Mold quality assurance

To ensure the quality of moulds, we must first fully understand the quality of the moulds. We must extend from the narrow sense of the quality concept that the quality of the workpieces meets the requirements to the broad sense of quality, that is, not only the quality of the workpieces should meet the requirements, but also the quality and use of the mould itself. Life, reliability, production costs, manufacturing costs, and more. It is necessary to measure from a technical and economic point of view and establish a comprehensive mold quality concept. Secondly, we must improve the quality assurance system that guarantees the quality of manufacturing with quality assurance in order to ensure the quality of the mold.

The work quality of mold production mainly includes three aspects: design work quality, production management quality, and after-sales service quality; manufacturing quality mainly includes two aspects: the quality of parts processing, and the quality of mold loading tests.

1. Designing a series of processes for the quality of mold production: purchase of raw materials and standard parts, preparation of blanks, machining of parts, assembly and debugging of molds, quality inspection, production management, etc., all based on design of. The design is the basis of mold production. The design quality directly determines the quality of the mold. It must be done first.

(1) Mold design standardization is the basic way to ensure the design quality. The mold standard is a summary of the mold manufacturing theory and practical experience. Our center has formulated a number of mold standards, as long as we can seriously design according to the standard, improve the degree of standardization of mold parts, widely used standard parts, to lay a solid foundation for the quality of the mold.

(2) Conduct necessary investigations and studies as required, including understanding the function of parts in products and the relationship of related parts, knowing the technical data and status of the equipment and materials used for molds, understanding production shifts and production, and soliciting product design and processes. The opinions of personnel and mold manufacturers and operators, collecting relevant mold design, manufacturing, and usage data, etc., are very necessary for doing a reasonable design.

(3) Applying value engineering methods, under the premise of satisfying the production volume and quality of parts, the advanced design of the mold design, the rationality of the technical requirements, and the economy of the processing technology are combined organically, with the shortest cycle and the most economical The cost of producing a user-satisfied mold enables both parties to achieve the best economic benefits.

(4) The examination and proofreading work is also an inspection of the design and is an important step in guaranteeing the design quality. It is necessary to review whether the design is reasonable, whether there are technical problems, but also whether there are mistakes in the plans, and whether the mistakes should be eliminated before putting into production. In order to enhance the responsibility of the reviewing school, if there are quality problems caused by the design aspects, the reviewing school should bear joint responsibility.

(5) Continuously improve the quality of designers, and carry out continuous engineering education work in a planned manner. It is necessary to understand the new trends in the development of mold technology at home and abroad, to master the new mold technologies at home and abroad, and to strive to apply them in practice. Through the production practice to enrich the design experience, do their best to in-depth production site, understand the whole process of mold production, solve problems in time to resolve, to make relevant records, change the relevant drawings, in order to accumulate information.

(6) Actively create conditions to apply CAD/CAE/CAM technology in mold design and manufacturing, which is the only way to ensure mold quality.

2. Production management quality This is the organizational guarantee for the quality of the mold.

(1) Emphasizing production preparation, we must minimize the preparation of rough parts according to the design requirements, provide supporting standard parts as soon as possible, increase the commercialization of standard parts, and provide material guarantee for ensuring the quality of the mold and shortening the production cycle of the mold.

(2) To strengthen labor management, it is necessary to focus on improving the quality of operators, constantly instilling the idea of ​​“quality first”, strengthening technical training work, conducting post training, operating competitions, etc., in order to form a ethos of consciously researching technology and reversing the current situation as soon as possible. The decline in the level of technology has created a team of highly skilled and skilled technicians.

(3) To formulate plans to proceed from the needs of users, the various tasks of mold production must be carried out according to plan. Problems must be promptly taken to solve the problems. We must do a good job in production scheduling with the completeness of the mold parts and ensure the molds. Manufacturing can input and output on schedule at all stages.

(4) Strengthen quality management. To truly achieve total quality management, it is necessary not only to perform quality management on parts processing and mold assembly, but also to perform quality management on various tasks including design. The quality veto system must be implemented in practice, changing the one-sided approach of rewarding only non-punishment or only penalizing manufacturing quality issues and the quality of non-punishment work. We often carry out various forms of quality activities, quality research, quality analysis, quality mold design, manufacturing awards, and more. To maintain a strong sense of quality, we must allow people who understand mold to manage the quality of molds. We must make quality management work at the production site to facilitate preventive work and prevent quality management personnel from making mistakes due to quality management. It is also a nonconforming product and should be treated in the same way as the operator fails to improve the responsibility of the quality management personnel.

3, the quality of parts processing must strictly implement the process discipline, according to the process specification operation. To ensure the integrity of the equipment and tools, update the equipment in a timely manner.

Create good conditions for processing quality products. Pay attention to the quality of heat treatment and avoid the hidden dangers caused by improper heat treatment. Because the polishing quality of the cavity directly affects the appearance and quality of the parts, and the polishing workload is large, accounting for about one third to one quarter, the labor intensity is large, and the artistry is strong, and must be given great attention. Use new technologies, new processes to ensure and improve the quality of the mold. It is necessary to strictly control the quality of processing in each process and ensure that it does not flow into the next process, and creates good conditions for the assembly of qualified parts.

Parts are not qualified. For processors, they should be treated as non-conforming products. It is another matter that they can be used after technical processing. Therefore, they cannot be counted as qualified products, otherwise the quality will be difficult to increase.

4, mold loading test quality mold assembly is the key to the final decision mold quality. In the case of providing all qualified parts, such as the assembly process, improper assembly technology will also affect the quality of the mold, and the impact of the part error on the mold will be eliminated through the assembly process. However, due to more and more advanced processing equipment, replacing some of the locksmith operations, some people mistakenly believe that the assembly is simple, especially the novice, do not pay attention to the skills, affecting some of the highly skilled operation level, can not adapt to the more The higher the mold quality requirements, the developed countries a try mold rate of 80% -90%, compared with, we still have some distance, which is a part of the processing quality, especially the quality of the assembly has a great relationship. Therefore, we must pay close attention to improving the technical level of the mold fitter to ensure the quality of assembly and improve the qualification rate of a trial mold.

In the process of assembly and commissioning, necessary inspections shall be carried out, including the testing of component assembly, recording of test data, ease of searching, correction of errors, one-step inspection of assembly, and assurance of the next step of assembly and rework.

All kinds of preparatory work should be done in the trial mode: check whether the test equipment, test materials (pieces), mold installation adjustment, test conditions, etc. meet the technical requirements. It is necessary to perform trial moulding and to extract test specimens in accordance with national standards or conditions agreed upon by the users. After passing the test mode, the molds will be placed in the warehouse or delivered to users as required. If it fails, you should find out the reason for repair until it is qualified. Throughout the trial process, quality management personnel should supervise and inspect according to regulations to ensure the quality of trial moulds.

5, after-sales service quality After-sales service work is to solve the user exposed in the process of using the mold quality problems, the second is to solve the cause of the user due to mold damage. Regardless of the circumstances, the first thing to do is to repair it as soon as possible. This requires a full-time or part-time skilled service team to serve customers.

The quality problems exposed should be promptly fed back to the design and manufacturing departments. If necessary, they should also be allowed to go to the scene to find out the reasons and improve them. For the user's reasons, they should assist in the search and put forward suggestions for improvement. At the same time, they should also make necessary records so that they can examine them in the future. In the event of similar users, they may also draw their attention to them. For those users who do not have feedback quality problems, they should also follow the service. , Actively solicit opinions from users, accumulate data from them, and provide a strong basis for mold quality assessment.

In doing so, the quality management of the mold is expanded from the traditional management of the production process to the management of the entire process of production and operation. The first-hand information that has been verified by the production practice is obtained from the user to finally evaluate the quality of the mold.