The design of the 20L Bucket Mould cooling system is a relatively complicated work. We need consider the cooling effect and the uniformity of the cooling, and the influence of the cooling system on the overall structure of the mold as well as the specific position and size of the cooling system.
Such as the cooling for the movable plate and the important inserts, the cooling for the side slider and the side core, the design of the cooling element and the selection of the cooling standard components.
Our company began to analyze these series of problems during bucket mould design. Our bucket mould uses circulating water to flow in every part of the mould, reducing the cooling time during injection molding, improving the production efficiency of the product and greatly reducing the production cost.
Our plastic bucket mold adopts the I-shaped structure, the cavity and core are 2738HH, the slider, the guide groove and the insert are 2316 or 718H, the guide post, the guide sleeve, the sprue sleeve, the pull rod and the reset rod With SKD standard parts, the formwork adopts a standard mold base.
Corrosion resistance, toughness, thermal conductivity and hardness of good materials make polishing easier, saving production cycle, extending mold life, reducing maintenance and repair time, reducing the risk of cracking and increasing productivity.
For the capability of the bucket moulds, it could be from 500ML to 20L. For the cavity, usually we can make 1, 2 or 4 cavity. Most of the paint buckets with lid should be no leakage and have the anti-theft deisgn.
How to avoid the bucket mould core eccentric, which caused the bucket wall thickness not even?
1. Optimal and equal cooling effects in different area of cavity and core of the bucket moulds.
For paint bucket mould core, design the cooling channel 15mm below the molding surface.And the diameter of the paint bucket mould cooling channel should be more than 12mm, so that the water can run smoothly in the channel while taking away the heat in the core.
For paint bucket mould cavity,the cooling system design near the hot runner tip area is very important, this area is very sensitivity. Bad cooling system will directly influence the bucket's cycle time and out looking.
Of course ,some customer want to reach high speed injection with shorter cycle time, we suggest to use BeCu insert in the core top,cavity bottom and slider.
2. The lock height of the plastic bucket moulds: In general, the lock height of the plastic bucket mould is 20%-30% than the plastic bucket. Smaller barral mould is 20% and bigger pail mould should be about 30% height.
To make a high quality painting bucket mould, we have to choose suitable steel for the 18L Bucket Mould.
3. The accurate machining process to the bucket mould cavity and cores.