Variable Cavity Injection Molding Apparatus
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Solution Overview
Problem
Existing injection molding apparatuses require multiple molds to be manufactured for different product thicknesses, leading to wasted manpower and delayed production due to the inability to adjust cavity sizes and replace molds efficiently.
Innovation Solution
An injection molding apparatus with a variable cavity system, where a movable block adjusts the size of the cavity by ascending and descending, allowing for the injection of melted resin and efficient ejection of the solidified product, and an adjustable internal mold for varying product shapes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the mold and cavity are formed integrally with each other, then the structure is simple and easy to manufacture, but the cavity size cannot be adjusted and multiple molds must be manufactured for different product thicknesses
Solution Approach 1:
The mold is divided into a fixed block and a movable block that can be adjusted independently. The movable block can be positioned at different heights to change the cavity size, allowing a single mold to accommodate multiple product thicknesses without manufacturing multiple separate molds.
Solution Approach 2:
The movable block can be adjusted dynamically during the molding process to change the cavity size. This dynamic adjustment capability allows the same mold to be adapted for different product thicknesses by simply moving the block to the desired position before injection.
2Adaptability or versatility
If the mold is replaced to change product thickness, then the cavity size can be adjusted, but manpower is wasted and production is delayed
Solution Approach 1:
Instead of replacing the entire mold when product thickness changes, the movable block within the mold can be adjusted to the appropriate height. This dynamic adjustment eliminates the need for mold replacement, saving manpower and time while maintaining production continuity.
Solution Approach 2:
The movable block can be pre-positioned at the required height before the injection molding process begins. This preliminary adjustment ensures that the correct cavity size is ready in advance, eliminating delays associated with mold replacement during production.
3Manufacturing precision
If multiple molds are manufactured for different product thicknesses, then the correct cavity size can be achieved, but manufacturing costs increase and resources are wasted
Solution Approach 1:
The mold is segmented into adjustable components where the movable block can be repositioned to create different cavity sizes. This segmentation allows a single mold design to serve multiple product thickness requirements, eliminating the need to manufacture multiple specialized molds and reducing overall manufacturing costs.
Solution Approach 2:
The movable block mechanism provides multi-functionality to a single mold, enabling it to accommodate various product thicknesses. This universal design allows one mold to perform multiple functions that would otherwise require separate specialized molds, reducing manufacturing costs and resource waste.
Data Source
AI summary
Provided is an injection molding apparatus including: an upper mold; a lower mold; a receive block; a fixed block; a movable block; a variable cavity; a movable block adjusting unit; and an ejector pipe.