How to effectively improve the processing accuracy of injection molds

Improving the accuracy of mold processing has always been a headache for many enterprises, and today Fanshida Intelligent Technology Co., Ltd. provides several ways to improve the precision of mold processing.

The methods to effectively improve the precision of injection mold processing can be roughly summarized into the following four types:

1. Reduce the original error

Improving the geometric accuracy of the machine tool used in parts processing, improving the accuracy of fixtures, measuring tools and tools themselves, controlling the force of the process system, thermal deformation, tool wear, deformation caused by internal stress, and measurement errors are all directly reducing the original error. In order to improve the machining accuracy, it is necessary to analyze the original errors that produce machining errors, and take different measures to solve the main original errors that cause machining errors according to different situations. For the processing of precision parts, the geometric accuracy, stiffness and thermal deformation of the precision machine tool used should be improved as much as possible, and the processing of parts with forming surface is mainly how to reduce the shape error of the forming tool and the installation error of the knife county.

This method is a basic method that is widely used in production. It is an attempt to eliminate or reduce the main factors that cause machining errors after identifying them.

2. Transfer the original error

The error transfer method is essentially the geometric error, force deformation and thermal deformation of the transfer process system. There are many examples of the error transfer method. For example, when the accuracy of the machine tool does not meet the requirements of parts processing, it is often not to blindly improve the accuracy of the machine tool, but to find a way from the process or fixture to create conditions so that the geometric error of the machine tool is transferred to the aspect that does not affect the machining accuracy.

3. Divide the original error evenly

In mold processing, due to the existence of blank or previous process error, often cause the processing error of this process, or due to the change of workpiece material properties, or the process change of the previous process (such as after the blank refinement, the original cutting process is canceled), causing a large change in the original error. The solution to this problem is to adopt the method of grouping to adjust the equalization error. The essence of this method is to divide the original error into n groups according to its size, and the error range of each group of blanks is reduced to the original 1/n, and then adjust the processing according to each group respectively.

4. Homogenize the original error

Grinding processes are often used for shafts and holes that require high fitting accuracy. The grinding tool itself does not require high precision, but it can perform micro-cutting on the workpiece in the process of relative motion with the workpiece, and the high point is gradually ground off (of course, the mold is also partially removed by the workpiece), so that the workpiece can achieve high precision. This process of friction and abrasion between surfaces is the process of continuous reduction of error, which is the error equalization method.

Fanshida Intelligent Technology Co., Ltd. produces precision multi-cavity pen molds, automotive molds, thread-to-tooth molds, mold design and development, mold core design, processing and manufacturing. We sincerely welcome friends from all walks of life to visit our company, inspect, guide the work and negotiate business!