Hand Welding Extruder With Pivotable Tacking Nozzle
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Solution Overview
Problem
Conventional manual welding extruders require separate devices for tacking and extrusion welding, necessitating the use of two distinct machines in many applications, which increases complexity and reduces portability.
Innovation Solution
A hand-held welding extruder with a pivotably attached tacking nozzle integrated into the hot-air unit, allowing the device to perform both tacking and extrusion welding by pivoting the nozzle between working and rest positions, enabling single-device operation for both processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate devices are used for tacking and extrusion welding, then each device can be optimized for its specific function, but the overall system complexity increases and portability decreases
Solution Approach 1:
The patent combines the tacking nozzle and extrusion welding nozzle into a single handheld device housing. The tacking nozzle is integrated into the hot-air unit, while the extrusion welding nozzle is part of the extruder unit. Both nozzles can be positioned and used independently within the same device, allowing users to perform both tacking and extrusion welding operations with one tool rather than requiring separate devices.
Solution Approach 2:
The handheld device is designed to perform multiple welding functions through a single integrated system. The device can switch between tacking operations (using the tacking nozzle with hot air) and extrusion welding operations (using the extruder screw to deliver molten material through the extrusion welding nozzle). This multi-functional capability eliminates the need for multiple specialized devices while maintaining optimization for each specific welding process.
2Adaptability or versatility
If a tacking nozzle is added to the handheld welding extruder, then the device can perform both tacking and extrusion welding, but the device weight and size increase
Solution Approach 1:
The tacking nozzle is nested within or integrated into the existing hot-air unit housing of the extruder. The extrusion welding nozzle is positioned within the extruder unit housing. Both nozzles share the common housing structure and utilize existing support systems, such as the housing walls and mounting mechanisms already present in the device. This nesting approach minimizes additional material requirements and keeps the overall device footprint compact.
3Ease of operation
If the tacking nozzle is made pivotable, then the nozzle can be positioned optimally for different operations, but the device complexity increases
Solution Approach 1:
The tacking nozzle is designed with pivotability to allow dynamic repositioning between different operational modes. The nozzle can be rotated or adjusted to optimal angles for both tacking and extrusion welding operations. This dynamic positioning capability enables the nozzle to adapt to different work requirements without requiring completely separate fixed-position nozzles, simplifying the overall device architecture while maintaining operational flexibility.
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 efficient one-device operation for both tacking and extrusion welding, reducing the need for multiple machines and enhancing portability and ease of use by allowing the tacking nozzle to be easily switched between positions or removed, maintaining the device's compact design and thermal separation for precise temperature control.
Implementation Method 1
the tacking nozzle (15) heated by hot air emerging from the hot-air nozzle (23)
Implementation Method 2
Hot gas welding equipment with a so-called tacking nozzle is used for this. When tacking, a narrow jet of hot air emerges from the underside of the nozzle
Implementation Method 3
The extruder screw pushes the granulate into the melting chamber, where it is melted
Implementation Method 4
a coil heater, which plasticizes the inserted plastic wire
Implementation Method 5
The parts to be joined are heated to the welding temperature using a hot air nozzle attached to the manual welding extruder. A welding shoe, which can be fastened to the front end area of the nozzle tube of the extruder nozzle, is used to apply the melted material to the parts to be joined to form the weld seam
Data Source
Figure 1
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AI summary
The invention relates to a hand welding extruder comprising an extruder unit (10) provided with an extruder screw, a drive unit comprising a motor and a transmission for driving the extruder screw, a hot air unit (11) comprising a hot air nozzle (23), an outer housing, and at least one handle or a grip device, for holding the hand welding extruder with one hand or two hands. According to the invention, a tacking nozzle (15) is pivotably applied or can be removably fixed to the hand welding extruder in the region of the hot air unit (11) for pre-heating during the extrudate welding. As a result, the hand welding extruder can be used both for tacking the workpieces to be connected and for extrudate welding, such that only one appliance is required for the two operations. For the tacking, the tacking nozzle (15) is brought into its working position wherein it is exposed to the hot air from the hot air housing. If the appliance is then to be used for extrudate welding, the tacking nozzle is either pivoted into an idle position or removed from the appliance.