Plastic Profile Sealing Machine with V-Shaped Lateral Containment
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Solution Overview
Problem
Existing machines for sealing plastic profiled elements, such as PVC, face issues with the formation of excess sealing beads, which require extensive removal processes, leading to increased machining time, costs, and quality inconsistencies due to irregular shapes and deformation phenomena, especially when dealing with different environmental and extrusion conditions.
Innovation Solution
A machine with a base frame and retention members that includes a heat-sealing element and removing means to create grooves on the profiled elements, along with lateral containment means using V-shaped elements to trap the sealing bead, ensuring precise sealing without external bead formation, adaptable to various shapes and conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If heating plates with electrical heating elements are used to melt the profiled elements for sealing, then the sealing function is achieved, but excessive sealing beads are formed requiring extensive removal operations
Solution Approach 1:
The patent applies preliminary action by creating containment compartments (milling grooves) on the profiled elements before the sealing operation. These grooves are pre-formed to receive and contain the sealing beads during melting, preventing their formation on external surfaces and eliminating the need for subsequent bead removal operations.
Solution Approach 2:
The patent converts the harmful effect of excess sealing bead formation into a beneficial outcome by designing containment compartments that actively receive and trap the beads. The sealing beads, which would normally be waste material requiring removal, are instead contained within the grooves, transforming from a problem into a controlled feature of the sealing process.
2Manufacturing precision
If containment pressers are used to prevent molten material from coming out, then sealing bead containment is improved on main faces, but lateral faces remain unprotected forming sharp burrs
Solution Approach 1:
The patent applies segmentation by dividing the containment function into two distinct components: containment grooves (milling operations) that create receptacles for sealing beads, and lateral containment means (V-shaped elements) that specifically address lateral face protection. This segmentation allows each component to be optimized for its specific function, with the V-shaped elements specifically designed to prevent burr formation on lateral faces.
Solution Approach 2:
The patent addresses the lateral containment problem by introducing a new dimensional approach with V-shaped elements that extend laterally from the main containment structure. These elements project into the lateral spaces where burrs would form, providing protection in a previously unaddressed spatial dimension.
3Manufacturing precision
If V-shaped lateral containment elements are added to prevent lateral burr formation, then sealing quality on lateral faces is improved, but machine complexity and cost increase
Solution Approach 1:
The patent employs a flexible containment approach by using V-shaped elements made of elastomeric material. This flexibility allows the containment structure to adapt to variations in profiled element dimensions and shapes without requiring complex adjustment mechanisms, thereby maintaining high sealing quality while avoiding excessive mechanical complexity.
Solution Approach 2:
The patent utilizes parameter changes by selecting elastomeric material for the V-shaped containment elements, which can elastically deform to accommodate different profile geometries. This material property change allows a single design to handle multiple profile types, reducing the need for multiple specialized components.
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 machine simplifies the sealing process, eliminates the need for extensive bead removal operations, ensures high-quality seals by containing the sealing bead within defined compartments, and is effective across different extrusion machine outputs and environmental conditions.
Implementation Method 1
heating the portions to be connected by means of suitable plates with electrical heating elements
Implementation Method 2
melting of respective head surfaces in order to achieve a frame structure
Implementation Method 3
pressing the heated portions one against the other to facilitate their melting
Data Source
Figure 1~1a
Figure 2
Figure 3~5
AI summary
The machine (1) for sealing plastic profiled elements comprises: - a base frame (6); - a pair of retention members (7, 8), adapted to retain respective plastic profiled elements (P) having respective areas to seal (Z) with a first main edge (2a), a second main edge (3a), a first lateral edge (4a) and a second lateral edge (5a); - a heat-sealing element with heated plate (11); - sliding means (9, 10) of the retention members (7, 8); - removing means (13, 14) adapted to remove material from the areas to seal (Z) at least at the first lateral edges (4a); - lateral containment means (23, 24), which are adapted to abut on the areas to seal (Z) at the first lateral edges (4a) for the containment of a lateral sealing bead (S) and which comprise at least a V-shaped element (23) having two sides (25) arranged in a V pattern which are adapted to abut on at least a portion of respective first lateral faces (4) of the profiled elements (P).