Cold Extrusion Press Heating for Stable Tool Temperature
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Solution Overview
Problem
Cold extrusion presses face challenges in maintaining dimensional accuracy due to temperature fluctuations, leading to significant process waste and operational inefficiencies, as existing temperature control devices are inadequate and pose safety risks.
Innovation Solution
A temperature control system for cold extrusion presses featuring integrated die and stamp heaters with temperature sensors and a control unit, allowing for precise and automatic temperature management, ensuring consistent tool temperatures during operation and rapid recovery after downtime.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If manual die heaters are used to maintain tool temperature, then temperature control is attempted, but the device complexity increases and safety risks arise due to manual handling requirements
Solution Approach 1:
The heating elements are integrated directly into the die holder and press ram structures, merging the heating function with the existing tooling components. This eliminates separate manual heating devices and reduces overall system complexity while maintaining temperature control capability
Solution Approach 2:
The system incorporates temperature sensors and control units that automatically monitor and adjust heating element operation. This self-regulating mechanism eliminates the need for manual intervention, reduces safety risks, and maintains consistent tool temperatures without operator involvement
2Temperature
If external heating plates or heat packs are manually attached to the die, then heating capability is provided, but the ease of operation deteriorates due to manual assembly and disassembly requirements
Solution Approach 1:
Heating elements are built into the die holder and press ram as integrated components rather than external attachments. This eliminates the need for manual assembly and disassembly of heating devices, significantly improving ease of operation while maintaining effective heating capability
Solution Approach 2:
The heating elements are pre-installed and positioned within the tooling structures before production begins. This preliminary integration eliminates the need for operators to attach heating devices during setup or restart phases, reducing complexity and improving operational simplicity
3Temperature
If gas burners with open flames are used for heating, then high temperature heating is achieved, but harmful factors increase due to safety risks from open flames
Solution Approach 1:
The system replaces mechanical open-flame heating (gas burners) with electrical heating elements integrated into the tooling. This substitution eliminates open flames and associated safety hazards while maintaining effective heating capability through controlled electrical resistance heating
Solution Approach 2:
Temperature sensors and control units automatically regulate the heating elements, eliminating the need for manual operation of dangerous open flames. The system self-regulates temperature while eliminating safety risks associated with gas burner operation
4Manufacturing precision
If manual temperature adjustments are made during restart, then dimensional accuracy is attempted to be maintained, but loss of time increases due to constant monitoring and adjustment requirements
Solution Approach 1:
The system incorporates temperature sensors and control units that automatically monitor tool temperatures and regulate heating element operation. This self-regulating capability maintains dimensional accuracy during restart without requiring operator intervention, significantly reducing restart time and eliminating the need for constant monitoring
Solution Approach 2:
Temperature sensors provide continuous feedback to the control unit, which automatically adjusts heating element operation to maintain optimal tool temperatures. This closed-loop feedback system ensures dimensional accuracy is maintained during restart phases without manual intervention, reducing both time loss and operator workload
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 solution reduces process waste, minimizes operator intervention, and enables quick restarts with maintained dimensional accuracy, reducing the need for complex adjustments and calibrations, while ensuring safety and efficiency.
Implementation Method 1
a heating element (7), in particular in the form of a heating loop (6), which is arranged in the interior (10) of the press ram (3)
Implementation Method 2
temperature sensors, which are connected to a control unit
Implementation Method 3
a control unit, by means of which the press tools can be heated to the desired temperature or by means of which the desired temperature can be maintained
Implementation Method 4
the pressing tools (die holder, die, and press ram) heat up due to the plastic deformation of the slug and expand circumferentially, but primarily longitudinally
Data Source
Figure 1
AI summary
The present invention relates to a temperature control device for cold extrusion (1) with a die holder (2) and a press ram (3) for horizontal cup, reverse and flow extrusion, for the production of aluminium packaging and other flow-extruded parts, wherein the die holder (2) comprises a die heater (4) and the press ram (3) comprises a ram heater (5).