CN2915261Y

CN2915261Y - Cutter of plastic and rubber crusher

Info

Publication number: CN2915261Y
Application number: CNU2006200387373U
Authority: CN
Inventors: 中村文三郎
Original assignee: KAWATA Manufacturing (SHANGHAI) Co Ltd
Current assignee: KAWATA Manufacturing (SHANGHAI) Co Ltd
Priority date: 2006-01-05
Filing date: 2006-01-05
Publication date: 2007-06-27
Anticipated expiration: 2016-01-05

Abstract

The utility model discloses a knife for rubber crushing machinery comprising a knife body. The knife-edge of the knife body is provided with at least two edges along the vertical direction of the knife body. Two edges are more favorable. One edge is an edge for the first cutting and the other is an edge for the second cutting. The included angle formed by the axial extension line of the first cutting edge and the axial extension line of the second cutting edge is an obtuse angle, so that the. Anti-impact capacity of the knife is increased and the cutting force is bigger. On the knife body, the second cutting edge must not be higher than the first cutting edge in radium direction. In addition, the intersection between the axial extension line of the first cutting and the axial extension line of the second cutting has an arched transition so as to reduce the load impact of the machine during cutting and extend life. One side of the knife body is provided with a kidney-shaped hole that stretches put along the rotational direction of the knife body so as to facilitate the rotation of the knife body.

Description

A kind of cutter of rubber and plastic pulverization machine

Technical field

The utility model relates to employed cutter in a kind of rubber and plastic pulverization machine.

Background technology

In the injection process of rubber or working of plastics, because injection technique and mould designing requirement generally all can leave the cast gate material more or less, these cast gate material can recycling.And the cast gate material is when recycling, generally to pulverize through the rubber and plastic pulverizer, after the dedusting could with carry out injection moulding after virgin material mixes.

The cutter of the rubber and plastic pulverizer of commonly using at present generally is made of rotary pawl cutter and fixed cutting tool, wherein the structure of rotary pawl cutter is generally: offer the axis through-hole that has keyway at pawl cutter body middle part, outer ledge at the pawl cutter is provided with one or a pair of shape blade of cutting sth. askew, thereby the rotary pawl cutter is packed in the rotating shaft, and make the blade of rotary pawl cutter corresponding, thereby can cut-out and crushing rubber or plastics with fixed cutting tool.Existing shortcoming be since when using rubber or plastics gather easily between the blade and fixed cutting tool of rotary pawl cutter; make cutting load big; noise is big; the fluctuation of live load is remarkable; the rotary pawl cutter fractures easily; the easy stuck main frame of plastics causes shutdown, and reclaims the descending pulverizing of plastics and will be undertaken by the platform classification at several equipment rooms.

For this reason, applicant's Wu Yifu is on July 1st, 2002 and the Chinese utility model patent of applying for two relevant rotary cutters on November 4th, 2003, the utility model patent of these two rotary cutters gives Granted publication respectively on May 21st, 2003 and on December 22nd, 2004, and both notification numbers are respectively CN2551342Y and CN2664778Y.

Wherein notification number is the rotary pawl cutter of the plastic crusher of CN2551342Y bulletin, its center and rotating shaft install, on the surface of revolution that with the axis is heart yearn, cutting edge is arranged, also be provided with a cutting edge at its edge perpendicular to the end face of axis, the starting point of these cutting edges is dispersed in the footpath that do not overlap mutually upwards and to be dispersed in waney mutually be on the surface of revolution of heart yearn with the axis.The foundation of this patent design is: fixed cutting tool is normally in a plane parallel with axis, at any one time, the starting point of each cutting edge and the cutting edge of fixed cutting tool have nothing in common with each other, wait is sheared between rotary pawl cutter and the fixed cutting tool so either large or small recovery rubber or plastics may fall into, and makes machine can handle the recovery plastics in the larger size range; Same foundation is as can be known: each cutting edge is started working to be had successively in time, and the noise of machine and load impact mainly are created in the moment that cutting edge is started working, so just noise and load impact can be disperseed on time order and function, and be produced the little effect of noise fluctuation little, live load.The one-shot that will have cutter in this patent when working as the monolithic rotating blade of mentioning now is separated into three times, and two rotating blades of combination will have cutter now when working one-shot is separated into six times.

Notification number is the rotary pawl cutter of the plastic crusher of CN2664778Y bulletin, constitute by pawl cutter body, the center of described pawl cutter body offers the axis through-hole with keyway, on pawl cutter body, its edge perpendicular to the end face of the central axis of axis through-hole is provided with a plurality of cutting edges, and the footpath that does not overlap mutually that the starting point of each cutting edge is dispersed in described end face upwards, and to be dispersed in described central axis be on mutual waney surface of revolution of heart yearn.The technical problem underlying of its solution also is that the starting point of rotary pawl cutter and the cutting edge distance of fixed cutting tool are had nothing in common with each other, the asynchronism(-nization) that causes each cutting edge to start working, so that noise and load impact are disperseed, and produce the little effect of noise fluctuation little, live load on time order and function.

The technical scheme of above-mentioned two patents mainly is the multiple-cutting-edge mouth that design is in diverse location on the rotary pawl cutter, makes each cutting edge different with the cutting edge distance of fixed cutting tool, comes distributed noise and load impact.But this class rotary pawl cutter exists problems such as processed complex.

The utility model content

The purpose of this utility model provides a kind of cutter of rubber and plastic pulverization machine, the cutter of this rubber and plastic pulverization machine, and structure is simpler, easy to process, strong shock resistance, cutting force is bigger, the stock-removing efficiency height, long service life reduces the machine works load fluctuation, reduces card machine phenomenon.

In order to solve the problems of the technologies described above, technical solution adopted in the utility model is: a kind of cutter of rubber and plastic pulverization machine, constitute by cutter body, it is characterized in that: on the blade of described cutter body, be provided with at least two cutting edges along the plumb line direction of cutter body.Reasonable is to have two cutting edges, and one of them is the cutting edge first time, and another is the cutting edge second time.

Aspect the Position Design of two cutting edges, for the first time cutting edge extend axially line with the second time cutting edge the angle that extends axially between the line be the obtuse angle.The angle at obtuse angle is reasonable to be 120-170 °, can increase the impact resistance of cutter like this, and cutting force is bigger.

For when cutting, reduce the load impact of machine works, increase the service life, cutting edge upwards must not be higher than cutting edge for the first time in the footpath of cutter body for the second time.And the first time cutting edge extend axially line and for the second time the intersection that extends axially between the line of cutting edge pass through arc transition.

Offer axle core through hole at the center of described cutter body, on cutter body, be symmetrically arranged with two blades on its edge perpendicular to the end face of the central axis of axis through-hole with keyway.

In order to increase the intensity of cutter body, on cutter body, its last lower limb perpendicular to the end face of the central axis of axis through-hole is symmetrically arranged with two reinforcements.

When crushing rubber or plastics, sometimes to be checked through the situation of cutting edge roundness situation and cutting edge adhesion rubber or plastics, the general at present method that adopts is to check with hand rotation cutter shaft or cutter, so easy wound is set about, in order to solve this type of problem, the manufacturer that has the just side on cutter body opens a square hole, is that the hook end of square hook is inserted into and comes rotary cutter in the square hole with a cross section.There are several problems in this mode, the one, the contact point of square hook end and square hole is few, and the strength that needs when rotating is bigger, the easy base of square hook end and fractureing, the 2nd, the area of square opening is few, when the cutter body in front turns to extreme position, square hole on the next cutter does not also expose, second cutter of bad rotation, therefore, the side of the utility model on cutter body offers a mounting hole along the stretching, extension of cutter body rotation direction.Described mounting hole can along cutter body axially through whole cutter body.

Owing to adopted technique scheme, the blade of cutter provided by the utility model adopts the multiple-cutting-edge mouth, and particularly double blade design can make cutting force bigger, and stock-removing efficiency is higher, has saved energy consumption.Angle between the double blade is that obtuse angle and both intersections that extends axially line adopt arc transition, has improved the resistance to impact of whole cutter, makes cutting ratio more steady, has reduced the phenomenon of the cutter explosion that in use occurs.The mounting hole of on cutter body, offering, can be easily be that hexagonal hook end hook is lived cutter body and rotated with a cross section, and the contact point of hook end and mounting hole is many, be not easy base, also be not easy to fracture, and forward extreme position to when the cutter body in front, in the time of can not re-using the hook end, mounting hole on second cutter body exposes, and can remove to hook second cutter body with the hook end easily so again and rotate, and has improved the security when cutter body is checked.Cutter of the present utility model is particularly suitable for using in the low speed pulverizer of online recycling engineering plastics cast gate.

Description of drawings

Fig. 1 is the structural representation of the utility model cutter.

Fig. 2 is the vertical view of Fig. 1.

Fig. 3 is the A-A cutaway view of Fig. 1.

The specific embodiment

Be described in further detail below in conjunction with reaching the cutter of specific embodiment the utility model rubber and plastic pulverization machine.

Referring to Fig. 1-Fig. 2, the cutter of shown rubber and plastic pulverization machine is made of cutter body, and the center of described cutter body offers the axle core through hole 2 with keyway 3, is used for adopting the key ways of connecting to be fixedly installed to the rotating shaft of the cutter of plastic crusher on cutter.

The cutter body that present embodiment provided is a flat board 1, and dull and stereotyped 1 front and rear panel face 10 is perpendicular to the end face of central axis, and dull and stereotyped 1 side 11 is for being parallel to the end face of central axis.

Described dull and stereotyped 1 front and rear panel face 10 middle parts one lateral edges is a circular edge 8, the opposite side edge is linear edge 8a, its two ends are symmetrically arranged two blades 5, and blade 5 combines by circular arc type blade 51 with along the extended linear pattern blade 52 of circular arc type blade 51 tangential directions.

One end of circular arc type blade 51 is connected with described circular edge 8 transition, and the other end of linear pattern blade 52 is the wedge angle 7 of whole blade 5, and the wedge angle 7 at two ends is around the central axis symmetry.The opposite side of wedge angle 7 carries out the transition to the end away from central axis of described linear edge 8a by one section curved edge 4, one section linear edge 6, one section radiused edges 9.

In order to increase the intensity of cutter body, on cutter body, linear edge 8a is provided with reinforcement 81a.

Referring to Fig. 3, on the blade 5 of cutter body, plumb line direction along cutter body is provided with two cutting edges, one of them is a cutting edge 53 first time, another is a cutting edge 54 second time, for the first time cutting edge 53 extend axially line 55 with the second time cutting edge 54 the angle α between the line 56 of extending axially be 120-170 ° obtuse angle, can increase the impact resistance of cutter like this, cutting force is bigger.

For when cutting, reduce the load impact of machine works, increase the service life, cutting edge 54 upwards should be lower than cutting edge 53 for the first time in the footpath of cutter body for the second time.And the first time cutting edge 53 extend axially line 55 and for the second time cutting edge 54 extend axially intersection between the line 56 by circular arc 57 transition.

Referring to Fig. 1, the side on cutter body offers one and stretches and through the mounting hole 10a of whole cutter body along the cutter body rotation direction.

Owing on the blade on the cutter body, increased cutting edge, make cutter when cutting, increase mechanical strength, impact capacity doubles above than general cutter, thereby has increased service life.Solve the not impact-resistant defective of existing cutter, in use caused the phenomenon of cutter explosion easily.Because the improvement of cutter makes cutting hardness more steady, when reducing impact, equally also saved energy consumption.

More than be preferred embodiment of the present utility model, all changes of doing according to technical solutions of the utility model when the function that is produced does not exceed the scope of technical solutions of the utility model, all belong to protection domain of the present utility model.

Claims

1, a kind of cutter of rubber and plastic pulverization machine is made of cutter body, it is characterized in that: on the blade of described cutter body, be provided with at least two cutting edges along the plumb line direction of cutter body.

2, the cutter of a kind of rubber and plastic pulverization machine as claimed in claim 1 is characterized in that: described cutting edge is two, and one of them is the cutting edge first time, and another is the cutting edge second time.

3, the cutter of a kind of rubber and plastic pulverization machine as claimed in claim 2 is characterized in that: described first time cutting edge extend axially line and for the second time the angle that extends axially between the line of cutting edge be the obtuse angle.

4, the cutter of a kind of rubber and plastic pulverization machine as claimed in claim 3 is characterized in that: the angle at described obtuse angle is 120-170 °.

5, the cutter of a kind of rubber and plastic pulverization machine as claimed in claim 2 is characterized in that: described second time, cutting edge upwards was lower than cutting edge for the first time in the footpath of cutter body.

6, the cutter of a kind of rubber and plastic pulverization machine as claimed in claim 3 is characterized in that: described first time cutting edge extend axially line and for the second time the intersection that extends axially between the line of cutting edge pass through arc transition.

8, the cutter of a kind of rubber and plastic pulverization machine as claimed in claim 1, it is characterized in that: offer axle core through hole at the center of described cutter body with keyway, on cutter body, be symmetrically arranged with two blades on its edge perpendicular to the end face of the central axis of axis through-hole.

8, the cutter of a kind of rubber and plastic pulverization machine as claimed in claim 7 is characterized in that: on cutter body, its last lower limb perpendicular to the end face of the central axis of axis through-hole is symmetrically arranged with two reinforcements.

9, the cutter of a kind of rubber and plastic pulverization machine as claimed in claim 1 is characterized in that: the side on cutter body offers a mounting hole along the stretching, extension of cutter body rotation direction.

10, the cutter of a kind of rubber and plastic pulverization machine as claimed in claim 9 is characterized in that: described mounting hole along cutter body axially through whole cutter body.