CN2579520Y - Crashing and grinder for waste rubber - Google Patents

Abstract

The utility model relates to a crashing grinder for waste rubber, which comprises a machine casing, a rubber material propeller, a fixed grinding disc, a rotary grinding disc, a driving belt pulley, cooling devices and a rubber-powder fineness adjusting device driven by a motor. The utility model also comprises a hollow shaft for installing the rotary grinding disc; two bearing seats supporting the hollow shaft are respectively arranged on the upper part and the lower part of the rotary grinding disc and are respectively assembled on the machine casing, and the lower end of the hollow shaft is provided with the driving belt pulley. The grinding surfaces of the fixed grinding disc and the rotary grinding disc have equal conicity, hard alloy rack bars are inlaid and welded on the grinding surfaces and are uniformly distributed on the grinding surfaces, and the helix angles of the rack bars are 12DEG-18DEG. The upper part of the fixed grinding disc is provided with the rubber-powder fineness adjusting device, a rubber-powder fineness adjusting drive motor on the machine casing is started, and then power grinding fineness can be adjusted. Both the fixed grinding disc and the rotary grinding disc are provided with the cooling devices. The utility model is especially used for grinding waste rubber, and has the advantages of high productive efficiency, stable and reliable operation and long service life.

Description

Waste Rubber Crushing Mill

Technical field The utility model relates to a solid material crushing mill, in particular to a waste rubber crushing mill.

Waste rubber crushing mill is a special equipment for recycling waste rubber.

Background technology At present, there is a kind of rubber and plastic pulverizer that has the disadvantage of unreasonable structure. The upper end of the hollow shaft of this machine is equipped with a grinding disc, and the lower end of the hollow shaft is equipped with a transmission pulley. The bearing seat supporting the hollow shaft is located in the middle of the hollow shaft. The supporting structure of the single fulcrum beam, and the hollow shaft bears a large bending moment, which cannot guarantee the rotation accuracy and stability of the bearing, the hollow shaft and the grinding disc, and affects the service life of the whole machine. In addition, the number of spiral angles of the carbide rack on the grinding surface of the rotating grinding disc and the fixed grinding disc of the machine is too small, which affects the production efficiency of the whole machine.

In addition, there is a special grinder for waste rubber that also has the disadvantage of unreasonable structure. The rubber powder fineness adjustment device of this machine is to adjust the gap between the rotating grinding disc and the fixed grinding disc by changing the axial displacement of the rotating grinding disc. Therefore, the bearing supporting the hollow shaft is a dynamic fit with the journal or the hole of the bearing seat to adjust the axial displacement of the hollow shaft and the movable grinding disc. This structure cannot guarantee the rotation accuracy of the hollow shaft and the rotating grinding disc. and service life.

SUMMARY OF THE INVENTION In order to solve the problems of the above pulverizers, the utility model provides an improved waste rubber pulverizer. The utility model changes the design of the position and structure of the bearing on the hollow shaft, so that the force on the hollow shaft and the rotating grinding table is reasonable, and at the same time, it also changes the arrangement scheme of the hard alloy rack on the grinding surface of the rotating grinding table and the fixed grinding table.

A crushing mill for waste rubber, its structure mainly includes: a casing, a rubber propeller, a hollow shaft, a fixed grinding disc, a rotating grinding disc, a transmission pulley, a rubber powder fineness adjustment device and a cooling device. It also includes a hollow shaft for installing the grinding disc, and the bearing seats for supporting the hollow shaft are respectively arranged on the upper part and the lower part of the grinding disc, and are respectively assembled on the casing. The fit between the inner hole of the bearing and the journal adopts the interference fit standard, and the fit between the outer diameter of the bearing and the housing hole adopts the transition fit standard. The lower end of the hollow shaft is equipped with a drive belt pulley. Carbide racks are inlaid and welded on the grinding surfaces of the rotating grinding disc and the fixed grinding disc, the racks are evenly distributed on the grinding surfaces, and the helix angle of the racks is 12° to 18°. The upper part of the fixed grinding table is equipped with a rubber powder fineness adjustment device. The driving motor of the device is arranged on the casing, and the driving motor can be started to adjust the grinding fineness. Both the fixed grinding disc and the rotating grinding disc are equipped with cooling devices.

The beneficial effect of the utility model is that the reasonable design of the position and structure of the hollow shaft supporting bearing of the utility model makes the machine run smoothly, reliably and prolong the service life. The change of the arrangement scheme of the hard alloy rack on the grinding surface of the rotating grinding disc and the fixed grinding disc improves the production efficiency of the machine.

BRIEF DESCRIPTION OF THE DRAWINGS The attached drawing is a schematic structural diagram of a waste rubber crushing mill.

DETAILED DESCRIPTION Referring to the accompanying drawings, a waste rubber crushing mill includes a casing 2, a fixed grinding table 3, a rotating grinding table 4, a rubber propeller 1, and a powder outlet 10 installed in the casing 2. Hollow shaft 5 is installed in the central hole of turning millstone 4, and the bearing housing 7,13 of supporting hollow shaft 5 is respectively arranged at the upper and lower ends of turning millstone 4, and is installed in the top and the bottom of casing 2 respectively. The fit between the inner hole of the bearing and the journal adopts the interference fit standard, and the fit between the outer diameter of the bearing and the housing hole adopts the transition fit standard. The drive pulley 12 is equipped with at the hollow shaft lower end. The upper and lower ends of the hollow shaft 5 are also equipped with rotary joints 6,11. Cooling water enters the cavity of the grinding disc through the rotary joint 11 at the lower end, and is discharged through the rotary joint 6 at the upper end.

The taper of rotating grinding disc 4 and the grinding surface of fixed grinding disc 3 are equal, and the grinding surface is inlaid and welded with hard alloy rack, and the rack is evenly distributed on the grinding surface, and the helix angle of the rack is 12°～18°.

The rubber powder fineness adjustment device 9 is installed on the upper part of the fixed grinding table 3, and the rubber powder fineness adjustment drive motor 8 on the casing can be started to change the axial displacement of the fixed grinding table 3 through the transmission mechanism in the casing to adjust The size of the gap between the rotating grinding disc 4 and the fixed grinding disc 3 meets the requirement of adjusting the fineness of rubber powder.

The cooling water inlet and outlet of the inner cavity of the fixed grinding disc 3 are respectively opened on both sides of the grinding disc.

During use, the waste rubber is pushed into the casing by the rubber pusher 1 between the grinding surfaces of the rotating grinding table 4 and the fixed grinding table 3 for grinding, and at the same time cooling water is passed into the cavities of the fixed grinding table and the rotating grinding table to reduce the The heat generated during the grinding process, the fineness of the grinding rubber powder can be adjusted by pressing the electric control button for adjusting the fineness of the rubber powder. The ground rubber powder is sucked out by the induced draft fan connected outside the powder outlet 10.

Claims (3)

1, a kind of waste rubber powder disintegrator, it comprises casing, sizing material propeller, hollow shaft, fixed millstone, the dish of going round and round a millstone, driving pulley, rubber powder fineness adjusting device and cooling device, it is characterized in that, two supporting shaft holder branches of the hollow shaft of installing in the described center hole of going round and round a millstone are located at the upper and lower of the dish of going round and round a millstone, and bearing block is assemblied on the casing respectively; On described go round and round a millstone dish and the fixed millstone flour milling all welding-on the carbide alloy tooth bar is arranged, the uniform flour milling of tooth bar, the helical angle of tooth bar is 12 °～18 °, the tapering of the go round and round a millstone dish and the flour milling of fixed millstone is equal.

2, according to claim 1 described waste rubber powder disintegrator, it is characterized in that the axle journal of the upper and lower installing bearing of hollow shaft adopts the interference fit standard with cooperating of brearing bore, bearing outside diameter with bearing saddle bore cooperate employing interference fits standard.

3, according to claim 1 described waste rubber powder disintegrator, it is characterized in that the drive motors of rubber powder fineness adjusting device is located on the casing, start the axial displacement that drive motors can change fixed millstone, to adjust fixed millstone and the gap between the mill face of going round and round a millstone.