The precision control and quality inspection methods of plastic mold are essential to ensure the performance of plastic mold, extend the service life and improve the quality of plastic products.
In the early stage of plastic mold design, the precision requirements of plastic mold need to be fully considered. This includes accurately calculating the size of plastic mold cavity and core according to factors such as the size, shape and material shrinkage of plastic products. The wear of plastic mold during use should also be considered during the design process, and appropriate processing allowance should be reserved. At the same time, a reasonable cooling system layout is also an important part of ensuring the precision of plastic mold, which helps to reduce the dimensional changes caused by uneven temperature.
The use of high-precision CNC machining centers, EDM machines, wire cutting machines and other equipment is the basis for achieving high-precision processing of plastic mold parts. These equipment have high-resolution control systems and precise transmission mechanisms to ensure the processing accuracy of plastic mold parts. During the equipment installation and commissioning stage, it is necessary to ensure that its accuracy meets the requirements, and regular maintenance and calibration are carried out to ensure the stability of the equipment during processing.
The selection of tools and the planning of tool paths have a great influence on the dimensional accuracy of plastic molds. According to different materials and processing requirements, choose the appropriate tool type, tool geometry and cutting parameters. At the same time, optimize the tool path, avoid sudden acceleration or deceleration of the tool, reduce the fluctuation of cutting force, and thus reduce the change of plastic mold size. In addition, adopting a reasonable processing sequence, such as rough machining to remove most of the excess, and then semi-finishing and finishing, can gradually improve the processing accuracy.
In the process of plastic mold processing, high-precision measurement tools and methods are essential to ensure the accuracy of plastic mold. Use high-precision measurement tools such as three-coordinate measuring instruments and optical projectors to accurately measure plastic mold parts. When measuring, choose appropriate measurement points and measurement methods to ensure the accuracy of the measurement results. At the same time, multiple measurements should be performed during the processing process to promptly discover and correct processing errors.
Heat treatment process can eliminate the internal stress generated during the processing of plastic mold and stabilize the size of plastic mold. In subsequent processing, such as EDM, wire cutting, etc., pay attention to controlling the processing parameters to avoid affecting the size of plastic mold. In addition, thorough cleaning of plastic mold parts to remove processing residues and oil stains is also an important step to ensure the accuracy of plastic mold.
Establish a strict quality control system and conduct strict quality control on all aspects of plastic mold manufacturing. Formulate quality standards and inspection specifications, and strengthen the inspection of raw materials, processing, assembly and finished products. Timely analyze and deal with quality problems, take effective corrective and preventive measures to avoid the recurrence of problems. At the same time, provide professional technical training for staff in plastic mold design, processing, assembly and other links to improve their skill level and quality awareness.
After the plastic mold is assembled, debugging and trial mold testing are key steps to ensure the accuracy of plastic mold. Optimize the performance and accuracy of plastic mold by adjusting injection molding process parameters, plastic mold temperature, pressure and other factors. Analyze and solve problems that arise during the trial mold process, such as dimensional deviation, surface defects, etc. According to the trial mold results, make necessary adjustments and improvements to the plastic mold to improve the precision of the plastic mold. In addition, regular inspection and replacement of plastic mold accessories to ensure their good performance is also an important measure to ensure the accuracy of plastic mold.
The precision control and quality inspection methods of plastic mold involve many aspects of plastic mold design, including the precision requirements in the initial design, the application of high-precision processing equipment, tool selection and path planning, high-precision measurement tools and methods, heat treatment and subsequent processing, strict quality control system, and plastic mold debugging and trial mold testing. These measures jointly ensure the precision and quality of plastic molds and provide a strong guarantee for the production of high-quality plastic products.
