Two-Stage Mould Compaction for Uniform Metal Casting Strength
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Solution Overview
Problem
Existing methods for producing molds for metal casting result in non-uniform compaction and strength due to unequal force distribution, leading to inconsistent quality and increased defects in cast metal products.
Innovation Solution
A two-stage compaction method where the molding box is moved over a first path to a stop and then further compressed over a second path, with the length of the second path adjusted based on the properties of the molding material, using sensors to measure and control the force for consistent mold hardness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a single-stage compaction process is used, then the production process is simple, but the mold strength is non-uniform and quality is inconsistent
Solution Approach 1:
The compaction process is divided into two distinct stages: a first compaction stage that applies initial force to the molding material, and a second compaction stage that applies additional force to achieve uniform density. This segmentation allows each stage to be optimized for its specific function, resulting in consistent mold strength throughout.
Solution Approach 2:
The patent implements dynamic adjustment of the compaction process by using sensors to detect the actual density or force applied during the first compaction stage, and then automatically adjusting the parameters of the second compaction stage based on this feedback. This dynamic adaptation ensures optimal uniformity regardless of material variations.
2Manufacturing precision
If post-compaction is applied to improve quality, then mold strength improves, but dimensional stability remains inconsistent
Solution Approach 1:
The system incorporates sensors that measure the actual compaction state after the first stage and provide feedback to control the second compaction stage. This closed-loop feedback ensures that the final compaction achieves both the desired strength and dimensional stability by adjusting parameters based on real-time measurements.
Solution Approach 2:
The patent changes multiple parameters during the two-stage process, including compaction force, compaction speed, and duration, to optimize both mold strength and dimensional stability. The second stage specifically adjusts these parameters based on the state achieved in the first stage to ensure consistent results.
3Manufacturing precision
If the second path length is fixed, then the process is simple to control, but the mold quality varies with material properties
Solution Approach 1:
The length of the second path is made dynamically adjustable based on sensor feedback from the first compaction stage. The control system automatically modifies the second path length to compensate for variations in material properties, ensuring consistent mold quality across different batches and conditions.
Solution Approach 2:
The patent changes the geometric parameter of the second path length based on measured material properties and compaction results from the first stage. This parameter adaptation allows the process to maintain optimal quality consistency despite variations in molding material characteristics.
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 approach ensures consistent mold strength and quality by adjusting the compaction process according to the material's properties, reducing defects and maintaining high-quality cast metal products over time.
Implementation Method 1
the molding material is compacted in the molding box. The compression takes place according to the invention in two steps
Implementation Method 2
using sensors to measure and control the force for consistent mold hardness
Data Source
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AI summary
The aim of the invention is to produce improved moulds for the casting of metals without increasing the complexity of production. By "improved" it is meant that the mould, consisting of the mould material, permanently has a surface of uniform hardness, even in the event of a change or variation in the quality of at least one of a plurality of properties of the mould material. Also disclosed is the production of a mould material mould for a cast having minimum strength for the casting of metals. A granular mould substance is poured into a mould box (40) as a mould material (41). The mould substance (41) is compacted in the mould box (40) in a mould system above a pattern (44) which stands on a pattern plate (46). In a first step, the mould box (40) is moved by a press device (1) across a first distance to stop against a frame (13) of a press head (10). In a second step, the pattern plate (46) is moved by the press device (1) across a second distance (s1, s2) into an end position in order to harden or compact (create) the mould material mould. A length of the second distance (s1,s2) is preferably automatically changed in accordance with the mould material, or the second distance (s1,s2) is changed as a result of a change in at least one property of the non-compacted mould material (41) and in accordance with a force determined at the end of a previous hardening or compacting of the mould material of the previous mould (100,102;102'). The proposed mould machine operates in the manner of a hardness control (strength control) of the mould material (41) in the compacted mould.