The square bottom valve bag making machine can be used to make valve pockets of various materials such as paper valve pockets, plastic woven heat sealing valve pockets, multi-layer kraft paper bag making machines, etc. The gluing process is used for bonding to present a square shape. The heat sealing process and principle of the square bottom […]
The most important function of packaging is to protect the quality of all packaged goods, that is, to ensure that the goods will not be damaged, lost, leaked and spoiled. This requires that the seal must have a certain strength and sealing performance in the process of bag making, and can withstand the pressure of […]
In recent years, with the continuous development of my country’s calcium hydroxide market, the technical indicators of calcium hydroxide products are also constantly improving. The traditional calcium hydroxide production process and the inability to meet market demand and technical indicators have been gradually replaced by calcium hydroxide equipment. Everyone has a lot of doubts about […]
Users who purchase calcium hydroxide equipment production lines usually consult in detail about what standard the calcium hydroxide produced by calcium hydroxide equipment can meet, and purchase corresponding supporting production lines according to their own goals. At present, the calcium hydroxide powder produced by domestic calcium hydroxide equipment can reach industrial grade use, the fineness is generally […]
There are many kinds of desk and chair sets on the market, the price difference is large, and the quality is also uneven. If you choose cheap ones, the quality cannot be guaranteed. There are many factors that affect the quality. If you want to buy good quality products , we must first understand the factors that […]
For students, they naturally hope to use new desks and chairs, but such frequent replacement of new desks and chairs will increase financial expenditures for schools. Besides, steel and wood desks and chairs are of reliable quality and long service life. Longer, regular maintenance can avoid the waste caused by repurchasing new desks and chairs. […]
The slewing bearing is an important “joint” of the crane, so its maintenance is very important. So how to maintain the slewing bearing of the crane? When carrying out maintenance work on the slewing bearing of the crane, first of all, pay attention to the danger of being dragged into the slewing pinion, crushing and shearing. […]
The slewing bearing is an indispensable part of the excavator slewing device. Whether the excavator can turn left or right during work is inseparable from the credit of the slewing bearing. The slewing bearing is mainly used to support the quality of the upper body and bear the working load. Due to the heavy load […]
All machines will experience wear and tear after a long period of use. When the parts exceed the service life or are damaged beyond repair, they should be scrapped and replaced. The tower crane slewing bearing is prone to failure and damage in the long-term outdoor harsh environment and high-load operation, so to what extent does it […]
Is the surface roughness of the slewing bearing as small as possible? Surface roughness refers to the small spacing and the unevenness of small peaks and valleys that the machined surface has. The roughness of the bearing surface may affect the wear resistance, stability, fatigue strength, stability and other properties of the bearing. Generally speaking, the smaller […]