Press Punch Composite Surface for Adhesion and Wear Control
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Solution Overview
Problem
Existing press dies for compressing powdered or granular materials face issues such as material adhesion to pressing surfaces, abrasive wear, and costly, time-consuming maintenance, leading to contamination, quality issues, and high operational costs.
Innovation Solution
A press die design featuring a detachable carrier element and pressing element configuration, allowing for easy assembly, maintenance, and replacement, with a non-stick plastic coating on the pressing surface to minimize adhesion and wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If metal pressing surfaces are used with hardening or metal/ceramic coatings, then wear resistance is improved, but adhesion problems persist or worsen
Solution Approach 1:
The pressing surface uses a composite structure combining a metal base body with a plastic coating layer (such as polyethylene or polypropylene). This composite material approach allows the metal substrate to provide wear resistance while the plastic coating provides non-stick properties, successfully resolving the contradiction between wear resistance and adhesion prevention.
2Object-generated harmful factors
If elastomer inserts are used in recesses, then adhesion is reduced, but wear increases and replacement becomes complex
Solution Approach 1:
The patent employs a detachable pressing element made of plastic that can be easily replaced when worn. Instead of using durable but difficult-to-maintain elastomer inserts, the solution accepts that the pressing element will wear and provides a simple replacement mechanism, reducing maintenance complexity while maintaining non-stick properties.
3Strength
If presses are made entirely of hard steel, then structural strength is improved, but adhesion and contamination increase
Solution Approach 1:
The pressing device uses different materials for different parts: the base structure is made of hard steel for structural strength, while only the pressing surface contacts the material to be pressed and is coated with plastic to prevent adhesion and contamination. This local differentiation of material properties resolves the contradiction between structural strength and adhesion prevention.
4Power
If punches are exposed to high compression and friction forces, then pressing effectiveness is improved, but abrasive wear increases
Solution Approach 1:
The pressing element combines a metal substrate that withstands high compression forces with a plastic coating that resists abrasive wear from friction. The metal base body handles the compressive loads effectively while the plastic layer protects against wear, resolving the contradiction between pressing effectiveness and wear resistance.
Data Source
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AI summary
The present invention relates to a press ram (10) for pressing powdered or granular materials to form a pressed body, comprising a base body (11) extending along a longitudinal axis (L) and a press head (12) adjacent to the base body (11), wherein the press head (12) comprises a receiving element (13) and a carrier element (30) provided for releasable attachment to the receiving element (13), the press head (12) and/or the base body (11), wherein the carrier element (30) is designed and configured for attachment of a press element (14), and in that the press element (14) comprises an upper side (16) designed as a pressing surface (15) and a lower side (17) configured for attachment to the carrier element (30), wherein the pressing surface (15) of the press element (14) is designed and configured substantially for contact with the powdered or granular materials.The invention also relates to a press ram arrangement (25) and a rotary press.