A bag mouth inward curling machine

Abstract

The present invention discloses a bag mouth inward curling machine, which comprises a frame. A conveyor belt mechanism, a bag opening mechanism, an inner wheel extending and pressing mechanism, a bag mouth holding mechanism, a hemming mechanism, a bag bottom rotating mechanism, and an ultrasonic welding module are further arranged on the frame. The conveyor belt mechanism is arranged along the radial direction of the bag mouth and comprises a conveyor belt and a plurality of rollers, and the rollers are driven by a motor. The bag opening mechanism consists of an upper bag opening plate, a lower bag opening plate, and a bag opening cylinder. The upper bag opening plate is installed on the bag opening cylinder, and the upper bag opening plate and the lower bag opening plate are connected to a negative pressure fan. The inner wheel extending and pressing mechanism is arranged at the axial center of the front part of the bag mouth, and a bag mouth axial track is arranged thereon. A plurality of inner wheel extending sliders are installed on the bag mouth axial track, and a plurality of freely rotatable inner driven wheels are suspended on the inner wheel extending sliders. The connection mode of the inner driven wheels is swing arm connection or track suspension connection, and the inner wheel extending sliders are driven by a cylinder or a motor.

Description

Technical Field

[0001] The present invention relates to the technical field of packaging machinery, and particularly to an inner-rolling machine for the bag mouth of a packaging bag. Background Art

[0002] For some packaging bags, the bag mouth needs to be rolled inward for one week and then sealed. Currently, this process can only be completed manually and cannot be automated; manual rolling is time-consuming and laborious, and the quality of the rolled mouth varies. Summary of the Invention

[0003] In view of the above problems, the present invention provides an inner-rolling machine for the bag mouth.

[0004] In order to achieve the object of the present invention, the technical solution adopted by the present invention is as follows:

[0005] Design an inner-rolling machine for the bag mouth, including a frame, characterized in that: a conveyor belt mechanism, a bag-opening mechanism, an inner wheel extending and pressing mechanism, a bag-mouth holding mechanism, a hemming mechanism, a bag-bottom rotating mechanism, and an ultrasonic welding module are further arranged on the frame; the conveyor belt mechanism is arranged along the radial direction of the bag mouth and includes a conveyor belt and a plurality of rollers, and the rollers are driven by a motor; the bag-opening mechanism is composed of an upper bag-opening plate, a lower bag-opening plate, and a bag-opening cylinder, the upper bag-opening plate is installed on the bag-opening cylinder, and the upper bag-opening plate and the lower bag-opening plate are connected to a negative pressure fan; the inner wheel extending and pressing mechanism is arranged at the axial center of the front part of the bag mouth, and a bag-mouth axial track is arranged thereon, and a plurality of inner wheel extending sliders are installed on the bag-mouth axial track, and a plurality of freely rotatable inner driven wheels are suspended on the inner wheel extending sliders, and the connection mode of the inner driven wheels is swing arm connection or track suspension connection, and the inner wheel extending sliders are driven by a cylinder or a motor; a bag-mouth axial track is arranged on the bag-mouth holding mechanism, and a plurality of axial sliders are installed on the axial track, and a tensioning cylinder arranged along the radial direction of the bag mouth is fixed on the axial sliders, and a holding optical axis along the axial direction of the bag mouth is installed on the tensioning cylinder, and the bag-mouth holding mechanism is symmetrically arranged on the left and right sides of the bag mouth; the hemming mechanism is composed of a 90-degree hemming device and a 180-degree hemming device, the 90-degree hemming device is a bent plate from 0 degrees to 90 degrees and can move up and down, and the upper limit is higher than the lower layer of the bag mouth, the 180-degree hemming device is a bent plate from 90 degrees to 180 degrees and is installed at the front part of the bag mouth, behind the 90-degree hemming device, and can move back and forth along the axial direction of the bag mouth, and the forward limit contacts the lower layer of the bag mouth; the ultrasonic welding module is installed behind the 180-degree hemming device.

[0006] Preferably, the connection between the inner driven wheel of the suspension and the swing arm of the slider is that a rotating shaft is provided on the slider, a rotating swing arm is provided on the rotating shaft, one end of the rotating swing arm is installed with the driven wheel, and the other end is floatingly connected to the cylinder; the connection between the inner driven wheel of the suspension and the track suspension of the slider is that a driven wheel upper and lower track and a slider are provided on the slider, and the inner driven wheel is connected to the slider of the driven wheel upper and lower track through a cantilever.

[0007] Preferably, a bag bottom rotating mechanism is provided near the bag bottom on the material platform, and the bag bottom rotating mechanism is composed of a bag bottom clip and a bag bottom rotating shaft, and the bag bottom clip is installed on the bag bottom rotating shaft.

[0008] Preferably, a plurality of bearings are sleeved on the holding optical axis. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 is the front view of the present invention;

[0010] Figure 2 is the left view of the present invention;

[0011] Figure 3 is the top view of the present invention;

[0012] Figure 4 is the conveyor belt mechanism of the present invention;

[0013] Figure 5 is the inner wheel extending and pressing mechanism of the present invention;

[0014] Figure 6 is the bag mouth holding mechanism of the present invention;

[0015] Figure 7 is the hemming mechanism of the present invention.

[0016] In the figure: 1 is the conveyor belt mechanism, 2 is the bag opening mechanism, 3 is the inner wheel extending and pressing mechanism, 4 is the bag mouth holding mechanism, 5 is the hemming mechanism, 6 is the bag bottom rotating mechanism, 7 is the ultrasonic module, 11 is the conveyor belt roller, 12 is the conveyor belt, 13 is the material platform, 21 is the upper bag opening plate, 22 is the lower bag opening plate, 23 is the bag opening cylinder, 31 is the inner driven wheel; 32 is the swing arm; 33 is the rotating shaft; 34 is the extending slider; 35 is the extending track, 36 is the swing arm cylinder, 41 is the axial slider, 42 is the holding optical axis, 43 is the tensioning cylinder, 51 is the 90-degree hemming device, 52 is the 180-degree hemming device, 61 is the bag bottom clip, 62 is the bag bottom rotating shaft. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with the drawings and embodiments. The embodiments are only used to explain the present invention and do not limit the protection scope of the present invention.

[0018] Embodiment: As shown in the figure, when the opening of the packaging bag reaches the designated position on the material platform 13, the upper bag-opening plate 21 moves downward under the action of the bag-opening cylinder 23 and contacts the upper layer of the bag opening. At the same time, the negative pressure control valve is opened. When the upper bag-opening plate 21 adsorbs the upper layer of the bag opening, it moves upward, and the lower bag-opening plate 22 adsorbs the lower layer of the bag opening to complete the bag-opening process. Subsequently, the inner wheel extends into the slider 34 and moves forward (in the direction of the bag opening) until the swing arm 32 and the inner driven wheel 31 extend into the bag opening by a certain distance. At this time, the swing arm 32 forms a small angle (1 - 10 degrees) with the material platform 13. When the inner driven wheel 31 is in place, the swing arm cylinder 36 acts, causing the inner driven wheel 31 to rotate downward and press tightly. At this time, the swing arm 32 is parallel to the material platform 13, and the inner driven wheel 31 presses the lower layer of the bag opening tightly on the conveyor belt 12.

[0019] While the inner wheel extends into the pressing mechanism 3, the axial slider 41 of the bag-opening holding mechanism 4 also moves toward the bag opening. When the holding optical axis 42 extends into the bag opening by a certain distance (usually 5 - 10 cm), the tensioning cylinder 43 acts, causing the holding optical axis 42 to move radially along the bag diameter to tension the bag opening. A number of bearings are also sleeved on the holding optical axis to reduce the frictional resistance, and the bag-opening holding mechanism 4 is arranged symmetrically about the bag opening on the left and right. At the same time, the 90-degree edge folder 51 moves upward, contacts the lower layer of the bag opening, and folds a part of the middle of the lower layer of the bag opening by 90 degrees. Subsequently, the 180-degree edge folder 52 moves forward and contacts the part of the bag opening folded by the 90-degree edge folder 51, so that the part of the bag opening after passing through the 90-degree edge folder 51 is folded by 180 degrees. An ultrasonic welding module 7 is arranged after the 180-degree edge folder 52.

[0020] The edge-folding mechanism 5 consists of 2 separate edge folders, attached Figure 7 Only showing the situation when the 90-degree edge folder 51 and the 180-degree edge folder 52 are in place.

[0021] After the inner wheel extends into the pressing mechanism 3, the bag-opening holding mechanism 4, and the edge-folding mechanism 5 are all in place, the conveyor belt 12 is started, and the bag opening rotates automatically under the drive of the conveyor belt 12 and the inner driven wheel 31. During the rotation, each part of the bag opening passes through the edge-folding mechanism 5 in turn. After passing through the edge-folding mechanism, the bag opening is in a 180-degree folded state and is welded and shaped by the ultrasonic module 7.

[0022] After the bag opening rotates one week, the inner-rolled mouth operation can be completed. At this time, the inner wheel extends into the pressing mechanism 3, the bag-opening holding mechanism 4, and the edge-folding mechanism 5 are withdrawn back to their original positions, and the upper bag-opening plate 21 presses down to reset the bag opening. Thus, the inner-rolling process of the bag opening of one packaging bag is completed. When the whole packaging bag is too long, to prevent the bag body from being distorted, the bag bottom clip 61 is used to clamp the bag bottom, and the motor drives the bag bottom rotating shaft 62 to rotate automatically following the bag opening.

[0023] Figure 5The inner follower wheel 31 of the inner wheel extending into the pressing mechanism 3 shown is only an example. Its main function is to press the bag mouth against the conveyor belt 12 to make the bag mouth rotate. The number can be from 1 to several, and they can be symmetrically arranged or asymmetrically arranged.

[0024] Another form of the inner wheel extending into the pressing mechanism 3 is that the inner follower wheel 31 is fixed on the slider of the vertical track. After the slider 34 extends in place, the inner follower wheel 31 presses down vertically.

[0025] The basic principles, main features and advantages of the invention have been shown and described above. The embodiments disclosed in the present invention are preferred embodiments, but not limited to this. Those of ordinary skill in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. As long as they do not depart from the spirit of the present invention, they are within the protection scope of the present invention.

Claims

1. A bag mouth inward curling machine, comprising a frame, characterized in that: The frame is further provided with a conveyor belt mechanism, a bag opening mechanism, an inner wheel extending and pressing mechanism, a bag mouth holding mechanism, a hemming mechanism, a bag bottom rotating mechanism, and an ultrasonic welding module; the conveyor belt mechanism is arranged radially along the bag diameter, including a conveyor belt and a plurality of rollers, and the rollers are driven by a motor; the bag opening mechanism consists of an upper bag opening plate, a lower bag opening plate and a bag opening cylinder, the upper bag opening plate is installed on the bag opening cylinder, and the upper bag opening plate, the lower bag opening plate are connected to a negative pressure fan; the inner wheel extending and pressing mechanism is arranged at the axial center of the front part of the bag mouth, and is provided with a bag mouth axial track, and a plurality of inner wheel extending sliders are installed on the bag mouth axial track, and a plurality of freely rotatable inner driven wheels are suspended on the inner wheel extending sliders, and the connection mode of the inner driven wheels is swing arm connection or track suspension connection, and the inner wheel extending sliders are driven by a cylinder or a motor; the bag mouth holding mechanism is provided with a bag mouth axial track, and a plurality of axial sliders are installed on the axial track, and a tensioning cylinder arranged radially along the bag diameter is fixed on the axial sliders, and a holding optical axis along the bag mouth axis is installed on the tensioning cylinder, and the bag mouth holding mechanism is symmetrically arranged on the left and right sides of the bag mouth; the hemming mechanism consists of a 90-degree hemming device and a 180-degree hemming device, the 90-degree hemming device is a bending plate from 0 degrees to 90 degrees, which can move up and down, and the upper limit is higher than the lower layer of the bag mouth, the 180-degree hemming device is a bending plate from 90 degrees to 180 degrees, which is installed in the front part of the bag mouth, behind the 90-degree hemming device, and can move back and forth along the bag mouth axis, and the forward limit contacts the lower layer of the bag mouth; the ultrasonic welding module is installed behind the 180-degree hemming device; the swing arm connection of the suspended inner driven wheel and the slider is that a rotating shaft is arranged on the slider, a rotating swing arm is arranged on the rotating shaft, one end of the rotating swing arm is installed with a driven wheel, and the other end is floatingly connected with a cylinder; the track suspension connection of the suspended inner driven wheel and the slider is that the slider is provided with a driven wheel up and down track and a slider, and the inner driven wheel is connected with the slider of the driven wheel up and down track through a cantilever; a bag bottom rotating mechanism is arranged near the bag bottom on the material platform, and the bag bottom rotating mechanism consists of a bag bottom clip and a bag bottom rotating shaft, and the bag bottom clip is installed on the bag bottom rotating shaft.

2. A bag mouth inward curling machine according to claim 1, further characterized in that: A plurality of bearings are sleeved on the holding optical axis.

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