CN214495152U - Transverse punching knife for rolling cutting type folding machine - Google Patents

Abstract

The utility model discloses a transverse punching knife for a roll cutting type folding machine, which is arranged on a transverse folding roller and comprises a rectangular sheet-shaped knife body; a plurality of rectangular grooves are uniformly arranged at intervals at the front end part of the cutter body, so that a flat tooth-shaped cutter head is formed between the adjacent grooves; the length of each cutting head is twice the width of each groove; the front end of each cutter head is provided with a cutting edge, and the front end of each cutting edge is a cutter point. The utility model is used for roll horizontal punching knife of cutting out formula folding machine, the hole of beating can more do benefit to the quick discharge of air between the multilayer paper, eliminates the splayed fold of paper.

Description

Transverse punching knife for rolling cutting type folding machine

Technical Field

The utility model relates to a horizontal punching knife for rolling cutting type folding machine.

Background

The paper has threefold when roll cutting formula folding machine carries out sixty percent of open folding: the first is folded through the set-square for indulging folding, and the second is folded for the cross-folding, and eighty percent of a total of ten percent of a total of ten percent of a total of ten percent of ten total of ten percent of a total of one of ten total of ten percent of ten total. When multiple layers of paper are folded at the same time due to the fact that the paper is too thick, one or more pairs of splayed folds are easily formed on the multiple layers of paper in the closed crease at one end. The splayed folds generally appear at the second fold, namely the splayed crease, and are symmetrical by taking the sixteenmo crease as a center and are splayed. When the paper is folded, the paper on the inner side of the folding seam is compressed and tends to extend outwards, and because the paper at the closed end is connected together and cannot extend freely, splayed folds are formed when the stress is large enough, and the possibility of fold occurrence is higher when the paper is overlapped for a plurality of times, because the fold is caused because air in the overlapped paper cannot be released.

The current solution to wrinkles is generally to make a hole in the crease. But the size of the perforation interval also affects the wrinkle removing effect: the space is too large, and the air in the folded paste is not completely discharged to generate folds; if the distance is too small, the folded patch is easily cut.

The second folding perforating knife, also called the transverse perforating knife 10, is mostly strip-shaped and is mounted on the transverse perforator drum 100. The lateral punching blade 10 performs a punching operation in cooperation with the rubber strip 20 of the opposite cylinder 200 (see fig. 1) in accordance with the rotation of the punch cylinder 100.

The shape of the edge of a common transverse punching knife of a folding machine is a 90-degree pointed tooth shape (see fig. 1a and 1b), and the punching depth is usually 0.5-1 mm; in the case of a single paper path, the two sheets are folded in half (sheet thickness of 0.15 mm to 0.2 mm), and the opening sizes are such that the lower opening length B1 is about 1.2 mm and the upper opening length A1 is about 0.8 mm (see FIG. 2 a). Since the length a1 of the upper opening is shorter than the length B1 of the lower opening, the air path becomes narrower and the discharge speed becomes slower when the air is discharged from the lower opening to the upper opening.

When a single paper path is used, the length difference of the upper opening and the lower opening is not large, and the influence is not obvious. If when the paper path is changed, the thickness of the paper is doubled, the length of the lower opening B2 in the double paper path is the same as that of the lower opening B1 in the single paper path, the length of the upper opening A2 is reduced from 0.8 mm to 0.5 mm (see figure 2B), the length difference of the upper opening and the lower opening is increased, the air path outlet is narrower, the discharge speed is slower, and splayed wrinkles are easier to appear. In this case, if the length of the opening is increased, a method is used in which the depth of the punching is increased, but if the depth of the blade is too large, the time for which the blade is disengaged from the rubber band 20 is increased, and when the punching blade is rotated away, the paper sheet is easily taken toward the transverse puncher cylinder 100, and the paper sheet is wound around the transverse puncher cylinder 100.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's defect and provide a horizontal punching knife for rolling cut formula folding machine, the hole of its beating can more do benefit to the quick discharge of air between the multilayer paper, eliminates the splayed fold of paper.

The purpose of the utility model is realized like this: a transverse punching knife for a roll-cutting type folding machine is mounted on a transverse folding cylinder and comprises a rectangular sheet-shaped knife body; a plurality of rectangular grooves are uniformly arranged at intervals at the front end part of the cutter body, so that a flat tooth-shaped cutter head is formed between the adjacent grooves; the length of each cutting head is twice the width of each groove; the front end of each cutter head is provided with a cutting edge, and the front end of each cutting edge is a cutter point.

The transverse punching knife for the roll-cutting type folding machine is characterized in that the cutting edge is formed by respectively cutting an inclined plane with the same angle on the front side and the back side of the knife head, and the angle of the cutting edge is 15-20 degrees; the knife point is formed by cutting an inclined plane with the same angle on the front surface and the back surface of the knife edge respectively, and the angle of the knife point is 25-30 degrees.

The utility model discloses a horizontal punching knife for rolling cut formula folding machine has following characteristics:

the triangular tooth-shaped knife edge is changed into the flat tooth-shaped knife edge, the length of the punched holes cannot be reduced along with the increase of the number of the layers of the paper, the air discharge speed is influenced, the ratio of the length of each punched hole to the hole distance is larger, the quick discharge of air among multiple layers of paper is facilitated, and the splayed wrinkles of the paper are eliminated.

Drawings

FIG. 1 is a schematic view of a mounting arrangement for a cross punch blade of a roll-cut folder;

FIG. 1a is a plan view of a cross punch blade of a prior art roll-cut folder;

FIG. 1b is a side view of FIG. 1 a;

FIG. 2a is a cross-sectional view of a prior art cross-direction perforating knife perforating a single sheet of paper;

FIG. 2b is a cross-sectional view of a prior art cross-punch blade for punching a double-ply paper;

FIG. 3 is a plan view of a cross punch blade for a roll-cut folder of the present invention;

FIG. 4 is an enlarged view of the region Z in FIG. 3;

fig. 5 is a view from P-P in fig. 4.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

Referring to fig. 3 to 5, the horizontal punching blade for a roll type folding machine of the present invention is installed on a horizontal folding drum and includes a rectangular sheet-shaped blade body 10 ', and the thickness of the blade body 10' is 1.5mm to 2 mm; the front end part of the cutter body 10' is uniformly provided with a plurality of rectangular grooves at intervals, so that a flat tooth-shaped cutter head 11 is formed between the adjacent grooves; the length a of each cutting head 11 is twice the width of each groove B; the front end of each cutter head 11 is provided with a cutting edge 12, the cutting edge 12 is formed by respectively cutting the front surface and the back surface of the cutter head 11 to form inclined planes with the same angle, and the angle of the cutting edge 12 is 15-20 degrees; the knife edge 13 is formed by respectively cutting the front surface and the back surface of the knife edge 12 to form inclined planes with the same angle, and the angle of the knife edge 13 is 25-30 degrees.

The utility model discloses a horizontal punching knife for rolling cut-out formula folding machine adopts the flat profile of tooth edge of a knife, and the length in the hole that it was beaten can not become along with the change of the paper number of piles is many and diminish, influences the air exhaust velocity, and the length in every hole that beats simultaneously is bigger with occupying of hole interval, more does benefit to the quick discharge of air between the multilayer paper, eliminates the splayed fold of paper.

The above embodiments are provided only for the purpose of illustration, not for the limitation of the present invention, and those skilled in the relevant art can make various changes or modifications without departing from the spirit and scope of the present invention, therefore, all equivalent technical solutions should also belong to the scope of the present invention, and should be defined by the claims.

Claims (2)

1. A transverse punching knife for a roll-cutting type folding machine is arranged on a transverse folding roller and comprises a rectangular sheet-shaped knife body, and is characterized in that a plurality of rectangular grooves are uniformly arranged at intervals at the front end part of the knife body, so that a flat-tooth-shaped knife head is formed between the adjacent grooves; the length of each cutting head is twice the width of each groove; the front end of each cutter head is provided with a cutting edge, and the front end of each cutting edge is a cutter point.

2. The cross punch blade for a roll-cut folder as recited in claim 1 wherein the blade edge is formed by cutting an inclined plane having the same angle on each of the front and back sides of the blade head, and the angle of the blade edge is 15 ° to 20 °; the knife point is formed by cutting an inclined plane with the same angle on the front surface and the back surface of the knife edge respectively, and the angle of the knife point is 25-30 degrees.

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