A woven bag masterbatch production process and production equipment

Abstract

The present invention discloses a woven bag masterbatch production process and production equipment, including a feed casing, a feed port is provided on the feed casing, a filling hopper is correspondingly provided on the feed port, a calcium carbonate storage bin is provided on one side of the filling hopper, and the filling hopper and the calcium carbonate storage bin are connected through a feed pipe; a power transmission device is connected to one side of the twin-screw pusher, and the power transmission device is used to drive the twin-screw pusher to work, and the power transmission device consists of a transmission casing, a gear transmission installed in the transmission casing, and a power motor linked to the gear transmission; the present invention relates to the technical field of woven bag masterbatch production, and adopts a filling granulation method to produce the masterbatch of woven bags, a large amount of calcium carbonate is used as a filler in the masterbatch raw materials to improve the smoothness and hardness of the woven bag masterbatch, and special production equipment is set to match the application of calcium carbonate powder.

Description

Technical Field

[0001] The invention relates to the technical field of woven bag masterbatch production, and in particular to a woven bag masterbatch production process and production equipment. Background Art

[0002] Modern woven bag production mostly uses plastic materials. In order to ensure the quality of woven bags, prefabricated plastic particles are often used to facilitate the addition of materials and improve material consistency during woven bag production. At this stage, the masterbatch production of woven bags mostly uses granulators for granulation production.

[0003] In the current production process of woven bag masterbatch, mixing and granulation are the key steps to determine the quality of woven bag masterbatch. Unstable mixing temperature or impurities and changes in mixing ratio may lead to unqualified quality of woven bag masterbatch. Granulation is mainly based on the coordination of mold and pelletizing device. Controlling the discharge rate of the mold and the pelletizing rate is the key to controlling the granulation quality.

[0004] In the current production of woven bag masterbatches, calcium carbonate is mostly used as a filler, and the proportion of fillers is changed according to the different needs of the woven bags. In conventional woven bag production, the application ratio of calcium carbonate as an inorganic filler is usually 10%-30%. However, in some woven bag applications, due to the high demand for the strength of the woven bags, in order to improve the strength of the woven bag masterbatch and save production costs, the application ratio of calcium carbonate filler will be increased, which requires a large amount of calcium carbonate powder as an inorganic filler.

[0005] In the modern production process of woven bag masterbatch, vacuum feeding is often used to feed calcium carbonate powder. However, in the vacuum feeding method, when the calcium carbonate powder enters the buffer hopper, due to the fine particles of the powder, it is easy to generate dust to pollute the vacuum pump.

[0006] In addition, calcium carbonate powder is mostly stored in storage tanks, which have high requirements for temperature and humidity. However, during the application process, calcium carbonate will inevitably come into contact with air during the transportation and distribution process, and will bring in some moisture. As a result, some calcium carbonate will clump, and the powder will easily clog the feeding channel due to contact with moisture and agglomeration during the feeding process, resulting in inaccurate material metering or discontinuous material transportation, resulting in unstable quality of the finished product. The agglomeration will first damage the screw of the mixing extrusion, and secondly, the agglomeration will affect the stability of the extrusion granulation.

[0007] In the current processing technology of woven bag masterbatch, the solution to the above problems is often to increase the addition range of inorganic fillers and rely on high melting temperature to remove moisture from calcium carbonate. However, this method is unstable in controlling the components in the woven bag masterbatch and imposes a heavy burden on the machine body. Secondly, the calcium carbonate powder needs to be processed and transported, resulting in a waste of some energy and materials. In view of this, in-depth research on the above problems led to the creation of this case. Summary of the invention

[0008] In view of the deficiencies of the prior art, the present invention provides a woven bag masterbatch production process and production equipment, which solve the existing background technology problems.

[0009] To achieve the above purpose, the present invention is implemented through the following technical solutions: a production equipment for woven bag masterbatch, including a feed casing, a feed port is provided on the feed casing, a filling hopper is correspondingly provided on the feed port, a calcium carbonate storage bin is provided on one side of the filling hopper, and the filling hopper and the calcium carbonate storage bin are connected through a feed pipe;

[0010] A power transmission device is connected to one side of the twin-screw pusher, and the power transmission device is used to drive the twin-screw pusher to work. The power transmission device consists of a transmission housing, a gear transmission installed in the transmission housing, and a power motor linked to the gear transmission;

[0011] The twin-screw pusher is provided with a thermocouple heater outside for heating, and the twin-screw pusher is provided with a wrapped heat distribution channel;

[0012] A twin-screw pusher is disposed on one side of the feed casing, and a plurality of auxiliary material hoppers are connected to the side of the twin-screw pusher, and the auxiliary material hoppers are filled with auxiliary materials;

[0013] The types of auxiliary materials include but are not limited to polypropylene, lubricants, dispersants and colorants;

[0014] Several auxiliary material inlet pipes connected to the twin-screw pusher are arranged at the bottom of the auxiliary material hoppers, several agitators are arranged at the positions of the twin-screw pusher corresponding to the auxiliary material inlet pipes, and several auxiliary feeding screws are installed in the auxiliary material inlet pipes;

[0015] The wrapped heat distribution channel is connected with a heat exchange device wrapped outside the feed pipe, the feed pipe is arranged on the twin-screw pusher and arranged parallel to the extrusion direction, the heat exchange device heats the calcium carbonate powder passing through the feed pipe, and the heat exchange device draws heat from one side of the thermocouple heater;

[0016] The filling hopper is provided with a separation and feeding device, which includes a feeding control casing, which is installed on the top of the filling hopper, a negative pressure vacuum pump group is connected to one side of the feeding control casing, and a powder isolation structure is provided on the feeding control casing.

[0017] A material discharge control plug plate is arranged at the bottom of the filling hopper, and the material discharge control plug plate controls a switch through a cylinder. A weighing sensor is arranged between the bottom of the filling hopper and the feed port. A vacuum feed port connected to the feed pipe is arranged near the top of the filling hopper.

[0018] The filling hopper is used as a buffer hopper for discharging calcium carbonate powder. The ratio of the calcium carbonate powder, polypropylene, lubricant, dispersant and colorant is set to 75%: 20%: 4.9%: 0.009%: 0.001% by mass.

[0019] The twin-screw pusher is composed of a screw support mounted on a power transmission device, a feeding channel mounted on the screw support, at least one pair of feeding screws arranged in the feeding channel, and an extrusion die connected to the end of the feeding channel;

[0020] The number of the thermocouple heaters is at least 5, and the thermocouple heaters are arranged in a linear array and wrapped outside the feeding channel. A pair of feeding screws are connected to the power transmission device and a plurality of agitators are arranged at intervals corresponding to the positions of a plurality of auxiliary material inlet pipes.

[0021] The wrapped heat-distributing channel includes a buckle cover, which is mounted on the screw bracket and wrapped around the outside of the heat exchange device. The buckle cover is provided with at least one hanging ring, and the buckle cover is made of heat-insulating material. Two pairs of locking and limiting components are provided at both ends of the buckle cover to lock the buckle cover on the screw bracket;

[0022] The locking limit assembly includes a locking hole, a positioning hole is opened at the outer corner of the buckle cover, a locking hole is opened on the screw bracket corresponding to the positioning hole, a locking rod is inserted in the locking hole, a guide locking groove is set at the bottom of the locking hole, a guide block is set at the bottom of the locking rod to match the guide locking groove, a hand-operated knob is connected to the top of the locking rod, and a rubber buffer block is set on the locking rod at the bottom of the hand-operated knob to contact the top surface of the buckle cover.

[0023] The heat exchange device is installed based on the screw bracket, and the screw bracket is provided with a semicircular mounting groove, and the mounting groove is equipped with a lower heat exchange plate with a semi-annular structure, and the upper heat exchange plate is buckled on the lower heat exchange plate, and the upper heat exchange plate and the lower heat exchange plate are together surrounded by a tubular body, and the feed pipe passes between the upper heat exchange plate and the lower heat exchange plate;

[0024] The inner rings of the upper and lower heat exchange plates are arranged in a linear array with a plurality of heat exchange contact grooves, and the feed pipe is provided with a plurality of enhanced heat exchange rings corresponding to the plurality of heat exchange contact grooves.

[0025] The feeding control casing is a casing with a partial conical structure. An assembly groove is provided on the top of the feeding control casing. The assembly groove is used to fix the powder isolation structure. The powder isolation structure is connected to the negative pressure vacuum pump group. A connecting edge extends from the bottom of the feeding control casing, and the connecting edge is connected to the top portion of the filling hopper.

[0026] The negative pressure vacuum pump group consists of a vacuum pump, a negative pressure pipeline connected to the vacuum pump, a control valve installed on the negative pressure pipeline, and a control box installed on one side of the vacuum pump.

[0027] The powder isolation structure comprises a separation filter element, a centrifugal separator is arranged on the separation filter element, and a pulse backflush component is also arranged on the separation filter element;

[0028] The separation filter element is composed of a double-layer mesh cylinder with a partially conical structure, and a conical protective cover matching the conical slope of the separation filter element is provided at the bottom of the feed control housing;

[0029] The centrifugal separator comprises a rotating seat installed on the top of the separation filter element, a rotating tube connected to the rotating seat, a rotating shaft is provided on the rotating tube, the rotating shaft is connected to the end of the negative pressure pipeline, a gear set is sleeved on the outside of the rotating tube, and a control motor is provided on the upper part of the feeding control housing, and the control motor is connected to the gear set;

[0030] The pulse back-blowing assembly is composed of a high-pressure pulse gas cylinder installed on one side of a feed control housing, a back-blowing pipe connected to the high-pressure pulse gas cylinder, and a solenoid valve installed on the back-blowing pipe.

[0031] A production process for woven bag masterbatch, comprising the following steps: material preparation, weighing and feeding, mixing, extrusion, cooling and pelletizing;

[0032] Material preparation: prepare filler, polypropylene, lubricant, dispersant and colorant. The filler is calcium carbonate powder. The ratio of filler, polypropylene, lubricant, dispersant and colorant is 75%: 20%: 4.9%: 0.009%: 0.001%;

[0033] Weighing and feeding: filler, polypropylene, lubricant, dispersant and colorant are weighed and fed according to the above proportions. The filling hopper is used as a buffer hopper for feeding the filler. During the feeding process, the heat exchange structure is used to heat the filler using the excess heat generated by the thermocouple heating process to remove water vapor in the filler.

[0034] Mixing: The twin-screw pusher is used as the main body to mix the woven bag masterbatch. The mixing temperature is set at 270℃-280℃, and the speed of the mixing screw is set at 200-260 rpm;

[0035] Extrusion: Connect an extrusion die to the end of the twin-screw pusher, and use the traction roller and the twin-screw pusher to extrude the mixed material from one side of the extrusion die;

[0036] Cooling: Cool the extruded masterbatch by immersion cooling, and the cooling temperature is set between 50℃-70℃;

[0037] Pelletizing: The cooled masterbatch passes through a pelletizer, and the pelletizing rate of the pelletizer is set according to the pelletizing requirements to complete the pelletizing.

[0038] Beneficial Effects

[0039] The present invention provides a woven bag masterbatch production process and production equipment. It has the following beneficial effects: the woven bag masterbatch is produced by filling granulation, a large amount of calcium carbonate is used as filler in the masterbatch raw material, the smoothness and hardness of the woven bag masterbatch are improved, and a special production equipment is set to match the application of calcium carbonate powder, which has the following specific advantages:

[0040] 1. A filling hopper with a buffering and weighing function is arranged between the calcium carbonate storage bin and the feed casing of the extruder. A separation feeding device is arranged on the filling hopper, which has both metering and buffering effects. The separation filter element is a double-layer structure, which effectively improves the filterability and protects the vacuum pump from sucking in powder during operation. The structure is simple and the integration is high;

[0041] 2. It adopts twin-screw extrusion, with stable extrusion effect. The auxiliary materials are adjusted through the auxiliary bucket laterally connected to one side of the twin-screw extruder, which is easy to control and convenient for midway feeding and control switch;

[0042] 3. When using a negative pressure vacuum pump group for vacuum feeding, a centrifugal separator and a back-blowing component are installed on the separation filter element. The attached powder is thrown out through centrifugal separation by the centrifugal separator to avoid problems such as blockage. The back-blowing component is used to further improve the cleaning effect of the separation filter element, reduce the number of equipment maintenance, and make it more suitable for large-scale powder feeding;

[0043] 4. When the feed pipe conveys the powder to the filling hopper, the heat exchange device is used to heat the powder, so that the moisture in the powder evaporates during the conveying process and is discharged with the negative pressure of the vacuum device, thereby making the powder feeding continuity better and avoiding the agglomeration problem caused by moisture, affecting the stability of feeding and causing additional burden on the operation of the screw;

[0044] 5. The heat exchange device directly draws heat from one side of the thermocouple heater, effectively utilizes the heat overflow generated during the thermocouple heating process, and then wraps it with a wrapped heat distribution channel on the outside to avoid heat loss. It also has protection and installation functions, saves energy and reduces emissions while having a simple structure and is easy to inspect and maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 This is a first stereoscopic structural schematic diagram of a woven bag masterbatch production process and production equipment described in the present invention.

[0046] Figure 2 This is a second stereoscopic structural schematic diagram of a woven bag masterbatch production process and production equipment described in the present invention.

[0047] Figure 3 The present invention provides a schematic top view of the structure of a woven bag masterbatch production process and production equipment.

[0048] Figure 4 This is a third stereoscopic structural schematic diagram of a woven bag masterbatch production process and production equipment described in the present invention.

[0049] Figure 5 The present invention provides a schematic diagram of a partially sectional three-dimensional structure of a woven bag masterbatch production process and a production device.

[0050] Figure 6 It is a partial explosion three-dimensional structural schematic diagram of a woven bag masterbatch production process and production equipment described in the present invention.

[0051] Figure 7 The present invention provides a partial cross-sectional structural schematic diagram of a woven bag masterbatch production process and production equipment.

[0052] Figure 8 The present invention provides a schematic diagram of a partial top view of the structure of a woven bag masterbatch production process and production equipment.

[0053] Fig. 9 The present invention provides a schematic diagram of a side cross-sectional structure of a woven bag masterbatch production process and a production device.

[0054] Fig.10 It is a partial three-dimensional structural schematic diagram of a woven bag masterbatch production process and production equipment described in the present invention.

[0055] Fig.11 The present invention provides a schematic diagram of the structure of a separation and loading device for a woven bag masterbatch production process and production equipment.

[0056] Fig.12 This is a schematic diagram of the structure of a pulse back-blowing component of a woven bag masterbatch production process and production equipment described in the present invention.

[0057] In the figure: 1. Feed casing; 2. Filling hopper; 3. Calcium carbonate storage bin; 4. Twin-screw pusher; 5. Power transmission device; 6. Auxiliary hopper; 7. Feed pipe; 8. Separation feeding device; 21. Unloading control plug plate; 22. Cylinder; 23. Weighing sensor; 24. Vacuum feeding port; 41. Thermocouple heater; 42. Wrapped heat distribution channel; 43. Heat exchange device; 44. Screw bracket; 45. Feed screw; 46. Extrusion die; 47. Agitator; 51. Transmission casing; 52. Gear transmission; 53. Power motor; 61. Auxiliary material inlet pipe; 62. Auxiliary feeding screw; 63. Auxiliary motor; 81. Feed control casing; 82. Negative pressure vacuum pump group; 83. Centrifugal separator; 84. Pulse backflush assembly; 85. Separation filter element ;421, buckle cover;422, lifting ring;423, locking limit assembly;4231, locking hole;4232, locking rod;4233, guide locking groove;4234, guide block;4235, manual knob;4236, rubber buffer block;431, installation groove;432, lower heat exchanger;433, upper heat exchanger;434, reinforced heat exchange ring;811, vacuum exhaust port;812, connecting edge;813, conical protective cover;821, vacuum pump;822, negative pressure pipeline;823, control valve;824, control box;831, rotating seat;832, rotating pipe;833, rotating axis;834, gear set;835, control motor;841, high pressure pulse gas cylinder;842, backflush pipe;843, solenoid valve. DETAILED DESCRIPTION

[0058] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0059] See also Figure 1-12 The present invention provides an implementation scheme: in the production process of woven bag masterbatch, filler masterbatch particles are a common raw material, and calcium carbonate is mainly used as the raw material in the filler particles. Therefore, in the modern production process of calcium carbonate woven bag masterbatch, there are mainly the following problems. First, calcium carbonate is mostly powder, so it is easy to adhere to the wall and clog the filter element during the feeding process. Secondly, during the transportation and storage of calcium carbonate powder, problems such as moisture and agglomeration will occur, which will cause wear on the extrusion screw and material adhesion causing extrusion instability.

[0060] Embodiment 1: According to the specification sheet Figure 1-4It can be seen that in response to the above problems, the present application discloses a production equipment for woven bag masterbatch, which is used for extruding woven bag masterbatch. Specifically, a feed casing 1 is used as the main body support of the equipment, and a feed port is provided on the feed casing 1, and a filling hopper 2 is correspondingly provided on the feed port. The filling hopper 2 is a cavity shell with a rectangular structure. The filling hopper 2 serves as a buffer hopper and is used as a transfer bin for powder materials, which plays a role of containing and limiting. Furthermore, a calcium carbonate storage bin 3 is provided on one side of the filling hopper 2. The filling hopper 2 and the calcium carbonate storage bin 3 are connected by a feed pipe 7. The calcium carbonate storage bin 3 is used to store calcium carbonate powder, and the calcium carbonate powder is then passed into the filling hopper 2 through the feed pipe 7 for buffering and weighing;

[0061] Furthermore, a twin-screw pusher 4 is provided on one side of the feed casing 1;

[0062] A power transmission device 5 is connected to one side of the twin-screw pusher 4. The power transmission device 5 is used to drive the twin-screw pusher to work. The power transmission device 5 consists of a transmission housing 51, a gear transmission device 52 installed in the transmission housing 51, and a power motor 53 linked to the gear transmission device 52. The power transmission device 5 is connected to the twin-screw pusher with the power housing, and the power motor 53 drives the gear transmission device 52 to rotate, so that the gear transmission device 52 drives the twin-screw pusher to work, and then the twin-screw pusher is connected to the feed housing 1, and the feed housing 1 is connected to the filling hopper 2, so that the powder entering the filling hopper 2 falls into the twin-screw pusher through the feed housing 1;

[0063] Furthermore, a thermocouple heater 41 is provided outside the twin-screw pusher 4 for heating, and a wrapped heat distribution channel 42 is provided on the twin-screw pusher 4; a heat exchange device 43 is connected to the wrapped heat distribution channel 42 and wrapped outside the feed pipe 7, and the feed pipe 7 is arranged on the twin-screw pusher 4 and parallel to the extrusion direction, and the heat exchange device 43 heats the calcium carbonate powder passing through the feed pipe 7, and the heat exchange device 43 draws heat from one side of the thermocouple heater 41;

[0064] In the specific implementation process, the heat exchange device 43 is protected and wrapped by the wrapped heat distribution channel 42. When the thermocouple heater 41 heats the twin-screw pusher, it draws heat from one side of the thermocouple heat exchanger through the heat exchange device 43, so that the heat exchange device 43 transfers the heat to the feed pipe 7. The calcium carbonate powder passing through the feed pipe 7 evaporates the internal moisture through the heat exchange of the heat exchange device 43, thereby avoiding the problem of the powder getting damp or agglomerating.

[0065] In order to cooperate with the use of inorganic fillers, a plurality of auxiliary material hoppers 6 are connected to the side of the twin-screw pusher 4, and the auxiliary material hoppers 6 are filled with auxiliary materials. The bottom of the auxiliary material hoppers 6 is provided with a plurality of auxiliary material inlet pipes 61 connected to the twin-screw pusher 4, and the positions of the twin-screw pusher 4 corresponding to the plurality of auxiliary material inlet pipes 61 are provided with a plurality of stirrers 47, and the plurality of auxiliary material inlet pipes 61 are equipped with a plurality of auxiliary feeding screws 62, and the ends of the auxiliary feeding screws 62 are connected to the auxiliary motor 63;

[0066] In the specific implementation process, the auxiliary material is contained in the auxiliary bucket, and then the auxiliary motor 63 drives the auxiliary feeding screw 62 to rotate, so that the auxiliary material in the auxiliary bucket is passed into the twin-screw pusher 4 through the auxiliary material inlet pipe 61. The twin-screw pusher 4 is provided with an agitator 47 for fully mixing the auxiliary material and the filler.

[0067] Furthermore, the types of the above-mentioned auxiliary materials include but are not limited to polypropylene, lubricants, dispersants and colorants;

[0068] In order to solve the problem of dust adhering to the wall and clogging the mesh during vacuum feeding, a separation feeding device 8 is provided on the filling hopper 2. The separation feeding device 8 includes a feeding control housing 81, which is installed on the top of the filling hopper 2. A negative pressure vacuum pump group 82 is connected to one side of the feeding control housing 81, and a powder isolation structure is provided on the feeding control housing 81.

[0069] In the specific implementation process, the calcium carbonate powder entering the filling hopper 2 is separated by the separation and feeding device 8. The specific separation and feeding device 8 is connected to the filling hopper 2 with a feeding control housing 81, and is powered by a negative pressure vacuum pump group 82. The negative pressure generated by the negative pressure vacuum pump group 82 allows the material in the calcium carbonate storage bin 3 to enter the filling hopper 2 along the feeding pipe 7 under the action of vacuum, thereby completing the feeding of the filler by controlling the switch of the filling hopper 2, and a powder isolation structure is provided on the feeding control housing 81.

[0070] A material discharge control plug plate 21 is provided at the bottom of the filling hopper 2. The material discharge control plug plate 21 controls the switch through the cylinder 22, so as to close the bottom of the filling hopper 2. A vacuum loading port 24 is provided near the upper part of the filling hopper 2 and is connected to the feeding pipe 7. The vacuum loading port 24 is used to connect the feeding pipe 7 and the feeding channel. Furthermore, a weighing sensor 23 is also provided between the bottom of the filling hopper 2 and the feeding port. The filling hopper 2 is closed by the material discharge control plug plate 21. After the material enters the filling hopper 2, the filling hopper 2 is weighed by the weighing sensor 23. After the filling hopper 2 is weighed, the material discharge control plug plate 21 is opened and poured into the feeding machine casing 1 to feed the twin-screw pusher 4.

[0071] The filling hopper 2 is used as a buffer hopper for the discharge of calcium carbonate powder. The mass fraction of calcium carbonate powder, polypropylene, lubricant, dispersant and colorant is set to 75%: 20%: 4.9%: 0.009%: 0.001%. By increasing the proportion of calcium carbonate powder, the strength and smoothness of the masterbatch particles are improved.

[0072] According to the instruction manual Figure 1 -Attached Figure 5 It can be seen that the above-mentioned twin-screw pusher 4 is composed of a screw support 44 installed on the power transmission device 5, a feeding channel installed on the screw support 44, at least one pair of feeding screws 45 arranged in the feeding channel, and an extrusion die head 46 connected to the end of the feeding channel;

[0073] The number of thermocouple heaters 41 is at least 5, and the thermocouple heaters 41 are arranged in a linear array and wrapped outside the feeding channel. A pair of feeding screws 45 are connected to the power transmission device 5 and a plurality of agitators 47 are arranged at intervals corresponding to the positions of the plurality of auxiliary material inlet pipes 61;

[0074] In the specific implementation process, the screw bracket 44 is used as the supporting body for heating extrusion, and the feeding channel is used as the installation space for a pair of feeding screws 45, and the feeding channel is connected to the feeding machine housing 1. At the same time, the ends of several auxiliary material inlet pipes 61 are connected to the side of the feeding channel, and then the feeding machine housing 1 is used to inject calcium carbonate filler into the feeding channel. A stirrer 47 is provided at the position corresponding to the auxiliary inlet pipe, and the stirrer 47 can be used to mix and stir the materials.

[0075] Furthermore, according to the instructions attached Figure 6 -Attached Figure 7 It can be seen that the wrapped heat distribution channel 42 includes a buckle cover 421, which is mounted on the screw bracket 44 and wrapped around the outside of the heat exchange device 43. The buckle cover 421 is provided with at least one hanging ring 422. The buckle cover 421 is made of heat insulating material. Two pairs of locking limit assemblies 423 are provided at both ends of the buckle cover 421 to lock the buckle cover 421 on the screw bracket 44.

[0076] In the specific implementation process, the buckle cover 421 is fixed to the screw bracket 44 by the locking limit assembly 423, and the heat exchange device 43 is fixed by the buckle cover 421. The buckle cover 421 is a heat insulating material, which can prevent heat loss of the heat exchange device 43. The buckle cover 421 is also provided with a lifting ring 422. The lifting ring 422 can be used to inspect and replace the heat exchange device 43 in the buckle cover 421, thereby improving the inspection efficiency and convenience of the equipment.

[0077] According to the instruction manual Figure 7It can be known that the locking limit assembly 423 comprises a locking hole 4231, a positioning hole is provided at the outer corner of the buckle cover 421, a locking hole 4231 is provided on the screw bracket 44 corresponding to the positioning hole, a locking rod 4232 is inserted in the locking hole 4231, a guide locking groove 4233 is provided at the bottom of the locking hole 4231, a guide block 4234 is provided at the bottom of the locking rod 4232 to match the guide locking groove 4233, a manual knob 4235 is connected to the top of the locking rod 4232, and a rubber buffer block 4236 is provided on the locking rod 4232 at the bottom of the manual knob 4235 to contact the top surface of the buckle cover 421;

[0078] In the specific implementation process, the positioning hole is opened at the corner of the buckle cover 421, and the corresponding position of the screw bracket 44 is provided with a locking hole 4231, and the locking rod 4232 is inserted from the positioning hole into the locking hole 4231, so that the locking hole 4231 moves along the guide locking groove 4233. After moving to the end of the guide locking groove 4233, the locking rod 4232 is rotated to limit the locking block on the locking rod 4232 with the end of the guide locking groove 4233, and then the hand-operated knob 4235 can be used to facilitate the operation of the locking rod 4232. At the same time, when the locking rod 4232 is inserted to the bottom, the buckle cover 421 is limited by squeezing the rubber buffer block 4236 to ensure that the buckle cover 421 is pressed downward, so that the buckle cover 421 is tightly attached to the screw bracket 44.

[0079] Furthermore, according to the instructions attached Figure 5 -Attached Figure 7 It can be seen that the heat exchange device 43 is installed based on the screw bracket 44, and a semicircular mounting groove 431 is opened on the screw bracket 44, and a lower heat exchange plate 432 of a semi-annular structure is installed on the mounting groove 431, and an upper heat exchange plate 433 is buckled on the lower heat exchange plate 432, and the upper heat exchange plate 433 and the lower heat exchange plate 432 together enclose a tubular body, and the feed pipe 7 passes between the upper heat exchange plate 433 and the lower heat exchange plate 432;

[0080] In the specific implementation process, the mounting groove 431 on the screw bracket 44 matches the shape of the lower heat exchange plate 432, and the buckle cover 421 matches the upper heat exchange plate 433. Through the downward pressure of the buckle cover 421, the upper heat exchange plate 433 and the lower heat exchange plate 432 are pressed together into a complete cylindrical structure, so that the upper heat exchange plate 433 and the lower heat exchange plate 432 wrap the feed pipe 7, and the upper heat exchange plate 433 and the inner ring of the lower heat exchange plate 432 are arranged in a linear array with a plurality of heat exchange contact grooves, and a plurality of reinforcing heat exchange rings 434 are provided on the feed pipe 7 corresponding to the plurality of heat exchange contact grooves. By strengthening the contact between the heat exchange ring 434 and the heat exchange contact groove, the heat exchange area is increased. When the powder passes through the upper heat exchange plate 433 and the lower heat exchange plate 432 from the feed pipe 7, the powder is heated, so that the moisture in the powder is separated in advance, and then when entering the filling hopper 2, the water vapor is extracted by the negative pressure vacuum pump group 82.

[0081] According to the instruction manual Figure 8 -Attached Fig. 9 It can be seen that the feeding control housing 81 is a housing with a partially conical structure. A mounting groove is provided on the top of the feeding control housing 81. The mounting groove is used to fix the powder isolation structure. The powder isolation structure is connected to the negative pressure vacuum pump group 82. A connecting edge 812 extends from the bottom of the feeding control housing 81. The connecting edge 812 is connected to the top of the filling hopper 2.

[0082] During the specific implementation process, the feeding control casing 81 adopts a partial conical structure, and the powder isolation structure is fixed by an assembly groove. The powder isolation structure is connected to the negative pressure vacuum pump group 82. The negative pressure suction force generated by the negative pressure vacuum pump group 82 is transmitted to the feeding control casing 81 through the pipeline, and then the feeding control casing is connected to the filling hopper 2. At the same time, since the feeding control casing 81 is separately connected to the filling hopper 2, the feeding control casing 81 can be quickly disassembled for maintenance and use.

[0083] According to the instruction manual Figure 1 -Attached Figure 4 It can be known that the above-mentioned negative pressure vacuum pump group 82 is composed of a vacuum pump 821, a negative pressure pipeline 822 connected to the vacuum pump 821, a control valve 823 installed on the negative pressure pipeline 822, and a control box 824 installed on one side of the vacuum pump 821. In the specific implementation process, the vacuum pump 821 is used as a power device, connected to the vacuum exhaust port 811 through the negative pressure pipeline 822 to extract air from the filling hopper 2, and the control valve 823 is used to control the switch of the negative pressure pipeline 822. After the loading is completed, the control valve 823 should be closed to avoid the escape of powder. The control box 824 is used to electrically control the vacuum pump 821.

[0084] According to the instruction manual Fig.10 -Attached Fig.12It can be seen that the above-mentioned powder isolation structure includes a separation filter element 85, on which a centrifugal separator 83 is arranged, and on which a pulse back-blowing component 84 is also arranged; the powder is filtered and isolated by the separation filter element 85 to prevent the powder from entering the negative pressure pipeline 822 side. When the separation filter element 85 is fed with material, it is necessary to process the separation filter element 85 due to the effect of separating the powder. Therefore, a centrifugal separator 83 is arranged to centrifugally separate the separation filter element 85, so that the dust is thrown off by centrifugal force, and at the same time, the pulse back-blowing component 84 is cooperated to achieve the back-blowing effect, and the powder is further blown out and discharged to prevent it from hanging on the wall and adhering to the separation filter element 85.

[0085] According to the instruction manual Fig.10 It can be seen that the separation filter element 85 is composed of a double-layer mesh cylinder with a partially conical structure, and a conical protective cover 813 matching the conical slope of the separation filter element 85 is provided at the bottom of the feed control housing 81;

[0086] During the specific implementation process, the upper part of the separation filter element 85 can be limited by the conical protective cover, and the top of the outer layer can be closed at the same time to prevent the powder from further entering the upper space of the conical protective cover, while stabilizing the separation filter element 85. The separation filter element 85 adopts a double-layer mesh cylinder to improve the separation accuracy of the separation filter element 85.

[0087] According to the instruction manual Fig.11 It can be seen that the centrifugal separator 83 includes a rotating seat 831 installed on the top of the separation filter element 85, a rotating tube 832 connected to the rotating seat 831, a rotating shaft 833 is provided on the rotating tube 832, the rotating shaft 833 is connected to the end of the negative pressure pipeline 822, a gear set 834 is sleeved on the outside of the rotating tube 832, and a control motor 835 is provided on the upper part of the feeding control housing 81, and the control motor 835 is connected to the gear set 834;

[0088] In the specific implementation process, the rotating seat 831 is used to pull the rotating filter element, and then the rotating tube 832 is set on the rotating seat 831 to connect the gear set 834, and the rotating shaft 833 is inserted into the rotating tube 832, so that the rotating tube 832 limits the rotating shaft. During centrifugal separation, the electric drive gear set 834 is controlled to rotate, so that the gear set 834 is linked to the rotating tube 832 to rotate, and then the rotating tube 832 drives the separation filter element 85 to rotate, completing centrifugal separation and shaking off the powder on the filter element;

[0089] According to the instruction manual Fig.12 It can be seen that the pulse backflush assembly 84 is composed of a high-pressure pulse gas cylinder 841 installed on one side of the feed control housing 81, a backflush pipe 842 connected to the high-pressure pulse gas cylinder 841, and a solenoid valve 843 installed on the backflush pipe 842;

[0090] In the specific implementation process, the high-pressure backblowing gas is stored in the high-pressure pulse gas cylinder 841, and then the backblowing pipe 842 is used to connect the high-pressure pulse gas cylinder 841 and the rotating axis 833. The rotating axis 833 is also connected to the negative pressure pipeline 822. The two stabilize the rotating axis 833. When the rotating tube 832 rotates, the rotating axis 833 remains stationary. During backblowing, the solenoid valve 843 is controlled to switch intermittently, thereby achieving the effect of pulse backblowing.

[0091] Example 2: In order to match the use of the above-mentioned equipment, the present application also discloses a production process of a woven bag masterbatch, comprising the following steps: material preparation, weighing and feeding, mixing, extrusion, cooling and pelletizing;

[0092] Material preparation: prepare filler, polypropylene, lubricant, dispersant and colorant. The filler is calcium carbonate powder. The ratio of filler, polypropylene, lubricant, dispersant and colorant is 75%: 20%: 4.9%: 0.009%: 0.001%;

[0093] Weighing and feeding: filler, polypropylene, lubricant, dispersant and colorant are weighed and fed according to the above proportions. The filling hopper is used as a buffer hopper for feeding the filler. During the feeding process, the heat exchange structure is used to heat the filler using the excess heat generated by the thermocouple heating process to remove water vapor in the filler.

[0094] Mixing: The twin-screw pusher is used as the main body to mix the woven bag masterbatch. The mixing temperature is set at 270℃-280℃, and the speed of the mixing screw is set at 200-260 rpm;

[0095] Extrusion: Connect an extrusion die to the end of the twin-screw pusher, and use the traction roller and the twin-screw pusher to extrude the mixed material from one side of the extrusion die;

[0096] Cooling: Cool the extruded masterbatch by immersion cooling, and the cooling temperature is set between 50℃-70℃;

[0097] Pelletizing: The cooled masterbatch passes through a pelletizer, and the pelletizing rate of the pelletizer is set according to the pelletizing requirements to complete the pelletizing.

[0098] Through the use of the above equipment, in the production process of woven bag masterbatch with a large proportion of fillers, in order to match the large-scale use of fillers, a negative pressure suction device is set on the filling hopper, and the material is fed through the negative pressure suction device. In order to avoid problems such as blockage caused by the feeding of powder materials, the maintenance interval is increased, and the continuous feeding capacity is improved. At the same time, a heat exchange device is used to fully heat the powder filler passing through, so as to avoid agglomeration of moisture and other factors that affect the continuity of feeding and the stability of the finished product, so as to meet the continuous and stable production of woven bag masterbatch.

[0099] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A production device for woven bag masterbatch, comprising a feed housing (1), wherein the feed housing (1) is provided with a feed port, a filling hopper (2) is provided corresponding to the feed port, and a calcium carbonate storage bin (3) is provided on one side of the filling hopper (2), characterized in that: The filling hopper (2) and the calcium carbonate storage bin (3) are connected via a feed pipe (7); A twin-screw pusher (4) is disposed on one side of the feed casing (1), and a plurality of auxiliary material hoppers (6) are connected to the side of the twin-screw pusher (4), wherein the auxiliary material hoppers (6) are filled with auxiliary materials; One side of the twin-screw pusher (4) is connected to a power transmission device (5), and the power transmission device (5) is used to drive the twin-screw pusher to work; The twin-screw pusher (4) is provided with a thermocouple heater (41) outside for heating, and the twin-screw pusher (4) is provided with a wrapped heat distribution channel (42); The types of auxiliary materials include but are not limited to polypropylene, lubricants, dispersants and colorants; A plurality of auxiliary material inlet pipes (61) connected to the twin-screw pusher (4) are arranged at the bottom of the plurality of auxiliary material hoppers (6); a plurality of agitators (47) are arranged at positions of the twin-screw pusher (4) corresponding to the plurality of auxiliary material inlet pipes (61); and a plurality of auxiliary material feeding screws (62) are installed in the plurality of auxiliary material inlet pipes (61); The wrapped heat distribution channel (42) is connected to a heat exchange device (43), the heat exchange device (43) is wrapped around the outside of the feed pipe (7), the feed pipe (7) is arranged on the twin-screw pusher (4) and is arranged parallel to the extrusion direction, the heat exchange device (43) heats the calcium carbonate powder passing through the feed pipe (7), and the heat exchange device (43) draws heat from one side of the thermocouple heater (41); The filling hopper (2) is provided with a separating and loading device (8), the separating and loading device (8) comprising a feeding control casing (81), the feeding control casing (81) being installed on the top of the filling hopper (2), a negative pressure vacuum pump group (82) being connected to one side of the feeding control casing (81), and a powder material isolation structure being provided on the feeding control casing (81).

2. The production equipment of woven bag masterbatch according to claim 1, characterized in that: A material discharge control plug plate (21) is provided at the bottom of the filling hopper (2), and the material discharge control plug plate (21) controls a switch via a cylinder (22). A weighing sensor (23) is provided between the bottom of the filling hopper (2) and the feed port. A vacuum feed port (24) is provided near the top of the filling hopper (2) and is connected to the feed pipe (7).

3. The production equipment of woven bag masterbatch according to claim 2, characterized in that: The filling hopper (2) is used as a buffer hopper for feeding calcium carbonate powder.

4. The production equipment of woven bag masterbatch according to claim 3 is characterized in that: The twin-screw pusher (4) is composed of a screw support (44) mounted on a power transmission device (5), a feeding channel mounted on the screw support (44), at least one pair of feeding screws (45) arranged in the feeding channel, and an extrusion die (46) connected to the end of the feeding channel; The number of the thermocouple heaters (41) is at least five, and the thermocouple heaters (41) are arranged in a linear array and wrapped outside the feeding channel. A pair of feeding screws (45) are connected to the power transmission device (5) and a plurality of stirrers (47) are arranged at intervals corresponding to the positions of the plurality of auxiliary material inlet pipes (61).

5. The production equipment of woven bag masterbatch according to claim 4, characterized in that: The wrapped heat distribution channel (42) comprises a buckle cover (421), the buckle cover (421) is mounted on the screw support (44) and wrapped around the outside of the heat exchange device (43), the buckle cover (421) is provided with at least one hanging ring (422), the buckle cover (421) is made of heat insulating material, and two pairs of locking limit assemblies (423) are provided at both ends of the buckle cover (421) to lock the buckle cover (421) on the screw support (44).

6. The production equipment of woven bag masterbatch according to claim 5, characterized in that: The heat exchange device (43) is installed based on the screw bracket (44). The screw bracket (44) is provided with a semicircular installation groove (431). The installation groove (431) is equipped with a lower heat exchange plate (432) with a semi-annular structure. The lower heat exchange plate (432) is buckled with an upper heat exchange plate (433). The upper heat exchange plate (433) and the lower heat exchange plate (432) together enclose a tubular body. The feed pipe (7) passes between the upper heat exchange plate (433) and the lower heat exchange plate (432).

7. The production equipment of woven bag masterbatch according to claim 2, characterized in that: The feeding control housing (81) is a housing with a partially conical structure. The top of the feeding control housing (81) is provided with an assembly groove, the assembly groove is used to fix a powder isolation structure, the powder isolation structure is connected to a negative pressure vacuum pump group (82), and a connecting edge (812) extends from the bottom of the feeding control housing (81), and the connecting edge (812) is connected to the top of the filling hopper (2).

8. The production equipment of woven bag masterbatch according to claim 3, characterized in that: The negative pressure vacuum pump assembly (82) is composed of a vacuum pump (821), a negative pressure pipeline (822) connected to the vacuum pump (821), a control valve (823) installed on the negative pressure pipeline (822), and a control box (824) installed on one side of the vacuum pump (821).

9. The production equipment of woven bag masterbatch according to claim 4, characterized in that: The powder isolation structure comprises a separation filter element (85), a centrifugal separator (83) is arranged on the separation filter element (85), and a pulse backflush assembly (84) is also arranged on the separation filter element (85).

10. A production process of woven bag masterbatch, using the production equipment of woven bag masterbatch according to any one of claims 1 to 9, characterized in that: The process includes the following steps: material preparation, weighing and feeding, mixing, extrusion, cooling and pelletizing; Material preparation: prepare filler, polypropylene, lubricant, dispersant and colorant. The filler is calcium carbonate powder. The ratio of filler, polypropylene, lubricant, dispersant and colorant is 75%: 20%: 4.9%: 0.009%: 0.001%; Weighing and feeding: filler, polypropylene, lubricant, dispersant and colorant are weighed and fed according to the above proportions. The filling hopper is used as a buffer hopper for feeding the filler. During the feeding process, the heat exchange structure is used to heat the filler using the excess heat generated by the thermocouple heating process to remove water vapor in the filler. Mixing: The twin-screw pusher is used as the main body to mix the woven bag masterbatch. The mixing temperature is set at 270℃-280℃, and the speed of the mixing screw is set at 200-260 rpm; Extrusion: Connect an extrusion die to the end of the twin-screw pusher, and use the traction roller and the twin-screw pusher to extrude the mixed material from one side of the extrusion die; Cooling: Cool the extruded masterbatch by immersion cooling, and the cooling temperature is set between 50℃-70℃; Pelletizing: The cooled masterbatch passes through a pelletizer, and the pelletizing rate of the pelletizer is set according to the pelletizing requirements to complete the pelletizing.

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