How to improve mold precision? The best embodiment of mold precision is in produ
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- 日期 : 2023-06-08
The best embodiment of mold precision is in product size
How to improve the precision of the mold? It is mainly considered from the perspective of mold design and mold processing. In addition, the defects of the product itself will also affect the precision of the mold
01 Mold design
02 Mold processing
Mold accuracy requires a complete set of reasonable design and processing process control. Problems in each link will affect the accuracy.
How to improve the precision of the mold? It is mainly considered from the perspective of mold design and mold processing. In addition, the defects of the product itself will also affect the precision of the mold
01 Mold design
- Find the best glue point through mold flow analysis in the early stage to achieve glue injection balance, the product deformation is minimal when the clamping force is within the range of the injection molding machine
- Mold splitting: Prefer plane rather than curved surface, prefer kiss off rather than shut off
- Product positioning: Three-level precise positioning: web positioning for internal mold, guide post positioning for mold blank, edge lock positioning
- Product cooling: the distance between the water and the product should be the same as possible, and the product will be deformed due to uneven cooling
- Mold clearance: After a certain sealing surface is reserved, keep clearance for other surfaces, both the front and rear molds, which can not only improve the processing accuracy, but also improve the efficiency
- The fractal surface of the mold base is supported by a balance block to offset a part of the clamping surface of the PL surface, so as to avoid the fractal surface of the inner mold from collapsing too quickly
- Ball bushings or bronze plus graphite for thrusters in the ejector plate
- The depth of the bottom of the opening of plate B should be as thick as possible to avoid deformation of the injection molding template, and the addition of braces will not play a big role
- Machining tolerances are marked on each part drawing
02 Mold processing
- The mold core is finished with a high-end machine, with an accuracy of 0.02μ
- It is best to process the mold core at one time to avoid repeated unloading, or there will be errors in the meter calibration every time
- Slow feeding for core wire cutting
- Core inserts can be processed by grinding machines, especially round inserts
- Do not use a grinder for the fitting model, but use spotting machine directly
- The accuracy of the mold base is controlled within 0.02mm, and the normal mold is 0.05mm
- Three-dimensional full inspection is used for the internal mold steel electrode, and better CNC can be directly inspected on the machine
- Red copper rather than graphite is used for electrical machining. Graphite sparks quickly, but it is easy to damage, especially for thin steel parts.
Mold accuracy requires a complete set of reasonable design and processing process control. Problems in each link will affect the accuracy.
