Segmented Hot Stamping Mold Block Heater
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Solution Overview
Problem
Existing hot stamping mold technologies face challenges in achieving uniform temperature distribution and controlling preheating, leading to unstable strength and dimension of molded panel products, particularly with ultra-high strength steel plates, which are brittle during vehicle collisions and prone to fracture.
Innovation Solution
A mold device with a block heater having a coil structure is inserted into the lower portion of a partial softening hot stamping mold to create a uniform heater distribution, using segmented block molds and heaters with an insulating base to maintain consistent temperature and minimize thermal expansion deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a cartridge heater is inserted into a side portion of the mold, then the steel plate can be softened to low strength, but the temperature distribution becomes non-uniform causing unstable strength and dimension of molded products
Solution Approach 1:
The mold is divided into multiple heating zones with separate cartridge heaters inserted at different locations (side portions and lower portions). This segmentation allows independent temperature control in each zone, achieving uniform overall temperature distribution while maintaining the ability to soften the steel plate to the desired low strength level.
2Device complexity
If the softening part shaped mold is made into an integrated type, then the mold structure is simplified, but the heating volume becomes excessive making it difficult to control preheating and temperature
Solution Approach 1:
The softening part of the mold is divided into multiple separate heating zones rather than being integrated as a single unit. Each zone has its own heating control, allowing precise preheating and temperature management. This segmentation prevents excessive heating volume while maintaining structural simplicity through modular design.
3Device complexity
If the softening part shaped mold is made into an integrated type, then the mold structure is simplified, but thermal expansion deformation becomes excessive
Solution Approach 1:
The softening part is segmented into multiple separate heating zones instead of being integrated. This segmentation reduces the overall continuous heated volume, thereby minimizing cumulative thermal expansion deformation. Each segment can expand independently with smaller magnitude, maintaining mold stability while keeping the structure relatively simple.
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 ensures uniform temperature management, stabilizes the strength and dimension of molded products, and reduces the need for frequent heater replacement by allowing modular assembly and disassembly, enhancing the robustness and convenience of the hot stamping process.
Implementation Method 1
an outer circumferential surface of each of the block heaters may be provided with a coil to generate heat
Implementation Method 2
an insulating base between the block molds and the softening part of the hot stamping mold
Data Source
AI summary
The present invention relates to a mold device for hot stamping, and includes: a hot stamping mold that molds an ultra-high strength steel plate and has a softening part; and a block heater part that is inserted into a lower portion of the softening part of the hot stamping mold to soften the ultra-high strength steel plate, in order to maintain a uniform temperature distribution of the softening part of the hot stamping mold and improve the temperature management and the maintenance performance of the softening part by providing a segmented structure for inserting the block heater part into the softening part of the hot stamping mold.