How to improve mold accuracy?
Mold precision is reflected in the product dimensions.
How to improve the precision of the mold? Mainly from the mold design and mold processing 2 perspectives to consider, in addition to say a little bit of the product's own defects will also affect the mold precision!
01 Mold Design
① Product pre-mold flow analysis, to find a more reasonable product into the glue point to achieve the balance of the glue, clamping force in the range of injection molding machine, the product deformation is
relatively small
② Product molding: can do flat surface is not designed to arc, can be touched through not to do the insertion of wear
③ Product positioning: do three levels of fine positioning: the inner mold tiger positioning, mold guide pillar positioning, edge locking position
④ Product cooling: the distance of water from the product, the same interval as far as possible, uneven cooling product deformation
⑤ mold avoidance: after reserving a certain sealing surface, the other surface to do avoidance, before and after the mold are avoided, not only to improve processing accuracy, but also to improve processing
efficiency.
⑥ Mold fractal surface plus balance block support, offset part of the PL surface clamping surface, to avoid the fractal surface of the inner mold collapsed too quickly.
⑦ Ball guides or bronze with graphite are used to support the ejector pin plate.
⑧ B plate cavity bottom depth as thick as possible, to avoid deformation of the injection mold plate, plus support head will not play a big role.
⑨ Label the machining tolerance of each part drawing.
02 Mold Processing
① Mold core machining with high finishing machine, accuracy of 0.02μ.
② Mold core processing is best to be formed once, to avoid repeated down the machine, each centering calibration table will be an error.
③ Mold core wire cutting with slow walking wire
④ Core inserts can be processed by grinding machine without computerized gong, especially for round inserts.
⑤ Flying mold can not use grinding machine, directly on the flying mold machine.
⑥ The precision of mold blanks should be controlled within 0.02mm, the normal mold is more than 0.05mm.
⑦ steel material for the inner mold electric level with three-dimensional full inspection, better computer gong can be directly on the machine inspection
⑧ electric level processing with red copper, do not use graphite, graphite spark fast, but easy to damage the public, especially the thin steel bits
Summary：
Mold precision requires a set of reasonable design and processing process control in order to do out, each link out of the problem on the precision has an impact!
If you have mould needs, please do not hesitate to contact us!
