In order to improve rock drilling efficiency, reduce or timely discover faults during rock drilling, the following operational principles should be followed:
First, the eye position must be accurate, the direction of the eye should be cold, and the angle of the air leg should be accurate;
Second, the drill rod and the rock drill to be held in a straight line;
Third, the rock drill , gas leg (or propulsion device) should work smoothly;
Fourth, change the rock drilling position, change the air leg erection angle and replace the drill rod;
5. Concentration of ideas, concentration of energy, and concentration of time;
Sixth, look at the blasthole eye is round, diligently see whether the drill rod is turned in the center of the blasthole, diligently see if the discharged rock powder is normal, and see if the rock drill is working normally;
7. Listen carefully to the operation sound of the rock drill, determine whether the shaft thrust, wind pressure and lubrication are normal, listen to the sound of the hole, and determine whether it encounters faults and joints.
8. Regularly adjust the amount of water, air volume and air leg angle.
Injection molding is a molding method that combines injection and molding. The advantages of injection molding method are fast production speed, high efficiency, operation can be automated, variety of colors, shapes can be from simple to complex, size can be from large to small, and the size of the product is accurate, and the product is easy to update. And injection molding is suitable for mass production and complex shape products, such as the field of molding processing.
At a certain temperature, through the screw stirring completely molten plastic material, with high pressure into the mold cavity, after cooling and curing, to get the method of molding products. This method is suitable for mass production of parts with complex shapes and is one of the important processing methods.
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