Brief Analysis Of Injection Molding Equipment For Alumina Ceramics

Alumina ceramic injection molding machine is generally composed of plasticizing device (or injection device),mold clamping device,oil pressure device,and electronic and power supply control device.The type can be divided into plunger type and parallel propeller type according to the different internal structure of plasticizer.In recent years,it is generally believed that the latter has more advantages.

Alumina ceramic injection molding machine is based on the electronic and power control device,which drives the hydraulic device and makes the plasticizer and mold clamping device work sequentially.The working procedure is:The ceramic raw material is put into the cylinder body through the funnel,the raw material is melted and stirred while being sent to the end of the cylinder body,and injected into the cavity of the metal mold through the nozzle at the end of the cylinder body .

Alumina ceramic mold materials generally use alloy steel with high cleanliness,wear resistance and corrosion resistance.The mold design should conform to the flow characteristics of the ceramic-polymer system.In order to reduce the shrinkage of the molded body and prevent the air in the mold body from being caught in the molded body,the mold should be considered to control the discharge port.On the ring-shaped product,the opposite side of the grid is prone to weld lines,so pay attention to the position of the grid.In order to optimize the injection molding conditions,it is necessary to rely on the temperature management of the mold,the barrel,etc.and the pressure sensor in the mold for detailed management.In addition,there should be a cooling groove on the mold,which can be cooled and heated.Relying on the temperature regulator to keep the mold temperature constant,it is very effective to improve the accuracy of the molded body.Due to the large amount of organic materials used in the raw materials,in order not to cause thermal cracking of the blank,degreasing without carbon residue is also an important issue.

Craftsmanship

The injection molding principle of alumina ceramics is basically the same as that of plastics.Only a large amount of ceramic powder is mixed in the plastic.In order to improve injection molding conditions,it is necessary to select organic materials that match the raw materials used,and to select the amount of addition.In order to obtain a dense and uniform injection molded body,the concentration of ceramic powder is higher.But too high will make the forming performance worse.In order to improve the fluidity of the mixed billet,the viscosity of the dispersant polymer system should be reduced.As a pretreatment,it is important to improve the dispersibility of the ceramic powder.In order to improve the fluidity of the polymer,it is necessary to add appropriate plasticizers and lubricants.

During the stirring process,the ceramic powder is wetted and covered by the binder,and all can be formed into a uniform compound before injection molding.And it needs cooling,drying and crushing to obtain particles suitable for feeding the injection molding machine hopper.