Injection molding mold production and manufacturing can be roughly divided into the following three processes:
1. Process analysis of plastic products. Before designing the mold, the designer should fully analyze whether the plastic product conforms to the principles of injection molding. He must carefully discuss with the product designer to reach an agreement. It mainly includes completing necessary discussions on the geometric shape, specification accuracy and appearance requirements of the product, and minimizing unnecessary complexity in mold production and manufacturing.
2. Overall mold design. A set of high-quality molds not only requires good production equipment and skilled mold manufacturing employees, but another very important factor is to have a good mold design. Especially for complex molds, the advantages and disadvantages of mold design account for More than 80% of mold quality. An excellent mold design solution is to achieve low production costs, low processing difficulty, and short processing time on the basis of meeting customer requirements. To achieve this, we not only need to thoroughly digest and absorb the needs of customers, but also need to have a certain grasp of the plastic machine, mold structure, production technology and the processing capabilities of the mold factory itself. Therefore, to improve the level of mold design, the following aspects should be done:
1. Understand every small detail in the design of each mold and understand the main purpose of each part in the mold.
2. When designing, refer to previous similar formulations, understand the conditions during mold processing and product production, and learn from the experiences and lessons learned.
3. Learn more about the working process of the plastic machine to strengthen the relationship between the mold and the horizontal injection molding machine.
4. Go to the processing factory to master the product processing technology and understand the advantages and limitations of each production and processing.
5. Master the test piece conclusions and mold modification status of the mold you designed, and learn lessons.
6. When designing, try to use the mold structure that was smoother before.
7. Be more aware of the interference caused by water entering the mold on the finished product.
8. Study some special mold structures and become familiar with new mold technologies.
3. Determine mold raw materials and select standard parts. When selecting mold raw materials, in addition to understanding the accuracy and quality of the product, it is also necessary to integrate the specific working capabilities of the mold factory's production, processing and heat treatment processes to make the right choice. In addition, in order to reduce the manufacturing cycle time, original standard parts are used as much as possible.
4. Parts processing and mold assembly. In addition to providing the best structural features and effective dimensional tolerances during design, the precision of the mold is also crucial for part processing and mold assembly. Therefore, the selection of processing accuracy and processing methods plays an important role in mold manufacturing. The specification error of formed products mainly consists of the following three parts:
1. The manufacturing error of the mold is about 1/3 2. The error caused by mold damage is about 1/6 3. The error caused by uneven shrinkage of the formed parts is about 1/3 4. The error caused by the inconsistency between the scheduled shrinkage and the specific shrinkage The error is about 1/6 Total error = (1) (2) (3) (4) Therefore, in order to reduce mold manufacturing errors, the processing accuracy should first be improved. With the application of CNC lathes, this situation has already been achieved Well controlled. In addition, in order to avoid errors caused by mold damage and deformation, when producing molds with higher processing accuracy requirements and larger product production volumes, heat treatment should be used for important parts such as concave molds and cores. In large and medium-sized molds, in order to save raw materials and facilitate processing and heat treatment processes, the mosaic structure should be used as much as possible when designing molds. In order to better deal with the errors caused by uneven shrinkage of formed parts and inconsistencies between predetermined shrinkage and actual shrinkage, 1/3 of the product size tolerance is generally used as the production size tolerance of the mold during mold production. The purpose is to provide The subsequent forming process leaves a large adjustment space to deal with errors caused during the forming process.
5. Test piece. A set of molds starts from design to assembly, which is only 70% to 80% of the entire manufacturing process. In view of the errors caused by the inconsistency between the predetermined shrinkage and the actual shrinkage, the degree of success of the mold ejection, the cooling effect, especially the impact of the size, location, and shape of the glue inlet on the accuracy and appearance of the product, it must be tested based on the test piece. . Therefore, test pieces are an indispensable process for testing whether the mold meets the standards and selecting the best molding process.
Dongguan Suhang Precision Components Co., Ltd. was established in 2008. The factory covers an area of more than 6,800 square meters. It is an enterprise integrating product research and development, design, mold manufacturing, and injection molding. It mainly produces auto parts, 3C electronic product casings, Industrial plastic products, plastic electrical casings and other products. Looking to the future, we always adhere to the service tenet of "taking quality as the core and pursuing development with integrity" and the business philosophy of "creating value for customers and creating opportunities for employees". Suhang will work with you to create a win-win situation. .