Additive Manufacturing Powder Transfer Pipe with Bent Section

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Solution Overview

Problem

In additive manufacturing apparatuses, powder materials agglutinate when suction is stopped, leading to increased mass and difficulty in resuming transfer due to collision impact, especially when using materials like metal powder.

Innovation Solution

A bent section in the transfer pipe is introduced to reduce the falling distance of powder materials, preventing agglutination by stopping their fall in the middle of the transfer section, and a pressurizing part is added to assist in transferring accumulated powder.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the pipe extends in the vertical direction to transfer powder from lower storage to upper feeding part, then the powder material can be transferred by suction, but the powder material falls freely when suction is stopped causing collision and agglutination

Engineering Contradiction:
Improvepowder transfer capabilityVSAvoidpowder transfer resumption
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The pipe is divided into multiple sections with bent parts creating distinct zones: a first vertical section for suction transfer, a horizontal section as a transition zone with bent part to stop falling powder, and a second vertical section for continued transfer. This segmentation prevents agglutination by stopping powder fall at the bent part while maintaining transfer capability in other sections.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The bent part acts as an intermediary element that interrupts the vertical fall path of powder particles. By introducing this intermediate horizontal section, the powder's gravitational fall is stopped before reaching the lower end, preventing the harmful collision and agglutination effect while still allowing suction-driven transfer to function.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Ease of operation

If the powder storage part is arranged on the vertically lower side to enable suction transfer, then transfer is possible, but the apparatus occupies more horizontal space

Engineering Contradiction:
Improvepowder transfer mechanismVSAvoidhorizontal space occupation
Core Design Contradiction:
Ease of operationVSArea of stationary object

Solution Approach 1:

The pipe configuration transitions from a purely vertical arrangement to a three-dimensional path incorporating horizontal sections. The bent parts create a spatial arrangement where the pipe extends in multiple directions (vertical and horizontal), allowing the system to maintain vertical height advantage while reducing horizontal footprint through compact folding of the transfer path.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The bent parts in the pipe introduce curved or angled transitions instead of sharp right angles, creating a more compact three-dimensional configuration. This curvature allows the pipe to fold back on itself more efficiently in space, reducing the overall horizontal envelope while maintaining the necessary vertical elevation difference for suction transfer.

Inventive Principle:
Principle #14Spheroidality (Curvature)

3Productivity

If the pipe is made vertical for efficient suction transfer, then transfer efficiency is improved, but powder material collides with great impact when falling from high position

Engineering Contradiction:
Improvepowder transfer efficiencyVSAvoidcollision impact
Core Design Contradiction:
ProductivityVSObject-affected harmful factors

Solution Approach 1:

The bent part is positioned beforehand in the pipe to create a stopping point for falling powder. This预先 placed structural feature cushions the powder's gravitational fall by intercepting it before it can accelerate to high velocity and cause harmful collisions, while still allowing the suction mechanism to efficiently transfer powder through the vertical sections.

Inventive Principle:
Principle #11Beforehand cushioning (Prior cushioning)

Solution Approach 2:

The bent part converts the harmful effect of gravitational fall into a beneficial flow control mechanism. By strategically placing the bend, the system uses gravity to feed powder into the horizontal section where it accumulates or flows controllably, then allows suction to pick it up and transfer it vertically without the harmful high-velocity collision that would occur in a purely vertical configuration.

Inventive Principle:
Principle #22Blessing in disguise (Convert harm into benefit)

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 effectively prevents powder material agglutination and facilitates easy resumption of transfer when suction is resumed, while also reducing the apparatus's size by minimizing horizontal space occupation.

Implementation Method 1

the powder material is transferred from the powder storage part to the powder feeding part as the powder material is sucked from the powder feeding part side

Methodology Applied
Scientific EffectSuction: Suction

Implementation Method 2

when the suction of the powder material is stopped, the powder material inside the pipe that extends in the vertical direction falls freely

Methodology Applied
Scientific EffectGravity: Gravitation

Implementation Method 3

an impact of collision between the powder materials becomes great, and the powder materials agglutinate with each other

Methodology Applied
Scientific EffectImpact Force: Impact Force

Data Source

PatentUS10173263B2Additive manufacturing apparatus
Publication Date: 2019.01.08 TOYOTA JIDOSHA KK
  • US10173263B2 patent drawing
  • US10173263B2 patent drawing
  • US10173263B2 patent drawing

AI summary

An additive manufacturing apparatus includes a shaping part, a powder feeding part that feeds the powder material to the shaping part, a powder storage part that stores the powder material, and a pipe through which the powder material is transferred from the powder storage part to the powder feeding part. The powder storage part is arranged on a lower side of the powder feeding part in the vertical direction. The pipe is provided with a bent part in a transfer section in which the powder material is transferred from a lower side to an upper side in the vertical direction. The bent part stops the falling of the powder material that is present in the transfer section in the middle of the transfer section when the suction is stopped.