PUR canning jig for production

Abstract

The utility model discloses a PUR canning jig for production, and relates to the technical field of hot melt adhesive filling, a reaction kettle comprises a first tank body and a second tank body located at the bottom of the first tank body, the size of the second tank body is smaller than that of the first tank body, and a heating assembly heats the reaction kettle. The top of the first tank body is respectively connected with the first nitrogen conveying device and the first vacuum pump, the stirring device is used for stirring the hot melt adhesive in the reaction kettle, the bottom of the second tank body is connected with the discharging pipe, and the first pressure gauge, the first valve and the second valve are arranged on the discharging pipe. The first pressure gauge detects the pressure in the discharging pipe to reflect whether bubbles exist in the hot melt adhesive or not, if the bubbles exist, the stirring device cooperates with the first vacuum pump to conduct vacuum defoaming on the hot melt adhesive, the hot melt adhesive does not need to be discharged from the reaction kettle to a gallon barrel for bubble discharging, loss of the hot melt adhesive in the gallon barrel is avoided, and the production efficiency is improved. In the filling process, the link of heating the hot melt adhesive in the gallon barrel by using a pressure plate is omitted, and only the reaction kettle needs to be heated, so that the loss of the hot melt adhesive and the energy consumption are reduced.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of hot melt glue filling, in particular to a jig for filling polyurethane reactive (PUR) glue. BACKGROUND

[0002] At present, the method for filling the wet gas curing reaction type polyurethane reactive (PUR) glue into the 310 aluminum pipe is as follows: after the reaction of the PUR glue is completed, the hot melt glue in the reaction kettle is filled into a gallon bucket, the mouth is sealed under the protection of nitrogen, and after the glue is cooled overnight, the next day, the bag is broken, the hot melt glue is heated by using a pressing disc, and the hot melt glue is filled into the 310 aluminum pipe. The main reason is that the reaction kettle generally starts to have bubbles when the discharge reaches more than 85%, so the hot melt glue needs to be discharged from the reaction kettle to the gallon bucket for bubble removal and cooling. If the bubble removal action is not performed, the glue line is discontinuous, the glue output is unstable, and the like defects are caused by the bubbles in the glue during use. The filling method has residues in the reaction kettle and the gallon bucket. The residue in the reaction kettle is generally 4%, and the residue in the 20kg gallon bucket is generally 800g of glue. At present, the best pressing disc heating system is used in the market, and the residue in the 20kg gallon bucket is generally 600g of glue. Therefore, the cumulative loss of glue in the reaction kettle and the gallon bucket is 7%-8%. In addition, the hot melt glue needs to be heated when being discharged from the reaction kettle to the gallon bucket, and the hot melt glue also needs to be heated when being discharged from the gallon bucket to the aluminum pipe, so that the energy consumption is high.

[0003] Therefore, how to reduce the loss of the hot melt glue and the energy consumption is a problem to be solved by those skilled in the art. CONTENT OF THE UTILITY MODEL

[0004] The application aims to provide a jig for filling the PUR glue in production, so as to solve the problems of large loss of the hot melt glue and high energy consumption in the filling method.

[0005] To solve the above technical problems, the application provides a jig for filling the PUR glue in production, which comprises a reaction kettle, a heating assembly, a first nitrogen conveying device, a first vacuum pump, a stirring device, a discharge pipe, a first pressure gauge, a first valve and a second valve.

[0006] The reaction kettle comprises a first tank body and a second tank body in communication with the first tank body, the second tank body is located at the bottom of the first tank body, and the volume of the second tank body is smaller than that of the first tank body; the heating assembly is arranged outside the reaction kettle and is used for heating the hot melt adhesive in the reaction kettle; the top of the first tank body is connected with the first nitrogen conveying device and the first vacuum pump respectively; the stirring device is used for stirring the hot melt adhesive in the reaction kettle; the bottom outlet of the second tank body is connected with the discharge pipe, and the discharge pipe is used for conveying the hot melt adhesive to an aluminum pipe; the first pressure gauge, the first valve and the second valve are arranged on the discharge pipe, and the first pressure gauge is located between the first valve and the second valve and is used for detecting the pressure in the discharge pipe in real time.

[0007] In an available embodiment, the stirring device comprises a motor, a stirring rod, a connecting frame, a scraper, a connecting rod and stirring blades, the first end of the stirring rod is connected with the motor, the second end of the stirring rod is inserted into the first tank body through the top of the first tank body and extends into the second tank body, the second end of the stirring rod is connected with the middle part of the connecting rod, the two ends of the connecting rod are respectively connected with the stirring blades, the connecting frame is a rectangular frame composed of two longitudinal plates, a first transverse plate and a second transverse plate, the middle part of the first transverse plate and the middle part of the second transverse plate are connected with the stirring rod, the scraper is arranged on the longitudinal plate, a plurality of the scrapers are arranged at intervals along the axial direction of the first tank body, and the scraper abuts against the inner side wall of the first tank body, and the second transverse plate abuts against the bottom surface of the first tank body.

[0008] In an available embodiment, the stirring blades are S-shaped stirring blades, the ends of the connecting rod are connected with the middle part of the S-shaped stirring blades, and the length direction of the S-shaped stirring blades is parallel to the axial direction of the second tank body.

[0009] In an available embodiment, the stirring device further comprises a third transverse plate, the middle part of the third transverse plate is connected with the stirring rod, and the third transverse plate is located between the first transverse plate and the second transverse plate.

[0010] In an embodiment, the heating assembly comprises a heating tank, an input pipe, an output pipe, a second vacuum pump, a third valve, a fourth valve and a mold temperature controller, the reaction kettle is arranged in the heating tank, the input pipe is connected with the inlet of the heating tank and the outlet of the mold temperature controller respectively, the output pipe is connected with the outlet of the heating tank and the inlet of the mold temperature controller respectively, the second vacuum pump and the third valve are arranged on the input pipe, the fourth valve is arranged on the output pipe, the input pipe is used for conveying heat conducting oil into the heating tank, and the mold temperature controller is used for regulating the temperature of the heat conducting oil.

[0011] In an embodiment, a fifth valve and a vacuum metering pump with a heating jacket are arranged on the discharge pipe, the vacuum metering pump is located between the second valve and the fifth valve, and the first valve is arranged close to the bottom outlet of the second tank.

[0012] In an embodiment, a filtering device detachably connected with the bottom outlet of the second tank is further included, the filtering device is used for filtering dregs in the hot melt adhesive, and the discharge pipe is connected with the bottom outlet of the second tank through the filtering device.

[0013] In an embodiment, a conveying belt device, a nitrogen tank and a second nitrogen conveying device connected with the nitrogen tank are further included, the conveying belt device is used for conveying aluminum pipes, the bottom of the nitrogen tank is provided with a passage for the aluminum pipes to pass through, the discharge pipe extends into the nitrogen tank, an end of the discharge pipe is provided with a glue filling opening, and the glue filling opening is located above the aluminum pipes.

[0014] In an embodiment, a capping machine and a sealing device arranged in the nitrogen tank are further included, the capping machine is used for pressing a tail plug into an aluminum pipe filled with hot melt adhesive, and the sealing device is used for sealing the aluminum pipe.

[0015] In an embodiment, a second pressure gauge and a sixth valve are arranged on the pipeline connecting the first nitrogen conveying device with the first tank, a seventh valve is arranged on the pipeline connecting the first vacuum pump with the first tank, and a third pressure gauge and an eighth valve are arranged on the pipeline connecting the second nitrogen conveying device with the nitrogen tank.

[0016] The utility model provides a kind of production of the jig of PUR tank loading, comprising: reaction kettle, heating component, first nitrogen conveying device, first vacuum pump, stirring device, discharge pipe, first pressure gauge, first valve and second valve;Reaction kettle includes first tank body and with the first tank body communication second tank body, second tank body is located the bottom of first tank body, and the volume of second tank body is less than the volume of first tank body, heating component is located the outside of reaction kettle, for heating hot melt adhesive in reaction kettle, the top of first tank body is connected with first nitrogen conveying device and first vacuum pump respectively, stirring device is used to stir hot melt adhesive in reaction kettle, the bottom outlet of second tank body is connected with discharge pipe, and discharge pipe is used to deliver hot melt adhesive to aluminium pipe, first pressure gauge, first valve and second valve are all located on discharge pipe, and first pressure gauge is located between first valve and second valve, and first pressure gauge is used to detect the pressure in discharge pipe in real time.The pressure in discharge pipe detected by first pressure gauge is used to react hot melt adhesive whether there is bubble, if there is bubble, stirring device cooperates first vacuum pump and carries out vacuum defoaming to hot melt adhesive, so as to be not needed from reaction kettle to gallon bucket hot melt adhesive is discharged to carry out bubble removal, effectively avoid the loss of hot melt adhesive in gallon bucket, and the filling process is exempted from the link of heating hot melt adhesive in gallon bucket using pressure disc, and only needs to heat reaction kettle, to reduce the loss of hot melt adhesive while also reducing energy consumption. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application, the following will be briefly introduced the drawings needed to be used in the embodiments, obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating labor.

[0018] Figure 1 The structural diagram of the jig for production of PUR tank loading provided by the embodiments of the present application.

[0019] The signs are as follows: 1-reaction kettle, 101-first tank body, 102-second tank body, 2-first nitrogen conveying device, 3-first vacuum pump, 4-discharge pipe, 5-first pressure gauge, 6-first valve, 7-second valve, 8-stirring rod, 9-vertical plate, 10-first horizontal plate, 11-second horizontal plate, 12-scraper, 13-connecting rod, 14-stirring blade, 15-third horizontal plate, 16-heating tank body, 17-second vacuum pump, 18-third valve, 19-fourth valve, 20-mold temperature controller, 21-vacuum metering pump, 22-fifth valve, 23-filtering device, 24-conveying belt device, 25-nitrogen tank, 26-second nitrogen conveying device, 27-glue filling port, 28-capping machine, 29-aluminium pipe, 30-sealing device, 31-second pressure gauge, 32-sixth valve, 33-seventh valve, 34-third pressure gauge, 35-eighth valve. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0021] The core of the present application is to provide a structure diagram of a production PUR tank tool, which is used to reduce the loss of hot melt adhesive and energy consumption.

[0022] In order to enable the persons in the technical field to better understand the present application, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0023] Figure 1 A structure diagram of a production PUR tank tool provided by the present application is shown in Figure 1 The production PUR tank tool includes a reaction kettle 1, a heating assembly, a first nitrogen conveying device 2, a first vacuum pump 3, a stirring device, a discharge pipe 4, a first pressure gauge 5, a first valve 6 and a second valve 7. The reaction kettle 1 includes a first tank body 101 and a second tank body 102 in communication with the first tank body 101. The second tank body 102 is located at the bottom of the first tank body 101, and the volume of the second tank body 102 is smaller than that of the first tank body 101. The heating assembly is arranged outside the reaction kettle 1 and is used to heat the hot melt adhesive in the reaction kettle 1. The top of the first tank body 101 is connected with the first nitrogen conveying device 2 and the first vacuum pump 3, respectively. The stirring device is used to stir the hot melt adhesive in the reaction kettle 1. The bottom outlet of the second tank body 102 is connected with the discharge pipe 4, which is used to convey the hot melt adhesive to an aluminum pipe 29. The first pressure gauge 5, the first valve 6 and the second valve 7 are all arranged on the discharge pipe 4, and the first pressure gauge 5 is located between the first valve 6 and the second valve 7. The first pressure gauge 5 is used to detect the pressure in the discharge pipe 4 in real time.

[0024] The shapes of the first tank body 101 and the second tank body 102 are not limited in the embodiments of the present application. The second tank body 102 is located below the first tank body 101, and the first tank body 101 and the second tank body 102 are coaxially arranged. Since the hot melt adhesive has good heat resistance and can flow at high temperature, the hot melt adhesive is always heated by the heating assembly to ensure flow, thereby effectively achieving canning. When bubbles are encountered, the first valve 6 and the second valve 7 can be closed to re-debubble. Since the first tank body 101 and the second tank body 102 are connected, when further debubbling is needed, the stirring device can be used to fill as much residual hot melt adhesive in the first tank body 101 into the second tank body 102 as possible to complete debubbling. The debubbled hot melt adhesive can continue to be filled, thereby reducing the residue in the reaction kettle. The heating assembly is not limited in the embodiments of the present application. The heating assembly is used to heat the reaction kettle 1 to prevent the hot melt adhesive from solidifying. The first nitrogen gas delivery device 2 is not limited in the embodiments of the present application. The first nitrogen gas delivery device 2 can include a nitrogen tank and a delivery pump connected to the nitrogen tank. The first nitrogen gas delivery device 2 is used to deliver nitrogen gas to the first tank body 101. The hot melt adhesive in the reaction kettle 1 is driven downward by the nitrogen gas. Nitrogen gas is an inert gas that can isolate air and reduce the contact of the hot melt adhesive with oxygen, thereby reducing the risk of oxidation and carbonization. When the pressure fluctuation detected by the first pressure gauge 5 is large, it indicates that there are many bubbles in the hot melt adhesive in the discharge pipe 4. The first valve 6, the second valve 7 and the first nitrogen gas delivery device 2 are closed to temporarily stop the discharge of the hot melt adhesive in the discharge pipe 4. The stirring device is started to stir the hot melt adhesive in the reaction kettle 1, and the first vacuum pump 3 is started to vacuum the reaction kettle 1 to discharge the bubbles in the hot melt adhesive in the reaction kettle 1.

[0025] The embodiment provided by the application is a production PUR tank jig, which comprises a reaction kettle 1, a heating assembly, a first nitrogen conveying device 2, a first vacuum pump 3, a stirring device, a discharge pipe 4, a first pressure gauge 5, a first valve 6 and a second valve 7. The reaction kettle 1 comprises a first tank body 101 and a second tank body 102 in communication with the first tank body 101. The second tank body 102 is located at the bottom of the first tank body 101, and the volume of the second tank body 102 is smaller than that of the first tank body 101. The heating assembly is arranged outside the reaction kettle 1 and is used for heating the hot melt adhesive in the reaction kettle 1. The top of the first tank body 101 is connected with the first nitrogen conveying device 2 and the first vacuum pump 3, respectively. The stirring device is used for stirring the hot melt adhesive in the reaction kettle 1. The bottom outlet of the second tank body 102 is connected with the discharge pipe 4, which is used for conveying the hot melt adhesive to an aluminum pipe 29. The first pressure gauge 5, the first valve 6 and the second valve 7 are all arranged on the discharge pipe 4, and the first pressure gauge 5 is located between the first valve 6 and the second valve 7. The first pressure gauge 5 is used for detecting the pressure in the discharge pipe 4 in real time. The pressure in the discharge pipe 4 detected by the first pressure gauge 5 is used to determine whether there is a bubble in the hot melt adhesive. If there is a bubble, the stirring device cooperates with the first vacuum pump 3 to perform vacuum defoaming on the hot melt adhesive, so that the hot melt adhesive does not need to be discharged from the reaction kettle 1 to a gallon bucket for bubble removal, effectively avoiding the loss of the hot melt adhesive in the gallon bucket, and the filling process eliminates the step of heating the hot melt adhesive in the gallon bucket by using a pressure disc. Only the reaction kettle 1 needs to be heated, thereby reducing the loss of the hot melt adhesive and the energy consumption.

[0026] Based on the above embodiment, the stirring device comprises a motor, a stirring rod 8, a connecting frame, a scraper 12, a connecting rod 13 and stirring blades 14. The first end of the stirring rod 8 is connected with the motor. The second end of the stirring rod 8 is inserted into the first tank body 101 through the top of the first tank body 101 and extends into the second tank body 102. The second end of the stirring rod 8 is connected with the middle part of the connecting rod 13. The two ends of the connecting rod 13 are respectively connected with the stirring blades 14. The connecting frame is a rectangular frame composed of two longitudinal plates 9, a first horizontal plate 10 and a second horizontal plate 11. The middle part of the first horizontal plate 10 and the middle part of the second horizontal plate 11 are both connected with the stirring rod 8. The scraper 12 is arranged on the longitudinal plate 9. A plurality of scrapers 12 are arranged at intervals along the axial direction of the first tank body 101, and the scraper 12 abuts against the inner side wall of the first tank body 101. The second horizontal plate 11 abuts against the bottom surface of the first tank body 101.

[0027] In the embodiment of the present application, the scraper 12 abuts against the inner side wall of the first tank body 101, the second horizontal plate 11 abuts against the bottom surface of the first tank body 101, and when the motor drives the stirring rod 8 to rotate, the scraper 12 and the second horizontal plate 11 can scrape the edges and bottoms of the hot melt adhesive in the second tank body 102, respectively, and the stirring blade 14 can stir the hot melt adhesive in the second tank body 102, so that the hot melt adhesive in the entire reaction kettle 1 can be stirred, and the hot melt adhesive can be prevented from being overheated locally when the heating assembly heats the hot melt adhesive; most importantly, the stirring device can scrape the edges and bottoms of the hot melt adhesive in the first tank body 101, so that as much hot melt adhesive as possible in the first tank body 101 can move downward to the second tank body 102, the stirring blade 14 can stir and deaerate the hot melt adhesive in the second tank body 102, and the deaerated hot melt adhesive can continue to be filled into the aluminum pipe, thereby being beneficial to reducing the residual hot melt adhesive in the reaction kettle. In the embodiment of the present application, the middle part of the first horizontal plate 10 and the middle part of the second horizontal plate 11 can be welded with the stirring rod 8, the length direction of the first horizontal plate 10 and the second horizontal plate 11 is parallel to the radial direction of the first tank body 101, the two ends of the vertical plate 9 are connected with the end of the first horizontal plate 10 and the end of the second horizontal plate 11, respectively, and the length direction of the vertical plate 9 is parallel to the axial direction of the second tank body 102. The length direction of each vertical plate 9 is spaced apart from each other and provided with a plurality of scrapers 12, so that the plurality of scrapers 12 are spaced apart from each other along the axial direction of the first tank body 101, thereby being capable of scraping the hot melt adhesive on the inner side wall of the first tank body 101 sufficiently.

[0028] Based on the above embodiment, the stirring blade 14 in the embodiment of the present application is an S-shaped stirring blade, the end of the connecting rod 13 is connected with the middle part of the S-shaped stirring blade, and the length direction of the S-shaped stirring blade is parallel to the axial direction of the second tank body 102.

[0029] In the embodiment of the present application, the two ends of the connecting rod 13 are connected with the S-shaped stirring blades, respectively. The S-shaped stirring blade is composed of two arc-shaped blades which are connected integrally, the arc-shaped openings of the arc-shaped blades located at the upper part of the two S-shaped stirring blades are consistent in direction, and the arc-shaped openings of the arc-shaped blades located at the lower part of the two S-shaped stirring blades are consistent in direction. In the embodiment of the present application, the stirring blade 14 is arranged as an S-shaped stirring blade, and the length direction of the S-shaped stirring blade is parallel to the axial direction of the second tank body 102, and the purpose is that the S-shaped stirring blade can generate axial flow, which is helpful to realize the up-down circulation of the hot melt adhesive and facilitate vertical mixing, and the design of the S-shaped stirring blade is also helpful to reduce the formation of turbulent flow.

[0030] Based on the above embodiment, the stirring device in the embodiment of the present application further comprises a third horizontal plate 15, the middle part of the third horizontal plate 15 is connected with the stirring rod 8, and the third horizontal plate 15 is located between the first horizontal plate 10 and the second horizontal plate 11.

[0031] The number of the third transverse plates 15 is not specifically limited in the embodiment of the present application, and a plurality of third transverse plates 15 can be arranged, which are spaced apart along the length direction of the stirring rod 8 and parallel to the radial direction of the first tank body 101. The third transverse plates 15 are arranged to realize turbulent disturbance and improve mixing efficiency, so that the stirring is more uniform.

[0032] Based on the above embodiment, the heating assembly of the embodiment of the present application comprises a heating tank body 16, an input pipe, an output pipe, a second vacuum pump 17, a third valve 18, a fourth valve 19 and a mold temperature machine 20. The reaction kettle 1 is arranged in the heating tank body 16. The input pipe is connected to the inlet of the heating tank body 16 and the outlet of the mold temperature machine 20 respectively. The output pipe is connected to the outlet of the heating tank body 16 and the inlet of the mold temperature machine 20 respectively. The second vacuum pump 17 and the third valve 18 are arranged on the input pipe. The fourth valve 19 is arranged on the output pipe. The input pipe is used to transport the heat conducting oil into the heating tank body 16. The mold temperature machine 20 is used to regulate the temperature of the heat conducting oil.

[0033] The mold temperature machine 20 in the embodiment of the present application is the existing one, which will not be described in detail. The mold temperature machine 20 is mainly used to control the temperature of the heat conducting oil to avoid the temperature of the heat conducting oil being too high or too low. The following advantages are obtained by using the heat conducting oil to heat the reaction kettle 1: the heat conducting oil heating has no steam leakage and condensate water discharge problem compared with the steam heating, which improves the safety of the device; the heat conducting oil heating has higher heat efficiency and smaller heat loss compared with the traditional electric heating method, which can save energy.

[0034] Based on the above embodiment, the discharge pipe 4 is further provided with a vacuum metering pump 21 with a heating jacket and a fifth valve 22 in the embodiment of the present application. The vacuum metering pump 21 is located between the second valve 7 and the fifth valve 22. The first valve 6 is arranged close to the bottom outlet of the second tank body 102. The heating jacket in the embodiment of the present application heats the hot melt adhesive when the vacuum metering pump 21 transports the hot melt adhesive, which effectively avoids the hot melt adhesive changing from liquid to solid during the transportation process.

[0035] Based on the above embodiment, the embodiment of the present application further comprises a filter device 23 detachably connected to the bottom outlet of the second tank body 102. The filter device 23 is used to filter the dregs in the hot melt adhesive. The discharge pipe 4 is connected to the bottom outlet of the second tank body 102 through the filter device 23.

[0036] The specific way in which the filter device 23 is detachably connected to the bottom outlet of the second tank body 102 is not limited in the embodiment of the present application, which can be threadedly connected or buckled connected. The filter device 23 comprises a shell and a filter screen arranged in the shell. The dregs in the hot melt adhesive are filtered by using the filter device 23, which can improve the quality of the hot melt adhesive in the aluminum pipe 29. In addition, the filter device 23 is detachably connected to the second tank body 102, which can facilitate replacement of the filter screen in the filter device 23.

[0037] Based on the above embodiment, the application further comprises a conveying belt device 24 for conveying the aluminum pipe 29, a nitrogen tank 25 provided with a passage for the aluminum pipe 29 to pass through, and a second nitrogen conveying device 26 connected to the nitrogen tank 25. The discharge pipe 4 extends into the nitrogen tank 25, and the end of the discharge pipe 4 is provided with a glue pouring port 27 located above the aluminum pipe 29. Further, a capping machine 28 and a sealing device 30 are arranged in the nitrogen tank 25. The capping machine 28 is used to press a tail plug into the aluminum pipe 29 filled with hot melt glue, and the sealing device 30 is used to seal the aluminum pipe 29.

[0038] In the application, the hot melt glue flows into the aluminum pipe 29 through the glue pouring port 27. The conveying belt device 24 conveys the aluminum pipe 29 to the capping machine 28, the capping machine 28 presses a tail plug into the aluminum pipe 29 filled with hot melt glue, and the fixing of the hot melt glue is completed. The conveying belt device 24 further conveys the aluminum pipe 29 to the sealing device 30, and the sealing device 30 seals the aluminum pipe 29. The capping machine 28 in the application can be a pneumatic cylinder, which is used to press the tail plug into the aluminum pipe 29 filled with hot melt glue. A mechanical hand can also be provided to place the tail plug into the aluminum pipe 29. The sealing device 30 in the application is existing and will not be described here. By arranging the nitrogen tank 25 and the second nitrogen conveying device 26, the whole process from the filling port to the capping machine 28 and then to the sealing device 30 is protected by nitrogen, which prevents the reaction between water vapor in the air and the hot melt glue. The whole process is in a nitrogen atmosphere, and there is no need to add a bag-shaped desiccant into the aluminum pipe 29.

[0039] Based on the above embodiment, the second pressure gauge 31 and the sixth valve 32 are arranged on the pipeline connected between the first nitrogen conveying device 2 and the first tank 101. The seventh valve 33 is arranged on the pipeline connected between the first vacuum pump 3 and the first tank 101. The third pressure gauge 34 and the eighth valve 35 are arranged on the pipeline connected between the second nitrogen conveying device 26 and the nitrogen tank 25.

[0040] In the application, the second pressure gauge 31 and the sixth valve 32 are arranged on the pipeline connected between the first nitrogen conveying device 2 and the first tank 101. The opening degree of the sixth valve 32 can be adjusted according to the pressure data detected by the second pressure gauge 31, so as to control the flow speed of the hot melt glue. The seventh valve 33 is arranged on the pipeline connected between the first vacuum pump 3 and the first tank 101, which can prevent backflow and stabilize pressure. The third pressure gauge 34 and the eighth valve 35 are arranged on the pipeline connected between the second nitrogen conveying device 26 and the nitrogen tank 25, and the opening degree of the eighth valve 35 can also be adjusted according to the pressure data detected by the third pressure gauge 34. The second nitrogen conveying device 26 can comprise a nitrogen storage tank and a conveying pump connected to the nitrogen storage tank.

[0041] The above describes in detail the jig for producing the PUR tank for packaging. The embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts of each embodiment can be understood by referring to each other. It should be noted that, for those skilled in the art, some improvements and modifications can be made to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

[0042] It should also be noted that in the specification, the relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of other identical elements in the process, method, article or device including the element.

Claims

1. A jig for producing PUR cans, characterized in that, include: Reactor (1), heating assembly, first nitrogen delivery device (2), first vacuum pump (3), stirring device, discharge pipe (4), first pressure gauge (5), first valve (6) and second valve (7); The reactor (1) includes a first tank (101) and a second tank (102) connected to the first tank (101). The second tank (102) is located at the bottom of the first tank (101), and the volume of the second tank (102) is smaller than the volume of the first tank (101). The heating assembly is located outside the reactor (1) and is used to heat the hot melt adhesive inside the reactor (1). The top of the first tank (101) is connected to the first nitrogen delivery device (2) and the first vacuum pump (3) respectively. Next, the stirring device is used to stir the hot melt adhesive in the reaction vessel (1). The bottom outlet of the second tank (102) is connected to the discharge pipe (4). The discharge pipe (4) is used to transport the hot melt adhesive to the aluminum pipe (29). The first pressure gauge (5), the first valve (6) and the second valve (7) are all located on the discharge pipe (4). The first pressure gauge (5) is located between the first valve (6) and the second valve (7). The first pressure gauge (5) is used to detect the pressure in the discharge pipe (4) in real time.

2. The fixture for PUR canning production according to claim 1, characterized in that, The stirring device includes a motor, a stirring rod (8), a connecting frame, a scraper (12), a connecting rod (13), and stirring blades (14). The first end of the stirring rod (8) is connected to the motor. The second end of the stirring rod (8) is sealed through the top of the first tank (101) and inserted into the first tank (101) and extends into the second tank (102). The second end of the stirring rod (8) is connected to the middle of the connecting rod (13). The two ends of the connecting rod (13) are respectively connected to the stirring blades (14). The connecting frame is a rectangular frame consisting of two vertical plates (9), a first horizontal plate (10), and a second horizontal plate (11). The middle part of the first horizontal plate (10) and the middle part of the second horizontal plate (11) are connected to the stirring rod (8). The scraper (12) is located on the vertical plate (9). Multiple scrapers (12) are spaced apart along the axial direction of the first tank (101), and the scraper (12) abuts against the inner side wall of the first tank (101). The second horizontal plate (11) abuts against the bottom surface of the first tank (101).

3. The fixture for PUR canning production according to claim 2, characterized in that, The stirring blade (14) is an S-shaped stirring blade. The end of the connecting rod (13) is connected to the middle of the S-shaped stirring blade, and the length direction of the S-shaped stirring blade is parallel to the axial direction of the second tank (102).

4. The fixture for PUR canning in production according to claim 2, characterized in that, The stirring device also includes a third horizontal plate (15), the middle part of which is connected to the stirring rod (8), and the third horizontal plate (15) is located between the first horizontal plate (10) and the second horizontal plate (11).

5. The fixture for PUR canning production according to claim 1, characterized in that, The heating assembly includes a heating tank (16), an input pipe, an output pipe, a second vacuum pump (17), a third valve (18), a fourth valve (19), and a mold temperature controller (20). The reactor (1) is located inside the heating tank (16). The input pipe is connected to the inlet of the heating tank (16) and the outlet of the mold temperature controller (20). The output pipe is connected to the outlet of the heating tank (16) and the inlet of the mold temperature controller (20). The second vacuum pump (17) and the third valve (18) are located on the input pipe, and the fourth valve (19) is located on the output pipe. The input pipe is used to deliver heat transfer oil into the heating tank (16), and the mold temperature controller (20) is used to regulate the temperature of the heat transfer oil.

6. The fixture for PUR canning in production according to claim 1, characterized in that, The discharge pipe (4) is also equipped with a fifth valve (22) and a vacuum metering pump (21) with a heating jacket. The vacuum metering pump (21) is located between the second valve (7) and the fifth valve (22). The first valve (6) is located near the bottom outlet of the second tank (102).

7. The fixture for PUR canning production according to claim 6, characterized in that, It also includes a filter device (23) detachably connected to the bottom outlet of the second tank (102), the filter device (23) being used to filter out slag in the hot melt adhesive, and the discharge pipe (4) being connected to the bottom outlet of the second tank (102) via the filter device (23).

8. The fixture for PUR canning in production according to claim 1, characterized in that, It also includes a conveyor belt device (24), a nitrogen tank (25) and a second nitrogen conveying device (26) connected to the nitrogen tank (25). The conveyor belt device (24) is used to convey aluminum tubes (29). The bottom of the nitrogen tank (25) is provided with a channel for the aluminum tubes (29) to pass through. The discharge pipe (4) extends into the nitrogen tank (25). The end of the discharge pipe (4) is provided with a glue-filling port (27). The glue-filling port (27) is located above the aluminum tubes (29).

9. The fixture for PUR canning in production according to claim 8, characterized in that, It also includes a capping machine (28) and a sealing device (30) located in the nitrogen tank (25). The capping machine (28) is used to press the tail plug into the aluminum tube (29) containing hot melt adhesive, and the sealing device (30) is used to seal the aluminum tube (29).

10. The fixture for PUR canning production according to claim 8, characterized in that, The pipeline connecting the first nitrogen delivery device (2) to the first tank (101) is equipped with a second pressure gauge (31) and a sixth valve (32), the pipeline connecting the first vacuum pump (3) to the first tank (101) is equipped with a seventh valve (33), and the pipeline connecting the second nitrogen delivery device (26) to the nitrogen tank (25) is equipped with a third pressure gauge (34) and an eighth valve (35).

Images