The room and pillar method mainly relies on the stability of the surrounding rock and the remaining pillars for ground pressure management. If stability is poor roof slate stone, rock top plate may be installed by the pole, to increase its stability, if the local instability, may leave some areas in these pillars. This mining method is therefore more flexible.
The pillars left by the room column method are initially continuous pillars (also called mines), and the pillars are generally not recovered, as permanent losses. Later, with the development of mining technology, the continuous pillar will be changed to a discontinuous pillar, which can improve the ore recovery rate.
Semi-automatic Blow Molding Machine
Performance characteristics of semi-automatic bottle blowing machine:
1. Adopt Mitsubishi computer control system of Japan, with high stability, fast operation and stable performance.
2. The infrared lamp is used for heating, with strong penetration, and the bottle preform is heated by rotation, uniform, fast and reliable.
3. Automatic pressure stabilization, automatic temperature regulation, and air cylinder are all equipped with Yadeke, SMC, and Doctor blow valves.
4. Each mechanical action is equipped with a safety self-locking device, which will automatically alarm in case of failure, and the program will automatically switch to the safe state.
5. Each action is driven by air source, with no pollution and low noise.
6. Adopt *'s air blowing system, independently designed, and the product quality is higher.
7. Adopt double-curved arm connecting rod to lock the mold, with large locking force and other advantages.
The semi-automatic bottle blowing machine produced by our company can blow any shape of carbonated beverage bottles, mineral water bottles, cosmetics bottles, large-diameter bottles, heat-resistant bottles and other packaging containers with 5000ml PET as raw material. The bottle output ranges from 500 bottles/hour to 1000 bottles/hour. Different specifications, configurations and structural designs can fully meet the needs of different foreign customers.
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Ningbo Chenwei Machinery Technology Co.,Ltd , https://www.chenweimachinery.com