Polymer-Metal Dummy Round Balancing Training Weight and Cost
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Solution Overview
Problem
Traditional training rounds face challenges in balancing cost, weight, and material selection, with plastic rounds being too light and metal rounds being too heavy, affecting the authenticity and hand feel of training.
Innovation Solution
A dummy round composed of a polymer dummy round head and a metal dummy round case, with a threaded connection and identification elements, to achieve a weight closer to a real round while reducing production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If plastic material is used for training rounds, then production cost is reduced and machining is easier, but the weight becomes too light compared to real rounds, affecting hand feel and training authenticity
Solution Approach 1:
The patent applies composite materials by combining plastic for the round head with metal for the round case. The plastic round head maintains ease of manufacture and cost-effectiveness, while the metal round case provides the necessary weight to closely match real rounds, thereby resolving the contradiction between manufacturing ease and weight requirements.
2Weight of moving object
If metal material is used for training rounds, then the weight approaches that of real rounds, improving hand feel and authenticity, but production cost increases
Solution Approach 1:
The patent uses composite materials where only the round case is made of metal to achieve realistic weight, while the round head remains plastic to control costs. This selective application of metal versus plastic resolves the contradiction by achieving weight authenticity without the full cost premium of complete metal construction.
Solution Approach 2:
The patent applies local quality by using metal only in the round case portion where weight is needed, while keeping the round head as plastic where cost control is prioritized. This localized material selection allows the training round to achieve realistic weight without the full production cost penalty of complete metal construction.
3Weight of moving object
If high density material is used for training rounds, then weight increases to match real rounds, but the weight may exceed standard round range, affecting training authenticity
Solution Approach 1:
The patent uses composite materials with different density characteristics - plastic for the round head and metal for the round case - to precisely control the overall weight within standard round ranges. This allows the training round to achieve realistic weight without exceeding standard specifications, maintaining training authenticity.
Data Source
AI summary
A dummy round includes a dummy round head and a dummy round case. The dummy round head is a polymer dummy round head. The dummy round case connected to the dummy round head. The dummy round case is a metal dummy round case. Since the dummy round is composed of the polymer dummy round head and the metal dummy round case, a polymer material has relatively low costs and is easy to process and shape. By properly combining the two different materials, the overall dummy round is formed. Compared with a traditional full-plastic or full-metal round, the dummy round has an overall weight closer to that of a real round, and the production costs are reduced.