Fiber-Reinforced Plastic Coating for Complete End-Surface Coverage
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Solution Overview
Problem
Existing methods for coating fiber-reinforced plastics fail to adequately coat both surfaces and end surfaces, particularly due to burrs generated during molding, leading to incomplete or peeled-off coatings.
Innovation Solution
A method involving a pair of upper and lower molds is used to press a coating material onto both surfaces and end surfaces of fiber-reinforced plastics, ensuring complete coverage by controlling mold clearance and using reactive coating materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If in-mold coating method is used to coat fiber-reinforced plastic immediately after molding, then coating efficiency is improved, but end surface and back surface cannot be coated due to burrs blocking the coating material flow
Solution Approach 1:
The coating process is divided into two distinct stages: first coating the main surfaces during in-mold coating, then separately treating the end surfaces after deburring. This segmentation allows each surface type to receive appropriate coating treatment without interference from burrs.
Solution Approach 2:
The in-mold coating is performed preliminarily on the main surfaces before the part is removed from the mold and deburred. This preliminary action ensures that the largest surfaces are coated efficiently while the part is still in the mold, then subsequent coating addresses the end surfaces after burr removal.
2Manufacturing precision
If open press coating method is used to coat fiber-reinforced plastic, then end surface coating can be achieved, but coating completeness remains insufficient and additional processing is required
Solution Approach 1:
The invention merges the advantages of in-mold coating (efficient main surface coating) with open press coating (capable end surface coating) into a unified two-stage process. The first stage uses in-mold coating for the main surfaces, and the second stage uses open press coating for the end surfaces, achieving complete coverage.
3Manufacturing precision
If burrs are removed by filing after in-mold coating, then surface quality is improved, but coating is peeled off from non-burr areas
Solution Approach 1:
The end surface coating is performed as a preliminary action before deburring. By coating the end surfaces while the part is still in the mold or immediately after removal but before burr removal, the coating is applied to the as-molded surface. Subsequent burr removal then occurs without compromising coating adhesion on the good surface areas.
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
This approach allows for efficient coating of both surfaces and end surfaces of fiber-reinforced plastics, preventing burrs and ensuring a stable, adherent coating film.
Implementation Method 1
the flow of the coating material 4 is prevented by the burr 19
Implementation Method 2
using reactive coating materials
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
Provided is a method for applying pressure to a coating material and a fiber-reinforced plastic using a male-female pair of upper and lower molds and producing a coated fiber-reinforced plastic, wherein: the fiber-reinforced plastic includes at least a first surface A, a second surface B, and an end surface C connecting to the first surface A and the second surface B; the first surface A and the second surface B each face separate molds when pressure is applied to the fiber-reinforced plastic using the male-female pair of upper and lower molds; from the start to the end of pressure application, the coating material first comes into contact with at least part of the first surface A, and then the coating material comes into contact with at least part of at least one of the second surface B and the end surface C, whereby the fiber-reinforced plastic is coated; and any of the two surfaces and the end surface of the fiber-reinforced plastic are coated within the mold through the method for producing a coated fiber-reinforced plastic.