CN102049822A

CN102049822A - Cutter device of SBS (Styrene-butadiene thermoplastic elastomer) expansion dryer and manufacturing method thereof

Info

Publication number: CN102049822A
Application number: CN2009102360814A
Authority: CN
Inventors: 赵俊德; 李学超
Original assignee: China Petroleum and Chemical Corp
Current assignee: China Petroleum and Chemical Corp
Priority date: 2009-10-27
Filing date: 2009-10-27
Publication date: 2011-05-11
Anticipated expiration: 2029-10-27
Also published as: CN102049822B

Abstract

The invention discloses a novel cutter device and a manufacturing method thereof. The cutter device comprises a cutter and a cutter head; the cutter is molded by integrally pressing a rectangular steel plate on a pressing mould and is provided with a base plate and a cutting edge side plate between which a certain included angle is formed; a cutting edge is formed on the cutting edge side plate; the cutter head includes an inner cutter head and an outer cutter head which are fixed together; and the cutter is fixedly connected with the cutter head to form the cutter device. The cutter provided by the invention is simple to machine and manufacture and has low cost. By adopting the novel cutter device, the service life of the cutter of an expansion dryer is prolonged, the particle-cutting effect is obviously improved, the vibration of the device and the weights of the cutter and the cutter head are reduced, and it is convenient for overhaul and maintenance.

Description

SBS expansion-exsiccation machine cutter and manufacture method thereof

Technical field

The present invention relates to a kind of cutter and manufacture method thereof that comprises cutting knife, cutterhead, be specifically related to its manufacture method of cutter of SBS expansion-exsiccation machine in a kind of synthetic rubber field.

Background technology

In the synthetic rubber production technology, the micelle after the cohesion has dropped to below the certain limit content of its free water through the dehydration of extruding-desiccation machine, after this enters expansion-exsiccation machine.Material in expansion-exsiccation machine through the extruding of screw rod and and the violent friction of shear pin, the intensification melting, expansion drying is extruded machine outside and is cut into granular by the cutter of setting outside it at last at the template place.

Yet in the prior art, in order to improve production capacity, SBS (butylbenzene thermoplastic elastomer) device is repeatedly transformed, and especially the transformation of SBS dehydration extruder and the application of Fourdrinier type drying machine have improved the drying capacity of post processing greatly.But along with the raising of production capacity, the long cutting knife of expansion-exsiccation machine has occurred in the course of the work that vibration is big, pelletizing effect instability, problem such as fracture easily.Often need shut-down (breakdown) mainteance, had a strong impact on normal production, and because the requirement of the technological process of production all will be produced some transition wasters when resuming production at every turn, have influence on output and the product percent of pass of SBS, also strengthened the maintenance load of pincers worker simultaneously.According to the statistics of in January, 2007 to September to cutter maintenance situation, it is quite high to draw the fracture frequency damaged of long cutting knife, changes cutting knife 80 times, and changing quantity is 253;

1, slitter shaft, cutting knife carrier wear or damage of bearings are overhauled 11 times altogether;

2, other faults of cutter are overhauled 3 times altogether;

3, shared 144 hours of the cutter repair time.

By analyzing, the main cause that cutting knife fractures has following 3 points:

1, difficulty is adjusted in the cutting knife gap;

2, cutter structure complexity, machining accuracy be cannot say for sure to demonstrate,prove;

3, cutting knife blade Root Stress is concentrated, and is easily broken.

In the prior art, list of references 1 (CN1085486A) discloses a kind of rotary grain-cutter and manufacture method thereof, and specifically disclose and a kind ofly on the stainless steel cutter blank face of cylinder, mill out the profile of tooth base portion, built-up welding Co-Cr-W carbide alloy becomes knife-edge then, grinds out the blade of requirement size at last.This cutting knife is different with structure of the present invention, and manufacture method is too complicated; List of references 2 (CN1170660A) discloses cutting knife commonly used in a kind of prior art, and the blade that main body that this cutting knife is formed from steel and ceramal are made integrally combines and forms.List of references 3 (CN1789460A), the disclosed cutter structure of list of references 4 (CN1789462A) and list of references 2 are similar, just from cutting edge material it are improved.As seen, be not disclosed as in the prior art and solve the problems of the technologies described above and take related art scheme.

Summary of the invention

In view of above-mentioned technical problem, the purpose of this invention is to provide a kind of cutter and manufacture method thereof, the cutter that produces by this manufacture method can obviously reduce the cutting vibration in the course of work and the number of times that fractures, thereby can significantly improve the continuous operating time of expansion-exsiccation machine.

The present invention takes following technical scheme: a kind of cutter, comprise cutting knife and cutterhead, and it is characterized in that cutting knife has blade side plate and substrate by the punch forming of rectangular bar of steel slab integral, has blade on the blade side plate.

Described cutterhead is divided into inner disc part and outer disc portion, and inner disc cooperates with driving shaft, coil outward with inner disc between fixedly connected; Described cutting knife is fixed on the cutterhead; The mode of said fixing can be that bolt connects and other can be used to all modes of fixedly connected two parts; But preferred bolt connects, and helps reducing the vibration of machine like this.Described steel plate adopts corrosion resistant plate, is preferably the 1Gr13 corrosion resistant plate; The size of steel plate can be carried out choose reasonable according to the size of drying machine and the parameters such as size of required rubber grain, and preferably its thickness is 5mm, and length is 405mm, and the blade side plate of described cutting knife preferably has identical width with substrate, is preferably 25mm.Above-mentioned parameter those skilled in the art can and go out a mode according to the model of drying machine and select suitable dimensions.

The cutting knife substrate of whole compression moulding and blade side plate form on the width of rectangle steel plate side by side, and substrate is formed on a side of rectangle steel plate width, and the blade side plate is formed on the opposite side of rectangle steel plate width.Described substrate has identical length and width with the blade side plate.

In addition, cutting knife in the conventional art is stressed directly to be delivered to the position that blade combines with the cutting knife root by blade, because blade part forms by processing and manufacturing, can there be a zone that intensity is more weak at this binding site, long-term pelletizing adds trade union and causes fatigue stress at this position, will cause fractureing of cutter when bearing bigger resistance.Have certain angle between the blade side plate of cutting knife of the present invention and the substrate, the setting by this angle has solved the above-mentioned problems in the prior art.Through test of many times, the applicant finds that the size of angle directly relates to the stressed of cutting knife, angle is crossed conference and is caused the main cutting force of blade side bearing, thereby make the blade side plate fracture easily, angle is too small can directly to influence cutting effect again, the applicant preferably determines to have about 135 ° angle through long-term experiment;

Further again, for fixing of cutting knife and cutterhead, on the substrate of cutting knife root, offer screw, the number of screw and spacing can determine that cutting knife root of the present invention has two screws according to cutting knife length and cutter diameter.

Cutterhead of the prior art is improved to inner disc and outer dish composition, adopts the fixedly connected of similar bolting between inner disc and the outer dish, thereby further avoid the vibration of drying machine body.

In addition, a kind of manufacture method of above-mentioned cutter also is provided, comprising: the step of making a cutting knife: provide a rectangle corrosion resistant plate and to have the compacting tool set of certain angle, described stainless steel plate integral is pressed into cutting knife base substrate (1) and blade side plate (2) with a substrate (1) and blade side plate (2) forms an angle (a), the angle complementation of described angle and compacting tool set, adopt milling cutter to go out blade (3) then, thereby form described cutting knife in the outside of blade side plate Milling Process; Make the step of a cutterhead: provide a cutterhead inner disc and a cutterhead to coil outward, described inner disc is used for and drives the axle that cutterhead rotates and cooperates, described outer coil with inner disc between fixedly connected; And with the step of a plurality of cutting knifes and cutterhead assembling.

Compared with prior art, after cutter of the present invention was transformed enforcement by above-mentioned measure, expansion-exsiccation machine moved very steady so far, old relatively cutting knife, and the workload of maintenance and maintenance significantly reduces, and it is very obvious to transform the back Expected Results.The cutting knife number of times that fractures significantly reduces, and moves very steadily, and the transformation of cutting knife has not only prolonged the continuous operating time of expansion-exsiccation machine greatly, and the pelletizing effect of cutting knife also improves significantly simultaneously, and the vibration of the drying machine body that the cutting knife operation causes also obviously reduces.Because above-mentioned cutting knife and cutter head structure, the processing and manufacturing of cutter are very simple, convenient, greatly reduce the spare part cost.Cutting knife is by the whole compression moulding of steel plate, make that the cutting knife interior tissue is even, improved the intensity of cutting knife, the setting of 135 ° of angles between the blade side plate of cutting knife and the substrate, make stressed can be good at of cutting knife be delivered to substrate, the problem that blade is easy to fracture in the similar prior art can not occur from the blade side; And be directly delivered to drying machine, thereby reduced the vibration of drying machine body by making cutterhead form the operational vibration that effectively to avoid cutting knife by two parts.In addition, structure of the present invention makes that prolonged the service life of cutting knife, the pelletizing effect has also obtained obvious improvement, and can reduce the weight of cutting knife and cutterhead, convenient maintenance and maintenance have reduced workman's workload, because the cutter split is made, processing and manufacturing is also more simple, with low cost.

Description of drawings

1. Fig. 1 is the structure chart of cutting knife in the background technology;

2. Fig. 2 a is the cutter structure figure of the embodiment of the invention;

3. Fig. 2 b is that the A-A of cutting knife of the embodiment of the invention is to view;

4. Fig. 3 a is the side view of cutting knife cutterhead of the present invention;

5. Fig. 3 b is the front view of cutting knife cutterhead of the present invention;

6. Fig. 4 is the assembling pictorial diagram of cutting knife and cutterhead.

The specific embodiment

Cutting knife of the present invention adopts the thick stainless steel materials of 5mm, the concrete 1Gr13 stainless steel materials of selecting, become and be the rectangle steel plate through machining, adopt conventional method to make the compacting tool set of 45 degree then, to this rectangular bar of steel slab integral punch forming, mill out blade by milling machine, certainly, the moulding of blade also can be adopted other common modes.Machined forms the fixed-use bolt hole on the substrate 1 of cutting knife one side at last.Its number can rationally be determined as required.The cutting knife of formation shown in Fig. 2 a, Fig. 2 b.

As can be seen from the figure, the cutting knife of one compression moulding is made of substrate 1 and blade side plate 2, blade 3 is formed on the outside of blade side plate 2, substrate 1 has identical length and width with blade side plate 2, form 135 ° angle between the two, the bolt hole that is used for combining with cutterhead is formed on the substrate 1, have 2 bolts hole that be arranged in parallel 4, spacing is 63mm between 2 bolts hole, diameter of bolt hole is 13mm, bolt hole center's lateral extent outside substrate 1 is 15mm, and the centre distance cutting knife root of inboard bolt hole distance is 15mm.

From Fig. 3 a, 3b as can be seen, cutting knife dish of the present invention is divided into two parts, cooperates with the axle that drives its running as that part of inner disc 5, and its fit system can be the key connection; Be connected with bolt as between another part of outer dish 6 and the inner disc 5; The outer dish of cutting knife offers many group screwed holes in radial direction, and every group of screwed hole cooperates with a cutting knife.The number of every group of screwed hole is corresponding with the number of cutting knife upper screwed hole.

Fig. 4 is the structure chart that cutting knife of the present invention and cutter disc groups install.

Claims

1. a cutter comprises cutting knife and cutterhead, it is characterized in that, cutting knife is by the compression moulding of rectangular bar of steel slab integral, and described cutting knife has substrate (1) and blade side plate (2), forms certain angle between substrate (1) and the blade side plate (2).

2. cutter as claimed in claim 1, described cutterhead are divided into inner disc (5) and outer dish (6) two parts.

3. cutter as claimed in claim 2, described inner disc (5) cooperates with axle, and inner disc (5) is fixedlyed connected with outer coiling between (6).

4. cutter as claimed in claim 1, described substrate (1) and blade side plate (2) are set up in parallel on the width of rectangle steel plate.

5. fixedly connected between the cutter as claimed in claim 1, described cutting knife and cutterhead.

6. as the described cutter of one of claim 1-5, angle is 135 ° between described substrate (1) and the blade side plate (2); Both have identical length and width, and described width is 25mm, and described length is 405mm.

7. as the described cutter of one of claim 1-5, described steel plate is the 1Gr13 stainless steel materials.

8. the manufacture method of a cutter, comprising:

Make the step of a cutting knife: provide a rectangle corrosion resistant plate and to have the compacting tool set of certain angle, described stainless steel plate integral is pressed into cutting knife base with a substrate (1) and blade side plate (2), substrate (1) and blade side plate (2) form an angle (a), the angle complementation of described angle and compacting tool set, adopt milling cutter to go out blade (3) then, thereby form described cutting knife in the outside of blade side plate Milling Process;

Make the step of a cutterhead: provide a cutterhead inner disc and a cutterhead to coil outward, described inner disc is used for and drives the axle that cutterhead rotates and cooperates, described outer coil with inner disc between fixedly connected;

And with the step of a plurality of cutting knifes and cutterhead assembling.

9. the manufacture method of cutter as claimed in claim 8, described angle (a) is 135 °.

10. the manufacture method of cutter as claimed in claim 8, the described bolt that is fixedly connected as connects.