Let us continue to discuss the plastic inejction chair mould after choosing a good chair mould one.
b. have to be sure that each
cutting, the depth will not bigger than 0.08mm. All these are because of the steel
will be deformed when milling and after hardening. The deforming will cause the
cavity and core’s fitting are not accurate, there will be a lot of hand works
on it,.By hand works on the parting area, you can never work out a perfect
parting line.
chair weight, thickness and
the strength reach your requirement or not?
Usually , the main reason to
effect the wall thickness is plastic chair 3Dde sign and polishing on the
cavities and cores. So before we start manufacturing, we need to check design
carefully. Hard working on the parting line also be one of the reason for wall
thickness is not even.
Sometimes, we need to make
some area more thick to ensure the chair strength. And on the other hand, the
uneven wall thickness will cause the unbalance injection and uneven cooling.
Hard working on the parting line also be one of the reason for wall thickness
is not even.
That will cause slow injection
speed and maybe shrinkage marks happened. If CNC milling is too rough, the
chair wall thickness could not be even.
When we check the chair
stackable, we need to pay attention for the chair deform during chair injection
molding.
In a word, we need to check
the design for the chair thickness and strength. especially for the bottom
area. Such area is important to hold a weight of one person. Sometimes, we need
to add some ribs to improve chair strength. During the design, we also could
calculate or analyze the force of each area. If you want to make a light chair
but strong enough, you can choose a very low MFI PP material. But in this way,
you need to know attention the injection filling during mould testing. Usually
the material MFI would be 4-6.
If you are interested in
plastic injection chair mould. welcome to visit our factory!
Posted by Bonnie
service37@sinomould.com
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