Batched Compression Molding of Rubber and Plastic Products
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Solution Overview
Problem
Domestically produced compression molding cap manufacturing equipment faces issues of low production efficiency, poor precision, and stability, failing to meet market demands due to technical monopolies and high costs.
Innovation Solution
A method and device for batched compression molding of rubber and plastic products using multiple mold cavities, employing alternating gear sets for controlled mold operation, isostatic pressing energy storage, and a three-bar linkage mechanism for precise and efficient blank conveyance, enabling fast and stable mold closing and opening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional compression molding equipment is used, then manufacturing cost is reduced, but production efficiency is low and precision is poor
Solution Approach 1:
The mold is divided into multiple cavities (at least two cavities) to enable parallel production of multiple bottle caps in one molding cycle, significantly improving production efficiency while maintaining consistent precision across all cavities through the shared positioning system
Solution Approach 2:
The blank shuttle pre-positions the blank at the correct location before molding begins, and the positioning mechanism pre-establishes the precise spatial relationship between multiple cavities, ensuring high precision is achieved before the actual molding process starts
2Productivity
If traditional compression molding equipment is used, then equipment structure is simple, but production efficiency is low
Solution Approach 1:
The equipment is segmented into modular components including multiple cavities, blank shuttles, and positioning mechanisms, allowing the system to achieve high productivity through parallel processing while keeping each module relatively simple and manageable
Solution Approach 2:
The positioning mechanism serves multiple functions: it positions blanks, aligns cavities, and ensures consistent spacing between multiple molds, reducing the need for separate positioning systems for each cavity and thereby limiting the increase in overall equipment complexity
3Manufacturing precision
If traditional compression molding equipment is used, then equipment cost is low, but precision and stability are poor
Solution Approach 1:
The positioning mechanism is designed to pre-establish precise spatial relationships between multiple cavities and blanks before molding begins, ensuring high precision is achieved through preliminary positioning rather than requiring complex real-time control during molding
Solution Approach 2:
The positioning mechanism uses self-aligning features and fixed geometric relationships that automatically ensure precise positioning without requiring complex active control systems, maintaining simplicity while achieving high precision and stability
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 significantly improves production efficiency, precision, and reduces costs by utilizing energy storage mechanisms and precise mechanical coordination, meeting market demands for bottle cap products while reducing equipment manufacturing complexity.
Implementation Method 1
spring energy storage are implemented by means of the engagement characteristic of the partial gear sets
Implementation Method 2
isostatic pressing energy storage and pressurization of the partial gear sets
Data Source
AI summary
Provided is a method and device for batched compression molding of rubber and plastic products by means of multiple mold cavities, including alternating operation of a blank shuttle and a male mold that is in a bottle cap mold, being controlled by means of engagement of two partial gear sets. Mold opening motion, isostatic pressing energy storage, and spring energy storage are implemented by means of the engagement characteristic of the partial gear sets, and mold closing and compression molding are implemented by means of the non-engagement characteristic, isostatic pressing energy storage, and pressurization of the partial gear sets. The method and device effectively resolve the general problem of low production efficiency and poor precision and stability of existing compression molding cap manufacturing equipment.