JPH0619831U - Inorganic fiber crusher - Google Patents

Abstract

(57) [Abstract] [Purpose] An inorganic fiber crusher equipped with a screen that is free of metal particles that wear the screen and has excellent wear resistance and impact resistance. [Structure] Rotating body with hammer 3 in casing 1
In the high-speed rotary pulverizer that pulverizes the inorganic fiber that is the object to be pulverized by the rotation of No. 1, a grid type screen A is provided outside the rotating body 3. This lattice type screen A is supported by annular supporting frames 7, 7 that are opposed to each other with a space therebetween, and is supported between both supporting frames, and has a circular cross section arranged in a lattice shape with a predetermined gap in the annular direction. The rod member 8 is made of a non-metallic material having wear resistance and impact resistance, such as ceramics or engineering plastics. With the above configuration, the metal abrasion powder does not mix with the inorganic fiber material that is the object to be crushed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an inorganic fiber crusher used for crushing inorganic fibers such as aluminum fibers and aluminosilicate fibers used as reinforcing fibers for composite materials such as FRM, FRC and FRP.

[0002]

[Prior art]

 Conventionally, a crusher having a structure as shown in FIG. 4 has been used as a crusher. In the figure, 1 is a housing that constitutes a crusher, 2 is a screen, 3 is a rotating body, 4 is a large number of hammers radially protruding from the peripheral surface of the rotating body, and they are inserted into the hopper 5. The object to be crushed is fed into the crushing chamber by the screw conveyor 6, crushed by the high speed rotation of the rotary body 3 with a hammer, and discharged downward through the screen 2.

[0003]

[Problems to be solved by the device]

 In the crusher with the above structure, a screen made of metal such as steel or stainless steel is usually attached, but when used for crushing non-organic fibers such as alumina fibers and aluminosilicate fibers, During the crushing process, the metal powder generated due to the abrasion of the metal screen mixes with the inorganic fiber that is the object to be crushed, and the product value is reduced due to coloring, and the performance of the secondary product is adversely affected. . In order to prevent such problems, it is desirable to use a screen made of ceramics, polyetheretherketone, engineering plastics such as polycarbonate, etc. with excellent wear resistance and impact resistance. It is difficult to process into complicated shapes.

[0004]

[The purpose of the device]

 The present invention has been made in order to solve the above problems, and is provided with a screen that is free of abrasion metal powder in the pulverized inorganic fiber material and has excellent abrasion resistance and impact resistance. It is intended to provide an inorganic fiber crusher.

[0005]

[Means for Solving the Problems]

 The inorganic fiber crusher in the present invention crushes the object to be crushed sent to the crushing chamber in the casing by the rotating body with the hammer rotating in the crushing chamber, and discharges it to the outside through the screen arranged outside the rotating body. In the crusher, the screen is supported by annular supporting frames that are opposed to each other with a predetermined interval, and is supported between both supporting frames, and has a circular cross section arranged in a lattice shape with a predetermined gap in the annular direction. The gist is that the bar member is formed of a non-metallic material having wear resistance and impact resistance. As the lattice-shaped rod member that constitutes the screen, engineering plastics such as ceramics, polyether ether ketone resin, or polycarbonate resin is used.

[0006]

[Action]

 According to the above configuration, the screen is configured in a lattice type, and the rod member forming the lattice is made of a non-metallic material having abrasion resistance and impact resistance, so that the object to be crushed is not subject to metal abrasion powder. Will not be mixed in.

[0007]

【Example】

 1 to 3 show an embodiment of the present invention. In the figure, the same members as those in FIG. 4 are designated by the same reference numerals.

That is, 1 is a housing constituting a crusher, 3 is a rotating body, 4 is a hammer, 5 is a hopper, and 6 is a screw conveyor. The screen A is supported by annular supporting frames 7 and 7 facing each other with a predetermined gap, and is supported between the supporting frames 7 and 7, and is arranged in a lattice pattern with a predetermined gap in the annular direction. And the rod member 8 of.

For the rod member 8, ceramics or engineering plastics such as polyetheretherketone resin and polycarbonate resin is used. The support frame 7 is preferably made of the same material as the bar member, but there is no particular limitation.

As a means for assembling the annular support frames 7 and 7 and the rod member 8, in the illustrated example, the rod member 8 placed at a required central angle (for example, 120 degrees) is placed on the support frames 7 and 7. It is fitted and fixed from the side with screws 9, and the other rod member 8 is inserted into a hole formed in one of the support frames and fitted into the recess of the other support frame, and the structure is assembled. In this screen configuration, the rod member on the side facing the screw conveyor is not provided, but an opening for receiving the crushed object is formed.

[0011]

[Effect of device]

 As described above, in the inorganic fiber crusher of the present invention, instead of the conventional metal multi-hole screen, the cross section of non-metallic material such as ceramics or engineering plastics having excellent hair abrasion resistance and impact resistance is used. Since the lattice type screen composed of the round bar member and the supporting frame for supporting them is used, metal abrasion powder is not mixed into the crushed object. Further, since the lattice is formed by using rod members having a round cross section, clogging is unlikely to occur, and the processing of the material is relatively easy. In addition, even if the bar member is damaged, only that part needs to be replaced, and it is not necessary to replace the entire screen.

[Brief description of drawings]

FIG. 1 is a sectional view of an inorganic fiber crusher showing an embodiment of the present invention.

FIG. 2 is a side view of a screen.

FIG. 3 is a plan view of a main part of a screen.

FIG. 4 is a sectional view of a conventional high speed crusher.

[Explanation of symbols]

 1 Crusher casing 2 Conventional screen 3 Rotating body 4 Hammer 5 Hopper 6 Screw conveyor A Screen used in the present invention 7 Support frame 8 Bar member 9 Bar member fixing screw

Claims (2)

[Scope of utility model registration request] 1. A crusher for crushing an object to be crushed sent to a crushing chamber in a casing by a rotating body with a hammer rotating in the crushing chamber and discharging the crushed substance to the outside through a screen arranged outside the rotating body, The screen is composed of annular support frames facing each other at a predetermined interval, and rod members supported by both support frames and having a circular cross section arranged in a lattice pattern with a predetermined gap in the annular direction. An inorganic fiber crusher, characterized in that the rod member is formed of a non-metallic material having wear resistance and impact resistance. 2. The inorganic fiber pulverizer according to claim 1, wherein the rod member having a round cross section is made of ceramics or engineering plastics such as polyether ether ketone resin and polycarbonate resin.