3D Printing Shaping Stage Thermal Relief Structure

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Solution Overview

Problem

Existing three-dimensional shaping apparatuses require complex mechanical mechanisms for separating shaped articles from the shaping stage, leading to increased size and complexity.

Innovation Solution

A shaping stage with a first member having recess or penetration portions and a second member with a different thermal expansion coefficient, allowing temperature-controlled relief structure changes to facilitate article separation by inverting projections and recesses.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a mechanical mechanism is provided for separating the shaped article from the shaping stage, then the separation function is achieved, but the device complexity and size increase

Engineering Contradiction:
Improveseparation of shaped articleVSAvoidconfiguration complexity
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The patent replaces the mechanical mechanism for separation with a thermal field-based solution. By controlling the temperature of the shaping stage, the relief structure changes its shape due to thermal expansion/contraction, enabling automatic separation of the shaped article without any mechanical actuators or moving parts. This substitutes a mechanical system with a thermal control system.

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

Solution Approach 2:

The patent changes the temperature parameter of the shaping stage to control the shape of the relief structure. When the temperature changes, the relief structure expands or contracts thermally, transforming from a projected state (for shaping) to a retracted state (for separation), or vice versa. This parameter change enables the separation function without mechanical complexity.

Inventive Principle:
Principle #35Parameter changes

2Stability of the object's composition

If the relief structure is fixed, then the shaping function is stable, but the separation function cannot be achieved

Engineering Contradiction:
Improverelief structure stabilityVSAvoidseparation of shaped article
Core Design Contradiction:
Stability of the object's compositionVSEase of operation

Solution Approach 1:

The patent makes the relief structure dynamic by enabling it to change shape in response to temperature variations. The relief structure is not permanently fixed but can dynamically transition between different shapes (projected and retracted) based on thermal conditions. This dynamic behavior allows the structure to maintain stability during shaping while enabling separation when temperature changes.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The patent utilizes thermal expansion/contraction of the relief structure to achieve shape changes. When the shaping stage temperature changes, the relief structure expands or contracts, causing it to project from or retract into the shaping face. This thermal response enables the relief structure to switch between stable shaping configuration and separation configuration without mechanical actuation.

Inventive Principle:
Principle #37Thermal expansion

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 simple and efficient separation of shaped articles from the shaping stage with enhanced fixing properties during shaping, reducing apparatus complexity.

Implementation Method 1

a second member that is placed in internal spaces of the recess portions or the penetration portions, that has a second shaping face portion included in the shaping face, and that has a thermal expansion coefficient different from the first member

Methodology Applied
Scientific EffectThermal expansion: Thermal Expansion

Data Source

PatentUS11370167B2Shaping stage, three-dimensional shaping apparatus, and control method of three-dimensional shaping apparatus
Publication Date: 2022.06.28 SEIKO EPSON CORP
  • US11370167B2 patent drawing
  • US11370167B2 patent drawing
  • US11370167B2 patent drawing

AI summary

A shaping stage has a shaping face where a shaping material is deposited and is used in a three-dimensional shaping apparatus by being subjected to temperature control. The shaping stage includes a first member having a plurality of recess portions or penetration portions and a first shaping face portion that is present in peripheries of the recess portions or the penetration portions and that is included in the shaping face, and a second member that is placed inside the recess portions or the penetration portions, that has a second shaping face portion included in the shaping face, and that has a thermal expansion coefficient different from the first member.