JP2001190978A - Crusher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the uniformity of particle sizes after crushing in a crusher by reducing the range of variation in the pushing force acting on a work being an object to be crushed and on a rotary blade. SOLUTION: The rotary blade 1 has a cylindrical shape and a large number of cutting blades each comprising carbide tool are arranged on the circumferential surface of the blade 1. A feed cylinder 2 turns the forward end to the outer periphery of the blade 1, and the cylinder 2 is disposed, with its forward end side being inclined downward, thereby leading a work 10 toward the blade 1. On the side surface of the cylinder 2, an opening 6 is provided so as to be directed upward, and a hopper 3 is connected onto the opening 6. A sluice value 8 is inclinable in the vertical direction around a hinge joint 7 provided at the rear of the opening 6. A plunger 4 is received in the cylinder 2. When the plunger 4 is positioned at a retracted limit, the valve 8 is tilted downward and the opening 6 is opened. If the plunger 4 is advanced from the retracted limit, the plunger 4 makes contact with the rear side of the valve 8 to tilt it upward so that the opening 6 is closed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crusher for finely crushing plastic waste and the like.

[0002]

2. Description of the Related Art FIG. 3 shows an example of a conventional crusher using a cylindrical rotary blade.

[0003] The rotary blade 1 has a cylindrical shape, and a large number of cutting blades made of super-hard tools are arranged on the outer peripheral surface thereof. A large number of cutting blades made of quality tools are arranged. The supply cylinder 2 is arranged with its tip end facing the outer peripheral surface of the rotary blade 1, and guides the workpiece 10 to be crushed toward the rotary blade 1. The hopper 3 is connected to the opening 6 provided on the side surface of the supply cylinder 2 upward. In the supply cylinder 2,
The plunger 4 is accommodated.

[0004] This crusher is operated as follows. First, the plunger 4 is retracted, and the work 10 is introduced from the hopper 3 into the supply cylinder 2. Next, the plunger 4 is advanced, and the work 10 is pressed against the rotary blade 1 and crushed. The opening 6 to which the hopper 3 is connected
Is closed by the side of the plunger 4 as the plunger 4 advances.

(Problems of the Prior Art) The conventional crusher shown in FIG. 3 is configured such that the plunger 4 crosses the opening 6 and closes the opening 6 on the side surface of the plunger 4. Pressing force required for the workpiece 1
The pressing force (effective pressing force) required only for cutting of 0 is excessive. For this reason, it is difficult to maintain the effective pressing force acting between the work 10 and the rotary blade 1 at an optimum value. Further, the pressing force required to close the opening 6 changes depending on the amount of the work 10 accommodated in the hopper 3, and thus the value of the effective pressing force acting between the work 10 and the rotary blade 1. And as a result, the feed speed fluctuates, and the particle size and processing time after pulverization vary greatly.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the conventional crusher, and an object of the present invention is to provide an effective pressing force acting between a work and a rotary blade. It is an object of the present invention to provide a crusher capable of reducing the fluctuation range of force and thereby improving the uniformity of the particle size after grinding.

[0007]

The crushing machine according to the present invention is a crushing machine for pressing a work to be processed against a cylindrical rotating blade having a number of cutting blades arranged on an outer peripheral surface thereof. A cylindrical supply cylinder, which is arranged so that the distal end portion is directed toward the outer peripheral surface of the rotary blade, and the distal end portion is formed so as to face the outer peripheral surface of the rotary blade via a predetermined clearance, and guides the work toward the rotary blade, A hopper that is connected to an opening provided upward on the side surface of the supply cylinder and stores the work and supplies the work into the supply cylinder; and a hopper provided behind the opening (an edge farther from the tip of the supply cylinder). Hinged joint, a gate valve connected to the hinged joint, and tilting up and down around the hinged joint to open and close part or all of the opening, and housed in the supply cylinder, The work supplied to the And a plunger for feeding toward the outer periphery of the rotary blade, when said plunger is in the retracted limit,
The gate valve is in a position tilted downward, the opening is opened, and with the advance of the plunger, the plunger contacts the back surface of the gate valve to tilt the gate valve upward. , So that the opening is closed.

[0008] The operation of the crusher of the present invention is performed as follows.

First, when the plunger is retracted, the gate valve tilts downward to open the opening, and the work is introduced from the hopper into the supply cylinder. Next, when the plunger is advanced, the plunger contacts the back surface of the gate valve and tilts the gate valve upward, thereby closing the opening.
Further, when the plunger is advanced, the work remaining in the supply cylinder is pressed against the rotary blade by the plunger and is crushed.

[0010] According to the crusher of the present invention, at the time of crushing, the opening connecting the hopper and the supply cylinder is opened and closed by tilting the gate valve around the hinge joint by the plunger. The opening can be closed with a smaller force than in the case of, and the variation in the pressing force of the plunger can be reduced. As a result, the range of fluctuation of the effective pressing force acting between the work and the rotary blade is reduced, and the uniformity of the particle size after pulverization is improved.

[0011]

FIG. 1 shows an example of a crusher according to the present invention. A rotary blade 1 has a cylindrical shape, and cutting blades made of super-hard tools are arranged on the outer peripheral surface thereof. I have. The supply cylinder 2 is arranged in a posture inclining with respect to a horizontal plane, with the tip side being obliquely downward. The supply tube 2 is arranged with its tip end facing the outer peripheral surface of the rotary blade 1, and guides the workpiece 10 to be crushed toward the rotary blade 1. The tip of the supply cylinder 2 is a rotary blade 1
Is formed in such a shape as to face the outer peripheral surface thereof via a predetermined clearance. The value of the clearance is determined according to the required particle size.

An opening 6 is provided on a side surface of the supply cylinder 2 so as to face upward. The hopper 3 is connected above the opening 6. The hopper 3 stores the work 10 and supplies the work 10 into the supply tube 2. Here, the opening 6 is formed in such a size that the work 10 in the hopper 3 can be easily introduced into the supply tube 2. A hinge joint 7 is provided behind the opening 6. The gate valve 8 is
It is connected to the hinge joint 7 and tilts up and down around the hinge joint 7 to open and close a part of the opening 6 (a part corresponding to the rear end side).

A plunger 4 is inserted into the supply cylinder 2 from the rear end side. As shown in FIG. 1A, when the plunger 4 is at the retreat limit, the gate valve 8 is at a position tilted downward, and the opening 6 is in an open state. When the plunger 4 is advanced from the retreat limit, as shown in FIGS. 1B and 1C, the plunger 4 comes into contact with the back surface of the gate valve 8 and tilts the gate valve 8 upward. 6 is in a closed state.

The operation of the crusher is performed as follows.

First, when the plunger 4 is retracted, the gate valve 8 is tilted downward to open the opening 6, so that the work 10 is smoothly introduced from the hopper 3 into the supply cylinder (FIG. 1 ( a)). Next, when the plunger 4 is advanced, the plunger 4 contacts the back surface of the gate valve 8 and tilts the gate valve 8 upward, whereby the opening 6 is gradually closed (FIG. 1B). When the plunger 4 is further advanced, the plunger 4 comes out below the gate valve 8 so as to sink under the gate valve 8. by this,
The work 10 remaining in the supply cylinder 2 is pressed against the rotary blade 1 by the plunger 4 and is crushed (FIG. 1C).

FIG. 2 shows another example of the crusher of the present invention.
In this example, the gate valve 8 is configured to bend in a tilting direction at an intermediate portion thereof. Otherwise, it is the same as the example shown in FIG.

In this crusher, when the plunger 4 is advanced from the retreat limit, the plunger 4 comes into contact with the back surface of the gate valve 8 above the bent portion, and the upper half of the gate valve 8 is tilted upward (FIG. 2 (a)). When the plunger 4 is further advanced, the plunger 4 comes into contact with the back surface of the gate valve 8 below the bent portion, and the lower half of the gate valve 8 is tilted upward. Next, in a state where the back surface of the lower half of the gate valve 8 is parallel to the side surface of the plunger 4, the plunger 4 moves forward so as to enter below the gate valve 8, and the opening 6 is closed (FIG. 2). (B)). Further, when the plunger 4 is advanced, the work 10 remaining in the supply cylinder 2 is pressed against the rotary blade 1 by the plunger 4,
It is crushed (FIG. 2 (c)).

In the above example, the gate valve 8 has the opening 6
An example in which a part of the work 10 is opened and closed has been described,
Since the space is further introduced into the space on the tip side of the supply cylinder 2, the gate valve 8 may open and close the entire opening 6. Further, in the above-described example, the supply tube 2 is disposed so as to be inclined with respect to the horizontal plane with the front end side being obliquely downward, but may be disposed so that the axial direction is horizontal.

[0019]

According to the crusher of the present invention, at the time of crushing, the opening connecting the hopper and the supply cylinder is opened and closed by tilting the gate valve around the hinge joint by the plunger. The opening can be closed with a smaller force as compared with the structure, and the fluctuation of the pressing force of the plunger can be reduced. As a result, the range of fluctuation of the effective pressing force acting between the work and the rotary blade is reduced, and the uniformity of the particle size after pulverization is improved.

[Brief description of the drawings]

FIGS. 1A and 1B show an example of a crusher of the present invention, FIG. 1A shows a state when the plunger is at a retreat limit, FIG. 1B shows a state when the plunger has advanced to an intermediate position, and FIG. Indicates the state when the vehicle is in the forward limit.

FIGS. 2A and 2B show another example of the crusher of the present invention, wherein FIG. 2A shows a state in which the plunger is at the retreat limit, FIG. 2B shows a state in which the plunger has advanced to the intermediate position, and FIG. This represents the state when the plunger is at the forward limit.

FIG. 3 is a diagram showing an example of a conventional crusher.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Rotary blade, 2 ... Supply cylinder, 3 ... Hopper, 4 ... Plunger, 6 ... Opening, 7 ... Hinge joint, 8 ... Gate valve, 10 ...・ Work to be crushed.

Claims (1)

[Claims] 1. A crusher for crushing a workpiece to be processed by pressing the workpiece against a cylindrical rotary blade having a number of cutting blades arranged on an outer peripheral surface thereof. A cylindrical supply tube having a tip portion formed so as to face the outer peripheral surface of the rotary blade via a predetermined clearance, and guiding a work toward the rotary blade; and an opening provided upward on a side surface of the supply cylinder. Connected to the
A hopper for storing the work and supplying the work into the supply cylinder; a hinge joint provided on the rear side of the opening; and a hinge connected to the hinge joint, and tilting up and down around the hinge joint, thereby opening the opening. A gate valve that opens and closes part or all of the work, and a work housed in the supply cylinder and supplied to the supply cylinder,
A plunger that feeds out toward the outer periphery of the rotary blade, wherein when the plunger is at the retreat limit, the gate valve is at a position tilted downward, the opening is opened, and the plunger is moved forward. The crusher is characterized in that the opening is closed by the plunger being in contact with the back surface of the gate valve and tilting the gate valve upward.