JPS6125879Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a crusher for plastic materials.

Conventionally, crushers used in plastic molding plants to crush defective spool runners and other various plastic materials produced by plastic molding machines have been of horizontal design. That is, a rotating cutter is fixed on a horizontal axis, and the rotation of the horizontal axis causes shearing of the plastic material between it and the fixed cutter (this cutter does not actually have an upper blade shape) fixed to the inner wall of the housing. was carried out. In such a structure, if you want to shear the largest possible piece of material, the distance between the outer periphery of the rotating cutter and the housing must be increased (i.e., a rotating blade with a large rotation radius is required). The drawback was that plastic debris accumulated on the top surface of the grinder, reducing the grinding performance of the grinder.

The present invention eliminates these drawbacks and provides a pulverizer with improved pulverizing performance.

According to the invention, the disadvantages of the prior art are overcome by vertically arranging the cutter shaft of the grinder.

Embodiments of the present invention will be described based on the drawings.

In FIG. 1, a cylindrical housing 3 is fitted inside the main body frame 2, and a fixed blade 4 is inserted into the housing 3 through a slit 3a in the side wall of the housing 3. is fixed by a bolt 6 to a holder 5 fixed to the machine frame 1 below the housing 3, and an adjusting screw 7
The amount of protrusion into the housing 3 can be adjusted by this.

A jamb plate 8 is fixed to the inner surface of the upper portion of the housing 3. The barrier board 8 has a downward receiving surface to prevent plastic debris from flying up, and acts so that the plastic debris is bounced back by the barrier board 8 and falls downward.

The side wall of the housing 3 is provided with a number of small holes 3b for evacuation of plastic chips. As shown in Fig. 2, the fixed blade 4 has separate blades 4a and 4b separated into upper and lower stages (by installing the blades 4a and 4b at different positions by 60 degrees, the timing of crushing and crushing is shifted, reducing the load on the electric motor. ). Due to the double arrangement of the cutters, the upper blade crushes and the lower blade crushes. The holder 5 is supported on a machine frame 2, and the machine frame 2 is supported on a pedestal 9 fixed to the upper surface of the machine frame 1 and fixed with bolts.

A coupling 10 passes through the center of the machine frame 1 and is connected to a drive shaft (not labeled) from below the machine.
A rotating shaft 11 extends through b and 10a.
The rotating shaft 11 is rotatably supported by a bearing set 14 in a sleeve 12 fixed to the machine frame 2 by bolts and nuts 13. A desk 15 is fixed to the rotating shaft 11 and forms a rotatable bottom of the housing 3 over the height of the lower edge of the fixed blade 4. Rotary blades 17a and 17b are further fixed to the rotating shaft 11 at positions corresponding to the fixed blades 4a and 4b via respective bosses 16a and 16b.

A hopper 18 as shown in FIG. 3 is placed above the housing 2 and connected by a flange 19. The hopper 18 is pivotally supported on its side wall, has a weight 20 attached to one end, and is provided with a see-saw type valve 21 for opening and closing the input opening when plastic material is input (FIG. 3).

According to the crusher according to the present invention, a block can have a maximum size of 20 mm on a side, a flat plate can have a maximum size of 2 mm x 100 mm x 50 mm,
The spool runner allows the crushing of plastic materials up to 10 mm x 10 mm x 150 mm.

In the present invention, the cutting edges of the rotary blade 17 rotating in the direction of the arrow 22 and the fixed blade 4, which simultaneously participate in shearing, gradually shift to a larger radius with respect to the rotating axis in a dotted manner, thereby increasing the strength of the plastic material. In the upper stage, the plastic debris recoils in the housing is bounced back downwards of the housing by the chopping board 8, so that fragmentation occurs in the upper stage.
In the lower stage, pulverization is carried out, and since the housing is arranged vertically, debris does not accumulate on the fixed blade 4, and other effects can be obtained.

In addition, since the device according to the present invention is installed very close to the plastic molding machine, the plastic materials such as spool runners immediately after coming out of the machine are crushed, so when the materials are recovered and reused, they are mixed with other materials. This provides the advantage that the risk of dripping or deterioration is prevented.

[Brief explanation of the drawing]

Figure 1 is a top view of the crusher according to the present invention, Figure 2 is a sectional view of the crusher shown in Figure 1 taken along the - line in Figure 1, and Figure 3 is a top view of the crusher according to the present invention. FIG. Symbols in the figure, 3...Housing, 4...Fixed blade,
4a... Upper fixed blade, 4b... Lower fixed blade,
11... Rotating shaft, 17... Rotating blade, 17a... Upper rotating blade, 17b... Lower rotating blade.

Claims (1)

[Claims for Utility Model Registration] (1) The housing 3 is oriented perpendicularly to the floor, and the housing 3 extends inward from the side wall of the housing 3.
Fixed blade 4 at a constant angle to the radius line of
protrudes, and a rotary blade 17 is fixed to the rotating shaft 11 at the center of the housing 3 in correspondence with the fixed blade 4. Plural pairs of blades 4 and 17 are arranged above and below; The cutting edges of the blade 4a and the rotary blade 17a increase in radial distance from the axis of the rotating shaft 11 as they move upward, and the cutting edges of the lower fixed blade 4b and the rotating blade 17b increase in radius as they move downward. A plastic material crusher characterized in that the radial distance from the center axis of the rotating shaft 11 is increased, and the cutting edge portions of the fixed blade 4 and the rotary blade 17 that participate in shearing at the same time change in a dotted manner. (2) A pulverizer for plastic materials according to claim 1, wherein the housing 2 has a zigzag plate 8 fixed to its inner surface in the upper region. (3) The plastic material crusher according to claim 1 or 2, wherein the bottom plate 15 of the housing 3 is formed as a rotating disk fixed to the rotating shaft 11. (4) Utility model registration claims 1 to 3, in which the hopper 18 placed on the housing 2 is equipped with a valve 21 that operates in a see-saw manner to open and close the material dropping opening when material is introduced. A crusher for plastic materials as described in any one of the preceding paragraphs.