Door weatherstrip

Abstract

To provide a door weather strip in which proper amount of adhesive agent can be supplied to a proper position of a core punched slit.SOLUTION: A door weather strip comprises: a fitting base part 11 which is attached to a peripheral edge part of a vehicle door 2; a hollow seal part 12 which seals the inside and outside of a cabin; and a core punched slit 15 which is arranged at the fitting base part 11 of an injection molding part 10 where a first opposing face 15l and a second opposing face 15r are bonded at a part of the slit 15. The first opposing face 15l is a protrusion shape and the second opposing face 15r is a recessed shape which can receive the protrusion shape. After making the first opposing face 15l contact with the second opposing face 15r to form an adhesive supply passage w inside thereof, proper amount of adhesive agent G is supplied from an adhesive supply hole 16 communicated thereto to the adhesive supply passage.SELECTED DRAWING: Figure 7

Description

Technical Field

[0001] The present invention is formed by connecting an extrusion molding part and an injection molding part, and includes a mounting base attached to the peripheral edge of a vehicle door, and a hollow sealing part that is pressed against the vehicle body when the vehicle door is closed to seal the inside and outside of the vehicle compartment. The mounting base of the injection molding part has a slit for extracting a core for forming the hollow sealing part during injection molding, and in at least a part of the longitudinal direction of the slit, a first opposing surface and a second opposing surface facing each other across the slit are joined by adhesion. The present invention relates to a door weatherstrip.

Background Art

[0002] As this type of door weatherstrip, for example, there is a door weatherstrip described in Patent Document 1 below. In Patent Document 1, a slit (core extraction slit 27) having a bypass portion 28 that bypasses a clip insertion hole 21 is formed in a mounting base (base portion 16) of an injection molding part (mold molding part 14). The opening width of the bypass portion 28 is equal to the opening width of the width narrowing portion 32 of the straight portion 29, and the entire bypass portion 28 is adhered. The opposing surfaces sandwiching the bypass portion 28 are vertical walls, and when adhering, for example, an adhesive is applied to the opposing surfaces, and the two opposing surfaces are abutted against each other.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In Patent Document 1, since the adhesive is applied along the opposing surfaces, it is difficult to supply the adhesive without displacement to the adhesive supply area. That is, there is a risk that the adhesive may protrude to the peripheral portion deviated from the opposing surfaces, resulting in a poor appearance, or that the adhesive may not be sufficiently supplied to the opposing surfaces, causing partial adhesion failure.

[0005] Therefore, the present invention aims to solve the above problems and to provide a door weatherstrip that can supply an appropriate amount of adhesive to a slit for removing a core at an appropriate position, and a method for manufacturing the same. [Means for solving the problem]

[0006] To achieve this, the present invention employs the following means. (1) A door weatherstrip comprising an extruded section and an injection-molded section connected together, a mounting base attached to the periphery of a vehicle door, and a hollow sealing section that is pressed against the vehicle body when the vehicle door is closed to seal the inside and outside of the vehicle, wherein the mounting base of the injection-molded section has a slit for removing the core for molding the hollow sealing section during injection molding, and at least a portion of the longitudinal direction of the slit, a first opposing surface and a second opposing surface facing each other across the slit are joined by adhesive, A door weatherstrip having an adhesive supply hole formed in the mounting base of the injection-molded portion, which communicates with the adhesive supply area between the first opposing surface and the second opposing surface. (2) The door weatherstrip according to (1), wherein the adhesive supply hole is formed by recessing a part of either one or both of the first opposing surface and the second opposing surface in the direction opposite to the slit. (3) In at least the adhesive supply area, one of the first opposing surface and the second opposing surface is formed in a convex shape, and the other is formed in a concave shape that can accept the convex shape of the other surface. The door weatherstrip according to (1) or (2), wherein when joined with an adhesive, the mounting surface side edges and sealing portion side edges of the first opposing surface and the second opposing surface come into contact, and in the intermediate portion, an adhesive flow path is formed along the slit with the first opposing surface and the second opposing surface separated. (4) The door weatherstrip according to (3), wherein the adhesive supply hole is formed from the side edge of the mounting surface to the adhesive flow path and does not reach the side edge of the sealing portion. (5) The door weatherstrip according to (1) or (2), wherein the slit has a non-linear portion. (6) A method for manufacturing a door weatherstrip comprising an extrusion molding section and an injection molding section connected together, a mounting base attached to the periphery of a vehicle door, and a hollow sealing section that is pressed against the vehicle body when the vehicle door is closed to seal the inside and outside of the vehicle, wherein the mounting base of the injection molding section has a slit for removing the core for molding the hollow sealing section during injection molding, and at least a portion of the longitudinal direction of the slit, a first opposing surface and a second opposing surface that are opposite each other across the slit are joined by adhesive, A hole forming step is to form an adhesive supply hole in the mounting base of the injection molded part, which communicates with the adhesive supply area between the first opposing surface and the second opposing surface. A method for manufacturing a door weatherstrip, comprising a supply step of supplying adhesive to the adhesive supply area through the adhesive supply hole. (7) In at least the adhesive supply area, one of the first opposing surface and the second opposing surface is formed in a convex shape, and the other is formed in a concave shape that can accept the convex shape of the other surface. The method for manufacturing a door weatherstrip according to (6), wherein when the first opposing surface and the second opposing surface are brought into contact with each other, the mounting surface side edge and the sealing portion side edge come into contact, and the intermediate portion is separated so that an adhesive flow path is formed along the slit. (8) The method for manufacturing a door weatherstrip according to (7), further comprising a contact step between the hole forming step and the supply step, wherein the first opposing surface and the second opposing surface are brought into contact with each other. [Effects of the Invention]

[0007] According to the methods of (1) and (6), an adhesive injection hole is formed that communicates with the adhesive injection space, and by supplying an appropriate amount of adhesive from the adhesive injection hole, the adhesive can be supplied to the appropriate location, thus avoiding the accidental supply of adhesive to surrounding areas outside the slit or the occurrence of poor adhesion due to insufficient adhesive.

[0008] According to method (2), the opening width of a part of the slit is enlarged and the adhesive injection port is formed adjacent to the slit, so that the adhesive can be efficiently introduced into the adhesive injection space.

[0009] According to the means of (3) and (7), the mounting surface side edges and sealing side edges of the first opposing surface and the second opposing surface are in contact, and an adhesive channel is formed in the intermediate portion. That is, a nearly sealed microchannel is formed in the adhesive injection space. As a result, the adhesive injected from the adhesive injection port flows into the adhesive channel mainly by capillary action, so the adhesive can be efficiently distributed throughout the entire bonding area without requiring a large injection pressure. Conversely, since capillary action does not occur in areas where an adhesive channel is not formed by the uneven grooves, it is possible to avoid the adhesive from inadvertently flowing outside the bonding area without having to form a damming wall or the like. Furthermore, since the mounting surface side edges and sealing side edges of the first opposing surface and the second opposing surface are in contact, it is also possible to prevent the adhesive from leaking out of the adhesive channel from the mounting surface side or the sealing side to the outside.

[0010] According to the method of (4), since the adhesive injection hole does not reach the side edge of the seal portion, it is possible to prevent the adhesive injected from the adhesive injection hole from leaking out to the seal portion side.

[0011] According to the means of (5), the first opposing surface and the second opposing surface can be easily positioned in the non-linear portion of the slit, so that the area around the slit can be joined without misalignment.

[0012] According to the means of (8), adhesive can be supplied to the adhesive supply area while the first opposing surface and the second opposing surface are positioned. [Brief explanation of the drawing]

[0013] [Figure 1] This is a front view of the door weatherstrip. [Figure 2] This is a magnified perspective view of the key parts of the door weatherstrip before it is joined together. [Figure 3] It is a sectional view taken along line III-III of FIG. 2. [Figure 4] It is a sectional view taken along line IV-IV of FIG. 2. [Figure 5] It is an enlarged perspective view of the main part of the door weatherstrip in the joined state. [Figure 6] It is a sectional view taken along line VI-VI of FIG. 5. [Figure 7] It is a sectional view taken along line VII-VII of FIG. 5. [Figure 8] It is an enlarged perspective view near the second opposing surface of the adhesive supply area.

Embodiments for Carrying Out the Invention

[0014] Hereinafter, representative embodiments of the present invention will be specifically described by way of example. The door weatherstrip 1 of this embodiment (hereinafter simply referred to as the weatherstrip) is a long member arranged at the peripheral edge of a vehicle door 2 such as an automobile (hereinafter simply referred to as the door), and a plurality of injection-molded parts 10 and an extrusion-molded part 20 are respectively connected and are annular as a whole. The injection-molded part 10 is an injection-molded product and is arranged at the peripheral corner part of the door 2. The extrusion-molded part 20 is an extrusion-molded product and is basically arranged at the peripheral straight part of the door 2. However, in this embodiment, one extrusion-molded part 20 is arranged from the lower half of the door 2 to the entire vertical rear edge part of the vehicle. Reference numeral 3 is a door panel, and reference numeral 4 is a side window cormorant is.

[0015] FIG. 1 shows the state (phantom line) of the right front door viewed from the inside of the vehicle, but the weatherstrip 1 can also be arranged on the left front door, the left and right rear doors, and the back door, etc. Also, the lower corner part of the door 2 may be used as the injection-molded part 10, or if it is a part with a relatively large curvature, the part of the injection-molded part 10 shown in FIG. 1 can be used as the extrusion-molded part 20.

[0016] As the material for molding the weatherstrip 1, materials that can be injection molded or extruded can be used, specifically, thermoplastic elastomers, soft synthetic resins such as polyvinyl chloride, elastic materials made of rubber such as EPDM, or foams thereof. It is preferable that the injection molded part 10 and the extruded part 20 are made of the same material (for example, EPDM), but they may be made of different materials.

[0017] When manufacturing the weatherstrip 1, the pre-formed extruded portion 20 is set in the cavity of the injection mold so that its end faces the cavity, and molten material is injected into the cavity, thereby injection molding the injection molded portion 10 and joining the end of the injection molded portion 10 to the end of the extruded portion 20. At this time, a core for forming the hollow seal portion 12 of the injection molded portion 10 is placed inside the cavity of the injection mold.

[0018] The weatherstrip 1 has a substantially uniform shape along its entire longitudinal direction and integrally comprises a mounting base and a hollow sealing portion. Specifically, as shown in Figure 2, the injection-molded portion 10 integrally comprises a mounting base 11 and a hollow sealing portion 12, and the extruded portion 20 also integrally comprises a mounting base 21 and a hollow sealing portion 22. As shown in Figures 3 to 6, the mounting bases 11 and 21 are flat plates and are the parts that are attached and fixed to the door panel 3 of the door 2. Therefore, protruding legs 13 and 23 that abut against the door panel 3 are formed along the entire longitudinal direction of the outer and inner edges of the mounting surface side of the mounting bases 11 and 21, respectively. The hollow sealing portions 12 and 22 are the parts that are pressed against the vehicle body 5 when the door 2 is closed and seal the inside and outside of the vehicle. In addition, lip portions 14 and 24 are integrally formed on the outer side of the hollow sealing portions 12 and 22. When door 2 is closed, the tips of lip sections 14 and 24 also elastically contact the vehicle body 5.

[0019] Furthermore, as a difference in shape between the injection-molded section 10 and the extrusion-molded section 20, a slit 15 for removing the core is formed in the mounting base 11 of the injection-molded section 10. The slit 15 has a longitudinal dimension that allows the core to be removed after injection molding, and after the core is removed, at least a portion of the longitudinal direction, the first opposing surface 15l and the second opposing surface 15r, which face each other across the slit 15, are joined by adhesive. On the other hand, the mounting base 21 of the extrusion-molded section 20 is provided with a number of through holes in a part not shown, and the weatherstrip 1 is fixed to the door panel 3 by inserting clips (not shown) through these through holes.

[0020] As shown in Figure 2, the slit 15 is formed linearly in the widthwise center of the mounting base 11, but has a non-linear portion in the longitudinal center. In this embodiment, the non-linear portion is bent in the widthwise direction (vehicle inward / outward direction) to form a V-shape. Furthermore, in this embodiment, the bent portion is used as the joining region, i.e., the adhesive supply region S.

[0021] As shown in Figure 3, in the adhesive supply area S, the first opposing surface 15l has a convex shape, and the second opposing surface 15r has a concave shape that can accommodate the convex shape of the first opposing surface 15l. Note that "convex" and "concave" refer to the convex or concave shape being continuously formed in the longitudinal direction (along the slit 15). The amount of protrusion of the first opposing surface 15l is smaller than the amount of recess of the second opposing surface 15r. In contrast, in areas other than the adhesive supply area S, as shown in Figure 4, both the first opposing surface 15l and the second opposing surface 15r are flat. The opening width t1 of the slit 15 in the adhesive supply area S is smaller than the opening width t2 of the slit 15 in areas other than the adhesive supply area S (t1 <t2)

[0022] When joining with adhesive, as shown in Figure 5, the first opposing surface 15l and the second opposing surface 15r are brought into contact in the adhesive supply area S. Then, as shown in Figure 6, the convex first opposing surface 15l fits into the concave second opposing surface 15r, allowing the first opposing surface 15l and the second opposing surface 15r to be positioned vertically, and the mounting surface side edges 15ld·15rd and the sealing portion side edges 15lu·15ru come into contact. On the other hand, in the vertical middle portion of the mounting base 11, the first opposing surface 15l and the second opposing surface 15r are spaced apart. This spaced-apart area is formed along the slit 15 as an adhesive flow path w.

[0023] Furthermore, as shown in Figures 2 and 5, an adhesive supply hole 16 is formed in the mounting base 11 of the injection molding section 10, which communicates with the adhesive flow path w of the adhesive supply area S. In this embodiment, as shown in Figures 7 and 8, the adhesive supply hole 16 is formed by recessing a part of the second opposing surface 15r in the width direction in the opposite direction to the slit 15 (towards the vehicle side). Also, as shown in Figure 7, the adhesive supply hole 16 is formed from the mounting surface side edge 15rd to the adhesive flow path w, and does not reach the seal section side edge 15ru.

[0024] Next, the procedure (manufacturing method) from the production of the weatherstrip 1 to the joining of the slit 15 will be described. First, as described above, the extruded part 20 is pre-formed, and the end of this extruded part 20 is set to face the cavity of the injection mold for forming the injection molded part 10, and a core for forming the hollow seal part 12 is placed inside the cavity. By injecting molten material into the cavity in this state, the injection molded part 10 including the hollow seal part 12 is injection molded as shown in Figure 2, and the end of the injection molded part 10 and the end of the extruded part 20 are joined and connected. The core is also provided with forming surfaces for forming the slit 15 and adhesive supply hole 16, and the slit 15 and adhesive supply hole 16 are formed simultaneously with the injection molding (hole formation process). Then, once the injection molded part 10 has hardened sufficiently, the core is removed from the slit 15 formed in the mounting base 11.

[0025] Next, as shown in FIGS. 5 and 6, in the adhesive supply region S for joining the slit 15, the first opposing surface 15l and the second opposing surface 15r are brought into contact with each other to form an adhesive flow path w (contacting step). The contact between the first opposing surface 15l and the second opposing surface 15r may be performed by hand by an operator or may be performed using a clamping jig or the like. At this time, the opening width t1 of the slit 15 in the adhesive supply region S is smaller than the opening width t2 of the slit 15 in the region other than the adhesive supply region S (t1 < t2), so that the contacting operation can be easily performed compared to other regions. Further, in the adhesive supply region S, the slit 15 is formed in a non-linear U-shape, and the first opposing surface 15l is formed in a convex stripe shape and the second opposing surface 15r is formed in a concave stripe shape. By fitting these concavities and convexities, the first opposing surface 15l and the second opposing surface 15r can be easily positioned in the longitudinal direction and the vertical direction.

[0026] In the present invention, a part of the slit 15 is made non-linear not for forming the clip insertion hole, but solely for enabling the positioning contact between the first opposing surface 15l and the second opposing surface 15r.

[0027] Next, an adhesive is supplied from the adhesive supply hole 16 (supply step). The supply of the adhesive may be performed using a dispenser or the like, or may be performed manually. At this time, as shown in FIG. 7, the adhesive supply hole 16 does not reach the side edge portion 15ru of the seal portion among the contact portions of the first opposing surface 15l and the second opposing surface 15r, so that the adhesive supplied from the adhesive supply hole 16 does not leak to the seal portion side. Then, as shown in FIG. 8, the adhesive G mainly penetrates along the adhesive flow path w in the depth direction and the longitudinal direction by capillary action. In the region other than the adhesive supply region S, as shown in FIG. 4, the first opposing surface 15l and the second opposing surface 15r are not in contact with each other, and the opening width t2 of the slit 15 is large and capillary action does not occur. Therefore, even if no dam wall or the like is provided, the adhesive G hardly flows out to the region other than the adhesive supply region S. Further, the adhesive G spreads in the flow path w also by gravity, the crimping between the first opposing surface 15l and the second opposing surface 15r, or the like. However, if the amount of the adhesive G is appropriate, it is difficult for the adhesive G to flow out to the region other than the adhesive supply region S.

[0028] The actual bonding area by adhesive G may be the entire adhesive supply area S, or only a part of it. The bonding area by adhesive G depends on the amount of adhesive G supplied. That is, a sufficient amount of adhesive G may be supplied to spread throughout the entire adhesive supply area S, or a relatively small amount may be supplied to spread the adhesive G to the vicinity of the adhesive supply hole 16, which is the minimum area where bonding is required. As for the adhesive, one with relatively low kinematic viscosity is preferable so that it can penetrate sufficiently deep inside by capillary action. Instant adhesives are preferred, but other adhesives may also be used.

[0029] Although typical embodiments of the present invention have been described above, the invention is not limited thereto, and various modifications are possible without departing from the spirit of the invention. For example, the adhesive supply hole 16 may be formed by recessing a part of the first opposing surface 15l, or by recessing a part of both the first opposing surface 15l and the second opposing surface 15r. Alternatively, the adhesive supply hole 16 may be placed adjacent to the slit 15 by recessing a part of the first opposing surface 15l or the second opposing surface 15r, or it may be placed at a position slightly away from the slit 15. In this case, a communication passage connecting the adhesive supply hole 16 and the adhesive flow path w is provided inside the mounting base 11.

[0030] The adhesive supply hole 16 basically only needs to be provided in one location, but it may be provided in multiple locations. Also, the adhesive supply hole 16 may be provided at the longitudinal end of the adhesive supply area S, or in the center.

[0031] Conversely to the above embodiment, the first opposing surface 15l may be a concave ridge and the second opposing surface 15r may be a convex ridge. In areas other than the adhesive supply area S, the first opposing surface 15l and the second opposing surface 15r may also be convex and concave ridges. The shapes of the first opposing surface 15l and the second opposing surface 15r are not particularly limited, as long as one is a concave ridge capable of receiving the convex ridge of the other. For example, in addition to being a semicircle as in the above embodiment, they can also be a triangle or a square. Furthermore, the first opposing surface 15l and the second opposing surface 15r do not necessarily have similar shapes. For example, the first opposing surface 15l may be a triangular convex ridge and the second opposing surface 15r may be a square concave ridge, and various combinations of shapes can be adopted.

[0032] The non-linear portion of the slit 15, which serves as the adhesive supply area S, can be bent in a V-shape, or it can be made into various patterns such as a semicircle, triangle, square, or step. Furthermore, the non-linear portion is not necessarily required.

[0033] In the hole formation process, it is preferable to form the adhesive supply hole 16 simultaneously with injection molding, but it may also be drilled after injection molding. [Explanation of Symbols]

[0034] 1. Door weatherstrip 2 vehicle doors 3 Door Panel 4 side windows 10 Injection molding section 11.21 Mounting base 12.22 Hollow seal section 13·23 Legs 14.24 Lip part 15 slits 15L First opposing surface 15r Second opposing surface 16 Adhesive supply holes G Adhesive S Adhesive supply area w Adhesive channel

Claims

1. A door weatherstrip comprising an extruded section and an injection-molded section connected together, a mounting base attached to the periphery of a vehicle door, and a hollow sealing section that is pressed against the vehicle body when the vehicle door is closed to seal the inside and outside of the vehicle, wherein the mounting base of the injection-molded section has a slit for removing the core for molding the hollow sealing section during injection molding, and at least a portion of the longitudinal direction of the slit, a first opposing surface and a second opposing surface facing each other across the slit are joined by adhesive, A door weatherstrip having an adhesive supply hole formed in the mounting base of the injection-molded portion, which communicates with the adhesive supply area between the first opposing surface and the second opposing surface.

2. The door weatherstrip according to claim 1, wherein the adhesive supply hole is formed by recessing a part of either one or both of the first opposing surface and the second opposing surface in the direction opposite to the slit.

3. At least in the adhesive supply area, one of the first opposing surface and the second opposing surface is formed in a convex shape, and the other is formed in a concave shape that can accept the convex shape of the first surface. The door weatherstrip according to claim 1 or claim 2, wherein when joined with an adhesive, the mounting surface side edges and sealing portion side edges of the first opposing surface and the second opposing surface come into contact, and in the intermediate portion, an adhesive flow path is formed along the slit, with the first opposing surface and the second opposing surface separated.

4. The door weatherstrip according to claim 3, wherein the adhesive supply hole is formed from the side edge of the mounting surface to the adhesive flow path and does not extend to the side edge of the sealing portion.

5. The door weatherstrip according to claim 1 or claim 2, wherein the slit has a non-linear portion.

6. A method for manufacturing a door weatherstrip comprising an extrusion molding section and an injection molding section connected together, a mounting base attached to the periphery of a vehicle door, and a hollow sealing section that is pressed against the vehicle body when the vehicle door is closed to seal the inside and outside of the vehicle, wherein the mounting base of the injection molding section has a slit for removing the core for molding the hollow sealing section during injection molding, and at least a portion of the longitudinal direction of the slit, a first opposing surface and a second opposing surface that are opposite each other across the slit are joined by adhesive, A hole forming step is to form an adhesive supply hole in the mounting base of the injection molded part, which communicates with the adhesive supply area between the first opposing surface and the second opposing surface. A method for manufacturing a door weatherstrip, comprising a supply step of supplying adhesive to the adhesive supply area through the adhesive supply hole.

7. In at least the adhesive supply area, one of the first opposing surface and the second opposing surface is formed in a convex shape, and the other is formed in a concave shape capable of receiving the convex shape of the first surface. The method for manufacturing a door weatherstrip according to claim 6, wherein when the first opposing surface and the second opposing surface are brought into contact with each other, the mounting surface side edge and the sealing portion side edge come into contact, and the intermediate portion is separated so that an adhesive flow path is formed along the slit.

8. A method for manufacturing a door weatherstrip according to claim 7, comprising a contact step between the hole forming step and the supply step, wherein the first opposing surface and the second opposing surface are brought into abutment and contact.

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