Bag making device

Abstract

A bag making device is provided, which comprises, along the moving direction of the packaging film, in sequence: a film roll, a shaping mechanism, a film feeding mechanism, a sealing and cutting mechanism and a bag supporting mechanism, wherein the shaping mechanism comprises two opposite protrusions and a partition plate, and the partition plate is arranged downstream of the two protrusions; the film feeding mechanism comprises a driving wheel, and the driving wheel is arranged downstream of the two protrusions and is located beside the partition plate; the sealing and cutting mechanism comprises a second edge heat sealing strip corresponding to the second edge of the packaging bag, a bottom edge heat sealing strip corresponding to the bottom edge of the packaging bag, and a cutter corresponding to the top edge of the packaging bag; the bag supporting mechanism comprises a receiving cavity, and the receiving cavity comprises a first narrow groove for receiving the first edge, a second narrow groove for receiving the second edge, and a first arc surface and a second arc surface for supporting the two side surfaces of the packaging bag, and the distance between the first narrow groove and the second narrow groove gradually shortens from upstream to downstream.

Description

Technical Field

[0001] The present invention generally relates to the field of packaging, and more specifically, to a bag-making device for Chinese medicine granules. Background Art

[0002] At present, the opening method of the film bag of granular medicine packaging in the prior art mainly relies on manually or mechanically putting the bag on a device with a fixed shape, which has a relatively complex structure and is prone to failure. Therefore, it is necessary to develop a device for opening and stabilizing the opened state of the film bag to solve the above-mentioned prior art problems. Summary of the invention

[0003] In one aspect, the present application provides a bag making device, characterized in that, along the moving direction of the packaging film, it includes: a film roll, a shaping mechanism, a film feeding mechanism, a sealing and cutting mechanism, and a bag supporting mechanism, wherein:

[0004] The shaping mechanism comprises two opposite protrusions and a partition plate, wherein the partition plate is arranged downstream of the two protrusions in the moving direction of the packaging film, so that the sealed first side of the packaging film passes between the two protrusions and then the packaging film passes through both sides of the partition plate;

[0005] The film feeding mechanism comprises a driving wheel, which is arranged downstream of the two protrusions in the moving direction of the packaging film and located beside the partition plate, and drives the packaging film to feed the sealing and cutting mechanism downstream thereof;

[0006] The sealing and cutting mechanism comprises a second edge heat sealing strip corresponding to the second edge of the packaging bag, a bottom edge heat sealing strip corresponding to the bottom edge of the packaging bag, and a cutter corresponding to the top edge of the packaging bag, for sealing the second edge and the bottom edge to form a packaging bag, and for cutting the packaging bag from the packaging film after the packaging bag enters the bag supporting mechanism;

[0007] The bag holding mechanism includes a receiving cavity, which includes a first narrow groove for receiving the first edge, a second narrow groove for receiving the second edge, and a first curved surface and a second curved surface for supporting two side surfaces of the packaging bag. The distance between the first narrow groove and the second narrow groove gradually shortens from upstream to downstream, so that the top open end of the packaging bag received in the receiving cavity is opened.

[0008] The two protrusions of the shaping mechanism destroy the direction of the surface tension between the packaging films, creating conditions for the subsequent packaging bag to open after entering the bag holding mechanism. The bag holding mechanism is configured to have two opposite narrow slots, and the distance between the narrow slots gradually shortens from upstream to downstream, thereby squeezing the two side films of the packaging bag, so that under the guidance of surface tension, the opening is formed and maintained along the first curved surface and the second curved surface. Through the cooperation of the above devices, an open packaging bag can be directly formed after bag making, thereby reducing the special opening mechanism and avoiding contamination of the inside of the packaging bag. In addition, the bag holding mechanism can bring the packaging bag into the dispensing device, which is convenient for the dispensing of Chinese medicine particles.

[0009] In some embodiments, the curvature of the first curved surface and the second curved surface gradually increases from upstream to downstream, the distance between the first curved surface and the second curved surface gradually shortens from upstream to downstream, and the width of the first narrow groove and the second narrow groove gradually narrows from upstream to downstream, and remains constant after being narrowed to slightly larger than the thickness of the packaging film. By setting the width of the narrow groove, the first and second edge slopes of the packaging bag entering the bag holding mechanism from the sealing and cutting mechanism are collected into the narrow groove of the bag holding mechanism, which can improve the fault tolerance of the sealing and cutting mechanism and the bag holding mechanism, reduce processing accuracy, and reduce costs. It can also improve the success rate of cooperation between the bag holding mechanism and the adjusting device. In some embodiments, the first curved surface and the second curved surface remain slightly larger than the width of the two side surfaces of the packaging bag.

[0010] In some embodiments, the two protrusions include a first protrusion and a second protrusion, and the position between the first protrusion and the second protrusion can be adjusted in the vertical direction and the horizontal direction to adapt to different packaging film materials, wherein:

[0011] The first protrusion and the second protrusion have the same height in the vertical direction and are opposite to each other in the horizontal direction, and the first protrusion is pushed toward the second protrusion by the shaping spring or the second protrusion is pushed toward the first protrusion by the shaping spring, so that a slit is formed between the first protrusion and the second protrusion for the packaging film to pass through; or

[0012] The first protrusion and the second protrusion have different heights in the vertical direction, are opposite to each other in the horizontal direction, and their horizontal projections show that they partially overlap, so that the first edge forms an inclined surface inclined to the vertical direction when passing between the first protrusion and the second protrusion.

[0013] By setting the positions of the first protrusion and the second protrusion to be adjustable, the shaping mechanism has stronger adaptability and can be used for packaging films of different thicknesses and properties. The relative setting is used for packaging films with smaller thicknesses, and the staggered setting is used for packaging films with larger thicknesses. The depth of the staggered first protrusion and the second protrusion can be adjusted according to the thickness and elasticity of the packaging film, thereby ensuring the success rate of opening the packaging bag.

[0014] In some embodiments, the bag support mechanism further includes a bag positioning mechanism, which includes a positioning block and a positioning spring, and is disposed on the side wall of the bag support. The positioning block can penetrate into the second narrow groove under the elastic force of the positioning spring to fix the second side; the positioning block can overcome the elastic force of the positioning spring under the action of external force to exit the second narrow groove and loosen the second side of the packaging bag.

[0015] In some embodiments, the bag positioning mechanism further includes a fixed block, the bag making device further includes a push rod and a driving cam, the positioning block and the fixed block cooperate through an inclined surface, one end of the push rod presses on the driving cam and the other end presses on the fixed block, so as to loosen the first side or the second side of the packaging bag. The cooperation between the inclined surface of the fixed block and the inclined surface of the positioning block can reduce the wear of the push rod on the fixed block and the positioning block, thereby extending the service life of the equipment.

[0016] In some embodiments, the bag holding mechanism further includes a top block, and the top block is located on a side of the bag holding mechanism opposite to the fixing block.

[0017] In some embodiments, the second side heat seal strip and the bottom side heat seal strip are connected to form an L-shaped heat seal strip. The integral heat seal strip can avoid gaps in the heat seal.

[0018] In some embodiments, the bag making device further includes a floating roller mechanism installed between the film supply mechanism and the shaping mechanism, the floating roller mechanism includes two guide grooves and a floating roller, the two ends of the floating roller can move in the two guide grooves, the packaging film passes through the roller surface of the floating roller, and the floating roller floats in the guide groove by elastic force or its own gravity, so that the packaging film maintains a set tension. The floating roller moves in the guide groove by its own gravity and the tension of the packaging film, providing traction balance for the packaging film. In some embodiments, the floating roller is pushed toward the end of the guide groove by a spring, thereby providing the floating roller group with the possibility of installation in other directions.

[0019] In some embodiments, the floating roller mechanism of the bag making device further comprises a position sensor, which is mounted on the floating roller, so as to send an abnormal signal to the control system when the position of the floating roller exceeds the normal working range. In some embodiments, the position sensor is a mechanical switch, a potentiometer, a Hall sensor, a capacitive displacement sensor, a resistive strain displacement sensor, an inductive displacement sensor, an eddy current displacement sensor, a reflective photoelectric displacement sensor, a reflective optical fiber displacement sensor, a grating displacement sensor, a magnetic grating displacement sensor, an inductive synchronizer, or a magnetoresistive displacement sensor.

[0020] In some embodiments, the bag making device further comprises a light sensor located on the moving passage of the packaging film, so as to send an alarm signal to the control system when the packaging film is used up. In some embodiments, the light sensor is a photoresistor, a photocell, or a photoelectric tube. In some embodiments, the light sensor is located at the initial position where the packaging film comes out of the film roll. In some embodiments, the light sensor is configured to detect the thickness of the film roll, and does not need to be located on the forward passage of the packaging film.

[0021] In some embodiments, the bag making device also includes a packaging film folding mechanism, which includes a first guide block, a second guide block, a guide rod and a roller. The second guide block gradually reduces the angle from upstream to downstream from a direction parallel to the first guide block at about 180 degrees, and then gradually increases the angle to be parallel to the first guide block again after reaching the 90-degree position. The guide rod is located between the first guide block and the second guide block, so that the packaging film forms a fold between the first guide block and the second guide block from upstream to downstream. The two opposite rollers are located downstream of the first guide block and the second guide block to extrude the fold to form a sealing edge.

[0022] In some embodiments, the bag making device further comprises a packaging film heat sealing mechanism, wherein the packaging film heat sealing mechanism comprises heat sealing rollers, and a sealing edge can be formed when two layers of packaging film pass between the heat sealing rollers.

[0023] In some embodiments, the bag making device further includes an opening detection mechanism, which includes a camera and a processor, wherein the camera faces the opening end of the packaging bag, and the processor determines whether the packaging bag is in an open state based on a signal from the camera.

[0024] On the other hand, the present application provides a Chinese medicine granule dispensing device, which includes the bag making device described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the three-dimensional structure of an embodiment of the bag making device of the present application;

[0026] Figure 2 A schematic diagram of two protrusions in the shaping mechanism of the bag making device of the present application;

[0027] Figure 3 Another schematic diagram of two protrusions in the shaping mechanism of the bag making device of the present application;

[0028] Figure 4 A three-dimensional diagram of the bag holding mechanism of the bag making device of the present application;

[0029] Figure 5A top view of the bag holding mechanism of the bag making device of the present application;

[0030] Figure 6 Another three-dimensional view of the bag holding mechanism of the bag making device of the present application;

[0031] Figure 7 A bottom view of the bag support mechanism of the bag making device of the present application;

[0032] Figure 8 Another top view of the bag holding mechanism of the bag making device of the present application;

[0033] Fig. 9 A side view of the bag holding mechanism of the bag making device of the present application;

[0034] Fig.10 This is a schematic diagram of the power mechanism of the bag making device of the present application.

[0035] in, Figures 1 to 10 The corresponding relationship between the reference numerals and the component names is as follows:

[0036] 1 support plate, 2 support cylinder, 3 film roll, 4 guide plate, 5 floating roller, 6 horizontal support plate, 7 support shaft, 8 sensor, 9 shaping mechanism, 91 first protrusion, 92 second protrusion, 93 shaping spring, 94 partition plate, 10 driving wheel, 11 film feeding mechanism, 12 frame, 13 sealing and cutting mechanism, 14 rack, 15 pinion, 16 mounting plate, 17 guide shaft, 18 bearing, 19 bag support mechanism, 1901 first narrow slot, 1902 second narrow slot, 1903 first arc surface, 1904 second arc surface, 1905 first inclined surface, 1906 second inclined surface, 1907 ejector slot, 20 fixed plate, 21 frame, 22 driving cam, 23 ejector rod, 24 positioning block, 25 positioning spring, 26 fixed block, 27 ejector block, 28 bag support position sensor. DETAILED DESCRIPTION

[0037] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the specific implementation scheme of the present application is described below in conjunction with the accompanying drawings. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0038] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0039] Some embodiments of the bag making device of the present application are described below in conjunction with the accompanying drawings.

[0040] See also Figure 1The bag making device of the present application comprises a support plate 1 and a support cylinder 2 fixed on the support plate 1, and a film roll 3 is coaxially passed through the support cylinder 2. The film roll 3 is composed of Fig.10 The 1# motor shown in FIG. 1 provides power. The single-side sealed packaging film on the film roll includes a sealed first side and an unsealed second side.

[0041] The packaging film starts from the film roll 3 and passes through the bottom of the floating roller 5 of the floating roller group. The floating roller 5 is vertically assembled and clamped by two guide plates 4 and two transverse support plates 6. The floating roller 5 can float up and down in the guide groove of the guide plate 4. The floating roller 5 moves in the guide groove by its own gravity and the tension of the packaging film, providing traction balance for the packaging film.

[0042] In some embodiments, the floating roller 5 is pushed toward the end of the guide groove by a spring, thereby providing the floating roller group with the possibility of being installed in other directions.

[0043] In some embodiments, the floating roller group includes a position sensor, so that when the floating roller 5 leaves the initial position and the packaging film has been driven downstream, a signal is sent to indicate that the upstream film roll rotates to release the packaging film, thereby providing a time difference between the upstream and downstream forces and relieving the tension of the packaging film. In some embodiments, when the position of the floating roller 5 exceeds the normal working range, the position sensor sends a position abnormality signal to the control system, indicating that there is an abnormality in the traction force in the system. In some embodiments, the position sensor is a mechanical switch, a potentiometer, a Hall sensor, a capacitive displacement sensor, a resistive strain displacement sensor, an inductive displacement sensor, an eddy current displacement sensor, a reflective photoelectric displacement sensor, a reflective optical fiber displacement sensor, a grating displacement sensor, a magnetic grating displacement sensor, an inductive synchronizer, and a magnetoresistive displacement sensor.

[0044] After passing the floating roller 5, the packaging film changes direction from the supporting shaft 7. The packaging film passes through the top of the 1# supporting shaft 7 and runs downward through the middle of the sensor 8, and then passes through the bottom of the 2# and 3# supporting shafts 7. The 1#, 2#, and 3# supporting shafts 7 are only used to change the direction of the packaging film. In the specific setting, they can be increased or decreased according to the location of the mechanism installation, or not used.

[0045] The sensor 8 is located on the packaging film forward passage, so that when the packaging film is used up, a film-free alarm signal is sent to the control system. In some embodiments, the sensor is a light sensor, including a photoresistor, a photocell, or a photoelectric tube. In some embodiments, the sensor 8 is located at the initial position where the packaging film comes out of the film roll, so that a film-free alarm signal is sent as soon as possible. In some embodiments, the sensor 8 is configured to detect the thickness of the film roll 8, and does not need to be located on the packaging film forward passage.

[0046] The packaging film runs backwards to the shaping mechanism 9 above the 3# supporting shaft, and the shaping mechanism 9 and the 3# supporting shaft are located in the same projection plane. The shaping mechanism 9 includes a pair of opposite protrusions and a partition plate 94 located downstream of the protrusions, and the first sealed side of the single-side sealed packaging film passes between the two protrusions, so that the two side surfaces connected to the first side are separated by the protrusions and given a certain deformation. The partition plate 94 is configured so that after the two side surfaces pass through the protrusions, they pass from both sides of the partition plate 94 to maintain the deformation.

[0047] In some embodiments, the protrusion of the shaping mechanism 9 includes a first protrusion 91 and a second protrusion 92, the first protrusion 91 is located between two side surfaces of the packaging film, and the second protrusion 92 is located outside the first side, and the position of the first protrusion 91 or the second protrusion 92 can be adjusted in the vertical direction and the horizontal direction to adapt to different packaging film materials.

[0048] See also Figure 2 , the positions of the first protrusion 91 and the second protrusion 92 can be adjusted as follows: the first protrusion 91 and the second protrusion 92 are in relative positions in the horizontal direction and at the same height in the vertical direction, so that a narrow channel is formed between the first protrusion 91 and the second protrusion 92, so that when the first edge passes through the narrow channel, the surface tension between the two sides of the packaging film changes. In some embodiments, the first protrusion 91 or the second protrusion 92 is a spring sleeve, which includes a shaping spring 93, so that the first protrusion 91 and the second protrusion 92 are pressed against each other.

[0049] See also Figure 3 The positions of the first protrusion 91 and the second protrusion 92 can be adjusted as follows: the first protrusion 91 and the second protrusion 92 are at upstream and downstream positions in the horizontal direction, and the front end of the first protrusion 91 exceeds the front end of the second protrusion 92 in the vertical direction, so that when the packaging film passes through the shaping mechanism, the first edge temporarily forms an inclined surface inclined to the vertical direction between the front ends of the first protrusion 91 and the second protrusion 92.

[0050] By setting the positions of the first protrusion 91 and the second protrusion 92 to be adjustable, the shaping mechanism has stronger adaptability and can be used for packaging films of different thicknesses and properties. The relative setting is used for packaging films with smaller thicknesses, and the staggered setting is used for packaging films with larger thicknesses. The depth of the staggered first protrusion 91 and the second protrusion 92 can be adjusted according to the thickness and elasticity of the packaging film, thereby ensuring the success rate of opening the packaging bag.

[0051] The film feeding mechanism 11 and the partition plate 94 of the shaping mechanism 9 are located at the same horizontal plane, and the four driving wheels 10 of the film feeding mechanism 11 are arranged on both sides of the packaging film. Fig.10 Under the action of the 2# motor shown in the figure, the packaging film moves upward in a straight line into the sealing and cutting mechanism 13. By setting the position of the driving wheel 10 in parallel with the shaping mechanism 9, the need for other driving mechanisms can be reduced, the mechanism in the entire device can be saved, and the failure rate can be reduced.

[0052] The frame 12 of the sealing and cutting mechanism 13 can be parallel to the packaging film in both horizontal and vertical directions. The sealing and cutting mechanism 13 includes a small gear 15 fixed on the mounting plate 16. The small gear 15 is Fig.10 The 3# motor provides power and can rotate. The rack 14 meshes with the pinion 15, so that when the pinion 15 rotates, the rack 14 moves forward or backward in a straight line. The rack 14 is fixedly connected to the four guide shafts 17 through the top plate, and the guide shafts 17 are vertically connected to the sealing and cutting rear end of the sealing and cutting mechanism 13 through the bearings 18. The front section of the sealing and cutting mechanism 13 includes a heat sealing strip and a cutter. The heat sealing strip corresponds to the second side and bottom side of the packaging bag, and the cutter corresponds to the top side of the packaging bag. The heat sealing strip seals the side and bottom sides of the packaging film, thereby making the packaging film into a packaging bag with sealed edges on both sides and the bottom. After the packaging bag enters the bag support mechanism 19, the cutter cuts the packaging bag off the packaging film.

[0053] In some embodiments, the heat sealing strips corresponding to the second side opposite to the first side and the bottom edge of the packaging bag are connected to form an L-shaped heat sealing strip, and the overall heat sealing strip can avoid gaps in the heat seal.

[0054] The packaging bag is fed into the bag support mechanism 19 by the film feeding mechanism 11 with traction power, and the bag support mechanism 19 is located above the sealing and cutting mechanism 13. After the packaging bag enters the bag support mechanism 19, the cutter of the sealing and cutting mechanism 13 cuts the packaging bag off from the packaging film.

[0055] Figure 4-Figure 7 The structure of the bag support mechanism 19 is described in detail. Figure 4 It is a three-dimensional image from above. Figure 5 is a top view, Figure 6 This is a stereogram from an oblique downward perspective. Figure 7 The bag holding mechanism 19 includes a first slot 1901 for receiving the first edge and a second slot 1902 for receiving the second edge. The relative distance between the first slot 1901 and the second slot 1902 gradually shortens from upstream to downstream, thereby squeezing the first edge and the second edge of the packaging bag, so that the side surface of the packaging bag is subjected to pressure from the first edge and the second edge, and opens according to the deformation generated by the shaping mechanism 9 to form an opening.

[0056] The bag support mechanism 19 also includes a side wall that matches the side of the packaging bag, and the side wall includes a first curved surface 1903 and a second curved surface 1904, and has an arc away from the packaging bag in the direction between the first narrow groove 1901 and the second narrow groove 1904, and the curvature of the arc gradually increases from upstream to downstream as the relative distance between the first narrow groove 1901 and the second narrow groove 1902 becomes shorter, and the length of the arc is kept slightly larger than the width of the side of the packaging bag. The side wall can provide a fixed position for the packaging bag, so that the packaging bag can maintain the shape of the packaging bag in the subsequent filling process to avoid leakage.

[0057] In addition, the widths of the first narrow groove 1901 and the second narrow groove 1902 gradually narrow from upstream to downstream, forming a first inclined surface 1905 and a second inclined surface 1906 respectively, so as to receive the packaging bag after being sealed and cut by the sealing and cutting mechanism 13, and comb the first edge and the second edge to a fixed relative position.

[0058] In some embodiments, the bag holding mechanism 19 includes an ejection groove 1907, so that it can cooperate with other mechanisms of the Chinese medicine granule dispensing device to eject the packaging bag out of the bag holding mechanism 19 after filling is completed.

[0059] Through the cooperation of the shaping mechanism 9 and the bag supporting mechanism 19, the fixing mechanism and the bag supporting mechanism of the packaging bag can be omitted, so as to avoid the contact between the above mechanisms and the inside of the packaging bag, thereby reducing the possibility of contamination. The mechanism is simple and the possibility of mechanical failure is reduced.

[0060] See also Figure 4 , Figure 8 and Fig. 9 The bag making device further includes a bag positioning mechanism. The depth of the second slot 1902 of the bag holding mechanism 19 is greater than the depth of the first slot 1901 opposite thereto. The bag positioning mechanism includes a positioning block 24 and a positioning spring 25 located on the side wall of the second slot 1902. The positioning block 24 can penetrate into the second slot 1902 under the action of the positioning spring 25 to fix the packaging bag.

[0061] The positioning block 24 of the bag holding mechanism 19 has an inclined surface, which is opposite to the fixing block 26. The bag making device also includes a push rod 23. The positioning block 24 and the fixing block 26 cooperate with the push rod 23. When the push rod 23 enters the space between the positioning block 24 and the fixing block 26, the positioning block 24 moves away from the fixing block 26 and withdraws from the second narrow slot 1902, thereby releasing the packaging bag. When the push rod 23 withdraws from the space, the positioning spring 25 drives the positioning block 24 to move toward the fixing block 26 and enter the second narrow slot 1902 to fix the packaging bag. The push rod 23 can simultaneously play the role of fixing the packaging bag and positioning the bag holding mechanism 19.

[0062] In some embodiments, the push rod 23 is connected to the driving cam 22, and the driving cam 22 is Fig.10 The 4# motor shown in the figure drives the machine frame 21 to move in the frame, thereby driving the push rod 23 to move forward and backward. The frame 21, the driving cam 22, and the push rod 23 are installed in the frame 21. Figure 1 On the fixing plate 20.

[0063] In some embodiments, the fixing block 26 has an inclined surface, and the inclined surface of the fixing block 26 is opposite to the inclined surface of the positioning block 24, so as to guide the ejector rod 23 into the space. The cooperation between the inclined surface of the fixing block 26 and the inclined surface of the positioning block 24 can reduce the wear of the ejector rod 23 on the fixing block 26 and the positioning block 24, and extend the service life of the device.

[0064] In some embodiments, see Figure 4 The bag holding mechanism 19 has a top block 27 on the side opposite to the fixing block 26, so that the top block 27 cooperates with the top rod 23 to clamp the bag holding mechanism 19 and fix the bag holding mechanism 19. The bag holding mechanism 19 can be firmly fixed by the cooperation of the top block 27 and the bag making device, and the cooperation of the fixing block 26 and the top rod 23. Through this arrangement, the fixing block 26 used to fix the bag holding mechanism 19 cooperates with the positioning block 24 and the top rod 23, which can not only cooperate to fix the packaging bag, but also fix the bag holding mechanism 19, reducing the complexity of the system.

[0065] In some embodiments, the bag holding mechanism 19 includes a bag holding position sensor 28 , and the bag holding position sensor 28 is used to cooperate with the bag making device to detect the position of the bag holding mechanism 19 .

[0066] In some embodiments, the bag making device also includes an opening detection mechanism, which includes a camera and a central processing unit. The camera shoots toward the top edge of the packaging bag, and the central processing unit determines whether the packaging bag is open according to an algorithm based on the photos taken by the camera, and marks the packaging bag with the serial number as unopened after determining that it is not opened.

[0067] The bag making device described above uses a double-layer film pre-folded by the manufacturer, but it can also use a single-layer film. In the bag making device using a single-layer film, it also includes a film folding mechanism or a film heat-sealing mechanism to fold the single-layer film into a double-layer film or heat-seal the two-layer film on one side before entering the shaping mechanism.

[0068] The film folding mechanism includes a first guide block and a second guide block, the second guide block gradually reduces the angle from the direction parallel to the first guide block at about 180 degrees from upstream to downstream, and continues to reduce the angle to be parallel to the first guide block again after exceeding the vertical position, and a guide rod is provided between the first guide block and the second guide block, so that the packaging film forms a folded film between the first guide block and the second guide block from upstream to downstream, and the downstream of the film folding mechanism includes opposite rollers to squeeze the folded edge to form a crease. The film folding mechanism can fold a single-layer film into a folded film, thereby cooperating with other mechanisms of the present application.

[0069] The film heat-sealing mechanism includes heat-sealing rollers, so that when two layers of packaging film pass between the heat-sealing rollers, a sealed edge is formed. The film heat-sealing mechanism can heat-seal the two layers of film into a folded film, thereby cooperating with other mechanisms of the present application.

[0070] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be internal communication between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0071] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", "some implementations", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or implementation of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or implementation. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or implementations in a suitable manner.

[0072] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A bag making device, characterized in that: Along the moving direction of the packaging film, it includes: a film roll, a shaping mechanism, a film feeding mechanism, a sealing and cutting mechanism and a bag supporting mechanism, wherein: The shaping mechanism comprises two opposite protrusions and a partition plate, wherein the partition plate is arranged downstream of the two protrusions in the moving direction of the packaging film, so that the sealed first edge of the packaging film passes between the two protrusions to destroy the surface tension direction between the packaging films, and then the packaging film passes from both sides of the partition plate, so that the packaging bag enters the bag holding mechanism and opens; The film feeding mechanism comprises a driving wheel, which is arranged downstream of the two protrusions in the moving direction of the packaging film and is located beside the partition plate; The sealing and cutting mechanism comprises a second edge heat sealing strip corresponding to the second edge of the packaging bag, a bottom edge heat sealing strip corresponding to the bottom edge of the packaging bag, and a cutter corresponding to the top edge of the packaging bag; The bag support mechanism comprises a receiving cavity, the receiving cavity comprises a first slot for receiving the first side, a second slot for receiving the second side, and a first arc surface and a second arc surface for supporting two side surfaces of the packaging bag, the distance between the first slot and the second slot gradually shortens from upstream to downstream, the curvatures of the first arc surface and the second arc surface gradually increase from upstream to downstream, and the distance between the first arc surface and the second arc surface gradually shortens from upstream to downstream; The bag holding mechanism further includes a bag positioning mechanism, which is disposed on the side wall of the bag holding mechanism and is used for penetrating into the second slot to fix the second edge, or exiting the second slot to release the second edge.

2. The bag making device according to claim 1, characterized in that: The widths of the first narrow slot and the second narrow slot gradually narrow from upstream to downstream, and remain constant after being narrowed to a value slightly larger than the thickness of the packaging film.

3. The bag making device according to claim 1, characterized in that: The two protrusions include a first protrusion and a second protrusion, and the relative positions of the first protrusion and the second protrusion can be adjusted in the vertical direction and the horizontal direction to adapt to different packaging film materials, wherein: The first protrusion and the second protrusion have the same height in the vertical direction and are opposite to each other in the horizontal direction, and the first protrusion is pushed toward the second protrusion by the shaping spring or the second protrusion is pushed toward the first protrusion by the shaping spring, so that a slit is formed between the first protrusion and the second protrusion for the packaging film to pass through; or The first protrusion and the second protrusion have different heights in the vertical direction, are opposite to each other in the horizontal direction, and their horizontal projections show that they partially overlap, so that the packaging film forms an inclined surface inclined to the vertical direction when passing between the first protrusion and the second protrusion.

4. The bag making device according to claim 1, characterized in that: The bag positioning mechanism includes a positioning block and a positioning spring, which are arranged on the side wall of the bag holder. The positioning block can penetrate into the second slot under the elastic force of the positioning spring to fix the second side; the positioning block can overcome the elastic force of the positioning spring under the action of external force to exit the second slot and release the second side.

5. The bag making device according to claim 4, characterized in that: The bag positioning mechanism also includes a fixing block, and the bag making device also includes a push rod and a driving cam. The positioning block cooperates with the fixing block through an inclined surface, and one end of the push rod presses on the driving cam and the other end presses on the fixing block.

6. The bag making device according to claim 1, characterized in that: The second edge heat sealing strip and the bottom edge heat sealing strip are connected to form an L-shaped heat sealing strip.

7. The bag making device according to any one of claims 1 to 6, characterized in that: It also includes a floating roller mechanism, which is installed between the film supply mechanism and the shaping mechanism. The floating roller mechanism includes two guide grooves and a floating roller. Both ends of the floating roller can move in the two guide grooves. The packaging film passes through the roller surface of the floating roller. The floating roller floats in the guide groove by elastic force or its own gravity, so that the packaging film maintains a set tension.

8. The bag making device according to claim 7, characterized in that: The floating roller mechanism further comprises a position sensor mounted on the floating roller so as to send an abnormal signal to a control system when the position of the floating roller exceeds a normal working range.

9. The bag making device according to claim 7, characterized in that: It also includes an opening detection mechanism, which includes a camera and a processor. The camera faces the opening end of the packaging bag, and the processor determines whether the packaging bag is in an open state based on the signal from the camera.

10. A Chinese medicine granule dispensing device, characterized in that: The bag making device comprises the bag making device according to any one of claims 1 to 9.

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