Visual injection molding production process verification method

Abstract

The invention discloses a visual injection molding production process verification method. The method comprises the following steps of S1) collecting a product batch, an injection molding machine state, plastic characteristics and mold characteristic data; S2) setting injection molding process parameters and corresponding production thresholds; S3) monitoring a current process curve in real time in an injection molding process, comparing and verifying the current process curve with a standard process curve in an early mold testing stage, and if the current process curve does not accord with the standard process curve, determining that a product is a defective product; and S4) continuously verifying an appearance size parameter of the product passing process curve verification, and if an appearance size meets a requirement, determining that the product is a good product. The process curve formed in the production process can be monitored and controlled, consistency of injection moldingproducts is improved by controlling process parameters, abnormity of the whole batch is avoided, and meanwhile, good products and defective products are completely separated, and production cost of anenterprise is reduced.

Description

technical field [0001] The invention relates to a production process verification method, in particular to a visual injection molding production process verification method. Background technique [0002] Traditional product process verification is achieved by setting constant parameters, and then verifying the appearance of the product manually or by machine, as well as sampling the tensile, folding, compressive, low temperature and other properties of the product. Practice has proved that this method is not accurate enough. On the one hand, it will cause defective products that do not meet the requirements in appearance, resulting in waste of materials, labor costs and time; The failure to meet the standards has brought great troubles to the product delivery team and the quality control department, and has also seriously affected the cost reduction and efficiency increase of the company and brand building. [0003] Since the process guarantee technology of traditional inje...

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Problems solved by technology

Practice has proved that this method is not accurate enough. On the one hand, it will cause defective products that do not meet the requirements in appearance, resulting in waste of materials, labor costs and time; The failure to meet the standards has brought great troubles to the product delivery team and the quality control department, and has also seriously affected the cost reduction and efficiency increase of the company and brand building

[0003] Since the process guarantee technology of traditional injection molding production only pays attention to the constant setting of machine parameters, however, the time-varying nature of plastic products in the injection molding process is very strong, and slight disturbances in the external environment such as production environment, production equipment, molds, and material properties will lead to injection molding. The working condition of the process fluctuates, which affects the consistency of the product, and the subsequent product quality detection is difficult and the feedback takes a long time, which will cause quality control difficulties and waste of production costs.

[0004] At present, there are mold flow analysis software on the market, such as Moldflow, Moldex3D and other products that can simulate well, but they are mainly used in forward design. The actual production environment is affected by many factors such as equipment, materials, and factory environment; therefore, the simulation environment It is often quite different from the actual production environment

[0005] In addition, the source of the status data of the injection molding machine during the injection molding process is the injection molding machine. The status data of the injection molding machine includes data such as injection pressure, speed, time, and holding pressure. There will be a large error in the calculation

[0006] It can be seen from the above that the current production method with constant machine parameters does not represent a constant production process. The actual performance of the product will vary with the change of the production environment, and the actual process of the output product will also appear to be substandard. Follow-up Manual or machine verification of appearance and random inspection of product performance take a long time, the accuracy is not high, and it will cause waste of production costs

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