Edge folding device for polypropylene woven bag production

Abstract

The utility model discloses an edge folding device for polypropylene woven bag production, which comprises an operation plate, a supporting rod fixedly connected to the left side of the top of the operation plate, a mounting plate fixedly connected to the top end of the supporting rod, a sliding groove formed in the bottom of the mounting plate, a motor fixedly connected to the left side of the sliding groove, and a lead screw fixedly connected to an output shaft of the motor. The bottom of the sliding block is fixedly connected with an electric push rod, the telescopic end of the electric push rod is fixedly connected with a connecting plate, the side face of the connecting plate is rotationally connected with a plurality of pressing rollers, a negative pressure cavity is formed in the right side of the operation plate, through holes are formed in the top of the negative pressure cavity, and the multiple sets of through holes are distributed from left to right. The bottom of the operation plate is fixedly connected with a vacuum pump, edge folding and edge folding position pressing of the woven bag are integrated into one operation process, the operation steps are simplified, the operation process is simpler and more convenient, and edge folding and pressing work of the woven bag is more convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of woven bag production, and particularly relates to a hemming device for polypropylene woven bag production. Background Technique

[0002] The polypropylene woven bag is a common plastic woven bag. During the processing, after the raw material is processed into flat filaments, it is woven into a tube shape by a weaving device. Finally, the sewing edge at the bottom needs to be hemmed. The existing equipment for hemming woven bags, such as the patent application number 202320648028.0, discloses a hemming device for woven bag production, including a workbench, conveying rollers, a driving motor I, a pressing roller, etc. Through a pressing structure that can be lifted, when hemming the woven bag, the woven bag can be automatically pressed by the lowering of the pressing structure, thus avoiding the problem of the hem of the woven bag being skewed due to not being pressed during hemming.

[0003] For the above-mentioned disclosed hemming solution, the method of pressing down the woven bag by the pressing plate can solve the problem of skewed hemming of the woven bag. However, due to the existence of the pressing plate, after the woven bag is flipped by the hemming plate, it cannot directly press the hem. It needs to cooperate with the pressing plate for preliminary hemming, then move the woven bag, and finally cooperate with the conveying rollers and the pressing rollers to press the hem, resulting in a relatively cumbersome operation process and inconvenient for directly hemming and pressing the woven bag. Summary of the Utility Model

[0004] To solve the problems existing in the prior art, the utility model provides a hemming device for polypropylene woven bag production, which integrates the hemming of the woven bag and the pressing of the hem into one operation process, simplifies the operation steps, makes the operation process more convenient, and is more convenient for hemming and pressing the woven bag.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A hemming device for polypropylene woven bag production, including an operation board. The left side of the top of the operation board is fixedly connected with a support rod. The top of the support rod is fixedly connected with a mounting board. A chute is opened at the bottom of the mounting board. The left side of the chute is fixedly connected with a motor. The output shaft of the motor is fixedly connected with a lead screw. A slider threaded with the lead screw is slidably connected in the chute. The bottom of the slider is fixedly connected with an electric push rod. The telescopic end of the electric push rod is fixedly connected with a connecting plate. A plurality of pressing rollers are rotatably connected to the side of the connecting plate. A negative pressure cavity is opened inside the right side of the operation board. Through holes are opened at the top of the negative pressure cavity. The through holes are distributed in multiple groups from left to right. A plurality of through holes in each group are equidistantly distributed before and after. The bottom of the operation board is fixedly connected with a vacuum pump. The air inlet end of the vacuum pump extends into the negative pressure cavity.

[0007] Further, a placement groove is formed at the top of the operation board.

[0008] Further, an intake pipe is connected to the bottom of the negative pressure chamber, and a valve is installed on the intake pipe.

[0009] Further, a protective net is fixedly connected inside the through hole.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0011] 1. When the polypropylene raw material needs to be hemmed after being woven into a cylinder, the woven bag is laid flat on the operation board. Through the vacuum pump, the negative pressure chamber and the through hole, the woven bag is negatively adsorbed to fix its position. The electric push rod and the connecting plate enable multiple pressing rollers to move up and down. Cooperating with the motor, the lead screw, the slider and the chute, the pressing rollers can move horizontally left and right. Thus, during the movement of the pressing rollers, the woven bag is hemmed and pressed. Compared with the existing hemming scheme, the operation process is more convenient. The hemming and pressing of the hemming part of the woven bag are integrated into one operation process, simplifying the operation steps and making it more convenient to perform the hemming and pressing work on the woven bag.

[0012] 2. Through the placement groove, it is convenient to place the connecting plate and the pressing rollers below the upper surface of the operation board. Thus, when laying the woven bag flat, the area to be hemmed is conveniently located above the pressing rollers. Through the intake pipe and the valve, it is convenient to balance the negative pressure in the negative pressure chamber by introducing air after the woven bag processing is completed, facilitating the removal of the woven bag. The protective net prevents the woven bag from deforming when being negatively adsorbed and entering the through hole, thus facilitating the guarantee of the flat state of the woven bag. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic structural diagram of the present utility model;

[0014] Figure 2 is a top view structural diagram of the operation board of the present utility model;

[0015] In the figure: 1 operation board, 2 support rod, 3 mounting plate, 4 chute, 5 motor, 6 lead screw, 7 slider, 8 electric push rod, 9 connecting plate, 10 pressing roller, 11 negative pressure chamber, 12 through hole, 13 vacuum pump, 14 placement groove, 15 intake pipe, 16 protective net. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0017] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. Embodiment

[0018] See the attached Figure 1-2 As shown, a hemming device for the production of polypropylene woven bags includes an operation board 1. A support rod 2 is fixedly connected to the left side of the top of the operation board 1. The top end of the support rod 2 is fixedly connected to a mounting plate 3. A chute 4 is opened at the bottom of the mounting plate 3. A motor 5 is fixedly connected to the left side of the chute 4. The output shaft of the motor 5 is fixedly connected to a lead screw 6. A slider 7 that is threadedly connected to the lead screw 6 is slidably connected in the chute 4. An electric push rod 8 is fixedly connected to the bottom of the slider 7. The telescopic end of the electric push rod 8 is fixedly connected to a connecting plate 9. A plurality of pressing rollers 10 are rotatably connected to the side surface of the connecting plate 9. A negative pressure chamber 11 is opened inside the right side of the operation board 1. Through holes 12 are opened at the top of the negative pressure chamber 11. Multiple groups of through holes 12 are distributed from left to right, and multiple through holes 12 in each group are equidistantly distributed in the front and rear. A vacuum pump 13 is fixedly connected to the bottom of the operation board 1. The air inlet end of the vacuum pump 13 extends into the negative pressure chamber 11. A placement groove 14 is opened at the top of the operation board 1. An air inlet pipe 15 is communicated with the bottom of the negative pressure chamber 11. A valve is installed on the air inlet pipe 15. After processing is completed, the valve is opened, and the negative pressure chamber 11 is communicated with the outside through the air inlet pipe 15, thereby balancing the air pressure. In this way, the woven bag can be removed. A protective net 16 is fixedly connected inside the through hole 12, and the protective net 16 prevents the woven bag from being sucked into the through hole 12 by negative pressure.

[0019] Working principle: In the present utility model, when the polypropylene raw material needs to be hemmed after being woven into a cylinder, the woven bag is laid flat on the operation board 1. And the crease of the area to be hemmed of the woven bag corresponds to the leftmost set of through holes 12. At this time, the area of the woven bag that does not need to be hemmed is on the right side of the operation board 1, that is, above each through hole 12, and the area to be hemmed is above the placement groove 14, that is, above the pressing roller 10. Start the vacuum pump 13 to suck out the air in the negative pressure cavity 11. Then the negative pressure cavity 11 is in a negative pressure state approaching vacuum, adsorbing and fixing the woven bag above the through holes 12. Start the electric push rod 8 to drive the connecting plate 9 upward. The connecting plate 9 drives each pressing roller 10 upward. During the upward movement of the pressing roller 10, the area to be hemmed of the woven bag is lifted. The height at which the pressing roller 10 is lifted is the distance between the bottom side of the pressing roller 10 and the upper surface of the operation board 1, which is the thickness after the woven bag is folded in half. Then start the motor 5 to drive the lead screw 6 to rotate. The slider 7 rotates with the lead screw 6 and moves to the right along the chute 4. Through the electric push rod 8 and the connecting plate 9, the pressing roller 10 moves to the right synchronously with the slider 7. The area to be hemmed of the woven bag is turned over to the right as the pressing roller 10 moves. Since the woven bag in this area is not fixed, therefore, when folding, the crease is at the leftmost set of through holes 12. Thus, when the pressing roller 10 drives the woven bag to be hemmed, and the height of the pressing roller 10 is adapted to contact the thickness of the folded woven bag. During the movement of the pressing roller 10, it rolls and rubs against the woven bag, and rolls and presses the hemmed part to realize the hemming and pressing work of the woven bag.

[0020] The above shows and describes the basic principles, main features and advantages of the present utility model. For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model, and any reference signs in the claims should not be regarded as limiting the claims involved.

[0021] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A hemming device for the production of polypropylene woven bags, comprising an operation board (1), characterized in that: On the left side of the top of the operation panel (1), a support rod (2) is fixedly connected. The top end of the support rod (2) is fixedly connected with a mounting plate (3). A chute (4) is opened at the bottom of the mounting plate (3). A motor (5) is fixedly connected to the left side of the chute (4). The output shaft of the motor (5) is fixedly connected with a lead screw (6). A slider (7) that is in threaded connection with the lead screw (6) is slidably connected in the chute (4). The bottom of the slider (7) is fixedly connected with an electric push rod (8). The telescopic end of the electric push rod (8) is fixedly connected with a connecting plate (9). A plurality of pressure rollers (10) are rotatably connected to the side surface of the connecting plate (9). A negative pressure chamber (11) is opened inside the right side of the operation panel (1). A through hole (12) is opened at the top of the negative pressure chamber (11). There are multiple groups of the through holes (12) distributed from left to right. Multiple through holes (12) in each group are equidistantly distributed before and after. The bottom of the operation panel (1) is fixedly connected with a vacuum pump (13). The air inlet end of the vacuum pump (13) extends into the negative pressure chamber (11).

2. The hemming device for producing polypropylene woven bags according to claim 1, characterized in that: A placement groove (14) is opened at the top of the operation panel (1).

3. The hemming device for producing polypropylene woven bags according to claim 1, characterized in that: The bottom of the negative pressure chamber (11) is communicated with an air inlet pipe (15). A valve is installed on the air inlet pipe (15).

4. The hemming device for producing polypropylene woven bags according to claim 1, characterized in that: A protective net (16) is fixedly connected inside the through hole (12).

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