Weather strip and production method thereof

Abstract

A weather strip includes an extrusion molded extrusion molded portion, an injection molded portion which connects both ends of the extrusion molded portions in a straight line shape, a trim portion which is mounted on a circumferential edge of an opening of a luggage compartment, and a hollow sealing portion which protrudes from the trim portion. The injection molded portion is formed such that a width thereof is 2.0. The hollow sealing portion is provided with a core withdrawing hole, through which a core mold forming an inner peripheral surface of the hollow sealing portion is withdrawn after formation. The core withdrawing hole is formed such that a length thereof along a circumferential direction of the inner peripheral surface of the hollow sealing portion is 40% of a circumferential length of the inner peripheral surface.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a weather strip capable of sealing a gap between an opening of an automobile body or the like, and an opening / closing member for opening and closing the opening, and a production method thereof.[0003]2. Related Art[0004]Conventionally, a weather strip is installed at an edge portion of an opening which is formed in a body (automobile body) of an automobile or the like. The weather strip includes a trim portion of a substantially U-shaped cross section serving as a mounting base portion mounted on a flange portion which is provided along the edge portion of the opening, and a hollow sealing portion protruding from the trim portion and having a hollow portion. When an opening / closing member for opening and closing the opening is closed, a gap between the body and the opening / closing member is sealed by the pressing contact between the hollow sealing portion and the edge portion of the open...

AI Technical Summary

Benefits of technology

The present invention provides a weather strip with good appearance and sealing capability. The weather strip includes an extrusion-molded portion, an injection molded portion, a mounting base portion, and a hollow sealing portion. The injection molded portion has a narrow width in a region where it connects to the extrusion-molded portion, which prevents deterioration of the sealing capability. The hollow sealing portion has a core withdrawing hole and a front end lip, which prevents a decrease in the sealing capability when the weather strip is closed. The mounting base portion is a trim portion of a U-shaped cross section which is mounted along the opening of the body, and has an inner-peripheral-side sidewall portion and an outer-peripheral-side sidewall portion. The invention also provides a method for producing the weather strip and a vehicle with the weather strip.

Problems solved by technology

Therefore, there may be a problem in that if the front end of the core body is formed in a taper shape in view of ease of insertion, an insertion margin and a width of the injection molded portion are widened thereby lowering the productivity or increasing the cost.

Such a configuration can reduce the width dimension of a connecting portion, but since the hollow portion is clogged in the connecting portion, a load may be locally increased in the vicinity of the connecting portion when the opening / closing member is closed.

Further, since a groove of the trim portion or the like is clogged, a process of cutting the sheet material after the bonding process is inevitable.

Therefore, a problem such as a decrease in productivity or an increase in cost may occur.

In addition, a stepped portion is likely to form between the extrusion molded portion and the connecting portion, and there is a fear of a reduction of sealing capability.

However, in the weather strip disclosed in JP-A-7-164978, since the width (connecting width) of the injection molded portion in the longitudinal direction of the weather strip is relatively long, and the opening, which is used as an air discharging hole, as well as the core withdrawing hole, formed in the injection molded portion has a relatively large opening area, there is a concern that it may look unattractive, and the quality of the appearance is deteriorated.

In addition, since the large opening is formed in the injection molded portion, there is a concern that a load difference may be increased between the injection molded portion and the extrusion molded portion in the vicinity of the injection molded portion when the opening / closing member is closed, the sealing capability is deteriorated.

If such a support lip is provided, it may be difficult to carry out the core withdrawing operation.

Therefore, since the working of withdrawing the core body depends only on the deformation of the sealing wall side of the hollow sealing portion, it is difficult to carry out the core withdrawing operation.

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