Injection Molding Machine Frame Vibration Reduction

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Solution Overview

Problem

Injection molding machines experience significant vibration during operation, which existing technologies have not effectively addressed.

Innovation Solution

The injection molding machine incorporates a frame with a beam and a reinforcing member, such as an H-shaped steel vertical beam, to improve rigidity and reduce vibration by supporting the mold clamping and injection units, with the reinforcing member connected via welding or bolts to enhance structural stability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If a conventional frame structure is used to support the mold clamping unit and injection unit, then the device complexity is low and ease of manufacture is high, but the vibration during operation is significant and structural stability is poor

Engineering Contradiction:
Improvestructural stabilityVSAvoidframe structure complexity
Core Design Contradiction:
Stability of the object's compositionVSDevice complexity

Solution Approach 1:

The frame employs composite structural elements combining beams and reinforcing members to create a rigid yet manageable structure. The H-shaped steel vertical beams combined with horizontal beams and diagonal reinforcing members form a composite framework that achieves high structural stability without excessive complexity.

Inventive Principle:
Principle #40Composite materials

Solution Approach 2:

The frame structure transitions from a simple planar arrangement to a three-dimensional spatial framework by incorporating vertical beams, horizontal beams, and diagonal reinforcing members that work together in multiple dimensions to resist vibration and maintain structural integrity.

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

2Object-affected harmful factors

If the frame rigidity is increased to reduce vibration, then the vibration during operation is reduced, but the weight of the frame increases

Engineering Contradiction:
ImprovevibrationVSAvoidframe weight
Core Design Contradiction:
Object-affected harmful factorsVSWeight of stationary object

Solution Approach 1:

The frame is segmented into distinct functional components: vertical H-shaped steel beams for primary support, horizontal beams for connecting platen assemblies, and diagonal reinforcing members for additional rigidity. This segmentation allows each component to be optimized for its specific function while collectively reducing vibration without excessive weight increase.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Reinforcing members are strategically positioned at specific locations where vibration and stress are most problematic, such as diagonal bracing between vertical and horizontal beams. This localized reinforcement approach reduces vibration effectively while minimizing the overall weight increase compared to uniform thickening of the entire frame.

Inventive Principle:
Principle #3Local quality

Data Source

PatentEP3075515B1Injection molding machine
Publication Date: 2018.09.26 SUMITOMO HEAVY IND LTD
  • EP3075515B1 patent drawingFigure 1
  • EP3075515B1 patent drawingFigure 2

AI summary

Provided is an inj ectionmoldingmachine capable of reducing the vibration at the time of the operation of the injection molding machine. An injection molding machine includes a mold clamping unit (10) that performs mold closing, mold clamping, and mold opening of a mold unit (30); an injection unit (40) that fills the interior of the mold unit (30) with a molding material; and a frame (50) that supports at least one of the mold clamping unit (10) and the injection unit (40). The frame (50) has a beam (513) and a reinforcing member (514) joined to the beam (513).