JPS5855959Y2 - Styrofoam crushing equipment - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a crushing device for expanded polystyrene.

Conventionally, as this type of crushing device, one shown in FIG. 1 is known.

This is equipped with a rotating blade 1 and a fixed blade 2 having knife-shaped cutting edges 1a and 2a at the tip, and the rotating blade 1 has both cutting edges 1a and 2a.
The cutting blades 1a and 2a are configured to rotate while maintaining a constant gap 3 between the cutting blades 1a and 2a, and the styrene foam is cut by the cutting blades 1a and 2a.

However, in such conventional crushing equipment, the polystyrene foam is first cut into long strips along the cutting edges 1a and 2a, and then cut into a predetermined size by cutting the styrofoam several times while changing the direction horizontally or diagonally. Since the grains are cut one after another, it takes a long time to grind, and the efficiency is very low.

The present invention was developed with the aim of eliminating the above-mentioned drawbacks of the conventional technology, and its feature is that it has a very simple structure and can efficiently crush Styrofoam in an extremely short period of time. It is.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings. In FIGS. 2 to 4, 10 is a main body of a pulverized styrofoam body, and inside the main body 10 is a raw material input port. 12 and a grinding chamber 11 having an outlet 13;
A primary crusher 14 and a secondary crusher 15 are disposed above and below within the crushing chamber 11.

The primary crushing device 14 is for crushing a lump of polystyrene foam into large particles, and has a large number of fixed blades 17 a and 17 b provided with coarse serrated cutting edges 18 on the upper and lower edges of the main body 10 . are installed in parallel at a constant interval a on the left and right inner walls of the
A cylindrical rotating shaft 19 whose axis is parallel to the two opposing fixed blade groups 16a and 16b is provided in the center, and adjacent fixed blade groups 17a and 17a are arranged on the rotating shaft 19.
A large number of rotary blades 20 passing between the blades 17b and 17b are attached in a spiral manner, and a rough groove is provided on the side edge of each rotary blade 20 on the side in the direction of rotation facing the cutting edge portion 18 of the fixed blades 17a and 17b. A serrated cutting edge 21 is formed so that when the rotary blade 20 passes between the fixed blades, the styrofoam is crushed by the cutting edges 18 and 21.

The particle size at this time varies depending on the distance a between the fixed blades 17 a and 17 b and the roughness of the serrated cutting edge portions 18.21.

The opposing fixed blades 17a and 17b may have the same structure and be fixed upside down, and the rotating shaft 19
are installed so that no more than necessary gap is formed between the fixed blades 17a and 17b.

The secondary pulverizer 15 is for pulverizing the expanded polystyrene that has been pulverized into large particles by the secondary pulverizer 14 into finer particles. It is equipped with a large number of fixed blades 22a and 22b and a rotary blade 24 mounted on a rotating shaft 23,
Unlike the primary crushing device 14, the rotary blade 24 has a rotary shaft 2
The cutting edges 25 and 26 of the fixed blades 22a, 22-b and the rotary blade 24 are formed into fine serrations, and the cutting edges 25 and 26 between the fixed blades The spacing is set narrowly.

The arrangement of the rotary blades in the secondary crushing device 14 and the secondary crushing device 15 is set in consideration of the magnitude of the load acting on the rotary blades during crushing.

That is, in the primary crushing device 14 that crushes large chunks of Styrofoam, a very large load is applied to the rotary blades 20, so it is necessary to concentrate the driving force on a small number of rotating forces to ensure reliable crushing. Although the rotary blades 24 are arranged in a spiral shape, the rotary blades 24 are installed in a straight line in the secondary crushing device 15 because the load is not so large.

However, depending on the driving force, the rotary blades 20 and 24 can be arranged in a spiral shape or conversely in a straight line.

Now, when foamed polystyrene is introduced from the raw material input port 12, in the primary crushing device 14, the rotating blade 20, which is rotating at high speed together with the rotating shaft 19, passes through the fixed blade 17a.
, 17a, it is crushed by the cutting edges 18 and 21 into a size corresponding to the distance a, and at the same time is crushed into a large number of large-diameter particles by the biting of the serrations, It passes through the above-mentioned interval a and falls onto the secondary crushing device 15.

Some of the fallen particles are caught up in the rotating blades that are rotating at high speed, and are crushed again when they pass between the fixed blades 17 b and 17 b on the opposite side.

The large particles that have fallen onto the secondary crusher 15 are subjected to a similar crushing action by the fixed blades 22a, 22b and the rotary blade 24, and are further crushed into finer particles, which fall downward and exit from the discharge port 13. be discharged.

The sizes of the large particles and small particles described above are based on the fixed blade 17a.
, 17b and 22a, 22b (7) can be changed by changing the adjacent spacing a and b.

The illustrated crusher has a primary crusher 14 and a secondary crusher 15 installed in the same crushing chamber 11 in two stages, upper and lower, but one of them may be omitted or a separate crusher may be provided. It is also possible to arrange each device 14, 15 independently.

According to the crushing device of the present invention having the above configuration, the rotating blade is configured to pass through the adjacent space between the fixed blades arranged in parallel at regular intervals, and the serrated cutting edge portions are arranged opposite to the fixed blades and the rotating blades. Since the rotary blade passes between the fixed blades, it crushes the polystyrene foam into a size that corresponds to the distance between the fixed blades, and at the same time crushes the polystyrene foam into a large number of particles at once by biting into the serrated portion each month. However, the fixed blades arranged in a comb-like manner at narrow intervals act as a sieve, allowing only particles crushed to a certain size to fall between them. There is no need to stretch a wire mesh or the like, and the structure can be greatly simplified.

[Brief explanation of the drawing]

FIG. 1 is a partial side sectional view of a conventional crushing device, FIG. 2 is a sectional view showing an embodiment of the present invention, and FIGS. 3 and 4 are plan views of essential parts thereof. 16 a, 16 b --- Fixed blade group, 17 a
, 17 b , 22 a , 22 b . . . Fixed blade, 18, 21.25.26 . . . Cutting blade portion, 19
．． 23... Rotating shaft, 20.24... Rotating blade.

Claims (1)

[Scope of utility model registration request] A large number of fixed blades with serrated cutting edges are arranged horizontally at regular intervals on the inner wall of the crushing chamber, and a large number of fixed blades passing between adjacent fixed blades are arranged on a rotating shaft arranged parallel to the group of these fixed blades. A pulverizing device for styrofoam, characterized in that rotating blades are installed at regular intervals in the axial direction, and each rotating blade is provided with a serrated cutting edge that faces the cutting edge of the fixed blade.