Wire-Ball 3D Shaping for Low-Waste Conductive Part Production

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Solution Overview

Problem

Current methods for producing three-dimensional shaped objects using conductive materials are inefficient due to material waste, high production time, and high costs associated with using expensive conductive powders and laser devices, which also face challenges with shape deformation and material handling.

Innovation Solution

A three-dimensional shaped object production device that forms balls at the end of a conductive wire using high voltage and aligns them by positioning and bonding, using ultrasonic waves, pressure, and heating to stack the balls into a desired shape without requiring expensive powder materials or laser devices.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If cutting work or press work is used to produce three-dimensional shaped objects, then the objects can be produced with precise shapes, but large-sized apparatus are required and the operation requires skilled dedicated operators

Engineering Contradiction:
Improveshape precisionVSAvoidapparatus size and operation complexity
Core Design Contradiction:
Manufacturing precisionVSDevice complexity

Solution Approach 1:

The patent replaces complex mechanical cutting and pressing systems with a simple wire-based additive manufacturing system. Instead of using large cutting tools or press machines, the invention uses a wire that is fed through a capillary and melted by a simple heating element to deposit material layer by layer, constructing three-dimensional objects through accumulation rather than subtraction or forming.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent segments the manufacturing process into discrete layers and discrete wire feed operations. The wire is fed in small increments through the capillary, with each segment of wire forming a portion of the object cross-section. This segmentation allows complex shapes to be built from simple repetitive operations without requiring complex apparatus.

Inventive Principle:
Principle #1Segmentation

2Manufacturing precision

If material is removed from a material block by cutting work to produce three-dimensional shaped objects, then precise shapes can be obtained, but material waste occurs and production time increases

Engineering Contradiction:
Improveshape accuracyVSAvoidmaterial waste
Core Design Contradiction:
Manufacturing precisionVSLoss of substance

Solution Approach 1:

The patent inverts the traditional subtractive manufacturing approach and uses additive manufacturing instead. Rather than removing material from a block to create the desired shape, the wire is melted and deposited to build the object directly in its final shape. This inversion eliminates material waste entirely, as only the material needed for the final object is consumed.

Inventive Principle:
Principle #13The other way round (Inversion)

Solution Approach 2:

The patent changes the fundamental manufacturing parameter from material removal to material deposition. By controlling the wire feed rate, heating temperature, and deposition speed, the system directly creates the desired shape through controlled material accumulation, achieving both shape accuracy and material efficiency.

Inventive Principle:
Principle #35Parameter changes

3Adaptability or versatility

If a laser beam is used to selectively sinter powder to produce three-dimensional parts, then complex shapes can be produced layer by layer, but expensive powder materials and laser devices are required and production time is long

Engineering Contradiction:
Improvecomplex shape capabilityVSAvoidequipment cost and production time
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent replaces expensive laser devices with a simple, low-cost heating element that melts the wire material. The heating element is a basic resistive heater that can be easily replaced if needed, unlike expensive laser systems. This substitution dramatically reduces equipment cost while maintaining the ability to produce complex three-dimensional shapes through layer-by-layer construction.

Inventive Principle:
Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The patent uses a wire as a continuous material source that is melted and deposited to create the object, rather than using loose powder that must be selectively sintered. The wire form factor simplifies material handling and eliminates the need for powder spreading and removal operations, reducing both equipment complexity and production time while maintaining design flexibility.

Inventive Principle:
Principle #26Copying

4Manufacturing precision

If materials that can be softened and melted at high temperature are used to reduce shape deformation, then less deformation occurs, but the materials are difficult to handle and not practical for production

Engineering Contradiction:
Improveshape stabilityVSAvoidmaterial handling difficulty
Core Design Contradiction:
Manufacturing precisionVSEase of operation

Solution Approach 1:

The patent employs a wire feeding system with a capillary that can accommodate various wire diameters and material types. The same basic apparatus can handle different materials by simply changing the wire feed rate and heating parameters, making the system universally applicable to both low-temperature and high-temperature materials without requiring complex handling mechanisms.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent replaces complex powder handling and laser control systems with a simple wire feeding and melting system. The wire is fed through the capillary by simple mechanical feeders, and the melting is achieved through resistive heating rather than laser irradiation. This substitution makes high-temperature materials much easier to handle while reducing equipment complexity.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

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 method reduces material costs, allows for flexible handling of high-temperature materials, and produces objects with reduced weight and deformation, enabling efficient and cost-effective production of complex shapes without the need for expensive equipment.

Implementation Method 1

ball forming means for forming a ball at a leading end of a conductive wire, which is inserted into a capillary and is paid out from a leading end of the capillary, by applying high voltage between the leading end of the conductive wire and a spark rod

Methodology Applied
Scientific EffectElectric Arc: Electric Arc

Implementation Method 2

bonding means for bonding the ball formed at the leading end of the capillary to at least one of the plate or another ball that has already been stacked on the plate

Methodology Applied
Scientific EffectElectric Arc: Electric Arc

Data Source

PatentUS11148355B2Three-dimensional shaped object production device and three-dimensional shaped object production method
Publication Date: 2021.10.19 KAIJOO KK
  • US11148355B2 patent drawing
  • US11148355B2 patent drawing
  • US11148355B2 patent drawing

AI summary

Provided are a three-dimensional shaped object production device and method capable of producing a predetermined three-dimensional shaped object by forming a ball at a leading end of a conductive wire through use of the conductive wire based on scanned data or designed data and aligning and stacking the balls. The three-dimensional shaped object production device includes: a plate (40), on which a three-dimensional shaped object is placeable; a ball forming section configured to form a ball (13) by applying high voltage between a leading end of a conductive wire (4) paid out from a leading end of a capillary (12) and a spark rod (19) and melting the leading end of the wire by discharge energy; a positioning device configured to position the plate and the ball forming section by moving the plate and the ball forming section relative to each other; and a bonding section configured to bond the ball formed at the leading end of the capillary to another ball (14) that has already been stacked on the plate, the forming of the ball by the ball forming section, the relative moving of the plate and the ball forming section by the positioning device, and the bonding of the ball formed at the leading end of the capillary to the another ball by the bonding section is repeated, to thereby produce a three-dimensional shaped object having a desired shape.