Double-color injection molding sealing strip and mounting structure thereof

Abstract

The invention discloses a double-color injection molding sealing strip and a mounting structure thereof, the double-color injection molding sealing strip comprises a soft rubber lip and a hard rubber base material, one end of the soft rubber lip is connected with one end of the hard rubber base material, and the other end of the hard rubber base material is provided with a limiting structure used for being connected with a rear vehicle door inner plate metal plate or a front vehicle door inner plate metal plate; the soft rubber lip is of an arc-shaped structure, and the end, connected with the soft rubber lip, of the hard rubber base material is of a hook-shaped structure. The double-color injection molding sealing strip is fixed to the rear vehicle door inner plate metal plate or the front vehicle door inner plate metal plate in a clamped connection or threaded connection or adhesive tape bonding mode. And the soft rubber lip is matched and hermetically connected with the front door outer plate metal plate or the front door fender metal plate. Different modeling requirements of a vehicle door assembly can be met, boundary lines and step differences do not exist in the appearance, the defect that stamping angles of a vehicle door outer plate metal plate are inconsistent is overcome, and the problem that when extrusion sections of traditional sealing strips cannot be matched, connecting angles need to be added to make up gaps is solved.

Description

Technical Field

[0001] This invention relates to a two-color injection-molded sealing strip and its installation structure, and more particularly to a two-color injection-molded sealing strip and its installation structure used for auxiliary sealing between gaps in automobile doors, belonging to the technical field of automotive sealing components. Background Technology

[0002] As the market demands increasingly higher aesthetic appeal from vehicle sealing components, the consistency of door assembly appearance and sheet metal stamping angles, among other factors, has become extremely poor. Figure 1 , Figure 2 As shown, traditional auxiliary sealing strips can no longer fully meet the requirements for auxiliary sealing appearance, dust and mud prevention, sealing and NVH (i.e., noise, vibration and harshness).

[0003] Currently, traditional auxiliary sealing strips are made using EPDM extrusion + EPDM corner splicing + spraying + fastening processes, which are complex, cumbersome, and not environmentally friendly. The process involves rubber heating and vulcanization, and the working environment is high temperature and high humidity. Auxiliary sealing strips use a variety of materials. Summary of the Invention

[0004] The technical problem to be solved by this invention is: 1. Resolve current appearance defects such as line marks, step differences, and color differences in auxiliary sealing strips; 2. To address the issues of excessive sealing force and NVH problems associated with traditional auxiliary sealing strips when there are uneven gaps between the door and side panel sheet metal; 3. When the sheet metal stamping angle is inconsistent, it can be formed in one step without the need for traditional sealing strip design to compensate for the gap; 3. The complex processes of traditional auxiliary sealing strips are reduced to a two-color one-time injection molding or two-time plastic coating molding process, thereby reducing the cost of parts.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is to provide a two-color injection molded sealing strip, characterized in that it includes a soft rubber lip and a hard rubber substrate, one end of the soft rubber lip and one end of the hard rubber substrate are connected, and the other end of the hard rubber substrate is provided with a limiting structure for connecting the sheet metal of the rear door inner panel or the sheet metal of the front door inner panel; the soft rubber lip has an arc-shaped structure, and the end of the hard rubber substrate connected to the soft rubber lip has a hook-shaped structure.

[0006] Preferably, a limiting protrusion is provided on the other end of the hard plastic substrate on the side away from the inner sheet metal of the rear door or the inner sheet metal of the front door. The limiting protrusion is located between the other end of the hard plastic substrate and the limiting structure, and is close to the limiting structure.

[0007] Preferably, at least one elastic protrusion is provided on the side of the hard plastic substrate that contacts the inner sheet metal of the rear door or the inner sheet metal of the front door, and one elastic protrusion is located at the other end of the hard plastic substrate.

[0008] Preferably, the soft rubber lip and the hard rubber substrate are integrally formed.

[0009] Preferably, the soft rubber lip is made of TPV material; the hard rubber substrate is made of PP material; and the buckle is made of plastic or metal.

[0010] An installation structure for a two-color injection-molded sealing strip is characterized in that the two-color injection-molded sealing strip is fixed to the inner sheet metal of the rear door or the inner sheet metal of the front door by means of snap-fit, screw-fit, or tape bonding; the soft rubber lip is matched and sealed to the outer sheet metal of the front door or the sheet metal of the front door fender.

[0011] Preferably, the limiting structure is a through hole for connecting the inner sheet metal of the rear door or the inner sheet metal of the front door via a buckle, and the two-color injection-molded sealing strip is fixed to the inner sheet metal of the rear door or the inner sheet metal of the front door via a buckle. The inner sheet metal of the rear door or the inner sheet metal of the front door is provided with through holes for engaging the buckle.

[0012] Preferably, the buckle includes a first limiting head, an insertion block, and a second limiting head. The first limiting head is connected to the second limiting head through the insertion block. The insertion block passes through the through hole and the through hole. The first limiting head is located on the side of the rear door inner panel sheet metal or the front door inner panel sheet metal away from the hard plastic substrate, and the maximum outer diameter of the first limiting head is greater than the diameter of the through hole. The second limiting head is located on the side of the hard plastic substrate away from the rear door inner panel sheet metal or the front door inner panel sheet metal, and the maximum outer diameter of the second limiting head is greater than the diameter of the through hole.

[0013] Preferably, the inner front door sheet metal is fixedly connected to a two-color injection-molded sealing strip via a snap fastener. The hook-shaped structure on the hard plastic substrate is fitted onto the outside of the connection between the inner and outer front door sheet metal. One end of the inner front door sheet metal is inserted into the hook section of the outer front door sheet metal, with the through hole and the perforation aligned. One end of the snap fastener passes through the through hole and the perforation in sequence until the other end of the snap fastener abuts against the hard plastic substrate. Each elastic protrusion on one side of the hard plastic substrate contacts the inner front door sheet metal. The arc end of the hook section of the outer front door and the side of the hook closer to the interior of the vehicle are provided with gaps. The part of the hard plastic substrate that is close to or attached to the inner front door sheet metal has the same shape as the inner front door sheet metal, which is a wavy structure or an arc-shaped bending structure.

[0014] Preferably, the inner rear door panel sheet metal is fixedly connected to a two-color injection-molded sealing strip via a snap fastener. A hook-shaped structure on the hard plastic substrate fits over the outer side of the connection between the inner and outer rear door panel sheet metal. One end of the inner rear door panel sheet metal is inserted into the hook section of the outer rear door panel sheet metal, with the through hole and perforation aligned. One end of the snap fastener passes through the through hole and perforation sequentially until the other end of the snap fastener abuts against the hard plastic substrate. The arc-shaped end of the hook section of the outer rear door panel and its position... A gap is provided on the side of the rear door outer panel hook section facing the interior of the vehicle; a bending groove is provided on the side of the hard plastic substrate near the rear door outer panel hook section, opening towards the rear door outer panel hook section; the part of the hard plastic substrate near or attached to the rear door inner panel sheet metal has the same shape as the front door inner panel sheet metal, both being straight structures or composed of two straight structures of different heights; an elastic protrusion is provided at the other end of the hard plastic substrate, and it abuts against the rear door inner panel sheet metal.

[0015] Compared with the prior art, the present invention has at least one of the following beneficial effects: 1. The sealing strip of the present invention has a simple structure, is easy to assemble, and has a beautiful appearance; 2. The cost is reduced by about 35% compared to traditional auxiliary sealing strips.

[0016] The molding process of this invention is simple (one-time two-color injection molding + snap-fit ​​assembly), which can meet different styling requirements of the car door assembly and has no dividing line or step difference in appearance. It makes up for the inconsistency of the stamping angle of the outer sheet metal of the car door and solves the problem of needing to add joints to make up for the gap when the extrusion section of the traditional sealing strip cannot match. Attached Figure Description

[0017] Figure 1 This is a side view of the vehicle. Figure 2 for Figure 1 The BB section view of the existing technology (the BB section view is the same as the AA section view); Figure 3 for Figure 1 AA cross-sectional view of the present invention; Figure 4 for Figure 1 BB cross-sectional view of the present invention.

[0018] in: 1 is the sheet metal of the inner rear door panel; 2 is the sheet metal of the outer rear door panel; 3 is the sheet metal of the outer front door panel; 4 is the sheet metal of the inner front door panel; 5 is the existing sealing strip; 6 is the sealing strip; 7 is the sheet metal of the front door fender; 8 is the gap. 2-1 is the outer section of the rear door outer panel; 2-2 is the transition section of the rear door outer panel; 2-3 is the hook section of the rear door outer panel; 3-1 is the outer section of the front door outer panel; 3-2 is the transition section of the front door outer panel; 3-3 is the hook section of the front door outer panel; 6-1 is the soft rubber lip; 6-2 is the hard rubber base material; 6-3 is the buckle; 6-2-1 is an elastic protrusion; 6-2-2 is a limiting protrusion; 6-2-3 is a bending groove; 6-3-1 is the first limit head; 6-3-2 is the insertion block; 6-3-3 is the second limit head. Detailed Implementation

[0019] This invention provides a two-color injection-molded sealing strip for auxiliary sealing between the front door fender and the front door sheet metal, and between the front and rear door sheet metal (i.e., between the gaps in the car doors). Figure 1 , Figure 3 , Figure 4 As shown, it includes a soft rubber lip 6-1 and a hard rubber substrate 6-2. One end of the soft rubber lip 6-1 is connected to one end of the hard rubber substrate 6-2, and the other end of the hard rubber substrate 6-2 is provided with a through hole for connecting a buckle 6-3.

[0020] The soft rubber lip 6-1 has an arc-shaped structure. The end of the hard rubber substrate 6-2 connected to the soft rubber lip 6-1 has a hook-shaped structure. On the other end of the hard rubber substrate 6-2, a limiting protrusion 6-2-2 is provided on the side away from the rear door inner panel sheet metal 1 or the front door inner panel sheet metal 4. The limiting protrusion 6-2-2 is located between the other end of the hard rubber substrate 6-2 and the through hole, and is close to the through hole.

[0021] At least one elastic protrusion 6-2-1 is provided on one side of the hard plastic substrate 6-2 that contacts the rear door inner panel sheet metal 1 or the front door inner panel sheet metal 4, and one of the elastic protrusions 6-2-1 is located at the other end of the hard plastic substrate 6-2.

[0022] The soft rubber lip 6-1 is made of TPV (Thermoplastic Vulcanizate); the hard rubber substrate 6-2 is made of PP (Polypropylene); and the clip 6-3 is made of plastic or metal. The soft rubber lip 6-1 and the hard rubber substrate 6-2 are integrally molded. The soft rubber lip 1-1 matches and seals / covers gaps with the front door outer panel sheet metal 3 or the front door fender sheet metal 7 (depending on styling requirements, the soft rubber lip can be matched with interference or gaps). This invention also provides an installation structure for a two-color injection-molded sealing strip, such as... Figure 1 , Figure 3 , Figure 4 As shown, it includes a two-color injection molded sealing strip, which is fixed to the inner panel sheet metal 1 of the rear door or the inner panel sheet metal 4 of the front door by a snap-fit ​​method.

[0023] In this embodiment, the two-color injection-molded sealing strip is fixed to the rear door inner panel sheet 1 or the front door inner panel sheet 4 by a buckle 6-3. The rear door inner panel sheet 1 or the front door inner panel sheet 4 is provided with through holes for engaging the buckle 6-3, wherein the buckle 6-3 is made of plastic or metal.

[0024] The buckle 6-3 includes a first limiting head 6-3-1, an insertion block 6-3-2, and a second limiting head 6-3-3. The first limiting head 6-3-1 is connected to the second limiting head 6-3-3 through the insertion block 6-3-2. The insertion block 6-3-2 passes through the through hole and the through hole. The first limiting head 6-3-1 is located on the side of the rear door inner panel sheet metal 1 or the front door inner panel sheet metal 4 away from the hard plastic substrate 6-2, and the maximum outer diameter of the first limiting head 6-3-1 is larger than the diameter of the through hole. The second limiting head 6-3-3 is located on the side of the hard plastic substrate 6-2 away from the rear door inner panel sheet metal 1 or the front door inner panel sheet metal 4, and the maximum outer diameter of the second limiting head 6-3-3 is larger than the diameter of the through hole.

[0025] The front door outer panel sheet metal 3 includes the front door outer panel section 3-1, the front door outer panel transition section 3-2, and the front door outer panel hook section 3-3. The front door outer panel section 3-1 is connected to the front door outer panel hook section 3-3 through the front door outer panel transition section 3-2. The rear door outer panel sheet metal 2 includes the rear door outer panel section 2-1, the rear door outer panel transition section 2-2, and the rear door outer panel hook section 2-3. The rear door outer panel section 2-1 is connected to the rear door outer panel hook section 2-3 through the rear door outer panel transition section 2-2.

[0026] In this embodiment, the first limiting head 6-3-1 has a W-shaped structure, and the larger end of the W-shape is close to the side of the rear door inner panel sheet metal 1 or the front door inner panel sheet metal 4, while the smaller end of the W-shape is smaller than the diameter of the through hole and the through hole.

[0027] like Figure 3The diagram illustrates the connection between the inner front door panel 4 and a two-color injection-molded sealing strip via clips 6-3. A hook-shaped structure on the hard plastic substrate 6-2 fits over the outer side of the connection between the inner front door panel 4 and the outer front door panel 3. One end of the inner front door panel 4 is inserted into the hook section 3-3 of the outer front door panel 3. The through hole and the perforation are then aligned. The first limiting head 6-3-1 of the clip 6-3 passes through the through hole and the perforation sequentially until the second limiting head 6-3-3 abuts against the hard plastic substrate 6-2. Each elastic protrusion 6-2-1 on one side of the hard plastic substrate 6-2 contacts the inner front door panel 4. The first limiting head 6-3-1 has elastic sides in its W-shape. When the small end of the first limiting head 6-3-1 passes through the through hole and the perforation, the two sides of the W-shape converge towards the middle. After passing through the through hole and the perforation, it returns to its original shape, so that the large end of the first limiting head 6-3-1 abuts against the side wall of the inner panel sheet metal 4 of the front door, preventing the buckle 6-3 from falling off. The arc end of the hook section 3-3 of the outer panel of the front door and the side of the hook facing towards the inside of the vehicle are provided with a gap 8. The part of the hard plastic substrate 6-2 that is close to or attached to the inner panel sheet metal 4 of the front door has the same shape as the inner panel sheet metal 4 of the front door, which is a wave-shaped structure or an arc-shaped bending structure. One side of the second limiting head 6-3-3 abuts against one side of the limiting protrusion 6-2-2, and the hard plastic substrate 6-2 is provided on the other side of the limiting protrusion 6-2-2 to limit the position of the other side of the limiting protrusion 6-2-2.

[0028] like Figure 4The diagram illustrates how a two-color injection-molded sealing strip is fixedly connected to the inner rear door panel 1 via a clip 6-3. A hook-shaped structure on the hard plastic substrate 6-2 fits over the outer side of the connection between the inner rear door panel 1 and the outer rear door panel 2. One end of the inner rear door panel 1 is inserted into the hook section 2-3 of the outer rear door panel 2. The through hole and the perforation are then aligned. The first limiting head 6-3-1 of the clip 6-3 passes through the through hole and the perforation sequentially until the second limiting head 6-3-3 abuts against the hard plastic substrate 6-2. The W-shaped sides of the first limiting head 6-3-1 are elastic. When the smaller end of the first limiting head 6-3-1 passes through the through hole and the perforation, the two sides of the W-shape converge towards the center. After passing through the through hole and the perforation, it returns to its original shape, thus allowing the larger end of the first limiting head 6-3-1 to abut against the side wall of the inner rear door panel 1, preventing the clip 6-3 from falling off. The curved end of the hook section 2-3 of the rear door outer panel and the side of the hook section 2-3 facing the interior of the vehicle have gaps 8. The hard plastic substrate 6-2 has a bending groove 6-2-3 opening towards the hook section 2-3 on the side near the hook section 2-3, facilitating bending of the hard plastic substrate 6-2 under stress. The portion of the hard plastic substrate 6-2 near or attached to the inner rear door sheet metal 1 has the same shape as the inner front door sheet metal 4, both being straight structures or composed of two straight structures of different heights. The insertion block 6-3-2 at the position of the inner rear door sheet metal 1 has slots on both sides near the second limiting head 6-3-3, for engaging with the side walls of the through hole on both sides of the hard plastic substrate 6-2. One side of the second limiting head 6-3-3 abuts against one side of the limiting protrusion 6-2-2. An elastic protrusion 6-2-1 is located at the other end of the hard plastic substrate 6-2 and abuts against the inner panel 1 of the rear door.

[0029] In another embodiment, the two-color injection-molded sealing strip (actually connected by a hard plastic substrate 6-2) can also be fixed to the rear door inner panel sheet metal 1 or the front door inner panel sheet metal 4 by means of screwing, tape bonding, etc.

Claims

1. A two-color injection molded weather strip, characterized by, The double-color injection molding sealing strip comprises a soft rubber lip (6-1) and a hard rubber base material (6-2), one end of the soft rubber lip (6-1) is connected with one end of the hard rubber base material (6-2), and the other end of the hard rubber base material (6-2) is provided with a limiting structure for connecting the rear door inner panel metal plate (1) or the front door inner panel metal plate (4); the soft rubber lip (6-1) is in an arc line structure, and the end of the hard rubber base material (6-2) connected with the soft rubber lip (6-1) is in a hook structure.

2. A two-color injection molded weather strip as defined in claim 1, wherein, The other end of the hard rubber base material (6-2) is provided with a limiting protrusion (6-2-2) on the side away from the rear door inner panel metal plate (1) or the front door inner panel metal plate (4), the limiting protrusion (6-2-2) is arranged between the other end of the hard rubber base material (6-2) and the limiting structure, and is close to the limiting structure.

3. A two-color injection molded weather strip as defined in claim 1 wherein, The side of the hard rubber base material (6-2) contacting the rear door inner panel metal plate (1) or the front door inner panel metal plate (4) is provided with at least one elastic protrusion (6-2-1), and one elastic protrusion (6-2-1) is located at the position of the other end of the hard rubber base material (6-2).

4. A two-color injection molded weather strip as defined in claim 1, wherein, The soft rubber lip (6-1) and the hard rubber base material (6-2) are integrally formed.

5. A two-color injection molded weather strip as defined in claim 1 wherein, The soft rubber lip (6-1) is made of TPV material; the hard rubber base material (6-2) is made of PP material; and the buckle (6-3) is made of plastic material or metal material.

6. The mounting structure of the dual-color injection-molded sealing strip according to any one of claims 1 to 5, characterized by The double-color injection molding sealing strip is fixed on the rear door inner panel metal plate (1) or the front door inner panel metal plate (4) through clamping, screwing or adhesive tape bonding; the soft rubber lip (1-1) is matched and sealed with the front door outer panel metal plate (3) or the front door fender metal plate (7).

7. The mounting structure of a dual-color injection-molded sealing strip according to claim 6, characterized by The limiting structure is a through hole for connecting the rear door inner panel metal plate (1) or the front door inner panel metal plate (4) through the buckle (6-3), the double-color injection molding sealing strip is fixed on the rear door inner panel metal plate (1) or the front door inner panel metal plate (4) through the buckle (6-3), and the rear door inner panel metal plate (1) or the front door inner panel metal plate (4) is provided with a perforation for clamping the buckle (6-3).

8. The mounting structure of a dual-color injection-molded sealing strip according to claim 7, wherein The buckle (6-3) comprises a first limiting head (6-3-1), an insertion block (6-3-2) and a second limiting head (6-3-3), the first limiting head (6-3-1) is connected with the second limiting head (6-3-3) through the insertion block (6-3-2), the insertion block (6-3-2) is arranged in the perforation and the through hole, the first limiting head (6-3-1) is located on the side of the rear door inner panel metal plate (1) or the front door inner panel metal plate (4) away from the hard rubber base material (6-2), and the maximum outer diameter of the first limiting head (6-3-1) is greater than the diameter of the perforation, and the second limiting head (6-3-3) is located on the side of the hard rubber base material (6-2) away from the rear door inner panel metal plate (1) or the front door inner panel metal plate (4), and the maximum outer diameter of the second limiting head (6-3-3) is greater than the diameter of the through hole.

9. The mounting structure of a dual-color injection-molded sealing strip according to claim 8, wherein The front door inner plate metal plate (4) is fixedly connected with the double-color injection molding sealing strip through the buckle (6-3), the hook-shaped structure on the hard rubber base material (6-2) is sleeved outside the connection part of the front door inner plate metal plate (4) and the front door outer plate metal plate (3), one end of the front door inner plate metal plate (4) is inserted into the front door outer plate hook section (3-3) of the front door outer plate metal plate (3), the through hole is aligned with the perforation, one end of the buckle (6-3) passes through the through hole and the perforation in sequence until the other end of the buckle (6-3) abuts on the hard rubber base material (6-2); each elastic lug (6-2-1) on one side of the hard rubber base material (6-2) is in contact with the front door inner plate metal plate (4); the arc end part of the front door outer plate hook section (3-3) and the side of the hook close to the inside of the vehicle are provided with a gap (8); the part close to or attached to the front door inner plate metal plate (4) on the hard rubber base material (6-2) is of the same shape as the front door inner plate metal plate (4), and is of a wave-shaped structure or an arc bending structure.

10. The mounting structure of a dual-color injection-molded weather strip according to claim 8, wherein The rear door inner plate metal plate (1) is fixedly connected with the double-color injection molding sealing strip through the buckle (6-3), the hook-shaped structure on the hard rubber base material (6-2) is sleeved outside the connection part of the rear door inner plate metal plate (1) and the rear door outer plate metal plate (2), one end of the rear door inner plate metal plate (1) is inserted into the rear door outer plate hook section (2-3) of the rear door outer plate metal plate (2), the through hole is aligned with the perforation, one end of the buckle (6-3) passes through the through hole and the perforation in sequence until the other end of the buckle (6-3) abuts on the hard rubber base material (6-2); the arc end part of the rear door outer plate hook section (2-3) and the side of the rear door outer plate hook section (2-3) close to the inside of the vehicle are provided with a gap (8); one side of the hard rubber base material (6-2) close to the position of the rear door outer plate hook section (2-3) is provided with a bending groove (6-2-3) opening towards the rear door outer plate hook section (2-3); the part close to or attached to the rear door inner plate metal plate (1) on the hard rubber base material (6-2) is of the same shape as the front door inner plate metal plate (4), and is of a straight structure or is composed of two straight structures of different heights; the end part of the other end of the hard rubber base material (6-2) is provided with an elastic lug (6-2-1), and abuts against the rear door inner plate metal plate (1).

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