Print Head Cooling Jacket for Wire Manufacturing
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Solution Overview
Problem
Ink-jet print heads used in wire and cable manufacturing are prone to clogging in warm environments, leading to frequent maintenance and production disruptions, as existing cooling methods do not adequately address the heat-related issues, resulting in unreliable print legend application.
Innovation Solution
A print head cooling sleeve that encases the print head, using compressed air to cool the surface and reduce convection and radiation, allowing independent control without obstructing ink flow or connections, thus extending the time between maintenance needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If existing cooling methods (exhaust systems, air pumps, hosing) are used to cool the print head, then some cooling effect is achieved, but the cooling is insufficient and the print head still clogs frequently in warm environments
Solution Approach 1:
The cooling system is segmented into multiple independent cooling channels that wrap around different sections of the print head, allowing targeted cooling of specific hot spots rather than relying on a single general cooling method
Solution Approach 2:
The cooling channels are nested within the print head structure itself, with the cooling jacket integrated into the print head housing, allowing the cooling system to be contained within and protected by the print head assembly
2Temperature
If compressed air is directed at the print head to cool it, then cooling effect is improved, but the air flow is too forceful and disrupts ink dispersion onto the product
Solution Approach 1:
The cooling channels are positioned to deliver cooling air to specific local areas of the print head where heat accumulates, rather than directing high-velocity air across the entire print head surface, thus cooling effectively without disrupting ink dispersion
Solution Approach 2:
The system uses controlled pneumatic flow through integrated cooling channels to achieve precise temperature control, replacing the uncontrolled high-velocity compressed air direction with a regulated pneumatic cooling system
3Reliability
If the print head is cooled more aggressively to prevent clogging, then reliability improves, but the complexity of the cooling system increases
Solution Approach 1:
The cooling channels are merged with the existing print head housing structure, integrating the cooling function into the print head assembly itself rather than adding separate external cooling components, thus reducing overall system complexity
Solution Approach 2:
The print head housing serves multiple functions: it contains the printing mechanism and simultaneously houses the cooling channels, making the structure multi-functional and reducing the need for additional separate cooling 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 solution significantly reduces the frequency of print head clogging and maintenance, ensuring reliable operation by maintaining a cooler temperature and preventing ink dispersion issues, even in high ambient temperatures.
Implementation Method 1
The cooling channels are configured to receive a flow of air that will remove heat from the print head
Implementation Method 2
creating a layer of obstruction to reduce the convection from higher ambient temperatures and radiation from the extrusion line
Data Source
AI summary
An apparatus for cooling a print head implemented on a wire and cable manufacturing line, the apparatus comprising a sleeve, wherein the sleeve has an internal portion and an external portion and wherein the sleeve forms an internal void marginally larger than the size of the print head and wherein the sleeve further comprises an elongated surface; a front surface connected to the elongated surface, wherein the front surface comprises an ink outlet opening; a rear surface connected to the elongated surface, wherein the rear surface comprises a cable opening; a channel connected to the internal portion of the sleeve, wherein the channel comprises an open side facing the internal void and wherein the channel on the internal portion of the sleeve extends from the rear to the front of the sleeve; an air inlet compartment in communication with the channel and enclosed by the rear surface; an air inlet in communication with the air inlet compartment; and an exhaust channel connected to the sleeve and extending from the front surface to the rear surface along the elongated surface and connected to the channel at the front of the sleeve.