JPS6064639A - Crushing of building aggregate material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for grinding concrete aggregates such as gravel stone and crushed stone, or for crushing pumice, clay lumps (hereinafter referred to as soft stones) mixed with aggregates.

BACKGROUND ART Conventionally, it has been important to polish the sharp edges of aggregate or remove soft stone in order to improve the workability during concrete pouring and to obtain concrete with high gH. However, in the past, the equipment was expensive, difficult to maintain, and had poor polishing effects.

Therefore, an object of the present invention is to provide a method that is simple, has good effects, and can reduce equipment costs. The present invention will be described in detail, but first, the device used will be explained. In Fig. 1, 1 is a grinding cylinder, and one wall 1a is movable by a toggle crank mechanism 2 with an axis K at the upper end as a fulcrum. The structure is as follows. The f:ji
Inside 1, one wall 1a is inclined so that the upper end is wide open as an input section for aggregate, and the discharge opening 1b at the lower end is narrow. However, the inside of the cylinder is wide enough to accommodate two or more pieces of aggregate even at its narrowest point (in this example, the opening at the bottom). 6 is a discharge guide cylinder with grinding material T, "j
It is installed so that it can communicate with the lower end opening of 1. An aggregate support plate 4 is arranged below the guide tube 4, which swings laterally.

Next, to explain the method of this example, firstly, with the previously ground aggregate left in the guide tube B, the aggregate S is introduced from the upper end of the grinding tube 1 and filled, so that the lower end of the reservoir tube 1 is filled. Prevent the aggregate from falling suddenly from the discharge opening 1b. If the wall portion 1a is moved in this state, the wall portion 1a will come into contact with the aggregate S and move the aggregate S. This causes the aggregates S to rub against each other.

If they bump into each other, they will get into a scuffle (Figure 2).

(See Figure 3). At this time, the mutual kneading of the aggregates takes place strongly at the bottom of the grinding tube 1, and since m1 is vertical, the weight of the aggregate S from above makes the kneading between the aggregates strong. . Through this mutual kneading of aggregates, aggregate S
The acute angle portion Sa is polished or crushed. Soft stone is also crushed by hard aggregate. Therefore, by swinging the receiving plate 4 laterally, the polished aggregate S' is gradually discharged. At this time, crushed particles of soft stone and crushed sharp edges also fall. Incidentally, as shown in FIG. 4, a shielding plate 5 may be movably arranged at the lower end discharge portion of the grinding cylinder to intermittently discharge the aggregate. Further, regardless of the shape of the grinding tube or the movable structure of the wall portion, it may be made into an annular grinding tube by housing and arranging a rotating cone body 6 in the cylinder as shown in FIG. Further, the movable state of the wall portions is arbitrary, and if both opposing wall portions of the polishing tube are simultaneously moved in opposite directions as shown in FIG. 6, the kneading of the aggregate becomes stronger and it is even more effective. In short, the present invention arranges a grinding cylinder containing aggregates vertically, and makes the inside of the cylinder wide enough to accommodate two or more pieces of aggregate in parallel. This is a method in which the aggregates charged into the cylinder from above are kneaded together.

Therefore, according to the present invention, the aggregates rub against each other and collide with each other, resulting in a jostling state, and the weight of the laminated aggregates introduced from above [71] makes the mutual kneading of the equipment even stronger, and the bones are crushed. The polishing of 4'A becomes good, and the effect of reliably crushing and removing the stones is great.

[Brief explanation of the drawing]

The drawings are for explaining the present invention, and FIG. 1 is a front view of the device, FIG. 2 is a longitudinal sectional view thereof, FIG. 6 is a sectional view taken along line A-A in FIG. 2, and FIG. FIG. 5 is a longitudinal sectional view showing another example of the grinding ore cylinder, and FIG. 6 is a cross-sectional view showing another example of movable wall portions. 1: Grinding cylinder, 1a: Wall, 1b: Discharge opening.

Claims (2)

[Claims] (1) A grinding cylinder containing aggregate is arranged vertically, and the inside of the cylinder is wide enough to accommodate two or more pieces of aggregate in parallel, and the walls forming the grinding cylinder are movable. Polished ore and soft stone for construction aggregates characterized by grinding the sharp edges of the aggregate or crushing the soft stone contained in the aggregate by kneading the aggregates charged into a cylinder from the beginning. How to grind. (2) A method for crushing ground ore and soft stone for constructional bone recyclables according to claim 1, in which the walls of opposing grinding cylinders are simultaneously moved in opposite directions to knead the aggregate.