Perforation blasting, mining, transportation, earth dumping, drainage, and recessed ventilation
1. Perforated blasting equipment:
200～380mm roller drill, 100～250mm down-the-hole drill, rock drill ; Mine explosive: select the corresponding explosive according to the nature of the rock and environmental conditions; Hole network parameters: good effect, less money, hole spacing, row spacing, dose , detonation sequence, explosion pile; wear location: according to the location specified by the mining plan construction, is an important factor to adjust the stripping ratio;
2, mining work equipment:
Electric shovel (19m3), hydraulic shovel, backhoe, front loading machine, auxiliary equipment; working surface parameters: step height, length of mining area, mining width, working flat width, slope angle, sloping angle, production stripping ratio, Finally, the slope angle and slope are stable;
3. Mineral rock transportation and transportation tasks:
Ore from the face to the processing plant, from the rock face to the dump; mode of transport: motor transport, railway transport, tape transport, combined transport; continuous, intermittent; transport equipment: mining trucks (200t), electric wheel ( 350t), locomotive, mine car, tape (coarse crush); related work: road design, railway and station design;
4. Dumping work:
Transporting the stripped material to a dedicated site for safe disposal is one of the main production processes for open pit mining. If the dumping space is insufficient, it will hinder the continuous production of the mine. Dumping methods: car transport dumping, railway transport dumping, tape strip Earthmoving excavation; Dumping site construction: effective use of volume, slope stability, covering soil and land;
5, the danger of water leakage and drainage:
Equipment efficiency is low, engineering progress is slow, and slope is destabilized; water inrush factors: surface water, rock water, water in fracture zone, water in waste pit, unsealed; anti-discharge method: intercepting ditch, river retaining bank River diversion, shaft dewatering, gravity/concentrated drainage.
The main function of the edge banding is to seal the cross-section of the board, so as to avoid the damage of the board and the adverse factors (mainly moisture) in the process of use and prevent the formaldehyde inside the board from volatilizing, and at the same time achieve the effect of beautiful decoration.
The product has the following main features: smooth surface, no blistering, no ribbing, moderate gloss, smooth surface and back surface, uniform thickness, uniform width, reasonable hardness, high elasticity, good quality, strong wear resistance, trimmed and sealed The color of the side and the side is close to the surface color, not whitish, good gloss, and the overall color of the finished furniture is coordinated.
Judge good or bad
1. Look at the hue and surface roughness of the edge banding strip. The color of the surface of a good edge banding strip is also very important. Whether the color is close to the customized product and is gorgeous. If the surface is very rough and there are pull marks, the quality is definitely not much better. This is the surface quality of the edge banding strip. It has nothing to do with the quality of the inner material of the edge banding, mainly the production process of the edge banding factory and the production technical skills of the employees. A good edge banding strip is: the surface must be smooth, no blistering or seldom bubbling, no drawing or few drawing, moderate gloss, not too shiny or too matte (unless there are special requirements).
2. Check the flatness of the surface and bottom of the edge banding and whether the thickness is uniform, otherwise it will cause the joint between the edge band and the board, the glue line is too eye-catching or the gap between the board and the edge band is too large, which will affect the overall beauty. Details determine success or failure, and often a small detail problem may bring an embarrassing situation where the overall effect is not good.
3. Whether the edge trimming is whitish, whether the surface of the bent edge strip is severely whitish, and whether the ground color of the trimming strip is close to the surface color of the board in question. PVC Edge Banding strips are mainly made of PVC and Calcium Carbonate plus additives. If the calcium carbonate content is too high, whitening of the edge banding and bending will occur, which proves that the quality of such products is not good.
4. Whether the strength is okay and whether there is elasticity. High strength means good wear resistance, and the corresponding quality is better. Too high strength also means increased processing difficulty. Low elasticity means low wear resistance and low aging resistance. In addition, according to actual production needs, manual trimming is generally required, and soft spots can be made appropriately, and the automatic edge banding machine can make hard points appropriately.
5. Whether the adhesive is applied evenly and whether it is easy to fall off during use.
6. Smell whether the PVC edge banding strips taste or not. Products produced with good quality raw materials generally have a small taste. If the taste is too large, it means that the quality of the raw materials used in production is relatively poor.
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Henan Shunbang Chemical Industry CO.,Ltd , https://www.pvcresinchem.com