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+--- Thread: Why thin wall cup mould so expensive? (/showthread.php?tid=840)
Why thin wall cup mould so expensive? - adsdf5dfg - 10-11-2021
Why thin wall cup mould price is so high? General speaking, thin wall cup mould are using better steel, hot runner, better cooling, better venting and better demolding effectiveness.
The thin wall cup mould runs on high speed machine which needs withstand high pressure during cup molding, so the mould moving plate and fixed plate thickness are thicker than common mould. There need many interlocks inside the thin wall mould to ensure accuracy and pillar support to avoid deform and eccentric. The plastic airline cup mould need use high hardness steel, high-wear and high-erosion with HRC 55 or above. This means thin wall mould steel cost is higher.Thin-walled products do not withstand the large residual stresses due to heat transfer irregularities like traditional wall thickness parts. In order to ensure the dimensional stability of the product, and to control the shrinkage and warpage within an acceptable range, it is necessary to strengthen the cooling of the mold to ensure the cooling balance. Which means need better cooling design to enhance the cooling effect, adding high conductivity metal inserts where necessary to accelerate heat transfer, like BeCu beryllium copper. The cooling cost is higher than common moulds.
Cutlery mould exhaust problem
In the process of producing cutlery mould, sometimes will have unfilled parts, air bubbles etc, this is caused by air exhaust.
Injection molding is a process in which a molten plastic is injected into a closed mold having a relatively low temperature through a nozzle under high pressure. Both thermoplastics and thermosets can be injection molded. It can be used to make various box-type packaging buckets and pails, such as various pails boxes and small boxes mould. For box-type packaging containers, China bucket mold manufacturers will consider the following aspects in bucket mould structural design.
1. The wall thickness of the bucket mould
Household molds are a form of fungus. There are many different types, and they can occur both indoors and outdoors.
Molds produce spores, which spread by floating around in the air. Mold spores are present in all indoor environments. There is no way to prevent spores, and they can persist in conditions where mold itself cannot grow.
Mold spores thrive in environments that are moist and warm, so when they land on a damp spot, they begin to grow.
Molds can grow on a variety of different surfaces, including fabric, paper, wood, glass, and plastic. As they grow, they may digest the material they are growing on.