Tianyuan Sand Roller

NEWS CENTER

Company News

21

2020-07

Reference service life of the sand roller

Release time：2020-07-21 09:19

The service life of a sand roller depends on a range of factors, including the condition of the rice mill, the characteristics of the sand roller itself, the type and variety of brown rice, its moisture content, the milling process, and the operator’s skill level. The reference service life of a sand roller is expressed in terms of the amount of rice milled, as follows (for single‑machine white‑rice production with standard processing accuracy): Milling tonnage = K × S × 1500 Notes: 1. The coefficient K is a reference value, typically ranging from 1 to 2. 2. S represents the effective grinding surface area of the sand roller, in square meters.

21

2020-07

Replacement and Protection of Sand Rollers

Release time：2020-07-21 09:19

After a period of use, both the rice‑milling output and precision of the sand rollers will decline—this is a normal occurrence. If output decreases, when conditions permit, you can remove the sand rollers and use a handheld grinding wheel to resurface the helical grooves; in most cases, production will then return to normal. For reduced precision, you can increase the pressure on the pressure bar or adjust the rice‑cutting blade to address the issue. Before replacing the sand rollers, carefully inspect other components in the whitening chamber—such as the helical conveyor and the rice‑diverting device—to ensure they are functioning properly; otherwise, even after replacing the rollers, the results may still be subpar. Sand rollers are fragile items; handle them with care during transport to avoid dropping, impact, or rolling. When storing, protect them from moisture, freezing, and excessive heat, and keep them away from acids, alkalis, or…

21

2020-07

Selection of Sand Rollers

Release time：2020-07-21 09:18

The performance and durability of sand rollers depend on a range of factors, including the condition of the rice mill, the characteristics of the sand rollers themselves, the type and variety of brown rice, its moisture content, the milling process, and the operator’s skill level. When milling does not meet expectations, consider selecting a more suitable sand roller according to the following guidelines (focusing solely on the sand roller in addressing the specific issue at hand): 1. If the sand roller’s service life is unsatisfactory: ⑴ Try using a sand roller with higher hardness. ⑵ Try using a sand roller with a finer grit size.

21

2020-07

Selection of Rice Milling Sand Rollers

Release time：2020-07-21 09:17

Rice milling is a processing operation in which rotating mill rollers induce collisions, friction, and tumbling between rice grains and the components of the milling chamber, as well as among the grains themselves. Through grinding and friction‑induced abrasion, the outer layers of the rice grains are removed—either partially or entirely—producing milled rice that meets specified quality standards. Depending on the material of the mill rollers, commonly used rice mills can be broadly classified into two structural types: sand‑roller mills and iron‑roller mills. Compared with iron‑roller mills, sand‑roller mills deliver gentler impacts, tumbling, and grinding actions, resulting in lower broken‑rice rates, reduced energy consumption, higher yields, and greater production efficiency. Consequently, sand‑roller mills are currently the most widely adopted equipment in rice‑processing enterprises.

21

2020-07

The working principle of a rice mill

Release time：2020-07-21 09:13

The operating principle of a rice mill is a complex process that requires consulting specialized technical literature for a thorough understanding. Simply put, brown rice passes through the milling chamber, where internal pressure, the rotation of steel or sand rollers, and air‑blowing from a fan work together to create ample friction and abrasion between rice grains, between the grains and the sieve plates, and between the grains and the rollers. This process removes the outer bran layer and slightly moistens the grains, resulting in a smooth, lustrous finish.

21

2020-07

Abrasive belt deviation

Release time：2020-07-21 09:11

This is typically caused by improper adjustments. Under normal conditions, the abrasive belt should oscillate with an amplitude of 15–20 mm and a frequency of 15–20 cycles per minute, at a moderate speed, with consistent forward and return strokes. If operating outside these parameters, prolonged use may lead to belt misalignment, particularly when the forward and return speeds are uneven. Belt deviation can result from a malfunctioning photoelectric sensor, a faulty oscillation valve, or damage to the oscillation cylinder. Inadequate dust extraction and high dust concentrations can impair the sensor’s proper operation and also contribute to belt misalignment.

21

2020-07

Abrasive belt breakage

Release time：2020-07-21 09:11

Belt breakage is primarily caused by belt misalignment, failure to replace a dull belt in a timely manner, excessive grinding load, contact with hard objects during operation, or defects in the belt itself. Belt breakage should be avoided whenever possible, as it may lead to fire or explosion. When the current of the sanding roller on the machine table becomes abnormal, check whether the abrasive belt has become worn; if so, replace it promptly.

21

2020-07

Abrasive belt wrinkling

Release time：2020-07-21 09:10

Once a sanding belt becomes wrinkled, it can no longer be used. Generally, there are three possible causes of belt wrinkling: First, the sanding roller and the tension roller are not parallel in their vertical projection; shims should be added at the central support cylinder to correct this alignment. Second, moisture absorption softens the belt, leading to wrinkling; drying or sun‑drying methods can be employed. Third, if the sander is left unused for an extended period, the roller surface may rust and become rough, making belt oscillation difficult and causing wrinkling; in such cases, the rollers should be de‑rusted or lightly polished with fine‑grit sandpaper.

< 12 >

Cookie

Our website uses cookies and similar technologies to personalize the advertising shown to you and to help you get the best experience on our website. For more information, see our Privacy & Cookie Policy

Cookie

Our website uses cookies and similar technologies to personalize the advertising shown to you and to help you get the best experience on our website. For more information, see our Privacy & Cookie Policy

These cookies are necessary for basic functions such as payment. Standard cookies cannot be turned off and do not store any of your information.

These cookies collect information, such as how many people are using our site or which pages are popular, to help us improve the customer experience. Turning these cookies off will mean we can't collect information to improve your experience.

These cookies enable the website to provide enhanced functionality and personalization. They may be set by us or by third-party providers whose services we have added to our pages. If you do not allow these cookies, some or all of these services may not function properly.

These cookies help us understand what you are interested in so that we can show you relevant advertising on other websites. Turning these cookies off will mean we are unable to show you any personalized advertising.