base of the molded part is determined by the constraints of the mounting position on the door, so that the core removal slit, clip mounting hole, and vent hole are formed in order, as in the molded part of Patent Document 1. Meanwhile, the core is formed so as to reach the hollow seal part of the extrusion molded part from the hollow seal part of the molded part, and is inserted into the hollow seal part of the extrusion molded part during molding of the molded part so that the material of the molded part does not flow into the hollow seal part of the extrusion molded part. In other words, since the length of the core is longer than the length of the core removal slit, when attempting to remove the core from the molded part, it was necessary to pull and stretch the molded part in the longitudinal direction and forcibly remove it.

[0007] When the molded part is pulled in the longitudinal direction, the edge of the core removal slit is stretched by being strongly elastically brought into contact with the end of the core, which may cause the edge of the core removal slit to tear. If the edge of the core removal slit is torn, the product becomes defective and needs to be repaired with adhesive, or if the tear is severe, it must be discarded.

[0008] In response to this, for example, as in Patent Document 2, if the core removal slit is formed bent in the vehicle width direction to go around the clip mounting hole, the length of the core removal slit can be increased, so it is considered that the edge of the core removal slit is less likely to tear when removing the core. However, in order to bend the core removal slit in the vehicle width direction, it becomes necessary to increase the dimension in the vehicle width direction of the bottom side of the mounting base, and depending on the vehicle, there are cases where such a dimension in the vehicle width direction cannot be secured.

[0009] Also, for example, as in Patent Document 3, if the core removal slit is formed on the side surface (back surface) of the mounting base of the molded part, the length of the core removal slit can be increased without considering the clip mounting hole, which is thought to make it difficult for the edge of the core removal slit to tear when removing the core. However, in order to form the core removal slit on the side surface of the mounting base, it becomes necessary to increase the dimension of the mounting base in the height direction, and depending on the vehicle, there are cases where such a dimension in the height direction cannot be secured.

[0010] The present disclosure has been made in consideration of such points, and an object of the present disclosure is to prevent the edge of the core removal slit from being torn when the core is removed after molding. [Means for solving the problem]

[0011] In order to achieve the above object, a first aspect of the present disclosure can be based on the premise of an automobile weather strip that is attached to the outer periphery of an automobile door and seals between the periphery of a vehicle body opening and the outer periphery of the door. The automobile weather strip includes an extrusion molded part that is extruded and a die molded part that is connected to the longitudinal end of the extrusion molded part. The extrusion molded part has an extrusion molded mounting base that is attached to the outer periphery of the door, and an extrusion molded hollow seal part that is integrally molded with the extrusion molded mounting base and elastically contacts the periphery of the vehicle body opening. The die molded part has a die molded mounting base that is attached to the outer periphery of the door, and a die molded hollow seal part that is integrally molded with the die molded mounting base and elastically contacts the periphery of the vehicle body opening. The die molded mounting base has a plate-shaped die molded bottom part that extends along the outer periphery of the door. A core removal slit is formed in the molded bottom portion so as to extend in the longitudinal direction for removing the core formed on the inner surface of the molded hollow seal portion, and the length of the core removal slit is set to be shorter than the length of the core in the same direction. A thick-walled portion is formed in a portion of the molded bottom portion adjacent to the edge of the core removal slit, which is thicker than other portions of the molded bottom portion.

[0012] That is, when molding the molded part integrally with the extrusion part previously extruded, for example, a die that opens and closes and a core are prepared. The die molds the outer surfaces of the molded attachment base and the molded hollow seal part, and the core molds the inner surface of the molded hollow seal part. After molding of the molded part, the core is removed from the core removal slit. At this time, since the length of the core removal slit is set shorter than the length of the core in the same direction, the molded part is pulled and stretched in the longitudinal direction. This causes the edge of the core removal slit to strongly elastically contact the end of the core and to be stretched, but in this configuration, a thick portion is formed in the part adjacent to the edge of the core removal slit, so that tearing of the edge of the core removal slit is suppressed.

[0013] The thick-walled portion according to the second aspect of the present disclosure may have an inclined surface portion formed so as to become thicker as it approaches the edge of the core removal slit, thereby making it difficult for the core to get caught on the thick-walled portion when being removed from the core removal slit.

[0014] The molded bottom part according to the third aspect of the present disclosure may have a clip attachment hole formed between the connection part with the extrusion molded part and the edge part of the core removal slit, to which a clip that engages with the outer periphery of the door is attached. This allows the molded attachment base to be fixed at a desired location to the outer periphery of the door. By forming the clip attachment hole in the molded bottom part, the length of the core removal slit must be shortened, and as a result, when the core is removed from the core removal slit, the edge part of the core removal slit is stretched by elastically contacting the end part of the core more strongly. Even in such a case, the thick part is formed, so that the edge part of the core removal slit is prevented from breaking.

[0015] The thick-walled portion according to the fourth aspect of the present disclosure may be formed so as to protrude on the side opposite to the side of the molded bottom portion that contacts the outer periphery of the door, thereby making it possible to flatten the side of the molded bottom portion that contacts the outer periphery of the door and form it into a shape that conforms to the outer periphery of the door, thereby improving the sealing performance.

[0016] The thick-walled portion according to the fifth aspect of the present disclosure may be a ridge extending continuously in the vehicle interior / exterior direction, thereby further enhancing the reinforcing effect of the edge of the core removal slit. Effect of the Invention

[0017] As described above, a thick-walled portion is formed in the portion adjacent to the edge of the core removal slit in the bottom portion of the molded part, so that the edge of the core removal slit can be prevented from tearing when the core is removed after molding. [Brief description of the drawings]

[0018] [Figure 1] 1 is a left side view of an automobile equipped with an automobile weather strip according to an embodiment of the present invention. [Diagram 2] FIG. 4 is a side view of the left front door weather strip as viewed from outside the vehicle compartment. [Diagram 3] 4 is an enlarged perspective view showing a portion of a front door weather strip extending from a front vertical side extrusion portion to a front mold portion and a front upper side extrusion portion. FIG. [Figure 4] FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. [Diagram 5] 4 is a cross-sectional view taken along line VV in FIG. [Figure 6] FIG. 4 is a perspective view of the front mold molding part as seen from the front. [Figure 7] FIG. 4 is a perspective view of the front mold forming portion as viewed obliquely from below and rear. [Figure 8] FIG. 4 is a rear view of the lower portion of the front mold part. [Figure 9] IX-IX line cross-sectional view in FIG. [Figure 10] 4 is a cross-sectional view taken along line XX in FIG. [Figure 11] 10 is a cross-sectional view taken along line XI-XI in FIG. 8. [Figure 12] FIG. 13 is a diagram showing the state immediately after molding of the front mold part. [Figure 13] 13 is a view equivalent to FIG. 12, illustrating a state in which an upper portion of the front mold part is pulled. FIG. [Figure 14] 12 and shows the state in which the core has been removed from the upper part of the front mold part. FIG. [Figure 15] 12 and illustrates a state in which the core has been removed from the middle part of the front mold part. FIG. [Figure 16] 12 and shows a state in which the core has been completely removed from the front mold portion. FIG. [Figure 17] 1 is a cross-sectional view taken along line XVII-XVII in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Hereinafter, the embodiments of the present invention will be described in detail with reference to the drawings. Note that the following description of the preferred embodiments is merely illustrative in nature and is not intended to limit the present invention, its applications, or its uses.

[0020] FIG. 1 is a left side view of an automobile 100 equipped with an automobile weather strip 1 (shown in FIG. 2) according to an embodiment of the present invention. A front door 110 and a rear door 210 are attached to the left and right sides of the automobile 100 so as to be able to open and close. The front door 110 has a door main body 111, a windshield 112, and a window frame 113 that functions as a sash that holds the windshield 112. The door main body 111 of the front door 110 is attached to a front pillar (not shown) of the vehicle body via a hinge (not shown) that is configured to be rotatable around a rotation axis that extends in the vertical direction. Similarly to the front door 110, the rear door 210 also has a door main body 211, a rear glass 212, and a window frame 213 that functions as a sash that holds the rear glass 212, and the door main body 211 is attached to a center pillar (not shown) via a hinge (not shown) that is configured to be rotatable around a rotation axis that extends in the vertical direction.

[0021] In the description of this embodiment, the front side of the vehicle is simply referred to as the front, the rear side of the vehicle is simply referred to as the rear, the outside in the vehicle width direction is referred to as the outside of the vehicle compartment, and the inside in the vehicle width direction is referred to as the inside of the vehicle compartment.

[0022] The window frame 113 of the front door 110 has a frame front vertical side portion 113a extending upward and rearward from the upper front end portion of the door main body portion 111, a frame upper side portion 113b extending rearward from the upper end portion of the frame front vertical side portion 113a, and a frame rear vertical side portion 113c extending downward from the rear end portion (longitudinal end portion) of the frame upper side portion 113b to the upper rear end portion of the door main body portion 111.

[0023] The window frame 213 of the rear door 210 has a frame front vertical side portion 213a extending upward from the upper front end portion of the door main body portion 211, a frame upper side portion 213b extending rearward from the upper end portion of the frame front vertical side portion 213a, and a frame rear vertical side portion 213c extending downward and rearward from the rear end portion (longitudinal end portion) of the frame upper side portion 213b to the upper rear end portion of the door main body portion 211.

[0024] (Overall structure of front door weather strip 1) 2 shows a front door weather strip (weather strip for automobiles) 1. The front door weather strip 1 is formed in an annular shape to correspond to the outer shape of the front door 110, and is attached to the outer periphery of the front door 110, and is a member for sealing between the peripheral edge of the vehicle body opening 103 (shown in FIG. 1) and the outer periphery of the front door 110.

[0025] The front door weather strip 1 includes a front upper edge extrusion molding portion 1A, a rear upper edge extrusion molding portion 1B, a rear vertical edge extrusion molding portion 1C, a bottom edge extrusion molding portion 1D, and a front vertical edge extrusion molding portion 1E. Details of the molding method will be described later, but the front upper edge extrusion molding portion 1A, the rear upper edge extrusion molding portion 1B, the rear vertical edge extrusion molding portion 1C, the bottom edge extrusion molding portion 1D, and the front vertical edge extrusion molding portion 1E are portions molded by an extrusion molding method in which an elastic material is extruded from a die (not shown) and molded to have the same cross section in the longitudinal direction.

[0026] Furthermore, the front door weather strip 1 has a front mold molding portion 1F provided between the front end of the front upper edge extrusion molding portion 1A and the upper end of the front vertical edge extrusion molding portion 1E, an intermediate mold molding portion 1G provided between the rear end of the front upper edge extrusion molding portion 1A and the front end of the rear upper edge extrusion molding portion 1B, and a rear mold molding portion 1H provided between the rear end of the rear upper edge extrusion molding portion 1B and the upper end of the rear vertical edge extrusion molding portion 1C.

[0027] The boundary between the front vertical side extrusion molding portion 1E and the front side mold molding portion 1F is indicated by the symbol L1, and the boundary between the front upper side extrusion molding portion 1A and the front side mold molding portion 1F is indicated by the symbol L2. The front side mold molding portion 1F is connected to the upper end (longitudinal end) of the front vertical side extrusion molding portion 1E and the front end (longitudinal end) of the front upper side extrusion molding portion 1A. The boundary between the rear vertical side extrusion molding portion 1C and the rear side mold molding portion 1H is indicated by the symbol L3, and the boundary between the rear upper side extrusion molding portion 1B and the rear side mold molding portion 1H is indicated by the symbol L4. The rear side mold molding portion 1H is connected to the rear end (longitudinal end) of the rear upper side extrusion molding portion 1B and the upper end (longitudinal end) of the rear vertical side extrusion molding portion 1C. The boundary between the front top extrusion molding portion 1A and the intermediate mold molding portion 1G is indicated by the symbol L5, and the boundary between the rear top extrusion molding portion 1B and the intermediate mold molding portion 1G is indicated by the symbol L6. The intermediate mold molding portion 1G is connected to the rear end portion (longitudinal end portion) of the front top extrusion molding portion 1A and the front end portion (longitudinal end portion) of the rear top extrusion molding portion 1B.

[0028] The front mold part 1F, the intermediate mold part 1G, and the rear mold part 1H are parts molded by a die (described later) that can be opened and closed. The front mold part 1F is molded integrally with the front end of the front upper edge extrusion part 1A and the upper end of the front vertical edge extrusion part 1E by injecting an elastic material into the cavity while the front end of the front upper edge extrusion part 1A and the upper end of the front vertical edge extrusion part 1E are held by the die. The intermediate mold part 1G is molded integrally with the front upper edge extrusion part 1A and the rear upper edge extrusion part 1B by injecting an elastic material into the cavity while the rear end of the front upper edge extrusion part 1A and the front end of the rear upper edge extrusion part 1B are held by the die. The rear molded portion 1H is molded integrally with the rear upper edge extrusion molding portion 1B and the rear vertical edge extrusion molding portion 1C by injecting an elastic material into the cavity while the rear end of the rear upper edge extrusion molding portion 1B and the upper end of the rear vertical edge extrusion molding portion 1C are held by a mold. For example, the rear upper edge extrusion molding portion 1B and the rear molded portion 1H are provided across the frame upper edge portion 113b of the window frame 113 and the frame rear vertical edge portion 113c extending downward from the rear end thereof.

[0029] Further, the front upper edge extrusion portion 1A, the front molded portion 1F and the front vertical edge extrusion portion 1E are provided across the frame upper edge portion 113a of the window frame 113 and the front portion of the door main body portion 111.

[0030] In addition, the applicable material for the front door weather strip 1 is not particularly limited as long as it is a rubber-like elastic body, but in the case of rubber, EPDM sponge rubber is preferable, and in the case of thermoplastic resin, foamed TPO or soft TPO is preferable.

[0031] Below, we will explain the case where the present invention is applied to the portion of the front door weather strip 1 that extends from the front vertical side extrusion molding portion 1E to the front mold molding portion 1F and the front upper side extrusion molding portion 1A. However, the present invention is not only applicable to this portion, but can also be applied to other portions of the front door weather strip 1, or to a rear door weather strip (not shown) provided on the rear door 210.

[0032] 3 is an enlarged perspective view showing a portion of the front vertical side extrusion molding portion 1E of the front door weather strip 1 extending from the front side molded portion 1F to the front upper side extrusion molding portion 1A. As shown in FIG. 4, the front upper side extrusion molding portion 1A has an upper side extrusion molding attachment base 10 attached to the outer periphery of the front door 110, an upper side extrusion molding hollow seal portion 11 integrally molded with the upper side extrusion molding attachment base 10 and elastically contacting the periphery of the vehicle body opening 103, a first upper side lip portion 12a, and a second upper side lip portion 12b. The upper side extrusion molding attachment base 10 has a plate-shaped upper side extrusion molding bottom portion 10a extending along the outer periphery of the front door 110. Although not shown, the front upper edge extrusion molding portion 1A is adapted to be attached to the outer periphery of the frame upper edge portion 113b of the window frame 113 of the front door 110 by a resin clip, and a clip that engages with the outer periphery of the frame upper edge portion 113b of the window frame 113 of the front door 110 is adapted to be attached to the upper edge extrusion molding bottom portion 10a.

[0033] Although not shown here, instead of attaching with a clip, a hold shape may be provided on the window frame 113 and the upper extrusion molded bottom portion 10a may be fitted into the hold shape for attachment.

[0034] Moreover, the upper side extrusion molding mounting base 10 is formed hollow and has an upper side cavity 13. The upper side extrusion molding hollow seal portion 11 is a portion that elastically contacts the peripheral portion of the vehicle body opening 103 when the front door 110 is closed. The first upper side lip portion 12a is also a portion that elastically contacts the peripheral portion of the vehicle body opening 103 when the front door 110 is closed. Furthermore, the second upper side lip portion 12b is a portion that elastically contacts the outer periphery of the frame upper side portion 113b of the window frame 113 of the front door 110.

[0035] 5, the front vertical side extrusion molding part 1E has a vertical side extrusion molding attachment base 20 attached to the outer periphery of the front door 110, a vertical side extrusion molding hollow seal part 21 that is integrally formed with the vertical side extrusion molding attachment base 20 and elastically contacts the periphery of the vehicle body opening 103, and a vertical side lip part 22a. The vertical side lip part 22a is a part that elastically contacts the door body part 111 of the front door 110.

[0036] The vertical side extrusion molding mounting base 20 has a plate-shaped vertical side extrusion molding bottom portion 20a extending along the outer periphery of the front door 110. Although not shown, the front vertical side extrusion molding portion 1E is attached to the outer periphery of the door body portion 111 of the front door 110 by a resin clip, and a clip that engages with the outer periphery of the door body portion 111 of the front door 110 is attached to the vertical side extrusion molding bottom portion 20a. In addition, the vertical side extrusion molding mounting base 20 is formed in a hollow shape and has a vertical side cavity portion 23. The vertical side extrusion molding hollow seal portion 21 is a portion that elastically contacts the peripheral portion of the vehicle body opening 103 when the front door 110 is closed. In addition, the vertical side lip portion 22a is a portion that elastically contacts the outer periphery of the door body portion 111 of the front door 110.

[0037] As shown in Figures 3, 6 and 7, the front mold molding part 1F has a bent part 30A in the vertical middle part. That is, the part of the front mold molding part 1F below the bent part 30A extends in the vertical direction, while the part of the front mold molding part 1F above the bent part 30A is inclined so as to be positioned further back as it goes upward. The bent part 30A is provided above the vertical center of the front mold molding part 1F, so that the part below the bent part 30A of the front mold molding part 1F is longer than the part above the bent part 30A of the front mold molding part 1F. The bent part 30A may be omitted, and instead a curved part (not shown) may be provided, or the front mold molding part 1F may be linear.

[0038] 3, 8 to 10, and 17, the front molded portion 1F has a molded attachment base 30 attached to the outer periphery of the front door 110, a molded hollow seal portion 31 that is molded integrally with the molded attachment base 30 and elastically contacts the periphery of the vehicle body opening 103, a first molded lip portion 32, and a second molded lip portion 33. The molded attachment base 30, the molded hollow seal portion 31, the first molded lip portion 32, and the second molded lip portion 33 are bent at the portion where the bent portion 30A is formed.

[0039] The molded mounting base 30 has a plate-shaped molded bottom portion 30a extending along the outer periphery of the front door 110. The upper end of the molded bottom portion 30a is connected to the front end of the upper side extrusion bottom portion 10a of the front upper side extrusion portion 1A. The lower end of the molded bottom portion 30a is connected to the upper end of the vertical side extrusion bottom portion 20a of the front vertical side extrusion portion 1E.

[0040] The molded hollow seal portion 31 is a portion that elastically contacts the peripheral portion of the vehicle body opening 103 when the front door 110 is closed. The upper end of the molded hollow seal portion 31 is connected to the front end of the upper edge extrusion molded hollow seal portion 11 of the front upper edge extrusion molded portion 1A. The lower end of the molded hollow seal portion 31 is connected to the upper end of the vertical edge extrusion molded hollow seal portion 21 of the front vertical edge extrusion molded portion 1E. Therefore, the internal space of the molded hollow seal portion 31 is in communication with the internal space of the upper edge extrusion molded hollow seal portion 11 and the internal space of the vertical edge extrusion molded hollow seal portion 21.

[0041] The first molded lip portion 32 and the second molded lip portion 33 are portions that elastically contact the outer periphery of the front door 110. The upper end portion of the first molded lip portion 32 is continuous with the front end portion of the first upper edge lip portion 12a of the front upper edge extrusion molding portion 1A. The lower end portion of the first molded lip portion 32 is located in the vertical middle portion of the front molded portion 1F (shown in FIG. 6). The second molded lip portion 33 is formed smaller than the first molded lip portion 32.

[0042] As shown in Figs. 7 to 9, the molded bottom portion 30a is formed with a core removal slit 34 extending in the longitudinal direction of the front molded portion 1F for removing a core 300 (described later) formed on the inner surface of the molded hollow seal portion 31. Since the molded bottom portion 30a extends in the vertical direction, the core removal slit 34 formed in the molded bottom portion 30a also extends in the vertical direction. As shown in Fig. 7, the upper edge portion 34a of the core removal slit 34 is located near the upper end portion of the front molded portion 1F. Meanwhile, the lower edge portion 34b of the core removal slit 34 is spaced upward from the lower end portion of the front molded portion 1F.

[0043] As shown in Figs. 7, 8 and 11, a thick portion 35 that is thicker than other portions of the molded bottom portion 30a is formed in a portion adjacent to the lower side of the lower edge portion 34b of the core removal slit 34 in the molded bottom portion 30a. The thick portion 35 is formed by a recess 304 of the core 300 described later. The thick portion 35 is a reinforcing portion that reinforces the lower edge portion 34b of the core removal slit 34, and is formed so as to protrude on the opposite side (inward) of the side of the molded bottom portion 30a that contacts the outer periphery of the front door 110. That is, the surface located on the outside of the molded bottom portion 30a is the surface that contacts the outer periphery of the front door 110, while the surface located on the inside of the molded bottom portion 30a is the surface that does not contact the outer periphery of the front door 110. By forming a thick portion 35 on the surface located inside the molded bottom portion 30a, the side of the molded bottom portion 30a that contacts the outer periphery of the front door 110 can be flattened and shaped to fit the outer periphery of the front door 110, thereby improving sealing performance.

[0044] The thick-walled portion 35 forms a ridge extending continuously in the vehicle interior / exterior direction. The thick-walled portion 35 has an inclined surface portion 35a formed so that the thickness increases as it approaches the lower edge portion 34b of the core removal slit 34. Meanwhile, the surface 35b of the thick-walled portion 35 located on the core removal slit 34 side extends in the thickness direction of the molded bottom portion 30a. This further enhances the reinforcing effect of the thick-walled portion 35 on the lower edge portion 34b of the core removal slit 34. The thick-walled portion 35 may be a ridge extending along the lower edge portion 34b of the core removal slit 34.

[0045] The thickness of the thick-walled portion 35 is set in the range of 1.3 to 2.0 times the thickness of the other portions of the molded bottom portion 30a. If it is less than 1.3 times, the rigidity is insufficient, and the upper edge portion 34a and the lower edge portion 34b are likely to break when the core 300 is removed from the core removal slit 34. If it exceeds 2.0 times, the thick-walled portion 35 is likely to get caught when the core 300 is removed from the core removal slit 34.

[0046] The angle α between the inclined surface 35a of the thick-walled portion 35 and the surface located inside the molded bottom portion 30a is set in the range of 15 degrees to 60 degrees. If it is less than 15 degrees, the gradually changing thickness section of the thick-walled portion 35 becomes unnecessarily long, which is not preferable. If it exceeds 60 degrees, the core 300 is likely to get caught on the thick-walled portion 35 when it is removed from the core removal slit 34.

[0047] As shown in Figure 12, the core 300 has a molding portion 301 that molds the inner surface of the molded hollow seal portion 31 of the front mold molding portion 1F, a first insertion portion 302 that protrudes from the molding portion 301 and is inserted into the upper edge extrusion molded hollow seal portion 11 and upper edge cavity portion 13 of the front upper edge extrusion molding portion 1A, and a second insertion portion 303 that protrudes from the molding portion 301 and is inserted into the vertical edge extrusion molded hollow seal portion 21 and vertical edge cavity portion 23 of the front vertical edge extrusion molding portion 1E.

[0048] Further, a center core support plate 300a is provided which protrudes from the molding portion 301 and supports the molding portion 301 itself within the mold cavity. Furthermore, the portion of the mold bottom portion 30a where the center core support plate 300a exists forms the shape of the center core removal slit 34 shown in Figures 7, 9, and 17.

[0049] 12, the length L of the core removal slit 34 is set to be shorter than the length in the same direction of the core 300. The length of the core 300 is the combined length of the molding portion 301, the first insertion portion 302, and the second insertion portion 303.

[0050] 10, the molded bottom side portion 30a has a clip attachment hole 36 for attaching a clip C that engages with the outer periphery of the door body 111 of the front door 110 between the connection portion with the front vertical side extrusion molded portion 1E (portion indicated by boundary line L1) and the lower edge portion 34b of the core removal slit 34. The clip attachment hole 36 is formed by a protrusion portion 401 of a slide mold 400 described later.

[0051] Specifically, an insertion hole (not shown) into which the tip of the clip C is inserted is formed on the outer periphery of the door body 111 of the front door 110. By inserting the tip of the clip C into the insertion hole, it engages with the periphery of the insertion hole and does not come off, and the molded bottom portion 30a can be fixed to the outer periphery of the front door 110. As shown in Fig. 8, the clip attachment hole 36 is circular, but the shape is not particularly limited as long as it can hold the clip C so as not to come off.

[0052] Also, the molded bottom portion 30a may have an air vent (not shown) between the connection portion with the front vertical side extrusion portion 1E and the clip attachment hole 36. That is, the molded bottom portion 30a may have an air vent (not shown) in addition to the core removal slit 34 and the clip attachment hole 36, in that order from the top. The air vent is for preventing the core 300 from sticking to the inner surface of the molded hollow seal portion 31 by letting in air from the outside when removing the core 300 from the molded hollow seal portion 31. The shape of the air vent is not particularly limited, but may be a shape that is long in the vertical direction.

[0053] (Molding procedure for front mold part) Next, a molding method of the front molded part 1F will be described. After preparing the front vertical side extrusion molding part 1E and the front upper side extrusion molding part 1A, the front vertical side extrusion molding part 1E and the front upper side extrusion molding part 1A are held in a mold (not shown) for molding the front molded part 1F. This mold is provided with a core 300 as shown in FIG. 12, etc., and the first insertion part 302 of the core 300 is inserted into the upper side extrusion molding hollow seal part 11 and the upper side cavity part 13 of the front upper side extrusion molding part 1A, and the second insertion part 303 is inserted into the vertical side extrusion molding hollow seal part 21 and the vertical side cavity part 23 of the front vertical side extrusion molding part 1E.

[0054] Here, a recess 304 is formed on the second insertion portion 303 side of the connection portion of the core 300 between the core support plate 300a and the molding portion 301. A slide die 400 is disposed in a portion of the core 300 adjacent to the vertical side extrusion molded hollow seal portion 21 side. The slide die 400 is provided with a cylindrical protrusion 401, and the protrusion 401 is disposed so as to contact the molding portion 301 of the core 300 when the mold is fully closed.

[0055] Thereafter, when the material for the front molded portion 1F is filled into the mold, the material is molded by the mold and the core 300. As a result, as shown in Fig. 12, the front molded portion 1F that is continuous with the front vertical side extrusion molded portion 1E and the front upper side extrusion molded portion 1A is obtained, and at the same time, the recessed portion 304 forms the thick portion 35 shown in Fig. 11, and the protruding portion 401 forms the clip attachment hole 36 shown in Fig. 10, etc.

[0056] Next, the upper die (not shown) of the mold is opened, the slide die 400 is moved backward, and then the core 300 is removed. First, as shown in Fig. 13, the front mold molding part 1F is pulled toward the front upper edge extrusion molding part 1A (in the direction of the arrow) to stretch it overall. At this time, the lower edge part 34b of the core removal slit 34 is stretched by being strongly elastically brought into contact with the end part of the core support plate 300a, but since the thick part 35 is formed in the part adjacent to the lower edge part 34b of the core removal slit 34 and the lower edge part 34b is reinforced, the breakage of the lower edge part 34b of the core removal slit 34 is suppressed.

[0057] Next, with the front molded portion 1F extended, the first insertion portion 302 is removed from the upper edge extrusion molded hollow seal portion 11 and the upper edge cavity portion 13 of the front upper edge extrusion molded portion 1A as shown in Figure 14, and is also removed from the upper edge 34a of the core removal slit 34 (in the direction of the arrow).

[0058] Next, after removing the first insertion portion 302, as shown in Fig. 15, the bent portion 30A of the front molded portion 1F is bent to the opposite side to make it straight (arrow direction) and moved toward the front vertical side extrusion molding portion 1E (arrow direction) to remove the second insertion portion 303 from the vertical side extrusion molding hollow seal portion 21 and the vertical side cavity portion 23 of the front vertical side extrusion molding portion 1E, and also from the lower edge portion 34b of the core removal slit 34. Finally, as shown in Fig. 16, the core 300 can be completely removed from the core removal slit 34 (arrow direction).

[0059] (Effects of the embodiment) As described above, in this embodiment, the clip mounting hole 36 and the core removal slit 34 are formed in the molded bottom portion 30a so as to be aligned in the vertical direction, and the core removal slit 34 is not bent in the vehicle width direction so as to bypass the clip mounting hole 36, so that it is possible to shorten the dimension of the molded bottom portion 30a in the vehicle width direction. Also, since the core removal slit 34 is formed in the molded bottom portion 30a and not on the side surface (back surface) of the molded mounting base 30, it is possible to shorten the dimension of the molded mounting base 30 in the height direction.

[0060] If the clip mounting hole 36 and the core removal slit 34 are formed so as to be aligned in the vertical direction, the length of the core removal slit 34 will be shortened. However, in this embodiment, by providing a thick-walled portion 35 adjacent to the lower edge 34b of the core removal slit 34, it is possible to prevent the lower edge 34b of the core removal slit 34 from being torn when the core 300 is removed from the core removal slit 34 after the front mold molding portion 1F is molded.

[0061] The above-mentioned embodiment is merely illustrative in every respect and should not be interpreted as being restrictive. Furthermore, all modifications and changes within the scope of the claims are within the scope of the present invention. The present invention can also be applied to the intermediate mold forming part 1G and the rear mold forming part 1H. Furthermore, as shown in FIG. 7, when the upper edge 34a of the core removal slit 34 is close to the connection part L2, the thick part 35 is not provided in the part adjacent to the upper edge 34a, but when the lower edge 34b is far away from the connection part L1, the thick part 35 may be provided in the part adjacent to the upper edge 34a of the core removal slit 34 (not shown). [Industrial Applicability]

[0062] As described above, the present invention can be applied to, for example, an automobile weather strip attached to a door disposed on the side of an automobile. [Explanation of symbols]

[0063] 1. Weather strip for front door (weather strip for car door) 1A Front upper edge extrusion molding part 1B Rear upper edge extrusion molding part 1C Rear vertical side extrusion molding part 1D Bottom Extrusion 1F Front mold forming section 1E Front vertical side extrusion molding part 1G Intermediate molding section 1H Rear mold molding part 10 Top extrusion molding mounting base 10a: Upper extrusion molding bottom part 11 Upper extrusion molding hollow seal part 12a First upper lip 12b Second upper lip 13 Upper cavity 20 Vertical side extrusion molding mounting base 20a Vertical side extrusion molding bottom part 21 Vertical side extrusion molding hollow seal part 22 Vertical lip 23 Vertical hollow section 30 Molded mounting base 30A bent part 31 Molded hollow seal part 30a molded bottom part 34 Core removal slit 34a Upper edge 34b Lower edge α angle C-Clip 35 Thick part 35a Slope section 35b Surface located on the core removal slit side 36 Clip mounting hole 100 Automobiles 103 Body opening 110 Front Door 111 Door body 112 Windshield 113 Wind Frame 113a Frame front vertical side 113b Top of frame 113c Rear vertical side of frame 210 Rear door 211 Door body 212 Rear window 213 Wind Frame 213a Frame front vertical side 213b Top of frame 213c Rear vertical side of frame 300 core 300a Core support plate 301 Molding section 302 First Insertion Part 303 Second Insertion Part 304 Recess 400 Slide type 401 Protrusion L Length L1~L6 Boundary line (connection part)

Claims

1. A weather strip (1) for an automobile (100) is attached to the outer periphery of a door (110, 210) of the automobile (100) and seals between the peripheral edge of a vehicle body opening (103) and the outer periphery of the door (110, 210), An extrusion molded portion (1A / 1E) that has been extruded, a die-molded portion (1F) connected to the longitudinal end of the extrusion molding portion (1A / 1E) and molded by molding; The extrusion molding portion (1A / 1E) is an extrusion molding mounting base (10, 20) attached to an outer periphery of the door (110, 210); and an extrusion molding hollow seal portion (11, 21) integrally formed with the extrusion molding mounting base (10, 20) and elastically contacting a peripheral portion of the vehicle body opening (103), The molded portion (1F) is a molded mounting base (30) attached to an outer periphery of the door (110, 210); and a molded hollow seal part (31) integrally formed with the molded mounting base (30) and elastically contacting a peripheral edge of the vehicle body opening (103), The molded mounting base (30) has a plate-shaped molded bottom portion (30a) extending along the outer periphery of the door (110, 210), A core removal slit (34) for removing a core (300) formed on the inner surface of the molded hollow seal portion (31) is formed in the molded bottom portion (30a) so as to extend in the longitudinal direction. The length (L) of the core removal slit (34) is set shorter than the length of the core (300) in the same direction, A weather strip (1) for an automobile, characterized in that a thick-walled portion (35) that is thicker than other portions of the molded bottom portion (30a) is formed in a portion of the molded bottom portion (30a) adjacent to the edge portions (34a, 34b) of the core removal slit (34).

2. The weather strip for an automobile according to claim 1, The thick-walled portion (35) has an inclined surface portion (35a) formed so as to become thicker as it approaches the edge portions (34a, 34b) of the core removal slit (34).

3. The weather strip for an automobile according to claim 1, A weather strip for an automobile (1), characterized in that a clip attachment hole (36) for attaching a clip (C) that engages with the outer periphery of the door (110, 210) is formed in the molded bottom portion (30a) between a connection portion (L1, L2) with the extrusion molded portion (1A, 1E) and an edge portion (34a, 34b) of the core removal slit (34).

4. The weather strip for an automobile according to claim 1, The thick portion (35) is formed so as to protrude on the side opposite to the side of the molded bottom portion (30a) that contacts the outer periphery of the door (110, 210).

5. In the weather strip (1) for an automobile according to claim 4, The weather strip (1) for an automobile is characterized in that the thick portion (35) forms a protrusion that extends continuously in the interior and exterior directions of the vehicle cabin.

Images