Seal Member Preforming With Adhesive Coating to Limit Contamination
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing molding methods for seal members on base materials face issues with adhesive or pressure-sensitive adhesive contamination due to flow and peeling, leading to deteriorated adhesion and potential contamination of the base material.
Innovation Solution
A molding method involving a preforming step where a raw material is injected into a groove at a non-crosslinked temperature, followed by coating with an adhesive or pressure-sensitive adhesive, and then sandwiching the base material between molds for crosslinking to form the seal member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If adhesive or pressure-sensitive adhesive is coated on the base material before molding, then adhesion between the seal member and base material is improved, but the adhesive may flow and peel off due to injection pressure, causing contamination and deteriorated adhesion
Solution Approach 1:
The adhesive is coated on the seal member before the sealing process, allowing the adhesive to be positioned and prepared in advance. This preliminary coating ensures that when the seal member is later pressed against the base material, the adhesive is already in place and will not flow or peel off due to injection pressure, thus preventing contamination while maintaining strong adhesion.
2Strength
If adhesive is directly coated on the base material, then adhesion is improved, but the adhesive may scatter and contaminate the base material
Solution Approach 1:
The seal member serves as an intermediary carrier for the adhesive. Instead of coating the adhesive directly on the base material, it is first applied to the seal member, which then transfers the adhesive to the base material during the sealing process. This intermediary approach prevents scattering and contamination while ensuring precise adhesive placement and strong adhesion.
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
Reduces contamination of the base material by adhesive or pressure-sensitive adhesive, ensuring stable adhesion and minimizing contamination risks.
Implementation Method 1
molding the raw material onto the base material as the seal member via the adhesive or the pressure-sensitive adhesive at a temperature where the raw material is crosslinked
Implementation Method 2
coating a surface of the raw material with an adhesive or a pressure-sensitive adhesive
Data Source
AI summary
Disclosed herein is a molding method capable of reducing contamination of a base material. A molding method for molding a seal member onto a base material includes: a preforming step of injecting a rubber material into a groove at a temperature where the rubber material is not crosslinked, in a cavity plate including the groove into which the rubber material is injected; a coating step of coating a surface of the rubber material with an adhesive or pressure-sensitive adhesive, the rubber material being injected into the groove; and a vulcanization molding step of sandwiching the base material between the cavity plate on which the surface of the rubber material is coated with the adhesive or pressure-sensitive adhesive and a second mold, and molding the rubber material onto the base material as the seal member via the adhesive or pressure-sensitive adhesive at a temperature where the rubber material is crosslinked.