Ball mill abrasive composition

1. Structural characteristics and working principle

Advantages: 1 mixing and dispersion at the same time; 2 operation is simple and convenient.

Disadvantages: difficulty in color change.

Four working states:

2. Grinding media

Steel ball, Al2O3, ZrO2

3. Quantity of charge

Paint increased by 5~10%

4. Composition and experimental determination of ball mill abrasives

The binder in the paint can actually be regarded as a dispersant to prevent flocculation of the pigment. The lowest amount of binder can achieve both the lowest viscosity and the highest pigment volume to meet the requirements of the dispersion stage.

The best abrasive composition can be obtained by Daniel's flow point measurement as follows:

(1) A paint having a solid content of 55% was diluted with a solvent into a resin solution of 10%, 15%, 20%, ..., 50% solid content.

(2) Accurately measure 20 g of pigment in a beaker, add the resin solution to the pigment, and stir with a glass rod to record the volume of the resin solution consumed when the Daniel flow point is reached.

(3) Plot the volume of the resin solution consumed for each resin solution concentration.

The lowest point of the flow point U curve corresponds to the optimum composition of the abrasive material obtained during dispersion.

5. Practical considerations for the composition of the abrasive

Daniel's flow point method is reliable and can achieve the highest grinding efficiency, but it is easy to have three problems in industrial production:

(1) Due to the low viscosity of the paint in the paint, the equipment wear is relatively obvious.

(2) The binder content in the millbase is too low, which may result in "solvent migration" and coarsening when further thinning.

(3) The feed pump is difficult to transport due to the thicker grouting paint containing pigment.

A resin concentration slightly higher than the lowest flow point can be used in actual production.

High Speed Blow Moulding Machine

Features of main machine :

1). Stable performance with advanced PLC.
2). Automatic preform conveyer to save human cost.
3). Preform self-rotation and infrared pre-heater revolution assure the even distribution of heat, which improve the bottle shaping rate, increase the production.
4). High adjusting performance to enable preheat the preforms perfectly by adjust the voltage control area in the PLC, which could adjust the temperature of the infrared lights in the pre-heater, and keep the proper temperature and humidity invariable.
5). High safeties with security automatic-locking device in each mechanical action, which will make the production into a perfect safe environment, in case of the breakdown in certain procedure.
6). Introduce the FESTO air cylinder to avoid contamination and noise.
7). Satisfaction with different atmospheric pressure for blowing and mechanical action by dividing the blowing and action into three parts in the air pressure diagram of the machine.
8). Strong clamping force with high pressure and double crank links to lock the mould.
9). Two ways of operating: automatic and manual.
10). Low cost,high efficiency,easy operation and maintenance etc, profited from the fully automatic technological process.
11). Ideal cooling system make the finished bottles without any flaws.

High Speed Blow Moulding Machine, PET Bottle Making Machine, Blow Moulding Machie

TAIZHOU WATON MACHINERY CO LTD , https://www.watonblowing.com