Double-inlet and double-outlet annular pipe sealing machine

Abstract

The utility model discloses a double-inlet and double-outlet annular pipe sealing machine which comprises a machine frame, an annular guide rail, a first driving mechanism, a plurality of sliding blocks, two sets of suction nozzle pushing-in mechanisms, two sets of heat sealing mechanisms and two sets of suction nozzle pushing-out mechanisms, and the suction nozzle pushing-in mechanisms, the heat sealing mechanisms and the suction nozzle pushing-out mechanisms are sequentially arranged from front to back. Each sliding block is connected with the power output end of the first driving mechanism, each sliding block can move in the circumferential direction of the annular guide rail, and each sliding block is provided with at least one suction nozzle positioning groove; the annular guide rail comprises two linear guide rail sections, and the suction nozzle push-in mechanism, the heat sealing mechanism and the suction nozzle push-out mechanism are sequentially arranged on the corresponding linear guide rail sections from front to back; each heat sealing mechanism comprises at least one primary sealing unit, at least one secondary sealing unit, at least one tertiary sealing unit, at least one cold sealing unit and at least one quartic sealing unit. The self-supporting bag heat sealing device is simple and compact in structure and energy-saving, and improves heat sealing efficiency of self-supporting bags.

Description

Technical Field

[0001] The utility model relates to a tube sealing machine for a stand-up bag with a suction nozzle, in particular to a double-inlet and double-outlet annular tube sealing machine. Background Art

[0002] A stand-up bag with a nozzle refers to a flexible packaging bag with a nozzle on the top or side of the stand-up bag, which is convenient for users to pour or suck the contents of the stand-up bag. At the same time, the stand-up bag can be reclosed and repeatedly opened. It can be considered as a combination of a stand-up bag and an ordinary bottle mouth.

[0003] The existing stand-up bag production equipment with a nozzle generally includes the following steps during operation: the nozzle is fed into a circulating conveyor driven by a chain or belt, the bag body of the stand-up bag is placed on the nozzle, the bag body and the nozzle are then heated and sealed together, and the product is collected after testing. When the bag body is placed on the nozzle, the bag mouth of the bag body is simply connected to the nozzle to obtain a semi-finished stand-up bag. The bag mouth of the bag body needs to be heat-sealed on the nozzle to achieve a seal between the bag mouth of the bag body and the nozzle.

[0004] At present, a tube sealing machine is used to heat seal the mouth of a semi-finished stand-up bag on the nozzle. However, although this tube sealing machine can achieve the sealing between the mouth of the semi-finished stand-up bag and the nozzle, the processes of feeding the semi-finished stand-up bag nozzle, nozzle positioning, heat sealing of the mouth, and output of the stand-up bag are all completed at one station, and the heat sealing efficiency is not high, resulting in a waste of time. If the heat sealing efficiency of this tube sealing machine is to be improved, it is necessary to use multiple tube sealing machines for heat sealing at the same time, and using multiple tube sealing machines at the same time will waste production capacity, increase production costs, and occupy a large space. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a double-inlet and double-outlet annular tube sealing machine, which has a simple and compact structure, is energy-saving, and improves the heat sealing efficiency of the stand-up bag. The technical solution adopted is as follows:

[0006] A double-input and double-output annular tube sealing machine, characterized in that it comprises a frame, an annular guide rail, a first driving mechanism and a plurality of slide blocks, and two groups of nozzle pushing mechanisms, heat sealing mechanisms and nozzle pushing mechanisms arranged in sequence from front to back, the annular guide rail and the first driving mechanism are both mounted on the frame; each slide block is arranged on the annular guide rail along the circumference of the annular guide rail, each slide block is connected to the power output end of the first driving mechanism, and each slide block can move along the circumference of the annular guide rail, and each slide block is provided with at least one nozzle positioning groove; the annular guide rail comprises two linear guide rail sections, the nozzle pushing mechanism, the heat sealing mechanism and the nozzle pushing mechanism are arranged in sequence from front to back on the corresponding linear guide rail sections, the power output end of the nozzle pushing mechanism faces the nozzle positioning groove on the corresponding slide block, and the power output end of the nozzle pushing mechanism faces the nozzle positioning groove on the corresponding slide block; each Each heat-sealing mechanism includes at least one primary sealing unit, at least one secondary sealing unit, at least one tertiary sealing unit, at least one cold sealing unit and at least one quaternary sealing unit. Each linear guide rail segment is provided with a primary sealing station, a secondary sealing station, a tertiary sealing station, a cold sealing station and a quaternary sealing station corresponding to each slider from front to back. The primary sealing unit corresponds to the nozzle positioning groove on the primary sealing station, the secondary sealing unit corresponds to the nozzle positioning groove on the secondary sealing station, the tertiary sealing unit corresponds to the nozzle positioning groove on the tertiary sealing station, the cold sealing unit corresponds to the nozzle positioning groove on the cold sealing station, and the quaternary sealing unit corresponds to the nozzle positioning groove on the quaternary sealing station; the heating temperatures of the primary sealing unit, the secondary sealing unit, the tertiary sealing unit and the quaternary sealing unit are all greater than the heating temperature of the cold sealing unit.

[0007] The above definitions of front and back refer to: along the conveying direction of the circular guide rail, the one that arrives first is the front and the one that arrives slowly is the back. The above definitions of front and back are for the convenience of expression, and in fact, any other direction can be changed.

[0008] Usually, at least one nozzle positioning groove is provided on the slider, and the nozzle positioning groove is used to insert the nozzle of the stand-up pouch semi-finished product and position the nozzle so that the stand-up pouch semi-finished product can be heat-sealed and shaped in an inverted state.

[0009] During operation, driven by the first driving mechanism, each slider moves along the circumference of the annular guide rail, so that the two groups of nozzle pushing mechanisms, heat sealing mechanisms, and nozzle pushing mechanisms work simultaneously; the semi-finished stand-up bags are transported to the nozzle pushing mechanism one by one through the external conveying mechanism, and the nozzle of the semi-finished stand-up bag is pushed into the nozzle positioning groove on the corresponding slider through the nozzle pushing mechanism, and the nozzle is positioned through the nozzle positioning groove; then, driven by the first driving mechanism, the semi-finished stand-up bag at the nozzle pushing mechanism is moved to the heat sealing mechanism, and the semi-finished stand-up bag at the nozzle pushing mechanism is sealed through the primary sealing unit, the secondary sealing unit, the tertiary sealing unit, the cold sealing unit, the quaternary sealing unit, and the cold sealing unit. The unit seals the bag mouth and the suction nozzle of the semi-finished stand-up bag five times from front to back one by one, and gradually heat-seals and fixes the bag mouth and the suction nozzle by the first sealing unit, the second sealing unit and the third sealing unit to prevent the bag mouth and the suction nozzle from being easily separated after the first sealing, and then cools the bag mouth and the suction nozzle by the cold sealing unit, and then heat-seals and shapes the bag mouth and the suction nozzle by the fourth sealing unit to make the self-supporting bag finished product; finally, under the drive of the first driving mechanism, the self-supporting bag finished product at the fourth sealing unit is moved to the suction nozzle pushing mechanism, and the suction nozzle pushing mechanism pushes the suction nozzle of the self-supporting bag finished product out of the suction nozzle positioning groove, so as to facilitate the collection of the self-supporting bag finished product.

[0010] In a preferred embodiment, the primary sealing unit, the secondary sealing unit, the tertiary sealing unit and the quaternary sealing unit all include a heat sealing cylinder, a heat sealing fixing block, two heat sealing blocks and two heat sealing strips. The heat sealing cylinder and the heat sealing fixing block are both installed on the frame. The piston rod of the heat sealing cylinder extends toward the heat sealing fixing block. One heat sealing block is installed on the end of the piston rod of the heat sealing cylinder, and the other heat sealing block is installed on the heat sealing fixing block. Two heat sealing strips are installed on the inner side surfaces of the corresponding heat sealing blocks. The nozzle positioning groove on the corresponding slider is between the two heat sealing strips. The heat sealing strip on one side of the heat sealing fixing block contacts and cooperates with the bag mouth of the semi-finished stand-up bag on the nozzle positioning groove. Driven by the first driving mechanism, the semi-finished stand-up bag at the nozzle pushing mechanism is moved to the heat sealing mechanism, the mouth of the semi-finished stand-up bag is between the two heat sealing strips, and a heat sealing block is driven by the heat sealing cylinder to clamp the other heat sealing block, so that the two heat sealing strips clamp the mouth of the semi-finished stand-up bag, and heat seal is performed between the mouth of the semi-finished stand-up bag and the nozzle.

[0011] In another preferred embodiment, the primary sealing unit, the secondary sealing unit, the tertiary sealing unit, and the quaternary sealing unit all include two heat-sealing cylinders, two heat-sealing blocks, and two heat-sealing strips. The two heat-sealing cylinders are mounted on the frame, and the extension directions of the piston rods of the two heat-sealing cylinders are arranged oppositely. The two heat-sealing blocks are respectively mounted on the ends of the piston rods of the corresponding heat-sealing cylinders, and the two heat-sealing strips are mounted on the inner side surfaces of the corresponding heat-sealing blocks. The nozzle positioning groove on the corresponding slider is between the two heat-sealing strips. Under the drive of the first driving mechanism, the semi-finished stand-up bag at the nozzle push-in mechanism is moved to the heat-sealing mechanism, and the mouth of the semi-finished stand-up bag is between the two heat-sealing strips. The two heat-sealing blocks are driven by the two heat-sealing cylinders to clamp toward each other, so that the two heat-sealing strips clamp the mouth of the semi-finished stand-up bag, and heat-seal the mouth of the semi-finished stand-up bag with the nozzle. The double heat-sealing cylinder structure can independently control the two heat-sealing blocks to achieve a more precise heat-sealing effect.

[0012] In a further preferred embodiment, the heat sealing strip is an L-shaped strip block, the vertical side of the L-shaped strip block is installed on the inner side of the heat sealing block, and the inner side of the horizontal side of the L-shaped strip block constitutes the heat sealing surface of the heat sealing strip.

[0013] In the preferred embodiment, the cold sealing unit includes a cold sealing cylinder, a cold sealing fixing block, two cold sealing pressure blocks and two cold sealing strips. The cold sealing cylinder and the cold sealing fixing block are both installed on the frame, the piston rod of the cold sealing cylinder extends toward the cold sealing fixing block, one cold sealing pressure block is installed on the end of the piston rod of the cold sealing cylinder, and the other cold sealing pressure block is installed on the cold sealing fixing block, and cooling channels for cold water flow are provided in the two cold sealing pressure blocks; the two cold sealing strips are installed on the inner side surfaces of the corresponding cold sealing pressure blocks, the suction nozzle positioning groove on the corresponding slider is between the two cold sealing strips, and the cold sealing strip on one side of the cold sealing fixing block contacts and cooperates with the bag mouth of the semi-finished stand-up bag on the suction nozzle positioning groove. Driven by the first driving mechanism, the semi-finished stand-up bag at the nozzle pushing mechanism is moved to the cold sealing unit, the bag mouth of the semi-finished stand-up bag is between the two cold sealing strips, and a cold sealing block is driven by the cold sealing cylinder to clamp to the other cold sealing block, so that the two cold sealing strips clamp the bag mouth of the semi-finished stand-up bag, and cool the bag mouth of the semi-finished stand-up bag and the nozzle.

[0014] In a further preferred embodiment, the inner side surfaces of the two cold seal strips are provided with a mesh pattern. According to the needs of different customers, some customers require a mesh pattern to be generated on the edge of the bag mouth (different customers have different mesh patterns), and then a mesh pattern is provided on the inner side surface of the cold seal strip of the cold seal unit, so that a mesh pattern is generated on the edge of the bag mouth.

[0015] In a preferred embodiment, the first driving mechanism includes an annular chain, a conveying motor, a driving sprocket and at least one driven sprocket. The conveying motor is mounted on a frame. Both the driving sprocket and the driven sprocket can be rotatably mounted on the frame. The annular chain is tensioned outside the driving sprocket and the driven sprocket. The annular guide rail is located outside the annular chain. Each of the sliders is connected to the annular chain. The driving sprocket is connected to the output shaft of the conveying motor by transmission. The conveying motor is used to drive the driving sprocket to rotate, so as to realize the conveying of the annular chain. Driven by the annular chain, each slider can move along the circumference of the annular guide rail. The number of the driven sprocket rollers can be adjusted according to actual needs and the length of the annular chain. Each driven sprocket and the driving sprocket can tension the annular chain together along the required route.

[0016] In the preferred embodiment, the nozzle pushing mechanism includes a pushing cylinder, a first pushing block and a first guide strip groove, the pushing cylinder is mounted on the frame, the piston rod of the pushing cylinder faces the nozzle positioning groove on the corresponding slider, the first pushing block is mounted on the end of the piston rod of the pushing cylinder, the first guide strip groove is horizontally mounted on the frame, an opening of the first guide strip groove corresponds to the first pushing block, and there is a first gap between the opening of the first guide strip groove and the first pushing block for the nozzle positioning groove to pass through, and the other opening of the first guide strip groove corresponds to the nozzle positioning groove on the corresponding slider. When the external conveying mechanism conveys the semi-finished self-supporting bag to an opening of the first guide strip groove one by one, the first pushing block is driven by the pushing cylinder to accurately push the nozzle of the semi-finished self-supporting bag into the nozzle positioning groove along the guidance of the first guide strip groove, ensuring that the nozzle can be accurately inserted into the corresponding nozzle positioning groove.

[0017] In the preferred embodiment, the nozzle ejection mechanism includes an ejection cylinder, a second push block and a second guide strip groove, the ejection cylinder is mounted on the frame, the piston rod of the ejection cylinder faces the nozzle positioning groove on the corresponding slider, the second push block is mounted on the end of the piston rod of the ejection cylinder, the second guide strip groove is horizontally mounted on the frame, an opening of the second guide strip groove corresponds to the corresponding nozzle positioning groove and the second push block in sequence, and a second gap is provided between the opening of the second guide strip groove and the second push block for the nozzle positioning groove to pass through. When the self-supporting bag products are transported one by one to an opening of the second guide strip groove, the ejection cylinder drives the second push block to accurately eject the nozzle of the self-supporting bag product along the guidance of the second guide strip groove.

[0018] In the preferred embodiment, two waste recovery mechanisms are also included, and the suction nozzle pushing mechanism, heat sealing mechanism, suction nozzle pushing mechanism, and waste recovery mechanism are arranged on the corresponding linear guide rail segments in sequence from front to back; the waste recovery mechanism includes a waste pushing cylinder, a third pushing block and a recovery box, the waste pushing cylinder is installed on the frame, the piston rod of the waste pushing cylinder faces the suction nozzle positioning groove on the corresponding slider, the third pushing block is installed on the end of the piston rod of the waste pushing cylinder, and the recovery box is arranged on the other side opposite to the third pushing block and on one side of the corresponding suction nozzle positioning groove.

[0019] Compared with the prior art, the utility model has the following advantages:

[0020] The utility model utilizes the mutual cooperation between the annular guide rail, each slide block and a first driving mechanism to drive the two sets of heat sealing mechanisms to work in conjunction, has a simple and compact structure, can use two workstations at the same time to carry out the processes of feeding the suction nozzle of the semi-finished stand-up bag, positioning the suction nozzle, heat sealing the bag nozzle, and outputting the finished stand-up bag, thus saving energy and improving the heat sealing efficiency of the stand-up bag. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a specific embodiment 1 of the utility model;

[0022] Figure 2 It is a cross-sectional view of the heat sealing mechanism in the specific embodiment 1 of the utility model;

[0023] Figure 3 yes Figure 1 Structural schematic diagram of the middle suction nozzle pushing mechanism;

[0024] Figure 4 yes Figure 1 The structural diagram of the heat sealing mechanism;

[0025] Figure 5 yes Figure 1 Schematic diagram of the structure of the middle suction nozzle ejection mechanism. DETAILED DESCRIPTION

[0026] The following is a further description of the preferred embodiments of the present invention in conjunction with the accompanying drawings.

[0027] Embodiment 1, as Figure 1-5As shown, the double-input and double-output annular tube sealing machine in this embodiment includes a frame 1, an annular guide rail 2, a first driving mechanism 3 and a plurality of sliders 4, as well as two groups of nozzle pushing mechanisms 5, heat sealing mechanisms 6 and nozzle pushing mechanisms 7 arranged in sequence from front to back, the annular guide rail 2 and the first driving mechanism 3 are both mounted on the frame 1; each slider is arranged on the annular guide rail 2 along the circumference of the annular guide rail 2, each slider 4 is connected to the power output end of the first driving mechanism 3, and each slider 4 can move along the circumference of the annular guide rail 2, and each slider 4 is provided with two nozzle positioning grooves 41; the annular guide rail 2 includes two linear guide rail sections 21, the nozzle pushing mechanism 5, the heat sealing mechanism 6, and the nozzle pushing mechanism 7 are arranged in sequence from front to back on the corresponding linear guide rail sections 21, the power output end of the nozzle pushing mechanism 5 faces the nozzle positioning groove 41 on the corresponding slider 4, and the power output end of the nozzle pushing mechanism 7 faces the nozzle positioning groove 41 on the corresponding slider 4; each heat sealing mechanism 6 includes two one-time sealing The first sealing unit 61, two secondary sealing units 62, two tertiary sealing units 63, two cold sealing units 64 and two quaternary sealing units 65 are provided on each linear guide rail section 21 from front to back in sequence with a primary sealing station 211, a secondary sealing station 212, a tertiary sealing station 213, a cold sealing station 214 and a quaternary sealing station 215 corresponding to each slider 4. The first sealing unit 61 corresponds to the nozzle positioning groove 41 on the first sealing station 211, and the secondary sealing unit 62 corresponds to the nozzle positioning groove 41 on the secondary sealing station 212. The suction nozzle positioning groove 41 on the sealing station 212 corresponds, the tertiary sealing unit 63 corresponds to the suction nozzle positioning groove 41 on the tertiary sealing station 213, the cold sealing unit 64 corresponds to the suction nozzle positioning groove 41 on the cold sealing station 214, and the fourth sealing unit 65 corresponds to the suction nozzle positioning groove 41 on the fourth sealing station 215; the heating temperatures of the first sealing unit 61, the second sealing unit 62, the third sealing unit 63, and the fourth sealing unit 65 are all greater than the heating temperature of the cold sealing unit 64.

[0028] The above definitions of front and rear refer to: along the conveying direction of the circular guide rail 2, the first to arrive is the front, and the slowest to arrive is the rear. The above definitions of front and rear are for the convenience of expression, and in fact, any other direction can be changed.

[0029] Usually, at least one nozzle positioning groove 41 is provided on the slider 4. The nozzle positioning groove 41 is used to insert the nozzle of the stand-up pouch semi-finished product 8 and position the nozzle so that the stand-up pouch semi-finished product 8 can be heat-sealed and shaped in an inverted state.

[0030] During operation, driven by the first driving mechanism 3, each slider 4 moves along the circumferential direction of the annular guide rail 2, so that the two groups of nozzle pushing mechanisms 5, heat sealing mechanisms 6, and nozzle pushing mechanisms 7 work simultaneously; the stand-up bag semi-finished products 8 are transported to the nozzle pushing mechanisms 5 one by one through the external conveying mechanism, and the nozzles of the stand-up bag semi-finished products 8 are pushed into the nozzle positioning grooves 41 on the corresponding sliders 4 through the nozzle pushing mechanisms 5, and the nozzles are positioned through the nozzle positioning grooves 41; then, driven by the first driving mechanism 3, the stand-up bag semi-finished products 8 at the nozzle pushing mechanisms 5 are moved to the heat sealing mechanisms 6, and are sealed through the primary sealing units 61, the secondary sealing units 62, the tertiary sealing units 63, the cold sealing units 64, the fourth sealing units 65, and the cold sealing units 66. The secondary sealing unit 65 seals the bag mouth and the suction nozzle of the semi-finished self-supporting bag 8 five times from front to back one by one, and the primary sealing unit 61, the secondary sealing unit 62, and the tertiary sealing unit 63 gradually heat-seal and fix the bag mouth and the suction nozzle to prevent the primary sealed bag mouth and the suction nozzle from being easily separated, and then the cold sealing unit 64 is used to cool the bag mouth and the suction nozzle, and then the quaternary sealing unit 65 is used to heat-seal and shape the bag mouth and the suction nozzle to form a self-supporting bag product; finally, under the drive of the first driving mechanism 3, the self-supporting bag product at the quaternary sealing unit 65 is moved to the suction nozzle pushing mechanism 7, and the suction nozzle pushing mechanism 7 pushes the suction nozzle of the self-supporting bag product out of the suction nozzle positioning groove 41, so as to facilitate the collection of the self-supporting bag product.

[0031] The primary sealing unit 61, the secondary sealing unit 62, the tertiary sealing unit 63 and the quaternary sealing unit 65 all include a heat sealing cylinder 611, a heat sealing fixing block 612, two heat sealing blocks 613 and two heat sealing strips 614. The heat sealing cylinder 611 and the heat sealing fixing block 612 are both installed on the frame 1. The piston rod of the heat sealing cylinder 611 extends toward the heat sealing fixing block 612. One heat sealing block 613 is installed on the end of the piston rod of the heat sealing cylinder 611, and the other heat sealing block 613 is installed on the heat sealing fixing block 612. Two heat sealing strips 614 are installed on the inner side surfaces of the corresponding heat sealing blocks 613. The nozzle positioning groove 41 on the corresponding slider 4 is between the two heat sealing strips 614. The heat sealing strip 614 on one side of the heat sealing fixing block 612 contacts and cooperates with the bag mouth of the self-supporting bag semi-finished product 8 on the nozzle positioning groove 41. Driven by the first driving mechanism 3, the semi-finished self-supporting bag 8 at the nozzle pushing mechanism 5 is moved to the heat sealing mechanism 6, and the mouth of the semi-finished self-supporting bag 8 is between the two heat sealing strips 614. The heat sealing cylinder 611 drives one heat sealing block 613 to clamp to the other heat sealing block 613, so that the two heat sealing strips 614 clamp the mouth of the semi-finished self-supporting bag 8, and heat seal is performed between the mouth of the semi-finished self-supporting bag 8 and the nozzle.

[0032] The heat sealing strip 614 is an L-shaped strip block, the vertical side 6141 of the L-shaped strip block is installed on the inner side of the heat sealing pressing block 613, and the inner side of the horizontal side 6142 of the L-shaped strip block constitutes the heat sealing surface of the heat sealing strip 614.

[0033] The cold sealing unit 64 includes a cold sealing cylinder 641, a cold sealing fixing block 642, two cold sealing pressure blocks 643 and two cold sealing strips 644. The cold sealing cylinder 641 and the cold sealing fixing block 642 are both installed on the frame 1. The piston rod of the cold sealing cylinder 641 extends toward the cold sealing fixing block 642. One cold sealing pressure block 643 is installed on the end of the piston rod of the cold sealing cylinder 641, and the other cold sealing pressure block 643 is installed on the cold sealing fixing block 642. A cooling channel for cold water flow is provided in the two cold sealing pressure blocks 643; the two cold sealing strips 644 are installed on the inner side surfaces of the corresponding cold sealing pressure blocks 643, the suction nozzle positioning groove 41 on the corresponding slider 4 is between the two cold sealing strips 644, and the cold sealing strip 644 on one side of the cold sealing fixing block 642 contacts and cooperates with the bag mouth of the semi-finished stand-up bag on the suction nozzle positioning groove 41. Driven by the first driving mechanism 3, the semi-finished stand-up bag at the tertiary sealing unit 63 is moved to the cold sealing unit 64, and the mouth of the semi-finished stand-up bag is between two cold sealing strips 644. A cold sealing block 643 is driven by the cold sealing cylinder 641 to clamp to another cold sealing block 643, so that the two cold sealing strips 644 clamp the mouth of the semi-finished stand-up bag, and cool the mouth of the semi-finished stand-up bag and the nozzle.

[0034] The inner side surfaces of the two cold seal strips 644 are both provided with mesh patterns. According to the needs of different customers, some customers require mesh patterns to be generated on the edge of the bag mouth (different customers have different mesh patterns), and then mesh patterns are set on the inner side surfaces of the cold seal strips 644 of the cold seal unit 64, so that mesh patterns are generated on the edge of the bag mouth.

[0035] The first driving mechanism 3 includes an annular chain 31, a conveying motor (not shown in the figure), a driving sprocket 32 ​​and at least one driven sprocket 33. The conveying motor is mounted on the frame 1. The driving sprocket 32 ​​and the driven sprocket 33 can be rotatably mounted on the frame 1. The annular chain 31 is tensioned outside the driving sprocket 32 ​​and the driven sprocket 33. The annular guide rail 2 is located outside the annular chain 31. Each of the sliders 4 is connected to the annular chain 31. The driving sprocket 32 ​​is connected to the output shaft of the conveying motor. The conveying motor is used to drive the driving sprocket 32 ​​to rotate, so as to realize the conveying of the annular chain 31. Driven by the annular chain 31, each slider 4 can move along the circumference of the annular guide rail 2. The number of rollers of the driven sprocket 33 can be adjusted according to actual needs and the length of the annular chain 31. Each driven sprocket 33 and the driving sprocket 32 ​​can be used to tension the annular chain 31 according to the required route.

[0036] The nozzle pushing mechanism 5 includes a pushing cylinder 51, a first pushing block 52 and a first guide strip groove 53. The pushing cylinder 51 is installed on the frame 1, and the piston rod of the pushing cylinder 51 faces the nozzle positioning groove 41 on the corresponding slider 4. The first pushing block 52 is installed on the end of the piston rod of the pushing cylinder 51. The first guide strip groove 53 is horizontally installed on the frame 1. An opening of the first guide strip groove 53 corresponds to the first pushing block 52, and a first gap 54 is provided between the opening of the first guide strip groove 53 and the first pushing block 52 for the nozzle positioning groove 41 to pass through. The other opening of the first guide strip groove 53 corresponds to the nozzle positioning groove 41 on the corresponding slider 4. When the external conveying mechanism conveys the self-supporting bag semi-finished products 8 one by one to an opening of the first guide strip groove 53, the first pushing block 52 is driven by the pushing cylinder 51 to accurately push the suction nozzle of the self-supporting bag semi-finished product 8 into the suction nozzle positioning groove 41 along the guidance of the first guide strip groove 53, ensuring that the suction nozzle can be accurately inserted into the corresponding suction nozzle positioning groove 41.

[0037] The nozzle ejection mechanism 7 includes an ejection cylinder 71, a second push block 72 and a second guide strip groove 73. The ejection cylinder 71 is mounted on the frame 1. The piston rod of the ejection cylinder 71 faces the nozzle positioning groove 41 on the corresponding slider 4. The second push block 72 is mounted on the end of the piston rod of the ejection cylinder 71. The second guide strip groove 73 is horizontally mounted on the frame 1. An opening of the second guide strip groove 73 corresponds to the corresponding nozzle positioning groove 41 and the second push block 72 in sequence, and a second gap 74 is provided between the opening of the second guide strip groove 73 and the second push block 72 for the nozzle positioning groove 41 to pass through. When the self-supporting bag products are transported one by one to an opening of the second guide strip groove 73, the ejection cylinder 71 drives the second push block 72 to accurately eject the nozzle of the self-supporting bag product along the guidance of the second guide strip groove 73.

[0038] The present embodiment also includes two waste recovery mechanisms 9, wherein the nozzle pushing mechanism 5, the heat sealing mechanism 6, the nozzle pushing mechanism 7, and the waste recovery mechanism 9 are sequentially arranged on the corresponding linear guide rail section 21 from front to back; the waste recovery mechanism 9 includes a waste pushing cylinder 91, a third pushing block 92, and a recovery box 93, the waste pushing cylinder 91 is installed on the frame, the piston rod of the waste pushing cylinder 91 faces the nozzle positioning groove 41 on the corresponding slider 4, the third pushing block 92 is installed on the end of the piston rod of the waste pushing cylinder 91, and the recovery box 93 is arranged on the other side opposite to the third pushing block 92 and on one side of the corresponding nozzle positioning groove 41.

[0039] Embodiment 2: The difference between this embodiment and embodiment 1 is that:

[0040] The primary sealing unit 61, the secondary sealing unit 62, the tertiary sealing unit 63, and the quaternary sealing unit 65 all include two heat-sealing cylinders 611, two heat-sealing blocks 613, and two heat-sealing strips 614. The two heat-sealing cylinders 611 are both installed on the frame 1. The extension directions of the piston rods of the two heat-sealing cylinders 611 are arranged opposite to each other. The two heat-sealing blocks 613 are respectively installed on the ends of the piston rods of the corresponding heat-sealing cylinders 611. The two heat-sealing strips 614 are installed on the inner sides of the corresponding heat-sealing blocks 613. The nozzle positioning groove 41 on the corresponding slider 4 is located between the two heat-sealing strips 614. Driven by the first driving mechanism 3, the stand-up bag semi-finished product 8 at the nozzle pushing mechanism 5 is moved to the heat sealing mechanism 6, and the bag mouth of the stand-up bag semi-finished product 8 is between the two heat sealing strips 614. The two heat sealing cylinders 611 drive the two heat sealing blocks 613 to clamp towards each other, so that the two heat sealing strips 614 clamp the bag mouth of the stand-up bag semi-finished product 8, and heat seal the bag mouth of the stand-up bag semi-finished product 8 and the nozzle. The double heat sealing cylinder 611 structure can independently control the two heat sealing blocks 613 to achieve a more accurate heat sealing effect.

[0041] The heat sealing strip 614 is an L-shaped strip block, the vertical side 6141 of the L-shaped strip block is installed on the inner side of the heat sealing pressing block 613, and the inner side of the horizontal side 6142 of the L-shaped strip block constitutes the heat sealing surface of the heat sealing strip 614.

[0042] In addition, it should be noted that the names of the various parts of the specific embodiments described in this specification may be different, and any equivalent or simple changes made based on the structure, features and principles described in the patent concept of the present invention are included in the protection scope of the patent of the present invention. The technicians in the technical field of the present invention can make various modifications or supplements to the specific embodiments described or replace them in a similar manner, as long as they do not deviate from the structure of the present invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A double-inlet and double-outlet annular tube sealing machine, characterized in that: It includes a frame, an annular guide rail, a first driving mechanism and a plurality of sliders, as well as two groups of nozzle pushing mechanisms, heat sealing mechanisms and nozzle pushing mechanisms arranged in sequence from front to back, the annular guide rail and the first driving mechanism are both mounted on the frame; each slider is arranged on the annular guide rail along the circumference of the annular guide rail, each slider is connected to the power output end of the first driving mechanism, and each slider can move along the circumference of the annular guide rail, and each slider is provided with at least one nozzle positioning groove; the annular guide rail includes two linear guide rail sections, the nozzle pushing mechanism, the heat sealing mechanism and the nozzle pushing mechanism are arranged in sequence from front to back on the corresponding linear guide rail sections, the power output end of the nozzle pushing mechanism faces the nozzle positioning groove on the corresponding slider, and the power output end of the nozzle pushing mechanism faces the nozzle positioning groove on the corresponding slider; each heat sealing mechanism includes to At least one primary sealing unit, at least one secondary sealing unit, at least one tertiary sealing unit, at least one cold sealing unit and at least one fourth sealing unit, each linear guide rail segment is provided with a primary sealing station, a secondary sealing station, a tertiary sealing station, a cold sealing station and a fourth sealing station corresponding to each slider from front to back, the primary sealing unit corresponds to the nozzle positioning groove on the primary sealing station, the secondary sealing unit corresponds to the nozzle positioning groove on the secondary sealing station, the tertiary sealing unit corresponds to the nozzle positioning groove on the tertiary sealing station, the cold sealing unit corresponds to the nozzle positioning groove on the cold sealing station, and the fourth sealing unit corresponds to the nozzle positioning groove on the fourth sealing station; the heating temperatures of the primary sealing unit, the secondary sealing unit, the tertiary sealing unit and the fourth sealing unit are all greater than the heating temperature of the cold sealing unit.

2. The double-inlet and double-outlet annular tube sealing machine as claimed in claim 1, characterized in that: The primary sealing unit, the secondary sealing unit, the tertiary sealing unit and the quaternary sealing unit all include a heat sealing cylinder, a heat sealing fixing block, two heat sealing blocks and two heat sealing strips. The heat sealing cylinder and the heat sealing fixing block are both installed on the frame. The piston rod of the heat sealing cylinder extends toward the heat sealing fixing block. One heat sealing block is installed on the end of the piston rod of the heat sealing cylinder, and the other heat sealing block is installed on the heat sealing fixing block. The two heat sealing strips are installed on the inner side surfaces of the corresponding heat sealing blocks. The nozzle positioning groove on the corresponding slider is between the two heat sealing strips. The heat sealing strip on one side of the heat sealing fixing block contacts and cooperates with the bag mouth of the semi-finished stand-up bag on the nozzle positioning groove.

3. The double-inlet and double-outlet annular tube sealing machine as claimed in claim 1, characterized in that: The primary sealing unit, the secondary sealing unit, the tertiary sealing unit and the quaternary sealing unit all include two heat-sealing cylinders, two heat-sealing blocks and two heat-sealing strips. The two heat-sealing cylinders are installed on the frame. The extension directions of the piston rods of the two heat-sealing cylinders are arranged opposite to each other. The two heat-sealing blocks are respectively installed on the ends of the piston rods of the corresponding heat-sealing cylinders. The two heat-sealing strips are installed on the inner sides of the corresponding heat-sealing blocks. The nozzle positioning groove on the corresponding slider is located between the two heat-sealing strips.

4. The double-inlet and double-outlet annular tube sealing machine as claimed in claim 2 or 3, characterized in that: The heat sealing strip is an L-shaped strip block, the vertical side of the L-shaped strip block is installed on the inner side of the heat sealing pressing block, and the inner side of the transverse side of the L-shaped strip block constitutes the heat sealing surface of the heat sealing strip.

5. The double-inlet and double-outlet annular tube sealing machine as claimed in claim 1, characterized in that: The cold sealing unit includes a cold sealing cylinder, a cold sealing fixing block, two cold sealing pressing blocks and two cold sealing strips. The cold sealing cylinder and the cold sealing fixing block are both installed on the frame. The piston rod of the cold sealing cylinder extends toward the cold sealing fixing block. One cold sealing pressing block is installed on the end of the piston rod of the cold sealing cylinder, and the other cold sealing pressing block is installed on the cold sealing fixing block. Cooling channels for cold water flow are provided in the two cold sealing pressing blocks. The two cold sealing pressing blocks are installed on the inner side surfaces of the corresponding cold sealing pressing blocks. The suction nozzle positioning groove on the corresponding slider is between the two cold sealing strips. The cold sealing strip on one side of the cold sealing fixing block contacts and cooperates with the bag mouth of the semi-finished stand-up bag on the suction nozzle positioning groove.

6. The double-inlet and double-outlet annular tube sealing machine as claimed in claim 5, characterized in that: The inner sides of the two cold seal strips are both provided with mesh patterns.

7. The double-inlet and double-outlet annular tube sealing machine as claimed in claim 1, characterized in that: The first driving mechanism includes an annular chain, a conveying motor, a driving sprocket and at least one driven sprocket. The conveying motor is installed on a frame. The driving sprocket and the driven sprocket are rotatably installed on the frame. The annular chain is tensioned outside the driving sprocket and the driven sprocket. The annular guide rail is located outside the annular chain. Each of the sliders is connected to the annular chain. The driving sprocket is drivingly connected to the output shaft of the conveying motor.

8. The double-inlet and double-outlet annular tube sealing machine as claimed in claim 1, characterized in that: The nozzle pushing mechanism includes a pushing cylinder, a first pushing block and a first guide strip groove. The pushing cylinder is installed on the frame, and the piston rod of the pushing cylinder faces the nozzle positioning groove on the corresponding slider. The first pushing block is installed on the end of the piston rod of the pushing cylinder. The first guide strip groove is horizontally installed on the frame. An opening of the first guide strip groove corresponds to the first pushing block, and a first gap is provided between the opening of the first guide strip groove and the first pushing block for the nozzle positioning groove to pass through. The other opening of the first guide strip groove corresponds to the nozzle positioning groove on the corresponding slider.

9. The double-inlet and double-outlet annular pipe sealing machine as claimed in claim 1, characterized in that: The nozzle pushing mechanism includes a pushing cylinder, a second pushing block and a second guide strip groove. The pushing cylinder is installed on the frame, and the piston rod of the pushing cylinder faces the nozzle positioning groove on the corresponding slider. The second pushing block is installed on the end of the piston rod of the pushing cylinder. The second guide strip groove is horizontally installed on the frame. An opening of the second guide strip groove corresponds to the corresponding nozzle positioning groove and the second pushing block in sequence, and a second gap is provided between the opening of the second guide strip groove and the second pushing block for the nozzle positioning groove to pass through.

10. The double-inlet and double-outlet annular tube sealing machine as claimed in claim 1, characterized in that: It also includes two waste recovery mechanisms, wherein the suction nozzle pushing mechanism, the heat sealing mechanism, the suction nozzle pushing mechanism, and the waste recovery mechanism are sequentially arranged on the corresponding linear guide rail sections from front to back; the waste recovery mechanism includes a waste pushing cylinder, a third pushing block, and a recovery box, the waste pushing cylinder is installed on the frame, the piston rod of the waste pushing cylinder faces the suction nozzle positioning groove on the corresponding slider, the third pushing block is installed on the end of the piston rod of the waste pushing cylinder, and the recovery box is arranged on the other side opposite to the third pushing block and on one side of the corresponding suction nozzle positioning groove.

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