CN217100773U - Pillow type packing machine without waste edge - Google Patents

Abstract

The utility model discloses a pillow type packaging machine without slitter edge, which comprises a paper separating mechanism for separating the whole paper film into a plurality of single-row paper films and a cutting mechanism for cutting off the transversely sealed material bag; the number of the paper separating knives arranged on the knife shaft is one less than that of the single-row paper films; the cutting tool part comprises a plurality of male dies arranged on a male die cross beam and a plurality of fixed female dies arranged on a female die cross beam, the fixed female dies are matched with movable female dies which slide mutually, the front end of each male die comprises a central cutting edge and an arc cutting edge protruding out of the front end of the central cutting edge, and the fixed female dies and the movable female dies are provided with upper and side cutting edges which are respectively matched with the central cutting edge and the arc cutting edge; when cutting is carried out, the male die beam drives the male die to reciprocate back and forth, the male die beam and the movable female die and the fixed female die on the female die beam cooperate to complete bag cutting action, and the cut sharp-corner waste is discharged from the waste discharge pipe. The utility model discloses guaranteed that the package material all does not have the material extravagant in length and width direction, reached the pillow formula packing of no slitter edge entirely.

Description

Pillow type packing machine without waste edge

Technical Field

The utility model relates to a equipment for packing, more specifically are a pillow formula packagine machine for back of body seal pillow formula bag packing, are applicable to trades such as medicine, food.

Background

At present, a lot of products in the industries of medicines, foods, milk powder and the like in the market are packaged and sold through pillow type bags, the sold pillow type bag products are exquisite in package, various in types and high in consumer selectivity, and a pillow type packaging machine is widely applied to the industry as pillow type bag production equipment.

The existing pillow type packaging machine has the advantages of rapid development and mature technology, and can meet the packaging requirements of a plurality of products. However, investigation shows that some waste materials are generated during production of the packaging machine, the waste material generation area mainly comprises the positions of the paper separating mechanism and the cutting mechanism, waste material edges are arranged on two sides of the paper separating mechanism, and each time one medicine bag is output by the cutting mechanism, a transverse sealing waste material edge is generated. Two wastes are waste of packing materials, and the property loss of enterprises can be caused in the past.

SUMMERY OF THE UTILITY MODEL

To above-mentioned prior art, consider that pillow package machine produces the waste material position, the utility model provides a do not have slitter edge pillow package machine's technical scheme entirely, the utility model discloses mainly carry out configuration optimization to the branch paper mechanism and the shutdown mechanism in the packagine machine to reach the no slitter edge mesh of production.

In order to solve the technical problem, the utility model provides a pillow type packaging machine without slitter edge, which comprises a paper separating mechanism for separating a whole paper film into a plurality of single-row paper films and a cutting mechanism for cutting off a transversely sealed material bag; the paper separating mechanism comprises a cutter shaft and a paper guide roller, wherein a plurality of paper separating knives are arranged on the cutter shaft, and the number of the paper separating knives arranged on the cutter shaft is one less than that of the single-row paper films; the cutting-off mechanism comprises an execution part, a cutting-off tool part and a positioning part, wherein the execution part of the cutting-off mechanism is the cutting-off tool part, the cutting-off tool part comprises a plurality of male die components arranged on a male die cross beam and a plurality of female die components arranged on a female die cross beam, and a limiting structure is arranged between the male die components and the female die components; the male die assembly comprises a floating connector and a male die, one end of the floating connector is fixed on the male die cross beam, the other end of the floating connector is provided with a male die mounting seat, the male die is mounted on the male die mounting seat, the front end of the male die comprises a central cutting edge, two sides of the central cutting edge are provided with arc cutting edges protruding out of the front end of the central cutting edge, and the outline of each arc cutting edge is formed by two arcs which are vertically and symmetrically arranged by a coincident line of the central cutting edge; the female die assembly comprises a fixed female die and a movable female die, the fixed female die is fixedly connected with a female die cross beam, the movable female die is in sliding fit with the fixed female die, a compression spring is arranged between the back surface of the movable female die and the female die cross beam, the lower edge in front of the fixed female die is aligned with the central cutting edge on the male die, a left groove and a right groove which are vertically and symmetrically arranged are arranged on the contact surface of the fixed female die and the movable female die, the front projections of the inner side surfaces of the two grooves are in a sharp-angled shape, and the outline of the sharp-angled shape is matched with the outline of the arc cutting edge on the male die; the limiting structure comprises an adjusting screw and a limiting piece, the adjusting screw is arranged on the male die mounting seat, the limiting piece is arranged in front of the movable female die, a through hole is formed in the limiting piece, and the through hole is coaxial with the adjusting screw; the front end of the adjusting screw is closer to the front than the position of the central cutting edge of the male die 6; the back of the female die beam is provided with a slope, the slope is positioned at a position lower than the movable female die, and grooves which are symmetrically arranged up and down between the contact surfaces of the fixed female die and the movable female die form a channel leading to the slope; the back of the female die beam is provided with a waste discharge pipe communicated with all the channels; when the cutting-off is executed, the male die beam drives the male die to reciprocate back and forth, the male die beam and the movable female die and the fixed female die on the female die beam cooperate to complete the bag cutting-off action, and the cut-off sharp-corner waste is discharged from the waste discharge pipe.

Further, no slitter edge pillow formula packagine machine, wherein:

the positions of the two paper separating knives arranged on the outermost side of the cutter shaft are consistent with the position of the inner side edge of the single-row paper film on the outermost side.

The structure of sliding fit between the movable female die and the fixed female die is as follows: the lower end of the fixed female die is provided with an opening, two inner side surfaces of the opening are provided with opposite sliding grooves, and two outer sides of the movable female die are provided with sliding blocks in sliding fit with the sliding grooves.

The front end of the male die is a plug with two protruding sides, the arc cutting edge is positioned on the inner side of the middle section of the plug on each side, and the profile of the arc cutting edge on each side is matched with the arcs at two ends of the transverse sealing edge of the material bag; the lower edge in front of the fixed female die is an upper cutting edge of the female die, and the front edge of the groove is a side cutting edge of the female die.

And the space formed by the grooves which are symmetrically arranged up and down between the contact surfaces of the fixed female die and the movable female die is matched with the cross section of the middle section of the male die.

The transversely sealed bag to be cut is attached to the front of the fixed female die and the movable female die, when cutting is carried out, the male die beam drives the male die to move forwards, the plugs on the two sides of the front end of the male die are inserted into the left groove and the right groove between the contact surfaces of the fixed female die and the movable female die, the arc cutting edge contacts the bag and cuts forwards along with the advancing of the male die, after the arc cutting edge contacts the side cutting edge of the female die, sharp corners with the same profile as the arc cutting edge are cut on the two sides of the bag, and waste materials of the sharp corners enter the waste discharge pipe along the slope on the back of the female die beam and are discharged; the male die continuously cuts in, before the central cutting edge of the male die contacts the bag, the adjusting screw penetrates through the through hole in the limiting sheet to prop against the movable female die, when the central cutting edge of the male die contacts the bag and begins to match with the upper cutting edge of the female die to begin to cut the bag, the movable female die retreats by a safe distance under the pushing of the adjusting screw, and only the shearing action of the central cutting edge of the male die and the upper cutting edge of the female die of the fixed female die is carried out at the moment; when the male die cross beam moves forwards to a proper position, a bag cutting action is completed, and then a return action is performed; in the return stroke, the compression spring pushes the movable female die back to the initial position along with the retraction of the male die.

The die is characterized in that a round hole is formed in the die cross beam, a round pin with a nail cap is arranged in the round hole, a fixing groove is formed in the back face of the movable die, one end of a compression spring abuts against the step face of the nail cap of the round pin, and the other end of the compression spring abuts against the inside of the fixing groove in the back face of the movable die.

Compared with the prior art, the beneficial effects of the utility model are that:

because the utility model discloses pillow type packagine machine peculiar branch paper structure and shutdown mechanism have guaranteed can not produce unnecessary useless waste material in producing, make all packing materials all use on the product package, because the utility model discloses the distinctive branch paper mechanism and the shutdown mechanism of packagine machine can make single-row paper membrane 4 of outermost both sides also be qualified packing paper membrane of treating after the branch paper, and only produce the waste material corner that the bag fillet can not avoid at subsequent cutting-off process, use the utility model discloses not only avoided current pillow type packagine machine at the ascending material of length direction of packing material extravagant, but also overcome because cut off the horizontal sealing waste material strake that produces for the blanking of face contact among the prior art to manufacturing cost has been practiced thrift. The utility model discloses make pillow packagine machine's package material stop unnecessary material extravagant in length and width direction, reach the standard of no slitter edge pillow packagine machine entirely. The driving and controlling of the paper separating mechanism and the cutting mechanism in the present invention belong to the common general knowledge in the art, and are not described herein.

The utility model discloses can be used for reforming transform, optimizing current pillow formula packagine machine, do not receive other process actuating mechanism's structural constraint, be suitable for and use widely.

Drawings

FIG. 1 is a schematic structural view of a paper separating mechanism of the present invention;

FIG. 2 is a schematic view of a conventional paper film segmentation;

FIG. 3 is a schematic view of the paper film cutting mechanism of the present invention;

FIG. 4 is a schematic view of a cutting mechanism of the present invention;

FIG. 5 is a schematic side sectional view of a cutting blade member of the middle cutting mechanism of the present invention;

FIG. 6 is a schematic perspective view of a male mold, a fixed female mold and a movable female mold in the cutting blade member shown in FIG. 5;

FIG. 7 is a cross-sectional view of the junction of the male die and the fixed and movable female dies shown in FIG. 6;

fig. 8 is a sectional view of a coupling portion of the fixed die and the movable die shown in fig. 6.

In the figure:

1-paper separating knife 2-paper guide roller 3-whole paper film 4-single-row paper film

5-material edge 6-male die 7-waste discharge pipe 8-female die beam

9-male die beam 61-central cutting edge 10-fixed female die 11-compression spring

12-movable female die 13-bag 14-adjusting screw 15-male die mounting seat

16-floating joint 62-arc cutting edge 17-via hole 18-limiting piece

Detailed Description

The present invention will be further described with reference to the following drawings and specific examples, but the following examples are by no means limiting the present invention.

The utility model provides a do not have slitter edge pillow formula packagine machine, this packagine machine is including dividing paper mechanism and shutdown mechanism.

As shown in fig. 1, 2 and 3, the paper separating mechanism is used for uniformly separating the whole paper film 3 into a plurality of single-row paper films 4, and the number of the separated rows is the same as that of the pillow type packaging machine. The paper separating mechanism comprises a cutter shaft and a paper guide roller 2, a plurality of paper separating knives 1 are arranged on the cutter shaft, waste edges can be generated on the left side and the right side of the traditional paper separating mechanism when paper is separated, as shown in figure 2, the number of the paper separating knives 1 arranged on the cutter shaft is 1 more than that of single-row paper films 4, left-right jumping can occur when the whole paper film 3 runs, and a strip material edge 5 is cut off on two sides generally in order to ensure the integrity of the single-row paper films 4 on the outermost sides. This forms a scrap edge in the longitudinal direction. The utility model discloses a get rid of branch paper sword 1 of outermost both sides, as shown in fig. 3, the number that sets up branch paper sword 1 on the arbor is less one than the number of single-row paper membrane 4, and set up on the arbor two positions that divide paper sword 1 in the outside unanimous with the inboard edge position of single-row paper membrane 4 in the outside, and rely on pillow type packagine machine self stability to overcome whole paper membrane 3 and vertically feed about the in-process and beat, guarantee the stability of whole paper membrane 3 vertical paper feed, the single-row paper membrane 4 that makes outermost both sides is qualified packing paper membrane of treating promptly.

The cutting mechanism is used for cutting the transversely-sealed material bag into single independent packages, the executing part of the cutting mechanism is a cutting knife part, as shown in fig. 4 and 5, the cutting knife part comprises a plurality of male die assemblies arranged on a male die beam 9 and a plurality of female die assemblies arranged on a female die beam 8, and a limiting structure is arranged between the male die assemblies and the female die assemblies. The bag cutting machine is characterized in that the male die assembly is provided with a male die 6 capable of reciprocating back and forth, the female die assembly is provided with a fixed female die 10 fixed on a female die cross beam 8 and a movable female die 12 which is in sliding fit with the fixed female die 10 and capable of reciprocating back and forth, when cutting is carried out, the male die cross beam 9 drives the male die 6 to reciprocate back and forth, and the movable female die 12 and the fixed female die 10 on the female die cross beam 8 cooperate to complete bag cutting.

The structure of the male die assembly in the middle cutting mechanism of the utility model is shown in figure 5, figure 6 and figure 7, the male die assembly comprises a floating joint 16 and a male die 6, one end of the floating joint is fixed on the male die cross beam 9, the other end of the floating joint 16 is provided with a male die mounting seat 15, the male die 6 is mounted on the male die mounting seat 15,

as shown in fig. 6, the front end of the male die 6 is a plug with two protruding sides, the front end of the male die 6 includes a central cutting edge 61, two sides of the central cutting edge 61 are provided with arc cutting edges 62 protruding from the front end of the central cutting edge 61, the arc cutting edges 62 are located at the inner sides of the middle sections of the plugs at each side, the profile of the arc cutting edge 62 at each side is formed by two arcs which are vertically symmetrically arranged by a coincident line of the central cutting edge 61, and the profile of the arc cutting edge 62 at each side is matched with the arcs at two ends of the transverse sealing edge of the pocket.

As shown in fig. 8, the die assembly includes a fixed die 10 and a movable die 12, the fixed die 10 is fixedly connected with the die beam 8, the movable die 12 is in sliding fit with the fixed die 10, and the structure is as follows: as shown in fig. 8, an opening is provided at the lower end of the fixed female die 10, two inner side surfaces of the opening are provided with opposite sliding grooves, and two outer sides of the movable female die 12 are provided with sliding blocks in sliding fit with the sliding grooves. The back of activity die 12 with be equipped with compression spring 11 between the die crossbeam 8, as shown in fig. 5, be equipped with the round hole on the die crossbeam 8, be equipped with the round pin that has the head of a nail in the round hole, the back of activity die 12 is equipped with the fixed slot, compression spring 11's one end top is on the head of a nail step face of round pin, compression spring 11's the other end top is in the fixed slot at activity die 12 back.

The lower edge in front of the fixed female die 10 is aligned with the central cutting edge 61 on the male die 6, and the lower edge in front of the fixed female die 10 is the upper cutting edge of the female die. As shown in fig. 6 and 8, the contact surfaces of the fixed female die 10 and the movable female die 12 are provided with a left groove and a right groove which are vertically and symmetrically arranged, as shown in fig. 7, the front projections of the inner side surfaces of the two grooves are in a pointed shape, the outline of the pointed shape is matched with the outline of the arc cutting edge 62 on the male die 6, the front edge of the groove is the side cutting edge of the female die, and the space formed by the grooves which are vertically and symmetrically arranged between the contact surfaces of the fixed female die 10 and the movable female die 12 is matched with the cross section shape of the middle section of the male die 6. As shown in fig. 5, a slope is arranged on the back surface of the die beam 8, the slope is positioned lower than the movable die 12, and grooves which are symmetrically arranged up and down and are arranged between the contact surfaces of the fixed die 10 and the movable die 12 form a channel leading to the slope; and a waste discharge pipe 7 communicated with all the channels is arranged on the back of the female die beam 8.

As shown in fig. 5, the male die 6 is mounted on the male die cross beam 9 through a male die mounting seat 15 and a floating joint 16, the limiting structure of the limiting structure in the present invention includes two symmetrically arranged adjusting screws 14 below the male die mounting seat 15 and two symmetrically arranged limiting pieces 18 in front of the movable female die 12, a via hole 17 is provided on the limiting piece 18, and the via hole 17 is coaxial with the adjusting screw 14; the front end of the adjusting screw 14 is located forward of the central cutting edge 61 of the punch 6. The utility model discloses in, fixed die 10 with die crossbeam 8 is immovable, activity die 12 is installed on two spouts of fixed die 10, can slide around the spout, and the compression spring 11 that sets up between activity die 12 and die crossbeam 8, as shown in fig. 5, under the effect of this compression spring 11 tension, it is ejecting to keeping away from die crossbeam 8 direction (forward promptly) with activity die 12, because the outside of activity die 12 has stopper piece 18 to block activity die 12, finally make it slide in the stroke of restriction, as shown in fig. 6 and fig. 7.

The bag 13 that waits to cut off that the preface packing was accomplished pastes the place ahead of fixed die 10 and movable die 12 is waited to cut off, when carrying out the cutting off, terrace die crossbeam 9 drives terrace die 6 reciprocating motion back and forth, with movable die 12 and fixed die 10 on the die crossbeam 8 cooperate the action to accomplish the bag and cut off the action, and the closed angle waste material after cutting off is discharged from waste pipe 7 of discharging. The specific process is as follows: the punch cross beam 9 drives the punch 6 to move forwards, and because the middle sections of the two plugs of the punch 6 with the arc cutting edges 62 are respectively matched with the channels formed by the left and right grooves of the fixed female die 10 and the movable female die 12, the plugs at the two sides of the front end of the punch 6 are inserted into the left and right grooves between the contact surfaces of the fixed female die 10 and the movable female die 12 in the process that the punch cross beam 9 drives the punch 6 to move forwards; with the advance of the punch 6, the arc cutting edge 62 contacts the bag 13 and cuts forward, after the arc cutting edge 62 contacts the side cutting edge of the die, a sharp corner is cut off at each of two sides of the bag 13, a sharp corner gap (namely the arc corner of the bag 13) with the same profile as the arc cutting edge 62 is formed, and the dropped sharp corner waste enters the waste discharge pipe 7 along the slope at the back of the die beam 8 and is discharged; the male die 6 is continuously cut in forwards, before the central cutting edge 61 of the male die 6 contacts the bag 13, the adjusting screw 14 penetrates through the through hole 17 on the limiting sheet 18 to prop against the movable female die 12, when the central cutting edge 61 of the male die 6 contacts the bag 13 and starts to cooperate with the upper cutting edge of the female die to start cutting the bag, the movable female die 12 is pushed back by the adjusting screw 14 for a safe distance, so that collision with the central cutting edge 61 is avoided, and at the moment, only the shearing action of the central cutting edge 61 of the male die 6 and the upper cutting edge of the female die of the fixed female die 10 is realized; when the male die cross beam 9 moves forwards to a proper position, a bag cutting action is completed, and then a return action is performed; during return stroke, along with the gradual withdrawal of the male die 6, the adjusting screw 14 gradually releases the movable female die 12 until the movable female die 12 is pushed back to the limiting sheet 18 by the compression spring 11, so that the movable female die 12 is pushed back to the initial position.

Because the utility model discloses distinctive branch paper mechanism and shutdown mechanism of packagine machine can make the single-row paper membrane 4 of outermost both sides also be qualified after the branch paper and treat the wrapping paper membrane, only produce the waste material corner that the bag fillet can not avoid in addition at subsequent cutting-off process, use the utility model discloses not only avoided current pillow type packagine machine to be extravagant at the ascending material of length direction of package material, but also overcome because cut off the horizontal sealing waste material strake that produces for the blanking of face contact among the prior art to manufacturing cost has been practiced thrift. The utility model discloses make pillow packagine machine's package material stop unnecessary material extravagant in length and width direction, reach the standard of no slitter edge pillow packagine machine entirely. The driving and controlling of the paper separating mechanism and the cutting mechanism in the present invention belong to the common general knowledge in the art, and are not described herein.

Although the present invention has been described with reference to the accompanying drawings, the present invention is not limited to the above embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many modifications without departing from the spirit of the present invention.

Claims (7)

1. A pillow type packaging machine without slitter edges comprises a paper dividing mechanism for dividing a whole paper film (3) into a plurality of single-row paper films (4) and a cutting mechanism for cutting off transversely-sealed material bags; the paper separating mechanism comprises a cutter shaft and a paper guide roller (2), and a plurality of paper separating cutters (1) are arranged on the cutter shaft; the execution part of the cutting mechanism is a cutting knife part; it is characterized in that the preparation method is characterized in that,

the number of the paper separating knives (1) arranged on the knife shaft is one less than that of the single-row paper films (4);

the cutting tool part comprises a plurality of male die components arranged on a male die cross beam (9) and a plurality of female die components arranged on a female die cross beam (8), and a limiting structure is arranged between the male die components and the female die components;

the male die assembly comprises a floating joint (16) and a male die (6), one end of the floating joint is fixed on the male die cross beam (9), the other end of the floating joint (16) is provided with a male die mounting seat (15), the male die (6) is mounted on the male die mounting seat (15), the front end of the male die (6) comprises a central cutting edge (61), two sides of the central cutting edge (61) are provided with arc cutting edges (62) protruding out of the front end of the central cutting edge (61), and the profile of each arc cutting edge (62) consists of two sections of arc lines which are symmetrically arranged up and down by the coincident line of the central cutting edge (61);

the female die assembly comprises a fixed female die (10) and a movable female die (12), the fixed female die (10) is fixedly connected with a female die cross beam (8), the movable female die (12) is in sliding fit with the fixed female die (10), a compression spring (11) is arranged between the back of the movable female die (12) and the female die cross beam (8), the lower edge in front of the fixed female die (10) is aligned with the central cutting edge (61) on the male die (6), the contact surface of the fixed female die (10) and the movable female die (12) is provided with a left groove and a right groove which are vertically and symmetrically arranged, the front projection of the inner side surfaces of the two grooves is in a sharp corner shape, and the outline of the sharp corner is matched with the outline of an arc cutting edge (62) on the male die (6);

the limiting structure comprises an adjusting screw (14) and a limiting sheet (18), the adjusting screw (14) is arranged on the male die mounting seat (15), the limiting sheet (18) is arranged in front of the movable female die (12), a through hole (17) is formed in the limiting sheet (18), and the through hole (17) is coaxial with the adjusting screw (14); the front end of the adjusting screw (14) is more front than the position of the central cutting edge (61) of the convex die (6);

the back of the female die cross beam (8) is provided with a slope, the slope is positioned at a position lower than the movable female die (12), and grooves which are symmetrically arranged up and down between the contact surfaces of the fixed female die (10) and the movable female die (12) form a channel leading to the slope; a waste discharge pipe (7) communicated with all the channels is arranged on the back of the female die cross beam (8);

when cutting is executed, the punch cross beam (9) drives the punch (6) to reciprocate back and forth, the punch cross beam and the movable die (12) and the fixed die (10) on the die cross beam (8) cooperate to complete bag cutting, and sharp-angled waste materials after cutting are discharged from the waste discharge pipe (7).

2. The full slitter-free pillow machine according to claim 1, wherein the two slitter knives (1) arranged on the knife axis at the outermost side are positioned in line with the inner side line of the single-row paper film (4) at the outermost side.

3. The full scrap-free pillow packaging machine according to claim 1, wherein the structure of sliding fit between the movable female die (12) and the fixed female die (10) is: the lower end of the fixed female die (10) is provided with an opening, two inner side surfaces of the opening are provided with opposite sliding grooves, and two outer sides of the movable female die (12) are provided with sliding blocks in sliding fit with the sliding grooves.

4. The full scrap edge-free pillow type packaging machine according to claim 1, wherein the front end of the male die (6) is a plug with two protruding sides, the arc cutting edge (62) is positioned at the inner side of the middle section of the plug at each side, and the profile of the arc cutting edge (62) at each side is matched with the arc shape of the two ends of the transverse sealing edge of the material bag; the lower edge in front of the fixed female die (10) is an upper cutting edge of the female die, and the front edge of the groove is a side cutting edge of the female die.

5. The full scrap-free pillow type packaging machine according to claim 4, wherein the space formed by the grooves which are symmetrically arranged up and down between the contact surfaces of the fixed female die (10) and the movable female die (12) is matched with the cross-sectional shape of the middle section of the male die (6).

6. Pillow packaging machine without slitter edges, according to claim 5, characterised in that the transversal sealed bag (13) to be cut is applied in front of the fixed (10) and movable (12) dies and, when cutting is performed,

the male die cross beam (9) drives the male die (6) to move forwards, plugs on two sides of the front end of the male die (6) are inserted into a left groove and a right groove between contact surfaces of the fixed female die (10) and the movable female die (12), the arc cutting edge (62) contacts the bag (13) and cuts into the bag forwards along with the advance of the male die (6), after the arc cutting edge (62) contacts with a side cutting edge of the female die, sharp-corner notches with the same profile as the arc cutting edge (62) are cut off on two sides of the bag (13), and sharp-corner waste materials enter the waste discharge pipe (7) along the slope on the back of the female die cross beam (8) and are discharged;

the male die (6) is continuously cut in forwards, the adjusting screw (14) penetrates through a through hole (17) in the limiting sheet (18) to prop against the movable female die (12) before the central cutting edge (61) of the male die (6) contacts the bag (13), when the central cutting edge (61) of the male die (6) contacts the bag (13) and starts to cut the bag by matching with the upper cutting edge of the female die, the movable female die (12) retreats for a safe distance under the pushing of the adjusting screw (14), and only the shearing action of the central cutting edge (61) of the male die (6) and the upper cutting edge of the female die of the fixed female die (10) is carried out at the moment;

when the male die cross beam (9) moves forwards in place, a bag cutting action is completed, and then a return action is performed; during return stroke, the compression spring (11) pushes the movable female die (12) back to the initial position along with the retraction of the male die (6).

7. The pillow type packaging machine without slitter edge as defined in claim 1, wherein the die beam (8) is provided with a circular hole, a round pin with a nail cap is arranged in the circular hole, the back surface of the movable die (12) is provided with a fixing groove, one end of the compression spring (11) is pressed against the step surface of the nail cap of the round pin, and the other end of the compression spring (11) is pressed against the fixing groove on the back surface of the movable die (12).

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