Flexible Mold Demolding Apparatus for Cementitious Products
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for demolding cementitious products, such as precast concrete blocks and bricks, often require complex and expensive machinery, leading to wear and tear, damage to the products, and inefficiencies due to the use of rigid molds which can distort flexible molds during removal.
Innovation Solution
A flexible mold assembly with a conveyor, clamp, and movable member that curves to disengage the mold from the cementitious material, along with a pusher to prevent material displacement, allowing for efficient demolding without damaging the products.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If reciprocating hammers are used to repeatedly hit the mold until blocks pop out, then the blocks can be removed from the mold, but the machinery suffers wear and tear and raises costs
Solution Approach 1:
The patent replaces the reciprocating hammer mechanical impact system with a controlled mechanical lifting system. The demolding apparatus uses a clamp to grip the mold and a lifting mechanism to gradually raise the mold, causing controlled separation between the mold and hardened blocks. This substitution eliminates repeated impact forces that cause wear and tear on machinery while maintaining effective demolding capability.
2Ease of operation
If reciprocating hammers are used to repeatedly hit the mold, then blocks can be removed, but the molded articles may be damaged or destroyed
Solution Approach 1:
The patent replaces the impact-based hammer system with a controlled lifting mechanism that applies gradual, uniform force. The clamp grips the mold securely and the lifting system raises it at a controlled rate, allowing the hardened blocks to separate cleanly from the mold without sudden impacts that could damage the product surfaces or edges.
Solution Approach 2:
The patent introduces dynamic control to the demolding process through the lifting mechanism. Instead of static or repetitive impact, the system provides continuous, adjustable motion that adapts to the separation process, maintaining optimal force application throughout the demolding sequence to prevent product damage.
3Ease of operation
If flexible molds are used, then demolding becomes easier, but the cavity walls are not rigid enough to produce straight products
Solution Approach 1:
The patent employs flexible molds made of elastomeric materials that can deform during the demolding process. The flexibility allows the mold to bend and release from the hardened blocks without requiring high removal forces. The mold's elastic properties enable it to return to its original shape after each use, maintaining dimensional accuracy for producing straight products despite the flexible material.
Solution Approach 2:
The patent utilizes the dynamic deformation capabilities of flexible molds during the lifting process. As the mold is raised, it can flex and adapt its shape to facilitate clean separation from the blocks. This dynamic behavior combines the ease of demolding with the ability to maintain precise cavity dimensions during the molding phase, ensuring straight product geometry.
4Ease of operation
If flexible molds are used, then demolding process is simplified, but the demolding process often damages the products
Solution Approach 1:
The patent uses flexible elastomeric molds that can deform and flex during the demolding process. This flexibility allows the mold to release from the hardened blocks through controlled bending and shape change rather than requiring forceful separation. The elastic material returns to its original form after each cycle, enabling simple repeated use without damaging the products.
Solution Approach 2:
The patent replaces complex impact-based demolding machinery with a simple lifting mechanism that works in conjunction with the flexible mold's inherent deformation capabilities. The clamp and lifting system provide controlled motion while the flexible mold's elasticity handles the separation mechanics, simplifying the overall process and eliminating product-damaging impacts.
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
Enables cost-effective and damage-free demolding of cementitious products by using a flexible mold assembly that reduces wear on machinery and maintains product integrity through controlled disengagement.
Implementation Method 1
a movable member for moving the clamp and the clamped portion of the mold upwardly causing the mold to curve about the holding member
Data Source
AI summary
An assembly for molding and demolding hardened cementitious products comprises a flexible mold and a demolding apparatus. The flexible mold has a top side with separate openings for receiving cementitious material therein for hardening thereof, an opposite closed rear side and a perimeter. The apparatus for demolding the hardened cementitious products from the flexible mold comprises a conveyor, a holding member, a clamp, and a movable member. The conveyor conveys the flexible mold. The clamp grips a portion of the perimeter. The holding member engages the mold. The movable member moves the clamp and the clamped portion of the mold about the holding member thereby disengaging the flexible mold from the cementitious material.