JPH06460B2 - Waist seal - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waist seal covering a gap between an automobile door panel and a door glass.

2. Description of the Related Art In general, this type of waist seal is, for example, as shown in FIG. 1, a mounting base 3 fixed to a door panel 1 of a vehicle body through a mounting member 2 having a substantially U-shaped cross section, and this mounting base 3. And a door seal portion 5 extending elastically from a door glass 4 capable of moving up and down with respect to the door panel 1, and extending from the mounting base portion 3, the door panel 1 and the door glass 4
And the decorative portion 6 that covers the space between and are integrally formed by an extrusion molding method. Reference numeral 7 is a decorative member embedded in the decorative portion 6.

By the way, since the decorative portion 6 and the mounting base portion 3 are portions that are fixed to the door panel 1 for a long period of time, they are required to have high toughness, while the door seal portion 5 has a small sliding resistance on the door glass 4. Have to be contacted with
Therefore, it is required to have high elasticity. However,
Under the conventional state of the art, it has been difficult to obtain a waist seal material that simultaneously satisfies these conflicting requirements.

Therefore, conventionally, the entire waist seal 8 including the mounting base portion 3, the door seal portion 5 and the decoration portion 6 is integrally extruded with an elastic material having a relatively high elasticity, for example, rubber, while the toughness is required. The core metal 9 and the decorative member 7 are embedded in the base 3 and the decorative portion 6 at the same time during the extrusion molding.

However, when the waist seal 8 is molded by such a method, the core metal 9 and the like must be buried each time, so the molding efficiency is poor, and the management of parts such as the core metal 9 is complicated. However, there were drawbacks such as higher manufacturing costs.

OBJECT OF THE INVENTION The present invention has been made in view of such conventional drawbacks, and an object thereof is that molding efficiency is good,
It is to propose a waist seal that can simplify parts management and reduce manufacturing costs.

In order to achieve such an object, the present invention provides an ionomer resin having high toughness for a mounting base portion fixed to a door panel of a vehicle body and a decorative portion for covering a gap between the door panel and the door glass. A door seal portion that is used and elastically contacted with a door glass is formed by integrally extruding the attachment base portion, the decorative portion, and the door seal portion by using an elastic olefin thermoplastic elastomer.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. The same components as those in the conventional example are designated by the same reference numerals, and the duplicated description will be omitted.

FIG. 2 is a sectional view showing an embodiment of the waist seal according to the present invention.

As shown in FIG. 2, a mounting base portion 3 fixed to a door panel 1 of a vehicle body through a mounting member 2 having a substantially U-shaped cross section, and a gap between the door panel 1 and the door glass 4 are covered. The decorative portion 6 for improving the aesthetic appearance of the periphery is integrally extruded from an ionomer resin having high toughness.
On the other hand, a door seal portion 5 that is elastically contacted with a door glass 4 that can move up and down with respect to the door panel 1 with a small sliding resistance.
Is extruded integrally with the attachment base portion 3 and the decorative portion 6 from an elastic olefin thermoplastic elastomer.

The ionomer resin has excellent toughness, glossiness, oil resistance, moisture / air resistance, colorability, heat stability, and weather resistance. A suitable method is to prepare a copolymer of ethylene with an unsaturated compound containing a carboxylic acid such as acrylic acid, and then add a carboxyl group in the molecule to a hydroxide such as sodium, potassium or magnesium. It is made by neutralizing with alcohol and alcoholate. Further, the olefin-based thermoplastic elastomer is a polymeric substance having rubber-like elasticity, which is sold by Mitsui Petrochemical Industry Co., Ltd. under the trade name of "Milastomer resin", and is flexible, and is compatible with other resins and rubber materials. Compared with this, it has properties such as a low density, excellent heat resistance, cold resistance, weather resistance, and excellent moldability, and is suitable for the door seal portion. The ionomer resin and the olefin thermoplastic elastomer have the property of being easily joined to each other during extrusion molding.

On the outer surface of the decorative portion 6, along the longitudinal direction, the concave stripe portion 6 is formed.
a is formed, and a decorative member 7 made of a polyester film or the like coated with a transparent ionomer resin is vapor-deposited on the bottom surface of the recessed portion 6a. Further, the surface of the door seal portion 5 that comes into contact with the outer surface of the door glass 4 is provided with flocking 10 by an electrostatic flocking method or the like.

Waist seal 8 according to the present invention having such a configuration
According to A, since the ionomer resin forming the mounting base 3 and the decorative portion 6 and the olefin thermoplastic elastomer forming the door seal portion 5 have a property of being easily bonded to each other during an extrusion molding process, The base portion 3, the decorative portion 6 and the door seal portion 5 can be integrally extruded. Therefore, in comparison with the conventional waist seal (see FIG. 1) in which a cored bar is embedded in the mounting base portion to reinforce the mounting base portion, the mounting base portion 3 and the decorative portion 6 are required. The waist seal can be formed quickly and easily while satisfying the required toughness and elasticity required for the door seal portion 5, and the core metal can be eliminated, which simplifies parts management. It is possible to reduce the manufacturing cost.

Next, FIG. 3 is a cross-sectional view showing another embodiment of the present invention. In this embodiment, unlike the case of the above-mentioned embodiment, the joint base of the pair of door seal portions 5 is provided in the mounting base 3. The structure where the end is buried is adopted. Also in the case of this embodiment, as in the case of the above-mentioned embodiment, the mounting base portion 3 and the decorative portion 6 are integrally extruded from the ionomer resin, and the door seal portion 5 is integrally extruded from the olefin thermoplastic elastomer.

Also in this case, the waist seal 8B having both toughness and elasticity can be obtained without burying the cored bar inside.

EFFECTS OF THE INVENTION As is apparent from the above description, according to the present invention, the mounting base portion fixed to the door panel of the vehicle body and the decorative portion that covers the gap between the door panel and the door glass are molded with an ionomer resin having high toughness. In addition, since the door seal portion elastically contacted with the door glass is formed of the olefin thermoplastic elastomer having high elasticity, it is possible to integrally perform extrusion molding. Therefore, the performance required as a waist seal can be satisfied, a stable sealing force can be obtained, and since extrusion molding can be performed integrally, the molding efficiency is good, and a core metal is required. Therefore, the parts management can be simplified, the manufacturing cost can be reduced, and the density is small, so that the weight of the waist seal can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view showing a conventional waist seal, FIG. 2 is a sectional view showing an embodiment of a waist seal according to the present invention,
FIG. 3 is a sectional view showing another embodiment of the present invention. 1 ... Door panel, 3 ... Mounting base, 4 ... Door glass, 5 ...
Door seal part, 6 ... Decoration part, 8A, 8B ... Waist seal.

Claims (1)

[Claims] 1. A mounting base fixed to a door panel of a vehicle body, a door seal extending from the mounting base and elastically contacting a door glass that can move up and down with respect to the door panel, and extending from the mounting base. In a waist seal consisting of a decorative part that covers the gap between the door panel and the door glass, an ionomer resin that is rich in toughness is used for the mounting base part and the decorative part, and an olefin thermoplastic resin that is rich in elasticity of the door seal part. A waist seal, wherein the attachment base portion, the decorative portion, and the door seal portion are integrally extruded using an elastomer.