Injection Molding Ejector Belt Layout for Compact Sound-Proof Covers
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Solution Overview
Problem
The existing sound-proof covers for injection molding machines are either excessively large, leading to poor handling performance, or inadequately configured, resulting in reduced sound-proof performance when installed to cover only contact areas between parts.
Innovation Solution
Incorporating an idler pulley that winds the transmission belt, reducing the area surrounded by the belt and allowing the sound-proof cover to cover the driving pulley, driven pulleys, and idler pulley, thereby minimizing size while maintaining excellent sound-proof performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the sound-proof cover is designed to cover the entire transmission area including driving pulley, driven pulleys, and transmission belt, then sound-proof performance is improved, but the size of the cover increases significantly leading to poor handling performance
Solution Approach 1:
The sound-proof cover is divided into multiple detachable sections: a first cover portion covering the driving pulley, a second cover portion covering the driven pulleys, and a third cover portion covering the transmission belt. These sections can be separately assembled and disassembled, improving handling performance while maintaining comprehensive sound-proof coverage when assembled together.
Solution Approach 2:
The transmission belt is routed to pass over and under the pulleys in a three-dimensional path rather than a simple planar arrangement. This spatial routing reduces the horizontal footprint of the transmission system, allowing a more compact sound-proof cover design that is easier to handle while still enclosing all noise-generating components.
2Ease of operation
If the sound-proof cover is designed to cover only contact areas between parts, then handling performance is improved, but sound-proof performance is reduced due to exposed transmission areas
Solution Approach 1:
The sound-proof cover is divided into multiple detachable sections: a first cover portion covering the driving pulley, a second cover portion covering the driven pulleys, and a third cover portion covering the transmission belt. These sections can be separately assembled and disassembled, improving handling performance while maintaining comprehensive sound-proof coverage when assembled together.
Solution Approach 2:
The multiple cover portions are designed to be assembled together to form a complete enclosure around all transmission components. When assembled, the first, second, and third cover portions merge to provide comprehensive sound-proof coverage of the entire transmission system, eliminating exposed areas while maintaining ease of handling through modular assembly.
3Reliability
If the transmission belt is routed in a large area path between driving and driven pulleys, then the pulleys can be adequately engaged, but the sound-proof cover size increases
Solution Approach 1:
The transmission belt is routed to pass over and under the pulleys in a three-dimensional path rather than a simple planar arrangement. This spatial routing reduces the horizontal footprint of the transmission system, allowing a more compact sound-proof cover design that is easier to handle while still enclosing all noise-generating components.
Solution Approach 2:
The transmission belt is configured to loop through the pulley assembly in a compact configuration where the belt path is nested within the space occupied by the pulleys themselves. This nesting of the belt path within the pulley footprint minimizes the overall transmission area, allowing for a smaller sound-proof cover while maintaining adequate meshing engagement.
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 configuration improves handling performance of the sound-proof cover while ensuring effective sound-proofing by reducing the size of the cover and enhancing the meshing engagement of the transmission belt, thus efficiently transmitting driving force.
Implementation Method 1
an endless transmission belt 28 wound on the driving pulley 27 and the driven pulleys 24 and 25
Implementation Method 2
an endless transmission belt 28 wound on the driving pulley 27 and the driven pulleys 24 and 25
Implementation Method 3
a plurality of ball screws 23 each having one end rotatably supported on the moving platen 1 and the other end rotatably supported on the guide rod plate 21, and rotating clockwise and counterclockwise around the axis to make the ejector plate 22 advance and retreat
Implementation Method 4
the ejector mechanism 100 is generally provided with a sound-proof cover 29 for covering the parts such as the driving pulley 27, the driven pulleys 24 and 25, the transmission belt 28, etc. and for reducing noise
Data Source
AI summary
To provide an ejector mechanism of an injection molding machine that improves handling performance of a sound-proof cover while ensuring excellent sound-proof performance. An ejector mechanism of an injection molding machine comprises: a plurality of ball screws that rotates clockwise and counterclockwise about an axis to make an ejector plate and an ejector pin advance and retreat together; a plurality of driven pulleys and each connected to a corresponding one of the ball screws; a driving pulley that rotates clockwise and counterclockwise in response to the driving of a driving motor; an endless transmission belt wound on the driving pulley and the driven pulleys; an idler pulley on which the transmission belt is wound in such a manner as to define a small area of a region surrounded by the endless transmission belt wound on the driving pulley and the driven pulleys; and a sound-proof cover provided to cover the driving pulley, the driven pulleys, the idler pulley, and the transmission belt.