What Is a Sand Mill?

Sand mill is currently the most widely applicable, most advanced and most efficient grinding equipment with the narrowest grinding cavity, the smallest gap between the levers, and the most dense grinding energy. With high-performance cooling systems and automatic control systems, continuous material The continuous discharge of processing greatly improves the production efficiency.

sanding machine

Sand mill is currently the most widely applicable, most advanced and most efficient grinding equipment with the narrowest grinding cavity, the smallest gap between the levers, and the most dense grinding energy. With high-performance cooling systems and automatic control systems, continuous material can be achieved. The continuous discharge of processing greatly improves the production efficiency.

Chinese name

sanding machine

Foreign name

sand mill

Overview

Also known as

Sand mill also known as

Sand mill belongs to wet ultrafine grinding equipment, which is developed from ball mill. Widely used for pigment dispersion and grinding during ink production. Sand mills are classified in different ways:
According to the structure and shape of the stirring shaft, it can be divided into disc type, rod type, and rod disc type (both convex type).
According to the arrangement of the grinding cylinder, it can be divided into vertical and horizontal.
According to the volume of the cylinder, it can be divided into laboratory, small, medium, large and super large.
According to the medium separation method, it can be divided into static and dynamic separation sand mills.
It can be divided into low / high energy density sand mills according to energy density (power installed per unit volume).
To produce different types of inks, the structure of the sand mill is also different. Probably follow the following rules: Generally, the production of gravure ink uses a pin ( 5-50 liters) or a disc sander ( 10-100 liters) . Rotary offset printing inks generally use a vertical rod type ( 5-130 liters) or a horizontal plate sander ( 60-500 liters), and the production of extra-high viscosity sheet paper inks often uses a high energy density cone sander or three Roller . Inkjet inks (ink and pigment solvent types) generally use high-energy-density pin-type (horizontal or vertical) and centrifugal turbine rotors (new patented products). ^[1]

Sander and

The sand mill adopts an eccentric disc grinding structure and is arranged in a certain order. This system overcomes the shortcomings of the uneven distribution of the grinding medium of the traditional grinding machine, so that the grinding medium can obtain the maximum energy transfer, and the grinding efficiency is high. Cooling mechanical seal, good sealing effect and reliable operation. The separation system uses a large flow LDC dynamic grid slot separator. Under high flow conditions, the discharge port will not be blocked. The flow area is up to a gap range of 0.05-2.0mm. Use 0.1mm or more

A multi-layer disc is mounted on a rotating main shaft in a horizontal sand mill barrel. When the spindle rotates, the grinding medium is rotating the disc

Stop for a long time, check before starting

development trend:

(1) Progress of the grinding media separation system

1. Grinding barrel material: In the sand mill industry, there are many manufacturers who grind barrels are mostly made of stainless steel. There are also many types of stainless steel materials, which need to be confirmed by the owner.

2. Material of grinding barrel rotor: In terms of the technology of the sand mill, there are mainly two types, one is a disc-type grinding disc, and the second is a pin-pin type grinding barrel and a pin-type rotor. The grinding effect of the pin-type sand mill is much more obvious than that of the disc sand mill.

3. Material and grinding meson (zirconium beads) separation device: In the horizontal sand mill, the separation device is mainly used when the material and the grinding medium are separated. The separation device is mainly composed of a static ring and a moving ring. .

4. Cooling effect of mechanical seal and equipment: whether there is leakage of mechanical seal, how many hours of service life. The key is to see that the mechanical seal circulating fluid uses a solvent or water that is compatible with the grinding material, which avoids the accident of contaminating the product during production and brings unnecessary economic losses.

5. Production efficiency: Whether the structural design is reasonable determines the production efficiency and product quality.

6. Operation: The main control part of the machine is very centralized and easy to operate.

7. Easy to change color, clean, and change the zirconium beads: mainly understand whether the grinding cavity has no dead angle design, and how well the self-cleaning effect is.

8. Complete safety protection functions: selection of complete mechanical and electrical materials, quality and safety, etc.

Use and maintenance of sand mill:

First, test run

1. Make preparations for the test run.

2. Check whether all parts are installed firmly.

3. The rotation direction of each machine should be in the direction indicated by the arrow (the test direction should be jogged).

4. Check if the cooling water is smooth.

5. The triangle belt adjustment is suitable for restarting. After 50 hours of work, adjust it again.

6. Add grinding media from the top of the barrel.

7. Start the feed pump first, input the materials and wait for the material to be discharged from the top screen before starting the host.

8. After stopping for a long time, when restarting, the disperser is often "stuck" due to the solid particles and grinding medium in the material settling, especially when the viscous materials are at a lower temperature. At this time, when the jogging motor cannot be started, the hand should be used on the main shaft pulley turning the car to input a small amount of solvent that has the ability to dissolve the material, so that the material can be dissolved and loosened before starting. In short, do not start forcibly, so as not to damage the electrical appliances and the body.

9, the parking time is long, the dry material should be cleaned.

10. Cleaning the disperser can only be rotated slightly and intermittently, because the disperser and the grinding medium run quickly in the cleaning liquid and are easily worn and broken.

11. When using a new grinding medium, it should be sieved to remove foreign matter such as broken fragments.

Failure

1. The feed pump does not start or stops during operation: A: Whether the power is on; B: Whether the fuse is blown.

2. The host cannot start or stop during work: A: Whether the fuse is blown; B: Whether the feeding pump is feeding; C: Whether the V-belt is too loose; D: Whether the diffuser is stuck.