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Description
China manufacturer and factory for Mini Collapsible Foldable Plastic Crate Injection Molds made by P20 steel, Mini Folding Collapsible Storage Bin manufactured by high density polyethylene (HDPE) injection moulding of first fusion, compliant to the regulations concerning materials and articles intended to come into contact with foodstuffs.
100% recyclable, resistant to U.V. and infrared radiation, to high and low temperatures.
Designed for making easy storage by packing no. 3 empty crates placed one in another so as to reduce the volume to no. 2 ones only.
HDPE is used as raw material to meet these requirements and designs some crisscrossing ribs on the outer surface and the bottom of the plastic crates to increase its strength and stiffness.
For good plastic injection molding, on crate mold structure design, the crate mould often adopts 4 or 6 hot-runner drops gate (or 3 plates crate mold) due to the large size, complex shapes; due to four sidewalls with lots of ribs perpendicular to the turnover box mold open direction,4 sliders are needed to form those ribs and make the crate release away from the mold.
If you adopt point gate molds which require a three-plate structure, sequence and automatic stripping off the gate, etc., this kind of crate mould is with complex structure, large dimensions, long processing manufacture…
The maintenance of the crate mould before production
Clean the mold surface for the oil, rust, check mould cooling hole for foreign material.
Check the sprue if there is residual material.
Check the fixed mold plate and confirm if the screw clamp is tightened.
After the crate mold is fixed on the injection molding machine, injection operation should be carried out first.
Observe the movement of each part of the operation: whether there is an abnormal phenomenon, the moveable parts such as the guide pins, the ejection pins, sliders whether there is wear, lubrication is good, the stroke…
