Liquid Transfer Device for Tactile Coating
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Solution Overview
Problem
Conventional liquid transfer devices are limited in applying thick, tactile coatings due to their inability to handle liquids of high viscosity, which restricts their application in creating adequate tactile sensations on substrates.
Innovation Solution
A liquid transfer device that employs a combination of first and second liquid transfer means to form tactile raised parts on a substrate, where the first liquid is spot-coated using a rotary screen cylinder and the second liquid covers the raised parts while maintaining their shape, ensuring an adequately tactile coating without the raised parts dropping off.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a thick layer of coating liquid is applied by spot coating to create tactile sensation, then the tactile effect is improved, but the coating liquid requires high viscosity which conventional devices cannot handle
Solution Approach 1:
The liquid transfer device is divided into multiple independent liquid transfer means (first liquid transfer means and second liquid transfer means), each capable of independently transferring liquid to the substrate. This segmentation allows each unit to handle specific viscosity requirements, with the first means applying thick high-viscosity liquid for tactile effect and the second means applying additional coating to maintain the raised structure.
2Manufacturing precision
If conventional liquid transfer devices are used, then the device complexity is low, but they cannot apply thick tactile coatings due to low viscosity liquid limitations
Solution Approach 1:
Multiple liquid transfer means are combined in sequence within a single device, where the first liquid transfer means applies the initial thick coating and the second liquid transfer means applies additional coating. This merging of functions allows the device to achieve tactile coating capabilities while maintaining a relatively simple overall structure compared to using multiple separate devices.
3Manufacturing precision
If a thick layer of liquid is applied to form raised parts, then the tactile effect is enhanced, but the raised parts may drop off from the substrate
Solution Approach 1:
The first liquid transfer means applies the thick coating liquid to form raised parts on the substrate first. Then, the second liquid transfer means applies a second coating liquid that serves to seal and secure the raised parts, preventing them from dropping off. This preliminary formation followed by sealing approach ensures both tactile effect and structural stability.
Solution Approach 2:
The device uses two different liquids with different properties: the first liquid forms the raised tactile structure, while the second liquid provides sealing and adhesion. This composite approach, where two different materials work together in sequence, ensures that the raised parts maintain both their tactile prominence and their attachment to the substrate.
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 the easy application of tactile coatings with a thick layer, expanding the application range and preventing the raised parts from detaching, thus enhancing both visual and tactile effects for substrates like sheets or webs.
Implementation Method 1
a rotary screen cylinder that transfers the first liquid to one side of a substrate to form a tactile raised part on the one side of the substrate
Implementation Method 2
a rotary screen cylinder that transfers the first liquid to one side of a substrate to form a tactile raised part
Implementation Method 3
a second liquid transfer means that transfers the second liquid to the one side of the substrate to form a coating part that covers the raised part while maintaining a shape of the raised part
Data Source
Figure 1
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AI summary
A coater (100), which is capable of spot coating a layer thick enough to be palpable onto a transfer object, is provided with a first coating unit (120) and a second coating unit (130). The first coating unit (120) is provided with a first impression cylinder (121) and a rotary screen cylinder (122) for transferring a first varnish on one surface of a sheet (1). The second coating unit (130) is provided with a second impression cylinder (131) and a cylinder (132) for transferring a second varnish on the first varnish that has been transferred onto the one surface of the sheet. Palpable protrusions formed by transfer of the first varnish in the first coating unit (120) are covered by the second varnish in the second coating unit (130) while maintaining the shapes thereof.