CN2164908Y

CN2164908Y - Knife for file mincing machine

Info

Publication number: CN2164908Y
Application number: CN 93237043
Authority: CN
Inventors: 唐世颖
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-06-12
Filing date: 1993-06-12
Publication date: 1994-05-18
Anticipated expiration: 2003-06-12

Abstract

The utility model relates to a mincing cutter for a file mincing machine in the field of office automation. The utility model is characterized in that the centerline of external each long screwy groove deviates from the cutter centerline for certain distance to form each transverse cutting edge rake angle of the cutter, and a long helicoidal groove is arranged on the main shaft of the assembly type cutter and alternately assembled by easy processing disk-shaped blades and space collars along the long helicoidal groove. The utility model overcomes the problems of hard machining and high manufacturing cost of the mincing cutter the prior art.

Description

Knife for file mincing machine

The utility model relates to a kind of paper shredding cutters of file crushing machine in the office automation field.

In the prior art, it only uses the cutter of one group of two mutual reverse rotation with the paper grating a kind of file crushing machine.The operation principle of this shredder is that these two cutters roll into strip along the mutual wedging of garden desk blade that total length distributes with paper, and meanwhile the horizontal cutting edge of the long spiral groove formation of these two cutter outer surfaces is cut into sectional paper scrap with rectangular official form for filing a lawsuit.

Existing this cutter exists following problem: as the paper shredding cutters among German Intimus shredder and the BP GB2137900A, because the relief angle of the horizontal cutting edge that long spiral groove forms is not equal to zero degree, add the blade that be difficult to guarantee each horizontal cutting edge of cutter man-hour and equate with the distance of shaft center line, promptly each horizontal cutting edge (f) of radially distributing of cutter is very difficult processes in same garden on week.In addition, its each spiral groove processing is difficult for, and the center of the long spiral groove of Intimus company cutter for paper grinder overlaps with the axial line of cutter, and the anterior angle of horizontal cutting edge is very little, need process a plurality of long spiral grooves of relief angle and cutting.

The purpose of this utility model is: improve the paper shredding cutters of this shredder, make it be easy to processing and manufacturing under the prerequisite that guarantees the shredded paper performance and reduce production costs.

, taked to strengthen anterior angle and make relief angle equal the measure of zero degree on week in same garden fully in order to guarantee enough sharp and each the horizontal cutting edge (f) of horizontal cutting edge (f) that each long spiral groove forms.It is sharp that anterior angle adds ambassador's blade, and relief angle α=0 ° makes each horizontal cutting edge (f) be positioned at surface, outer garden, needn't only grind outer garden during sharpening portion (f) and get final product for blade (f) the mill relief angle of each horizontal cutting edge.

In order to save the man-hour of the many long spiral grooves of processing on same cutter, the utility model is long spiral slot of processing on the main shaft of assembled cutter only, each garden desk blade is added spacer ring alternately pack into, thereby on paper shredding blade, form several long spiral grooves along this long spiral slot.Because each groove of garden desk blade is that the cold stamping essence is washed into type, so these long spiral grooves do not need to carry out machining again.

The utility model has compared with prior art reduced the difficulty of processing of this paper shredding cutters, has reduced machining period, thereby has reduced the production cost of shredder.

Description of drawings

Fig. 1 is the fundamental diagram of cutter for paper grinder.

Fig. 2 is the structure of the long spiral groove of cutter.

Fig. 3 is the main shaft of assembled cutter.

Fig. 4 is the structure of the long spiral groove of the another kind of pattern of cutter.

Fig. 5 is the spacer ring between two blades of assembled cutter.

The schematic diagram of Fig. 6 A, the long spiral groove in 6B cutter surface, outer garden.

Be embodiment of the present utility model below.

As shown in Figure 1, the meshing point (P) that file (1) is delivered to the paper shredding blade (3) of a pair of mutual reverse rotation and (4) from the paper feed window through lateral paper guide (2) begins by grating, the both ends of the surface of paper shredding blade (3) and (4) each garden desk blade roll into long affair shape with the cutting edge that outer garden intersection forms with paper, on the other hand, the horizontal cutting edge (f) of the many long spiral grooves formation cutters in paper shredding blade (3) and (4) rolls into the segment paper scrap with rectangular paper.This process is to finish with interior at the mesh regional (P-Q) of paper shredding blade (3) and (4).

Present embodiment as shown in Figure 2, has so just strengthened the anterior angle of cutter traverse cutting edge (f) with misalignment cutter spindle center one segment distance (l) of each spiral groove, and the anterior angle after the increasing is far longer than the anterior angle of conventional cutter, is+40 °～+ 60 °.Make the relief angle of cutter traverse cutting edge (f) equal zero degree simultaneously.Because each horizontal cutting edge (f) is surface, garden outside cutter all, each the horizontal cutting edge (f) of a feasible wherein paper shredding blade and gap (δ) uniformity of another part paper shredding blade bottom land can both break paper effectively to guarantee each horizontal cutting edge (f).

With Fig. 2 or garden desk blade (5) shown in Figure 4 or (5 ') and spacer ring (6) alternate combinations shown in Figure 5, the long spiral slot (J) of cutter spindle (7) is packed into the key cooperation in Fig. 3, becomes the box-like cutter of assembled group.Like this, just form several long spiral grooves at the cutter outer surface, as (S1) among Fig. 6 A, perhaps form the groove that several are made up of along spiral trajectory many segment parallel planes, as (S2) among Fig. 6 B, a kind of pattern in back does not influence the shredded paper effect.

The cross section of the long spiral groove among Fig. 6 can be a parallelogram shown in Figure 2, but also can be garden arc shown in Figure 4, and the relief angle of their horizontal cutting edges (f) all equals zero degree.

Claims

1, a kind of paper shredding cutters of file crushing machine is made up of a pair of cutter, and the horizontal cutting edge that this outside to cutter has several long spiral grooves to form is characterized in that:

(1) disalignment cutter axial line one segment distance [l] of each long spiral groove is to form the anterior angle of cutter traverse cutting edge [f];

(2) on the main shaft of assembled cutter [7], a long spiral slot [J] is arranged, each garden desk blade [5] and spacer ring [6] are alternately packed into along this long spiral slot [J], form several long spiral grooves of cutter outer surface, perhaps form the groove that several are made up of along spiral trajectory many segment parallel planes.

2, cutter according to claim 1 is characterized in that the anterior angle of horizontal cutting edge (f) is+40 °～+ 60 °.

3, cutter according to claim 1 and 2, the cross section that it is characterized in that several long spiral grooves of outer surface can be a parallelogram, also can be the garden arc, the relief angle of its horizontal cutting edge (f) is all zero degree.