Professional Custom Lamp Holder Accessories Manufacturer

Porcelain lamp holders producting process: Alumina powder into the plant in accordance with the requirements from different products with different molding process into a powder material was prepared. Particle size below 1μm microns

The manufacture of high purity alumina ceramics in addition to alumina purity to 99.99%, the need ultra-fine grinding and make it uniform particle size distribution. Use Extrusion molding or injection molding, powder introduction of binder and plasticizer, generally the weight ratio of 10-30% of a thermoplastic plastic or tree.

Grease? Organic binder and alumina powder in 150-200 temperatures were uniformly mixed, in order to facilitate the molding operation. Hot press molding process

Powder materials without adding a binder. The use of semi-automatic or fully automatic dry pressing, the powder with special technical requirements, the need to adopt

Powders by spray granulation method, it presents a spherical shape, in order to facilitate ease of molding automatically filling the mold wall to improve the powder flowability. In addition, to reduce the powder and die wall friction, the need to add 1 to 2% of a lubricant such as stearic acid, and the binder PVA.
For dry pressing the powder spray granulation, including the introduction of polyvinyl alcohol as a binder. In recent years, a research institute in Shanghai to develop a water

Insoluble paraffin as Al203 spray granulation binder, good mobility in the heating case. The powder must have spray granulation

Liquidity, loose density, the flow angle friction temperature is less than 30 ° C. Particle size ratio of ideal conditions in order to obtain a larger green density.
Forming method
Alumina ceramic molding methods dry pressing, slip casting, extrusion, cold isostatic pressing, injection, casting, hot pressing and hot isostatic pressing, etc., etc. Multi-

Ways. In recent years, at home and abroad to develop a filter press molding, Direct Coagulation Casting gel injection molding, centrifugal slip casting and solid

Free body molding method of molding technology. Type of product shapes, sizes, and require a different method of forming complex shapes and precision products

.
Lamp holders common molding introduced:
Dry molding: alumina ceramic dry pressing technology is limited to a simple shape and wall thickness of more than 1mm, the ratio of length to diameter

The object of the 4:1. The molding method uniaxial or bi-directional. Press hydraulic, mechanical two, was a semi-automatic or fully automatic molding

Way. The maximum pressure of the press as 200MPa. Yield up to 15 to 50 per minute. Uniform pressure hydraulic press stroke, so the powder

Suppression of material filled with different pieces of different heights. Mechanical presses the size of the pressure is applied powder filling, easily lead to sintering

Dimensions contraction differences affect product quality. Dry-pressed powder particles uniformly distributed is very important for mold filling. Charge

Fill the accuracy of manufacture of alumina ceramic parts dimensional accuracy control. Powder particles greater than 60 M, ranging from 60 to

Between 200 mesh will be the largest free-flowing effect, obtaining best pressure molding effect.
2, slip casting method: slip casting is the the alumina ceramic earliest molding method. As a result of the plaster mold, low cost and ease of molding

Large size, shape complex parts. The CASTING key alumina slurry preparation. Usually water flux medium, and then adding Solutions

Glue and binder full after grinding exhaust, then pour into the plaster mold. Cast capillary moisture adsorption, slurry

Then cured in the mold. Hollow grouting, the die wall adsorption slurry up to the required thickness needed, the excess slurry is poured. In order to reduce the body to close

Shrinkage, make full use of the high concentration slurry.
Alumina ceramic slurry was added to the organic additives needed to make the surface of the slurry particles to form an electric double layer so that the stability of the slurry suspension does not precipitate. In addition

Gum arabic, and other dispersants, aimed at the need to join the vinyl alcohol, methyl cellulose, alginic acid amines, such as binders and polyacrylamide,The slurry suitable for slip casting operation.