Vehicle Glass Encapsulation Guide Piece Positioning
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Solution Overview
Problem
Existing vehicle glass encapsulation structures with fixed connections to guide pieces are prone to defects, leading to reduced yield due to exposure of guide pieces during the injection molding process, where molten plastic deformation occurs.
Innovation Solution
A glass encapsulation structure with a guide piece featuring a strip part, bumps, and positioning holes, combined with an injection molding device using positioning pins to maintain the guide piece's position and resist deformation, ensuring complete coverage by the encapsulation component.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a guide piece is pre-injection molded in the glass encapsulation to fix it with the quarter window, then the sealing and service life of the vehicle glass are improved, but the guide piece is prone to deformation and displacement during the injection molding process, leading to defects and reduced yield
Solution Approach 1:
Positioning holes are pre-formed on the guide piece before the injection molding process. These positioning holes receive positioning pins during injection molding, pre-establishing the correct spatial relationship between the guide piece and encapsulation component, thereby preventing deformation and displacement during the molding process
Solution Approach 2:
Positioning pins act as intermediary elements that connect the positioning holes on the guide piece with the encapsulation component. These pins maintain the predetermined position relationship between the guide piece and the encapsulation component during injection molding, preventing direct contact between molten plastic and the guide piece that could cause deformation
2Ease of manufacture
If the guide piece is fixed with the quarter window using existing encapsulation structures, then the connection is established, but the guide piece is exposed and not completely covered, reducing the yield of encapsulation structures
Solution Approach 1:
The positioning holes are pre-formed on the guide piece at locations that ensure complete coverage after encapsulation. This preliminary positioning ensures that the encapsulation component can fully cover the guide piece without exposure, while maintaining ease of manufacture through the pre-established positioning system
Solution Approach 2:
The mechanical connection system is enhanced by replacing simple fixed connection with a positioning pin-based system. This substitution ensures precise positioning and complete coverage of the guide piece by the encapsulation component, eliminating exposure defects while maintaining manufacturing ease
3Productivity
If molten plastic is used in the injection molding process to form the encapsulation component, then the encapsulation is formed, but the guide piece deforms and displaces due to the high temperature and pressure, causing defects
Solution Approach 1:
Positioning pins serve as intermediary elements that physically support the guide piece during the high-temperature and high-pressure injection molding process. These pins prevent the guide piece from deforming or displacing under the stress of molten plastic injection, maintaining shape stability while enabling productive encapsulation formation
Solution Approach 2:
The positioning holes and pins create a preliminary anti-action system that counteracts the deforming forces of molten plastic before they can cause damage. By pre-establishing this constraint system, the guide piece is protected from deformation and displacement during the injection molding process
Data Source
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AI summary
A glass encapsulation structure and an injection molding device are provided. The encapsulation structure includes: a guide piece; and an encapsulation component, wherein the guide piece is fixed to a side surface of a glass through the encapsulation component, wherein the guide piece includes a strip part, a bump and a positioning hole, wherein the strip part has a first surface, and a second surface opposite to the first surface and facing an interior of a vehicle body when the guide piece is mounted onto the vehicle body, the bump is located on and perpendicular to the first surface, the positioning hole is formed in the bump, an axis of the positioning hole is perpendicular to the side surface of the glass, and the positioning hole matches a positioning pin in an injection molding device in an injection molding process. A yield of encapsulation structures may be improved.