CN113083584B

CN113083584B - Forming system and forming process for packing belt

Info

Publication number: CN113083584B
Application number: CN202110366497.9A
Authority: CN
Inventors: 刘庭乐
Original assignee: Taizhou Huanli Packaging Co ltd
Current assignee: Taizhou Huanli Packaging Co ltd
Priority date: 2021-04-06
Filing date: 2021-04-06
Publication date: 2022-03-01
Anticipated expiration: 2041-04-06
Also published as: CN113083584A

Abstract

The invention discloses a forming system of a packing belt and a forming process thereof, which have the characteristics of high forming efficiency, good forming effect and environmental protection, and the key points of the technical scheme are that the forming system comprises a unreeling frame which is sequentially arranged and is used for placing a plurality of groups of bundled steel belts; the deburring machine is used for removing burrs on the steel belt; the cleaning machine is used for cleaning impurities on the steel belt; the heating device is used for drying the steel strip; the spraying device is used for spraying the plastic powder on the surface of the steel strip to form a plastic spraying layer; the high-temperature curing device is used for curing the plastic powder to form a packing belt; the cooling device is used for cooling the packing belt; the traction machine is used for drawing the packing belt; the control unit is used for controlling the operation of the unreeling frame, the deburring machine, the cleaning machine, the heating device, the spraying device, the high-temperature curing device, the cooling device and the tractor.

Description

Forming system and forming process for packing belt

Technical Field

The invention belongs to the technical field of production of packing belts, and particularly relates to a forming system and a forming process of a packing belt.

Background

The existing packing belt is suitable for different application environments, a steel-plastic composite belt has been developed in the market, but the traditional steel-plastic composite belt is usually formed by extruding plastic on the surface of a steel belt or dipping plastic in liquid in the forming process, and the steel-plastic composite belt has the defects of complex manufacturing process, higher production cost and poor environmental protection property, so that the existing spraying technology is improved in the direction of powder spraying, but the existing powder spraying process is often uneven in the spraying process, the dust utilization rate is low, the dust is easy to fly to cause environmental pollution and the like, and further improvement is needed.

Disclosure of Invention

The invention aims to provide a forming system and a forming process of a packing belt, and the forming system and the forming process have the characteristics of high forming efficiency, good forming effect and environmental friendliness.

The purpose of the invention is realized as follows: a molding system of a packing belt is characterized in that: comprises an unreeling frame, a deburring machine, a cleaning machine, a heating device, a spraying device, a high-temperature curing device, a cooling device, a tractor and a control unit which are arranged in sequence,

the unreeling frame is used for placing a plurality of groups of bundled steel belts;

the deburring machine is used for removing burrs on the steel belt;

the cleaning machine is used for cleaning impurities on the steel belt;

the heating device is used for drying the steel strip;

the spraying device is used for spraying the plastic powder on the surface of the steel strip to form a plastic spraying layer;

the high-temperature curing device is used for curing the plastic powder to form a packing belt;

the cooling device is used for cooling the packing belt;

the traction machine is used for drawing the packing belt;

the control unit is used for controlling the operation of the unreeling frame, the deburring machine, the cleaning machine, the heating device, the spraying device, the high-temperature curing device, the cooling device and the tractor.

The invention is further configured to: heating device is equipped with heating coil including the heating cabinet that can open and shut from top to bottom in the heating cabinet, is equipped with the insert that the symmetry set up on the both sides of heating cabinet, is equipped with the through-hole that supplies the steel band to pass on inserting, and the through-hole sets up with heating coil is coaxial, still is equipped with the caulking groove on the through-hole inner wall, is equipped with the graphite strip in the caulking groove, and heating coil is external to have electrical source controller, still is equipped with temperature sensor in the heating cabinet, and temperature sensor is used for detecting the temperature in the heating cabinet and feeds back to electrical source controller.

The invention is further configured to: the spraying device comprises a spraying cylinder, wherein a spraying cavity and a plurality of spray guns are arranged in the spraying cylinder, and the spray guns are annularly and equidistantly arranged on the periphery of the spraying cavity;

the spray gun comprises a first-stage mixing area and a second-stage mixing area which are communicated, the first-stage mixing area comprises an outer barrel, a first inner barrel and a second inner barrel, the first inner barrel and the outer barrel are sequentially sleeved from inside to outside, the outer barrel is used for inputting and recovering powder, the second inner barrel is used for inputting main powder, the first inner barrel is used for inputting auxiliary powder, the outlet end of the outer barrel is provided with a first necking channel, the outlet end of the first inner barrel is provided with a second necking channel, the outlet end of the second inner barrel is provided with a third necking channel, the second necking channel surrounds the outer side of the third necking channel, a premixing area is formed between the first necking channel and the second necking channel in the axial direction, the inlet end of the second-stage mixing area is provided with a feeding channel communicated with the first necking channel, the inlet end of the second-stage mixing area is also provided with an air pipe arranged around the feeding channel, the air pipe is connected with an air inlet pipe which is obliquely blown to the air pipe in the axial direction and is tangentially arranged with the air pipe, still be equipped with the injection passage on the exit end in second grade compounding district, be equipped with static generating device in the injection passage, still be equipped with the compounding chamber in the second grade compounding district, the compounding chamber is the toper structure, the tip and the tuber pipe intercommunication in compounding chamber, the main aspects and the injection passage intercommunication in compounding chamber, and the internal diameter of injection passage is less than the internal diameter of compounding chamber main aspects.

The invention is further configured to: still be equipped with the reposition of redundant personnel pole with the coaxial setting of tuber pipe in the injection passageway, static generating device includes high tension cable, install the current-limiting resistance in the reposition of redundant personnel pole and install in the discharge needle of reposition of redundant personnel pole tip, high tension cable, current-limiting resistance and discharge needle connect gradually, and high tension cable is outer along to the spray gun outside, the material of reposition of redundant personnel pole is insulating material, the outer end of injection passageway still is equipped with the flaring of toper structure, the inner of reposition of redundant personnel pole is equipped with the arc water conservancy diversion portion just right with the tuber pipe, and arc water conservancy diversion portion extends to the compounding intracavity, the outer end of reposition of redundant personnel pole is equipped with the toper water conservancy diversion portion that corresponds with the flaring, still be equipped with the installation pole of arranging the compounding intracavity in on the reposition of redundant personnel pole, the tip of installation pole is equipped with the just right direction impeller of third throat passageway.

The invention is further configured to: a negative pressure cavity is arranged between the peripheral wall of the spray cavity and the spray cylinder, a plurality of negative pressure holes communicated with the negative pressure cavity are arranged on the spray cavity, a negative pressure pipe communicated with the negative pressure cavity is also arranged on the spray cylinder, the negative pressure holes and the negative pressure pipe are arranged in a staggered manner, the negative pressure pipe comprises a first pipe group and a second pipe group, the first pipe group comprises a first main pipe and a plurality of first auxiliary pipelines, the second pipe group comprises a second main pipe and a plurality of second auxiliary pipelines, a fourth necking channel is arranged at the center of the first main pipe, one end of the first auxiliary pipeline is communicated with the negative pressure cavity, the other end of the first auxiliary pipeline is radially communicated with the fourth necking channel, a fifth necking channel is arranged at the center of the second main pipe, one end of the second auxiliary pipeline is communicated with the negative pressure cavity, and the other end of the second auxiliary pipeline is radially communicated with the fifth necking channel, and the head end of first trunk line and the head end of second trunk line all are equipped with the filter bag, and the tail end of first trunk line and the tail end of second trunk line all are equipped with the collecting box.

The invention is further configured to: the spraying device further comprises a pneumatic control system, the pneumatic control system comprises a vacuum tank, a vacuum pumping pump, a high-pressure tank and an air pressure pump, the air pumping end of the vacuum pumping pump is communicated with the air outlet end of the vacuum tank, the air supply end of the air pressure pump is communicated with the air inlet end of the high-pressure tank, a first switch valve is arranged between the vacuum pumping pump and the vacuum tank, a second switch valve is arranged between the air pressure pump and the high-pressure tank, the air inlet end of the vacuum tank is communicated with the head end of a first main pipeline through a first electromagnetic valve, the air inlet end of the vacuum tank is communicated with the head end of a second main pipeline through a second electromagnetic valve, the air inlet end of the vacuum tank is communicated with the collecting box through a third electromagnetic valve, the air outlet end of the high-pressure tank is communicated with the first main pipeline through a fourth electromagnetic valve, and the air outlet end of the high-pressure tank is communicated with the second main pipeline through a fifth electromagnetic valve;

still be equipped with the first flow sensor who is used for detecting the inside gas flow of first trunk line on the head of first trunk line, be equipped with the second flow sensor who is used for detecting the inside gas flow of second trunk line on the head of second trunk line, all still be equipped with the control valve between the tail end of first trunk line and the collecting box and between the tail end of second trunk line and the collecting box.

The invention is further configured to: the tail end of the first main pipeline and the tail end of the second main pipeline are both provided with valve ports, the control valve comprises a valve core and an electromagnet for controlling the valve core to open and close, the valve core comprises a valve rod and a valve clack which are connected, the valve clack is matched with the valve ports, a guide ring sleeved on the valve rod is further arranged in the control valve, and the valve rod is provided with a return spring and an iron block; when the electromagnet is powered off, the valve clack rises to abut against the valve port to be closed under the action of the return spring, and when the electromagnet is powered on, the iron block is attracted to enable the valve clack to descend, so that the valve port is in an open state; still be equipped with first gravity sensor on the valve clack on the first trunk line, still be equipped with second gravity sensor on the valve clack on the second trunk line.

The invention is further configured to: the forming system further comprises a tension adjusting device, the tension adjusting device is located between the heating device and the spray-attaching device, the tension detecting device comprises an upper guiding device and a lower adjusting device, the upper guiding device comprises a front group and a rear group, the upper guiding device of each group comprises an upper guiding wheel which is respectively abutted against the upper surface of each steel strip, the lower adjusting device is located between the two groups of upper guiding devices, the lower adjusting device comprises a plurality of groups of electric cylinders and a lower guiding wheel which is arranged on the movable end of each electric cylinder, the lower guiding wheels are respectively abutted against the lower surface of each steel strip, the tension adjusting device further comprises a tension sensor, the tension sensor is used for detecting the tension of the steel strips and feeding back signals to the control unit, and the control unit controls the running state of each electric cylinder.

A forming process of a packing belt forming system is characterized in that: the method comprises the following steps:

firstly, placing a plurality of bundles of steel belts on an unreeling frame and dragging the steel belts by a tractor, and cleaning the surfaces of the steel belts by a deburring machine and a cleaning machine in the dragging process;

secondly, heating and drying the steel strip sequentially through a heating device in the traction process, spraying a plastic spraying layer on the surface of the steel strip through a spraying device, solidifying through a high-temperature solidifying device, and integrally cooling through a cooling device.

The invention is further configured to: the control unit also comprises a timing module and an alarm module, and the control unit also comprises the following control steps during spraying:

l1, before spraying, performing vacuum pumping treatment on the vacuum tank by using a vacuum pumping pump to enable the vacuum tank to be in a vacuum state, and performing pressure charging treatment on the high-pressure tank by using a vacuum pump to enable the high-pressure tank to be in a high-pressure state;

l2, starting each spray gun in the spray-attaching process;

l3, opening the first electromagnetic valve, and vacuumizing the negative pressure cavity by the first pipe group; simultaneously detecting by a first flow sensor and a first gravity sensor; when the flow detected by the first flow sensor is lower than the preset flow value and the pressure detected by the first gravity sensor is lower than the preset pressure value, the process goes to step L4; or when the pressure detected by the first gravity sensor is higher than the preset pressure value, the step L4 is also entered;

l4, a second electromagnetic valve is opened, the second pipe group realizes vacuumizing treatment on the negative pressure cavity, then the first electromagnetic valve is closed, a fourth electromagnetic valve is opened, a fifth electromagnetic valve is in a closed state, a control valve in the first main pipeline is in a power-on state, a control valve in the second main pipeline is in a power-off state, air is supplied to the first main pipeline through a high-pressure tank, and reverse dust removal is carried out on a filter bag in the first main pipeline; detecting by the second flow sensor and the second gravity sensor at the same time, and entering a step L5 when the flow detected by the second flow sensor is lower than a preset flow value and the pressure detected by the second gravity sensor is lower than a preset pressure value; or when the pressure detected by the gravity sensor is higher than the preset pressure value, the step L5 is also entered;

the L5, the second electromagnetic valve and the fourth electromagnetic valve are closed, and the control valve in the first main pipeline is in a power-off state; meanwhile, the fifth electromagnetic valve is opened, and the control valve in the second outlet pipeline is in an electrified state; and returns to step L3;

in step L4, after the first electromagnetic valve is closed, the timing module records a single opening time of the first electromagnetic valve, if the single opening time is greater than a preset time value, the single opening time is normal, and when the single opening time is less than or equal to the preset time value, the second negative pressure channel is abnormal, and an alarm is given through the alarm module;

in step L5, after the second electromagnetic valve is closed, the timing module records a single opening time of the second electromagnetic valve, if the single opening time is greater than a preset time value, the single opening time is normal, and when the single opening time is less than or equal to the preset time value, the first negative pressure channel is abnormal, and an alarm is given through the alarm module.

By adopting the technical scheme, the method has the following advantages:

the whole manufacturing equipment has simple process, and the forming system has reasonable design, high production efficiency, low production cost and convenient popularization and application;

by adopting the spray gun structure, the main powder and the auxiliary powder can be mixed in the spray process, the mixing uniformity is good, and the spray effect can be improved;

through the setting of two adsorption tube groups, can adsorb the recovery in turn to the powder at the spraying in-process, avoid blockking up the scheduling problem, and can realize automatic row stifled, the practicality is good.

Drawings

FIG. 1 is a schematic structural view of a molding system of the present invention;

FIG. 2 is a schematic view of the structure of a heating apparatus according to the present invention;

FIG. 3 is a schematic sectional view taken along line A-A of FIG. 2 according to the present invention;

FIG. 4 is a schematic radial cross-sectional view of the spray attachment apparatus of the present invention;

FIG. 5 is a schematic view of the structure of the lance of the present invention;

FIG. 6 is a schematic structural view of the first main pipe in the present invention;

FIG. 7 is a block diagram of the pneumatic control system of the present invention;

FIG. 8 is a control logic block diagram during spray application of the present invention.

The reference numbers in the figures are: 1. unwinding the frame; 2. a deburring machine; 3. a cleaning machine; 4. a heating device; 5. a spray attachment device; 6. a high temperature curing device; 7. a cooling device; 8. a tractor; 10. an outer cylinder; 11. a first inner cylinder; 12. a second inner cylinder; 13. a first throat channel; 14. a second throat channel; 15. a third throat channel; 16. a feed channel; 17. an air duct; 18. an air inlet pipe; 19. an injection channel; 20. a mixing chamber; 21. a diverter rod; 22. a high voltage cable; 23. a current limiting resistor; 24. a discharge needle; 25. a negative pressure chamber; 26. a negative pressure hole; 27. a first main pipe; 28. a first secondary conduit; 29. a second secondary conduit; 30. a fourth throat channel; 31. a filter bag; 32. a collection box; 33. a first flow sensor; 34. an electromagnet; 35. a valve stem; 36. a valve flap; 37. a return spring; 38. an iron block; 39. mounting a rod; 40. a guide impeller; 41. a heating box; 42. a heating coil; 43. an insert; 44. graphite strips; 50. spraying a cylinder; 51. a spray chamber; 52. a spray gun; 90. an upper guide device; 91. and a lower guide device.

Detailed Description

The invention is further described in the following with specific embodiments in conjunction with the accompanying drawings, see fig. 1-8:

a forming system of a packing belt comprises an unreeling frame 1, a deburring machine 2, a cleaning machine 3, a heating device 4, a spraying device 5, a high-temperature curing device 6, a cooling device 7, a tractor 8 and a control unit which are arranged in sequence,

the unreeling rack 1 is used for placing a plurality of groups of bundled steel strips;

the deburring machine 2 is used for removing burrs on the steel belt;

the cleaning machine 3 is used for cleaning impurities on the steel belt;

the heating device 4 is used for drying the steel strip;

the spraying device 5 is used for spraying the plastic powder on the surface of the steel strip to form a plastic spraying layer;

the high-temperature curing device 6 is used for curing the plastic powder to form a packing belt;

a cooling device 7 for cooling the packing belt;

the tractor 8 is used for dragging the packing belt;

the control unit is used for controlling the operation of the unreeling rack 1, the deburring machine 2, the cleaning machine 3, the heating device 4, the spraying device 5, the high-temperature curing device 6, the cooling device 7 and the tractor 8.

The unreeling frame 1, the deburring machine 2, the cleaning machine 3, the high-temperature curing device 6, the cooling device 7 and the tractor 8 can all adopt the existing equipment, the specific structure is not described in a tired way, the surface of the steel strip is cleaned, cleaned and dried before spraying, and the spraying effect in the spraying process is convenient to improve; wherein the control unit can be a microprocessor, a PLC, etc.

Heating device 4 is equipped with heating coil 42 including the heating cabinet 41 that can open and shut from top to bottom in the heating cabinet 41, be equipped with the insert 43 that the symmetry set up on the both sides of heating cabinet 41, be equipped with the through-hole that supplies the steel band to pass on the insert 43, the through-hole sets up with heating coil 42 is coaxial, still be equipped with the caulking groove on the through-hole inner wall, be equipped with graphite strip 44 in the caulking groove, heating coil 42 is external to have electrical source controller, still be equipped with temperature sensor in the heating cabinet 41, temperature sensor is used for detecting the temperature in the heating cabinet 41 and feeds back to electrical source controller.

The power controller is controlled by the control unit, through the embedded graphite strip 44 mode in the through-hole, can reduce the area of through-hole on the basis that guarantees the billet and pass through, reduces the interior thermal outer scattered of heating cabinet 41, can practice thrift the energy consumption, because graphite strip 44 has high temperature resistant and wear-resisting characteristic, is not fragile and is difficult for causing the damage to the billet.

The spraying equipment comprises a spraying cylinder 50, wherein a spraying cavity 51 and a plurality of spray guns 52 are arranged in the spraying cylinder 50, and the spray guns 52 are annularly and equidistantly arranged on the periphery of the spraying cavity 51;

the spray gun 52 comprises a first-stage mixing area and a second-stage mixing area which are communicated, the first-stage mixing area comprises an outer cylinder body 10, a first inner cylinder body 11 and a second inner cylinder body 12, the first inner cylinder body 11 and the outer cylinder body 10 are sequentially sleeved from inside to outside, the outer cylinder body 10 is used for inputting and recovering powder, the second inner cylinder body 12 is used for inputting main powder, the first inner cylinder body 11 is used for inputting auxiliary powder, a first necking channel 13 is arranged at the outlet end of the outer cylinder body 10, a second necking channel 14 is arranged at the outlet end of the first inner cylinder body 11, a third necking channel 15 is arranged at the outlet end of the second inner cylinder body 12, the second necking channel 14 surrounds the outer side of the third necking channel 15, a pre-mixing area is formed between the first necking channel 13 and the second necking channel 14 in the axial direction, a feeding channel 16 communicated with the first necking channel 13 is arranged at the inlet end of the second-stage mixing area, and an air pipe 17 arranged around the feeding channel 16 is further arranged at the inlet end of the second-stage mixing area, be connected with on the tuber pipe 17 that the axial slope blows to tuber pipe 17 and with the intake pipe 18 of tuber pipe 17 tangential setting, still be equipped with injection passage 19 on the exit end in second grade compounding district, be equipped with static generating device in the injection passage 19, still be equipped with mixing chamber 20 in the second grade compounding district, mixing chamber 20 is the toper structure, mixing chamber 20's tip and tuber pipe 17 intercommunication, mixing chamber 20's main aspects and injection passage 19 intercommunication, and injection passage 19's internal diameter is less than the internal diameter of mixing chamber 20 main aspects.

In use, the outer cylinder 10, the first inner cylinder 11 and the second inner cylinder 12 can be supplied by the existing powder jet pump, and by adopting the structure of the spray gun 52, main powder, auxiliary powder and recovered powder can be directly mixed, wherein the main powder can be polyethylene, polypropylene and other powder, the auxiliary powder can be pigment, filler, auxiliary agent and the like, specific components can be selected according to actual requirements, and the recovered powder refers to powder recovered in spray equipment and is used for secondary utilization; various kinds of powder can be directly mixed through the spray gun 52, accelerated airflow can be generated when powder airflow passes through the second necking passage 14 and the third necking passage 15, but mixed flow is easily generated at the first necking passage 13 and the second necking passage 14 to realize premixing because a plurality of airflows cannot simultaneously and completely pass through the first necking passage 13; the feeding channel 16 and the first necking channel 13 can be integrally arranged, and through the structural arrangement of the air inlet pipe 18, the air inlet pipe 18 can generate rotary airflow when air is fed, and the premixed airflow is disturbed by the rotary airflow to be more uniform; when the powder passes through the mixing cavity 20, the rotational flow can be continued, and the rotating airflow can play a further mixing and diluting role on the powder airflow along with the increase of the space, so that the mixing uniformity is improved, and the condition that high-concentration airflow powder directly blows a steel belt can be avoided; when the rotating airflow swirls in the mixing cavity, part of powder is sprayed out of the spraying channel 19 along with the airflow, and part of powder is blocked by the inner end surface of the spraying channel 19 to fall back, but rises again along with the rotating airflow, and is continuously mixed and disturbed in the swirling air chamber, so that the mixing uniformity is improved.

Still be equipped with the reposition of redundant personnel pole 21 with the coaxial setting of tuber pipe 17 in the injection passage 19, static generating device includes high tension cable 22, install current-limiting resistor 23 in reposition of redundant personnel pole 21 and install in the discharge needle 24 of reposition of redundant personnel pole 21 tip, high tension cable 22, current-limiting resistor 23 and discharge needle 24 connect gradually, and high tension cable 22 outer edge to spray gun 52 outside, the outer end of injection passage 19 still is equipped with the flaring of toper structure, the inner of reposition of redundant personnel pole 21 is equipped with the arc water conservancy diversion portion just right with tuber pipe 17, and the arc water conservancy diversion portion extends to in the mixing chamber 20, the outer end of reposition of redundant personnel pole 21 is equipped with the toper water conservancy diversion portion that corresponds with the flaring, still be equipped with the installation pole 39 of arranging in the mixing chamber 20 on the reposition of redundant personnel pole 21, the tip of installation pole 39 is equipped with the guide vane wheel 40 just right with third throat passageway 15.

The function of the flow dividing rod 21 is mainly that firstly, the powder airflow generated by the feeding channel 16 and the air pipe 17 is guided to the peripheral side along with the arc-shaped flow guiding part, so that the powder airflow generated by the feeding channel 16 is prevented from directly flowing to the injection channel 19, secondly, the cyclone airflow in the mixing area is guided, when the mixed powder cyclone radially impacts the flow dividing rod 21, the mixed powder cyclone is enabled to enter the injection channel 19, and thirdly, the flow dividing rod is used for installing the static electricity generating device; the high-voltage cable 22 is used for connecting an external control power supply, the current-limiting resistor 23 is used for preventing current overload generated in a discharge loop and improving safety, and the discharge needle 24 is used for enabling the sprayed powder to be charged with static electricity; the flaring at the pipe orifice of the injection channel 19 and the conical flow guide part of the flow dividing rod 21 are arranged, so that the injected powder airflow is further decompressed, and the powder layer sprayed on the surface layer of the steel strip is prevented from being damaged by direct blowing of the powder airflow; the mounting rod 39 is fixed on the flow dividing rod 21, the guide impeller 40 is rotatably mounted on the mounting rod 39, when the feeding channel 16 and the air pipe 17 blow air to the cyclone air chamber, the guide impeller 40 rotates, air flow is enabled to rotate and diffuse towards the peripheral side in the rotating process, powder in the air flow further moves and disperses in the radial direction and is mixed with rotating air flow in the cyclone air chamber, the mixing uniformity is improved, and the powder air flow in the feeding channel 16 can be further prevented from directly flowing to the injection channel 19.

A negative pressure cavity 25 is arranged between the peripheral wall of the spraying cavity 51 and the rotary drum, a plurality of negative pressure holes 26 communicated with the negative pressure cavity 25 are arranged on the spraying cavity 51, a negative pressure pipe communicated with the negative pressure cavity 25 is also arranged on the rotary drum, the negative pressure holes 26 and the negative pressure pipe are arranged in a staggered manner, the negative pressure pipe comprises a first pipe group and a second pipe group, the first pipe group comprises a first main pipe 27 and a plurality of first auxiliary pipelines 28, the second pipe group comprises a second main pipe and a plurality of second auxiliary pipelines 29, a fourth necking channel 30 is arranged at the center of the first main pipe 27, one end of the first auxiliary pipeline 28 is communicated with the negative pressure cavity 25, the other end of the first auxiliary pipeline 28 is radially communicated with the fourth necking channel 30, a fifth necking channel is arranged at the center of the second main pipe, one end of the second auxiliary pipeline 29 is communicated with the negative pressure cavity 25, the other end of the second auxiliary pipeline 29 is radially communicated with the fifth necking channel, and the head end of the first main pipe 27 and the head end of the second main pipe are both provided with a filter bag 31, the tail end of the first main pipe 27 and the tail end of the second main pipe are both provided with a collecting tank 32.

The negative pressure cavity 25 enables the periphery of the spraying cavity 51 to form negative pressure, and redundant powder in the spraying cavity 51 can enter the negative pressure cavity 25 through the negative pressure hole 26; the negative pressure hole 26 and the negative pressure pipe need to be arranged in a staggered manner, so that direct suction to the spraying cavity 51 caused by unstable suction force generated by the negative pressure pipe is avoided, and disturbance to air flow in the spraying cavity 51 can be reduced; the negative pressure pipe comprises two groups of pipe groups, so that alternate vacuum pumping can be realized, when the filter bag 31 in one of the pipe groups is difficult to be vacuumized again due to dust adsorption, the other pipe group is started to be vacuumized, the former pipe group is subjected to reverse blowing dust removal and dust collection through the collection box 32, and the collected dust can be reused for the second time; the first auxiliary pipelines 28 and the second auxiliary pipelines 29 can be respectively arranged alternately in turn along the annular direction, so that the stability of the airflow in the negative pressure cavity 25 is improved when any pipe group is used for suction; wherein, the two ends of the first auxiliary pipeline 28 and the second auxiliary pipeline 29 can be rigid pipeline joints, and the middle section can be connected by flexible pipelines; the filter bag 31 can be fixed at the head end of the first main pipe 27 and the head end of the second main pipe through a cylindrical fixing frame; when the first or second tube group is evacuated, the collection tank 32 is in a closed state; when the first pipe set or the second pipe set blows air, the collecting box 32 is in an open state, the structures of the first main pipe 27 and the second main pipe form a venturi effect, in the blowing process, the air flow is accelerated when passing through the fourth necking channel 30 or the fifth necking channel, the pressure of the air flow can be reduced, the possibility that the high-pressure air flow enters the negative pressure cavity 25 through the first sub-pipe 28 and the second sub-pipe 29 can be reduced, meanwhile, the collecting box 32 is also in a negative pressure state, and the possibility that the high-pressure air flow enters the negative pressure cavity 25 can be further reduced.

The spraying device 5 further comprises a pneumatic control system, the pneumatic control system comprises a vacuum tank, a vacuum pumping pump, a high-pressure tank and an air pressure pump, the air pumping end of the vacuum pumping pump is communicated with the air outlet end of the vacuum tank, the air supply end of the air pressure pump is communicated with the air inlet end of the high-pressure tank, a first switch valve is arranged between the vacuum pumping pump and the vacuum tank, a second switch valve is arranged between the air pressure pump and the high-pressure tank, the air inlet end of the vacuum tank is communicated with the head end of a first main pipeline 27 through a first electromagnetic valve, the air inlet end of the vacuum tank is communicated with the head end of a second main pipeline through a second electromagnetic valve, the air inlet end of the vacuum tank is communicated with a collecting box 32 through a third electromagnetic valve, the air outlet end of the high-pressure tank is communicated with the first main pipeline 27 through a fourth electromagnetic valve, and the air outlet end of the high-pressure tank is communicated with the second main pipeline through a fifth electromagnetic valve;

the vacuum pump carries out vacuum-pumping treatment on the vacuum tank, the vacuum tank is maintained between certain pressure values, the air pressure pump carries out air supply pressurization on the high-pressure tank, the high-pressure tank is maintained between certain pressure values, and the control of the control unit on the electromagnetic valve is used for realizing vacuum-pumping or air supply dust blowing.

Still be equipped with the first flow sensor 33 that is used for detecting the inside gas flow of first main pipeline 27 on the head of first main pipeline 27, be equipped with the second flow sensor that is used for detecting the inside gas flow of second main pipeline on the head of second main pipeline, all still be equipped with the control valve between the tail end of first main pipeline 27 and the collecting box 32 and between the tail end of second main pipeline and the collecting box 32.

The first flow sensor 33 and the second flow sensor are mainly used for detecting whether the filter bag 31 is blocked or not and feeding back signals to the control unit, and when the filter bag is blocked, the flow rate is naturally reduced; the control valves are used for controlling the communication between the first main pipe 27 and the collecting tank 32 and between the second main pipe and the collecting tank 32.

The tail end of the first main pipeline 27 and the tail end of the second main pipeline are both provided with valve ports, the control valve comprises a valve core and an electromagnet 34 for controlling the valve core to open and close, the valve core comprises a valve rod 35 and a valve clack 36 which are connected, the valve clack 36 is matched with the valve ports, a guide ring sleeved on the valve rod 35 is further arranged in the control valve, and the valve rod 35 is provided with a return spring 37 and an iron block 38; when the electromagnet 34 is powered off, the valve flap 36 is lifted to abut against the valve port for closing under the action of the return spring 37, and when the electromagnet 34 is powered on, the iron block 38 is attracted, so that the valve flap 36 is lowered, and the valve port is in an open state; the valve flap 36 on the first main pipe 27 is also provided with a first gravity sensor, and the valve flap 36 on the second main pipe is also provided with a second gravity sensor.

The guide ring and the iron block 38 can be fixed on the valve rod 35 in a snap spring or threaded connection mode, and the electromagnet 34 needs to be coated with an insulating glue layer for improving safety performance; the setting through above-mentioned structure can play the effect of effective control to opening and close of valve port, and controls opening and close of first trunk line 27 and second trunk line through the control unit, and first gravity sensor and second gravity sensor are used for detecting the weight that the powder is piled up on valve clack 36, and when weight exceeded the default, it has piled up to show the recovery powder in first trunk line 27 and the second trunk line, need carry out the deashing.

The forming system further comprises a tension adjusting device, the tension adjusting device is located between the heating device 4 and the spray-attaching device 5, the tension detecting device comprises an upper guiding device 90 and a lower adjusting device, the upper guiding device 90 comprises a front group and a rear group, the upper guiding device 90 in each group comprises an upper guiding wheel which is respectively abutted to the upper surface of each steel strip, the lower adjusting device is located between the two groups of upper guiding devices 90, the lower adjusting device comprises a plurality of groups of electric cylinders and a lower guiding wheel which is arranged on the movable end of each electric cylinder, the lower guiding wheels are respectively abutted to the lower surface of each steel strip, the tension adjusting device further comprises a tension sensor, the tension sensor is used for detecting the tension of the steel strips and feeding back signals to the control unit, and the control unit controls the running state of each electric cylinder.

When the steel belt is pulled, if the tension is too small, the steel belt can be bent to a certain extent, so that the spraying thicknesses of the upper surface and the lower surface of the steel belt after spraying are different, and therefore, before spraying, the tension of the steel belt is adjusted through the tension adjusting device, and the uniformity of the steel belt during spraying is improved; the tension sensor can be a plurality of tension sensors used for respectively detecting the tension of each steel strip, and the control unit controls the lifting of each electric cylinder through detected signals collected by feedback, so that the tension of each steel strip is automatically adjusted.

firstly, placing a plurality of bundles of steel belts on an unreeling frame 1 and dragging the steel belts by a tractor 8, and cleaning the surfaces of the steel belts by a deburring machine 2 and a cleaning machine 3 in the dragging process;

secondly, heating and drying the steel strip sequentially through a heating device 4 in the traction process, spraying a plastic spraying layer on the surface of the steel strip through a spraying device 5, solidifying through a high-temperature solidifying device 6, and integrally cooling through a cooling device 7.

The control unit also comprises a timing module and an alarm module, and the control unit also comprises the following control steps during spraying:

through the arrangement of the vacuum tank and the high-pressure tank, the vacuum pump and the air pressure pump only need to carry out pressure regulation control on the vacuum pump and the air pressure pump, so that the vacuum pump and the air pressure pump are more convenient, and pressure detection sensors and exhaust valves can be arranged on the vacuum tank and the high-pressure tank for carrying out detection feedback and exhausting in other abnormal states;

l2, in the spraying process, starting each spray gun 52;

l3, opening the first electromagnetic valve, and vacuumizing the negative pressure cavity 25 by the first tube group; the first flow sensor 33 and the first gravity sensor detect simultaneously; when the flow rate detected by the first flow sensor 33 is lower than the preset flow rate value and the pressure detected by the first gravity sensor is lower than the preset pressure value, the process goes to step L4; or when the pressure detected by the first gravity sensor is not lower than the preset pressure value, the step L4 is also performed;

that is, when the flow detected by the first flow sensor 33 is lower than the preset flow value and the pressure detected by the first gravity sensor is lower than the preset pressure value, it indicates that the powder accumulated in the first main pipe 27 is not much, but the filter bag 31 is blocked; or when the pressure detected by the first gravity sensor is not lower than the preset pressure value, it indicates that the powder accumulated in the first main pipe 27 is excessive and needs to be discharged;

l4, the second electromagnetic valve is opened, the second pipe group realizes the vacuum pumping treatment of the negative pressure cavity 25, then the first electromagnetic valve is closed, the fourth electromagnetic valve is opened, the fifth electromagnetic valve is in a closed state, the control valve in the first main pipe 27 is in a power-on state, the control valve in the second main pipe is in a power-off state, the first main pipe 27 is supplied with air through the high-pressure tank, and the reverse dust removal is carried out on the filter bag 31 in the first main pipe 27; detecting by the second flow sensor and the second gravity sensor at the same time, and entering a step L5 when the flow detected by the second flow sensor is lower than a preset flow value and the pressure detected by the second gravity sensor is lower than a preset pressure value; or when the pressure detected by the gravity sensor is higher than the preset pressure value, the step L5 is also entered;

the L5, the second solenoid valve and the fourth solenoid valve are closed, and the control valve in the first main pipeline 27 is in a power-off state; meanwhile, the fifth electromagnetic valve is opened, and the control valve in the second outlet pipeline is in an electrified state; and returns to step L3;

in step L4, after the first electromagnetic valve is closed, the timing module records a single opening time of the first electromagnetic valve, where the single opening time is a time for continuous opening before the first electromagnetic valve is closed, and if the single opening time is greater than a preset time value, the single opening time is normal, and when the single opening time is less than or equal to the preset time value, the single opening time indicates that the first main pipe 27 is abnormal, and if the effect of the filter bag 31 is poor, the filter bag is easily blocked in a short time, and ash removal in a short time is required, the alarm module alarms;

in step L5, after the second electromagnetic valve is closed, the timing module records a single opening time of the second electromagnetic valve, if the single opening time is greater than a preset time value, the single opening time is normal, and when the single opening time is less than or equal to the preset time value, the second main pipe is abnormal, if the effect of the filter bag 31 is poor, the filter bag is easy to block in a short time, ash removal in a short time is needed, and an alarm is given through the alarm module.

In step L4, the opening mode of the fourth electromagnetic valve may be a continuous mode or an intermittent pulse mode, and when the flow detected by the first flow sensor 33 is not lower than the preset flow value and the pressure detected by the first gravity sensor is lower than the preset pressure value, the fourth electromagnetic valve and the control valve in the first main pipe 27 are closed in advance; unnecessary air supply is avoided, and the influence on the negative pressure cavity 25 during air supply can be reduced;

in step L5, the opening mode of the fifth electromagnetic valve may also be a continuous or intermittent pulse type, and when the flow detected by the second flow sensor is not lower than the preset flow value and the pressure detected by the second gravity sensor is lower than the preset pressure value, the fifth electromagnetic valve and the control valve in the second main pipe are closed in advance; unnecessary air supply is avoided, and the influence on the negative pressure chamber 25 during air supply can be reduced.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. A molding system of a packing belt is characterized in that: comprises an unreeling frame (1), a deburring machine (2), a cleaning machine (3), a heating device (4), a spraying device (5), a high-temperature curing device (6), a cooling device (7), a tractor (8) and a control unit which are arranged in sequence,

the unreeling rack (1) is used for placing a plurality of groups of bundled steel strips;

the deburring machine (2) is used for removing burrs on the steel belt;

the cleaning machine (3) is used for cleaning impurities on the steel strip;

the heating device (4) is used for drying the steel strip;

the spraying device (5) is used for spraying the plastic powder on the surface of the steel strip to form a plastic spraying layer;

the high-temperature curing device (6) is used for curing the plastic powder to form a packing belt;

a cooling device (7) for cooling the strapping band;

a tractor (8) for dragging the packing belt;

the control unit is used for controlling the operation of the unreeling frame (1), the deburring machine (2), the cleaning machine (3), the heating device (4), the spraying device (5), the high-temperature curing device (6), the cooling device (7) and the tractor (8);

the spraying device comprises a spraying cylinder (50), a spraying cavity (51) and a plurality of spray guns (52) are arranged in the spraying cylinder (50), and the spray guns (52) are annularly and equidistantly arranged on the periphery of the spraying cavity (51);

the spray gun (52) comprises a first-stage mixing area and a second-stage mixing area which are communicated, the first-stage mixing area comprises an outer barrel (10), a first inner barrel (11) and a second inner barrel (12), the first inner barrel (11) and the outer barrel (10) are sequentially sleeved from inside to outside, the outer barrel (10) is used for inputting and recovering powder, main powder is input into the second inner barrel (12), auxiliary powder is input into the first inner barrel (11), a first necking channel (13) is arranged at the outlet end of the outer barrel (10), a second necking channel (14) is arranged at the outlet end of the first inner barrel (11), a third necking channel (15) is arranged at the outlet end of the second inner barrel (12), the second necking channel (14) surrounds the outer side of the third necking channel (15), and a pre-mixing area is formed between the first necking channel (13) and the second necking channel (14) in the axial direction, the inlet end of the second-stage mixing area is provided with a feeding channel (16) communicated with the first necking channel (13), the inlet end of the second-stage mixing area is also provided with an air pipe (17) arranged around the feeding channel (16), the air pipe (17) is connected with an air inlet pipe (18) which is axially, obliquely blown to the air pipe (17) and tangentially arranged with the air pipe (17), the outlet end of the second-stage mixing area is also provided with a spraying channel (19), an electrostatic generating device is arranged in the spraying channel (19), a mixing cavity (20) is also arranged in the second-stage mixing area, the mixing cavity (20) is of a conical structure, the small end of the mixing cavity (20) is communicated with the air pipe (17), the large end of the mixing cavity (20) is communicated with the spraying channel (19), and the inner diameter of the spraying channel (19) is smaller than the inner diameter of the large end of the mixing cavity (20);

a shunt rod (21) which is coaxial with the air pipe (17) is further arranged in the injection channel (19), the static electricity generating device comprises a high-voltage cable (22), a current-limiting resistor (23) which is arranged in the shunt rod (21) and a discharge needle (24) which is arranged at the end part of the shunt rod (21), the high-voltage cable (22), the current-limiting resistor (23) and the discharge needle (24) are sequentially connected, the outer edge of the high-voltage cable (22) is connected to the outside of the spray gun (52), the shunt rod (21) is made of insulating materials, the outer end of the injection channel (19) is further provided with a flaring with a conical structure, the inner end of the shunt rod (21) is provided with an arc-shaped flow guide part which is right opposite to the air pipe (17), the arc-shaped flow guide part extends into the mixing cavity (20), the outer end of the shunt rod (21) is provided with a conical-shaped flow guide part which corresponds to the flaring, the mounting rod (39) which is arranged in the mixing cavity (20) is further arranged on the shunt rod (21), the end part of the mounting rod (39) is provided with a guide impeller (40) which is opposite to the third necking channel (15).

2. The forming system of a strapping band of claim 1, wherein: heating device (4) are equipped with heating coil (42) including heating cabinet (41) that can open and shut from top to bottom in heating cabinet (41), be equipped with insert (43) that the symmetry set up on the both sides of heating cabinet (41), be equipped with the through-hole that supplies the steel band to pass on insert (43), through-hole and heating coil (42) coaxial setting, still be equipped with the caulking groove on the through-hole inner wall, be equipped with graphite strip (44) in the caulking groove, heating coil (42) external power supply controller, still be equipped with temperature sensor in heating cabinet (41), temperature sensor is used for detecting the temperature in heating cabinet (41) and feeds back to power supply controller.

3. The forming system of a strapping band of claim 1, wherein: a negative pressure cavity (25) is arranged between the peripheral wall of the spray attaching cavity (51) and the spray attaching barrel (50), a plurality of negative pressure holes (26) communicated with the negative pressure cavity (25) are formed in the spray attaching cavity (51), a negative pressure pipe communicated with the negative pressure cavity (25) is further arranged on the spray attaching barrel (50), the negative pressure holes (26) and the negative pressure pipe are arranged in a staggered mode, the negative pressure pipe comprises a first pipe group and a second pipe group, the first pipe group comprises a first main pipe (27) and a plurality of first auxiliary pipelines (28), the second pipe group comprises a second main pipe and a plurality of second auxiliary pipelines (29), a fourth necking channel (30) is arranged in the center of the first main pipe (27), one end of the first auxiliary pipeline (28) is communicated with the negative pressure cavity (25), the other end of the first auxiliary pipeline (28) is radially communicated with the fourth necking channel (30), a fifth necking channel is arranged in the center of the second main pipe, one end of the second auxiliary pipeline (29) is communicated with the negative pressure cavity (25), the other end and the radial intercommunication of fifth throat passageway of second auxiliary conduit (29), and the head end of first trunk line (27) and the head end of second trunk line all are equipped with filter bag (31), and the tail end of first trunk line (27) and the tail end of second trunk line all are equipped with collecting box (32).

4. A strapping band forming system according to claim 3, wherein: the spraying device (5) also comprises a pneumatic control system, the pneumatic control system comprises a vacuum tank and a vacuum pumping pump, the vacuum pump is characterized by comprising a high-pressure tank and an air pressure pump, wherein the air exhaust end of the vacuum pump is communicated with the air outlet end of a vacuum tank, the air supply end of the air pressure pump is communicated with the air inlet end of the high-pressure tank, a first switch valve is arranged between the vacuum pump and the vacuum tank, a second switch valve is arranged between the air pressure pump and the high-pressure tank, the air inlet end of the vacuum tank is communicated with the head end of a first main pipeline (27) through a first electromagnetic valve, the air inlet end of the vacuum tank is communicated with the head end of a second main pipeline through a second electromagnetic valve, the air inlet end of the vacuum tank is communicated with a collecting box (32) through a third electromagnetic valve, the air outlet end of the high-pressure tank is communicated with the first main pipeline (27) through a fourth electromagnetic valve, and the air outlet end of the high-pressure tank is communicated with the second main pipeline through a fifth electromagnetic valve;

still be equipped with first flow sensor (33) that are used for detecting the inside gas flow of first trunk line (27) on the head end of first trunk line (27), be equipped with the second flow sensor that is used for detecting the inside gas flow of second trunk line on the head end of second trunk line, all still be equipped with the control valve between the tail end of first trunk line (27) and collecting box (32) and between the tail end of second trunk line and collecting box (32).

5. The forming system of a strapping band of claim 4, wherein: the tail end of the first main pipeline (27) and the tail end of the second main pipeline are both provided with valve ports, the control valve comprises a valve core and an electromagnet (34) for controlling the valve core to open and close, the valve core comprises a valve rod (35) and a valve clack (36) which are connected, the valve clack (36) is matched with the valve ports, a guide ring sleeved on the valve rod (35) is further arranged in the control valve, and a reset spring (37) and an iron block (38) are arranged on the valve rod (35); when the electromagnet (34) is powered off, the valve clack (36) rises to be abutted against the valve port for closing under the action of the return spring (37), and when the electromagnet (34) is powered on, the iron block (38) is attracted, so that the valve clack (36) descends, and the valve port is in an open state; a first gravity sensor is further arranged on the valve clack (36) on the first main pipe (27), and a second gravity sensor is further arranged on the valve clack (36) on the second main pipe.

6. The forming system of a strapping band of claim 1, wherein: the forming system further comprises a tension adjusting device, the tension adjusting device is located between the heating device (4) and the spray-attaching device (5), the tension detecting device comprises an upper guiding device (90) and a lower adjusting device, the upper guiding device (90) comprises a front group and a rear group, each upper guiding device (90) comprises an upper guiding wheel which is abutted to the upper surface of each steel strip respectively, the lower adjusting device is located between the two groups of upper guiding devices (90), the lower adjusting device comprises a plurality of groups of electric cylinders and a lower guiding wheel which is arranged on the movable end of each electric cylinder, the lower guiding wheels are abutted to the lower surface of each steel strip respectively, the tension adjusting device further comprises a tension sensor, the tension sensor is used for detecting the tension of the steel strips and feeding signals back to the control unit, and the control unit controls the running state of each electric cylinder.

7. A forming process using the strapping band forming system of any of claims 1 to 6, wherein: the method comprises the following steps:

firstly, placing a plurality of bundles of steel belts on an unreeling frame (1) and dragging the steel belts by a tractor (8), and cleaning the surfaces of the steel belts by a deburring machine (2) and a cleaning machine (3) in the dragging process;

secondly, heating and drying the steel strip sequentially through a heating device (4) in the traction process, spraying a plastic spraying layer on the surface of the steel strip through a spraying device (5), solidifying through a high-temperature solidifying device (6), and integrally cooling through a cooling device (7).