Grooved PVC Welding Plate for Bead Containment
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Solution Overview
Problem
Current methods for welding PVC profiled elements, such as window and door frames, result in non-uniform welding zones, excessive material melting, and the formation of a prominent welding bead, leading to waste, increased processing time, and the need for cumbersome and expensive finishing equipment.
Innovation Solution
A method involving the creation of grooves in the welding zones to contain the welding bead, eliminating the need for bead removal operations, and using a device with heating and milling tools to ensure precise alignment and melting, with recesses and protrusions on the welding plate enhancing adhesion and mechanical strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional heating and pressing method is used to weld PVC profiled elements, then the welding zone achieves melting and joining, but excessive material melts forming an abundant bead that requires removal
Solution Approach 1:
The welding plate is segmented with multiple recesses (grooves) that divide the welding zone into controlled sections. Each recess captures excess melted material locally, preventing it from forming a continuous abundant bead that would require removal. This segmentation allows controlled melting while containing the excess material.
Solution Approach 2:
The recesses in the welding plate act as intermediary structures between the heating element and the profiled elements. These recesses intercept and contain the excess melted material before it can form a problematic bead on the visible surface, serving as a mediator that captures the harmful excess material.
2Productivity
If traditional welding method is used, then profiled elements are joined, but substantial time is required for subsequent bead removal and cleaning operations
Solution Approach 1:
The recesses are pre-formed in the welding plate before the welding operation begins. This preliminary preparation of the welding surface ensures that during the welding process, excess material is automatically directed into and contained by the recesses, eliminating the need for subsequent bead removal operations and saving substantial time.
Solution Approach 2:
The excess melted material, which traditionally forms a harmful bead requiring removal, is converted into a beneficial element by directing it into the recesses where it becomes contained and integrated into the joint structure. This transforms the harmful excess material into part of the welding process that eliminates finishing operations.
3Ease of manufacture
If traditional welding equipment is used, then profiled elements can be welded, but cumbersome and expensive finishing machinery is required for bead removal
Solution Approach 1:
The welding plate integrates multiple functions into a single component: heating, pressing, and bead containment. The recesses are built into the welding plate itself, combining the finishing function directly with the welding operation, thereby eliminating the need for separate cumbersome finishing machinery.
Solution Approach 2:
The welding plate with its integrated recesses performs the bead containment function automatically during the welding process itself. The system is self-sufficient, requiring no external finishing equipment, as the welding plate structure itself provides the bead management capability.
4Stability of the object's composition
If uniform heating is applied to PVC profiled elements, then the entire surface melts, but this creates non-uniform welding zones and excessive bead formation
Solution Approach 1:
The welding plate provides localized heating through its recessed structure. Different areas of the welding plate have different thermal characteristics - the recesses concentrate heat where needed while allowing excess material to be contained. This local differentiation of heating quality creates uniform welding zones without excessive bead formation.
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 reduces material waste, simplifies the welding process, eliminates the need for additional finishing operations, and increases the mechanical strength of the welded joints by maintaining the welding bead within the grooves, resulting in a more efficient and aesthetically pleasing outcome.
Implementation Method 1
the melting is done by heating the portions to be connected using suitable electric heating plates
Implementation Method 2
heating the portions to be connected using suitable electric heating plates and then pressing the heated portions the one against the other to favor melting
Implementation Method 3
a groove is made in correspondence to at least one zone to be welded (4) of the profiled elements (3) by means of a removal operation (milling, melting, chamfering, etc.)
Data Source
Figure 1a
Figure 1b
Figure 2a~2b
AI summary
The method for welding profiled elements in plastic material, in particular PVC, comprises the steps of: - preparing two profiled elements (3; 3a, 3b; 60, 61), arranged with respective zones to be welded (4; 62, 63) facing one another; - making a groove (19) in correspondence to at least one zone to be welded (4; 62, 63) of the profiled elements (3; 3a, 3b; 60, 61), the step of making the groove (19) being performed by means of a removal operation on a peripheral edge of at least one profiled element (3; 3a, 3b; 60, 61); - heating the zones to be welded (4; 62, 63); - coupling the zones to be welded (4; 62, 63) to one another, pressing the profiled elements (3; 3a, 3b; 60, 61) one against the other so as to keep the zones to be welded (4; 62, 63) in reciprocal contact; - the step of coupling the zones to be welded (4; 62, 63) comprising: - a sub-step of melting the zones to be welded (4; 62, 63) into one another in order to define a welding bead; - a sub-step of making a containing compartment (19a) defined by the groove (19), the welding bead being made internally of the containing compartment (19a); and - the step of arranging a containing presser (27) in correspondence to the containing compartment (19a) for preventing exit of the welding bead from the compartment itself.