Considering economic factors, sampling inspection methods are widely used in product quality inspection. Many countries have carried out systematic research on the standardization of sampling inspecti...
Hardness Test The hardness test is a simple method to predict the strength and wear - resistance of mold materials. Although there are various methods for determining hardness, they are basically divi...
The inspection and testing of mold materials can be broadly classified into two categories: one is the microstructure test, including macrostructure test, microstructure test, grain size test, etc.; t...
I.Section 1 Basic Knowledge of Quality Inspection WorkOverview Firstly, one should be familiar with the specified requirements (quality standards) for one or more characteristics being inspected, and ...
① There are Two Types of Quality Defects During a training session, I once asked, "What is meant by a product with quality defects?" Most people couldn't answer immediately. After a sho...
① Differentiating between Quality Defects and Action Errors It is often said that it is impossible to guarantee a defect rate of 0, but a rate of 0 self - errors can be guaranteed.The defect mentione...
(1) Drawbacks of Polishing Quality Issues1) The edge of the cavity’s inner hole may have collapsed corners, mixed angles, or bruises, and after polishing, the opening of the inner hole may enlarge (c...
During the injection molding process, the injection speed affects the flow state of the molten material in the mold cavity, which in turn influences the quality of the product.Low Injection Speed: Whe...
1. Causes of Poor Surface GlossWhen evaluating the gloss of injection-molded products, the key factors are the degree of brightness on the surface and the uniformity of that brightness. Typically, two...
The acceptance of injection parts consists of internal quality acceptance and external quality acceptance.(1) External Quality Inspection and Acceptance of Plastic PartsUnder normal conditions of inje...
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