Variable Displacement Hydraulic Pump for Multi-Mold Clamping
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing injection molding apparatus with multiple mold clamping mechanisms require large and costly hydraulic pumps due to simultaneous operation, leading to increased electricity costs and inefficiencies, even when not all mechanisms are in use.
Innovation Solution
An injection molding apparatus with a single hydraulic pressure supply source and a hydraulic-pressure-supply-destination selection section that allows hydraulic pressure to be selectively supplied to individual mold clamping mechanisms, combined with electric or compressed air power for injecting machines, reducing the necessary capacity and size of the hydraulic pump and lowering electricity costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single hydraulic pump is used to drive multiple mold clamping mechanisms, then the device complexity is reduced, but the hydraulic pump capacity must be large enough to handle simultaneous operation of all mechanisms
Solution Approach 1:
The patent applies dynamics by making the hydraulic pump capacity adjustable through variable displacement design. The pump can change its displacement volume based on operational requirements, allowing it to provide large capacity when multiple mechanisms need simultaneous drive, and reduced capacity when fewer mechanisms are active, thus optimizing both device complexity and power requirements.
Solution Approach 2:
The patent changes the parameter of hydraulic pump displacement from fixed to variable. By enabling the pump displacement to be dynamically adjusted according to the number and requirements of active mold clamping mechanisms, the system can use a single pump with variable capacity instead of multiple fixed-capacity pumps, resolving the contradiction between device complexity and power requirements.
2Reliability
If a large hydraulic pump is used to drive all mold clamping mechanisms simultaneously, then all mechanisms can be driven at full capacity, but electricity cost increases significantly
Solution Approach 1:
The patent applies dynamics by making the hydraulic pump capacity adjustable through variable displacement design. The pump can change its displacement volume based on operational requirements, allowing it to provide large capacity when multiple mechanisms need simultaneous drive, and reduced capacity when fewer mechanisms are active, thus optimizing both device complexity and power requirements.
Solution Approach 2:
The patent applies periodic action by enabling the hydraulic pump to operate in intermittent cycles, providing full capacity only when multiple mechanisms require simultaneous drive, and reducing or stopping operation when fewer mechanisms are active. This periodic variation in pump operation based on actual demand significantly reduces overall energy consumption and electricity costs while maintaining the ability to handle peak simultaneous operation requirements.
3Use of energy by moving object
If a single hydraulic pump with variable capacity is used, then electricity cost is reduced, but the control complexity increases
Solution Approach 1:
The patent applies feedback by implementing a control system that monitors the operational status of mold clamping mechanisms and automatically adjusts the hydraulic pump's displacement and operation accordingly. This feedback-based control enables the pump to provide appropriate capacity based on actual demand, reducing energy consumption while managing control complexity through automated response to system conditions.
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 reduces the capacity and size of the hydraulic pressure supply source, lowers electricity costs, and enables more precise control and energy conservation, while allowing for efficient handling of different resin materials with varying cooling times, facilitating double-color molding.
Implementation Method 1
a single hydraulic pressure supply source provided for supplying mold clamping hydraulic pressure to the plurality of mold clamping mechanisms
Implementation Method 2
a turntable for shifting injection molds, disposed thereon, between the mold clamping mechanisms
Data Source
AI summary
An injection molding apparatus has at least two mold clamping mechanisms for clamping respective molds. A hydraulic pressure supply source supplies hydraulic pressure to the at least two mold clamping mechanisms to clamp the respective molds. A a hydraulic-pressure-supply-destination selection section is configured to allow hydraulic pressure from the hydraulic pressure supply source to be selectively supplied to any one of the two mold clamping mechanisms. At least two injecting machines are configured to inject resin material to the respective molds clamped by the respective two mold clamping mechanisms. A non-hydraulic power supply source drives the at least two injecting machines to inject the resin material.