Plastic mold manufacturer for glue wholesale network, principles and process requirements for plastic mold processing

Before manufacturing plastic molds, they usually have a complete process diagram to determine the processing technology and accuracy of each step. This is a prerequisite for ensuring the success of plastic mold production, and also an essential factor in ensuring the quality of the mold produced. Today we will focus on discussing the processing principles and precision of plastic molds, as well as the factors that need to be considered during design.

1、 Principle of processing reserve 1 For workpieces that require heat treatment processing, a grinding machine allowance of 0.25mm should be added on one side of the external material preparation size before heat treatment; 2. For the parts of the mold core and inserts that require CNC rough machining, the reserved margin on one side should be 0.2mm; 3. The allowance for rough milling on one side of the fitter milling machine is 0.3-0.5mm. For workpieces that need to be machined by the grinding machine after line cutting, 0.05mm should be reserved on one side of the forming part, and 0.1mm should be reserved on one side of the rough milling machine; 4. After CNC precision machining and electrical pulse, mirror polishing is required, with a polishing allowance of 0.03mm left on one side.
2、 Processing accuracy requirement 1 The manufacturing accuracy of mold dimensions should be within the range of 0.005-0.02mm; 2. The verticality requirement is within the range of 0.01-0.02mm; 3. The coaxiality requirement is within the range of 0.01 to 0.03mm; 4. The parallelism of the upper and lower planes of the movable and fixed mold parting surfaces is required to be within the range of 0.01 to 0.03mm. After the mold is closed, the gap between the parting surfaces should be less than the overflow value of the formed plastic; 5. The parallelism of the other template mating surfaces is required to be within the range of 0.01-0.02mm; 6. The fitting accuracy of the fixed part is generally selected within the range of 0.01 to 0.02mm; 7. If there are no requirements for mating or if the size of the small core is not significantly affected, a gap fit of 0.01-0.02mm on both sides can be used; 8. The fitting accuracy of the sliding part is generally selected as H7/e6 There are three types: H7/f7 and H7/g6.
Attention: If there are inlays with hanging steps on the mirror surface, the fit should not be too tight. Otherwise, when the inlay is knocked back from the front, the tools used to knock may damage the mirror surface. If it does not affect the product size, a gap fit of 0.01-0.02mm on both sides can be used.
The above are some core contents of plastic mold processing principles and process requirements. Following these principles and requirements can ensure that the production quality and accuracy of plastic molds meet the requirements. In the actual processing process, strictly implementing these regulations and continuously optimizing the process flow will help improve the efficiency of mold processing and product quality.