Pulp molded container lid, container assembly and processing process
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Solution Overview
Problem
Existing pulp molded container covers suffer from poor sealing performance and reduced demolding efficiency due to gaps between contact points, leading to leakage and difficulties in removing the cover.
Innovation Solution
A pulp molded container cover design featuring a continuous sealing surface formed by a lower inclined surface and an inner circular arc surface, with a lateral wing portion and roll-pressed annular groove to enhance sealing and demolding efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If multiple contact points are used for engagement between the cover and container, then the coupling strength is improved, but gaps are formed between contact points leading to poor sealing performance
Solution Approach 1:
The invention transitions from point contact engagement to surface contact engagement by designing a sealing surface that extends along the axial direction. The sealing surface includes an inclined surface and an arc surface that work together to provide continuous contact between the cover and container, eliminating gaps while maintaining coupling strength.
Solution Approach 2:
The invention incorporates an arc surface in the sealing structure that conforms to the container's outer wall curvature. This arc surface works in conjunction with the inclined surface to create a continuous sealing interface that adapts to the cylindrical geometry of the container, ensuring reliable sealing without compromising engagement strength.
2Strength
If multiple contact points are used for engagement, then the coupling strength is improved, but the demolding efficiency is degraded
Solution Approach 1:
The invention introduces a movable pressing member that can dynamically adjust the pressing force during the molding process. The pressing member moves along the axial direction to apply controlled pressure on the sealing surface, ensuring strong engagement during use while allowing easy release during demolding by reducing the pressing force.
Solution Approach 2:
The invention separates the engagement function from the sealing function by using distinct structural elements. The inclined surface provides the engagement mechanism while the arc surface provides the sealing function, allowing independent optimization of both functions and facilitating easier demolding while maintaining strong coupling.
3Reliability
If a continuous sealing surface is formed, then the sealing performance is improved, but the structural complexity is increased
Solution Approach 1:
The invention merges the sealing surface with the engagement structure by integrating the inclined surface and arc surface into the existing cover body. The sealing surface is formed as part of the cover's lateral inner wall structure, eliminating the need for separate sealing components and reducing overall structural complexity while achieving continuous sealing.
Data Source
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Figure 3
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AI summary
The present invention belongs to the technical field of pulp molding, and particularly relates to a pulp molded container cover, a container assembly and a processing method, overcoming defects of unreasonable design and the like in the prior art. The pulp molded container cover includes a cover top portion and a lateral inclined wing portion connected to an outer edge of the cover top portion. The pulp molded container cover further includes an outward downwardly inclined portion connected to a lower side of the lateral inclined wing portion and formed an acute included angle with an axial line of the lateral inclined wing portion; an external coupling arc portion connected to an outer edge of the outward downwardly inclined portion; and a lateral wing portion connected to a lower side of the external coupling arc portion facing away from the outwardly and downwardly inclined portion. A lower inclined surface of the outward downwardly inclined portion and an inner circular arc surface of the external coupling arc portion are connected to form a continuous sealing surface sealed with a container top portion. The present application has an advantage of improved sealing performance.