Pulp Molded Product Line with Roll Forming for Thickness Uniformity
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Solution Overview
Problem
The existing pulp molding process for creating cup lids and cups with annular buckles results in uneven thickness, increased material usage, and reduced production efficiency.
Innovation Solution
A pulp molded product line with roll forming function, incorporating a pulp suction device, hot pressing assembly, edge cutting device, and rolling device, which forms an annular convex buckle on the inner wall and a corresponding rolling groove on the outer wall of the pulp molded product, improving material usage and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an annular buckle is processed in a pulp molding process, then sealing performance and anti-falling performance are achieved, but the structure becomes unequal thickness, material input amount increases, and production efficiency decreases
Solution Approach 1:
The annular buckle is divided into two separate components: a convex buckle formed on the inner wall and a concave buckle formed on the outer wall. This segmentation allows each component to be formed independently with uniform thickness, eliminating the thickness inequality problem while maintaining the sealing function through the interaction of the two segmented parts.
Solution Approach 2:
Instead of forming a single uneven buckle structure, the invention inverts the approach by creating complementary convex and concave structures on opposite walls. The convex buckle on the inner wall and concave buckle on the outer wall work together to achieve the sealing function, with both components having uniform thickness throughout.
2Reliability
If an annular buckle is processed in a pulp molding process, then sealing performance and anti-falling performance are achieved, but material input amount increases
Solution Approach 1:
By segmenting the buckle into convex and concave components formed on opposite walls, the invention reduces material usage. The complementary structures allow for more efficient material distribution, eliminating the need for excessive material input that would be required to create a single thickened buckle structure.
Solution Approach 2:
The invention changes the geometric parameters of the buckle structure by creating thin-walled convex and concave forms rather than a single thickened structure. This parameter change reduces the overall material input amount while maintaining the sealing function through the interaction of the complementary surfaces.
3Reliability
If an annular buckle is processed in a pulp molding process, then sealing performance and anti-falling performance are achieved, but production efficiency is reduced
Solution Approach 1:
The segmentation of the buckle into convex and concave components allows for more efficient processing. Each component can be formed independently in the pulp molding process, enabling better control over the forming time and material application, which improves production efficiency while maintaining sealing performance.
Solution Approach 2:
By changing the structural parameters to thin-walled convex and concave forms, the invention reduces the processing time and material application requirements. This parameter change enables faster production cycles and improved efficiency while the complementary structures maintain the necessary sealing function.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution addresses the issues of uneven thickness and reduced efficiency by utilizing roll forming to create consistent products with improved sealing and anti-falling performance, while also reducing material waste and enhancing production speed.
Implementation Method 1
a hot pressing assembly configured to perform hot pressing on a pulp sucked by the pulp suction device to obtain a hot pressed pulp molded product
Implementation Method 2
a rolling device configured to perform radially inwards rolling on the unrolled pulp molded product obtained after the edge cutting of the edge cutting device to obtain a pulp molded product; an annular convex buckle is formed on an inner wall of the pulp molded product obtained after the rolling of the rolling device
Data Source
AI summary
A pulp molded product line with roll forming function includes a pulp suction device, a hot pressing assembly used to perform hot pressing on a pulp sucked by the pulp suction device to obtain a hot pressed pulp molded product, an edge cutting device used to perform edge cutting on the hot pressed pulp molded product to obtain an unrolled pulp molded product; and a rolling device used to perform radially inwards rolling on the unrolled pulp molded product to obtain a pulp molded product. The advantages of the pulp molded product line with roll forming function are that the waste problem of inconsistent material thickness by rolling can be solved, the raw materials can be saved and the production and processing efficiency can be improved.