A multifunctional packaging machine and method for packaging fumed silica

Abstract

A multifunctional packaging machine and method for fumed silica packaging, comprising a frame, a vacuum box, a feeding unit, a weighing unit, a hoisting unit, and a shaping unit, wherein the vacuum box is mounted on the frame, the vacuum box is provided with an opening and closing door, the feeding unit is connected to the vacuum box, and is used to transport silica powder into the vacuum box during packaging, the weighing unit is mounted on the top wall of the vacuum box, the upper end of the hoisting unit is suspended on the bottom of the weighing unit, and a shaping unit is mounted on the hoisting unit; the vacuum box is connected to the frame through a connecting column, and when in use, a packaging bag for packaging silica powder is placed in the shaping unit, the feeding port of the packaging bag is connected to the feeding unit, and vacuum filling is performed quickly and accurately through the feeding unit, and the weighing unit weighs the silica packaging during the filling process. The silica powder can be packaged accurately and quickly, and the measurement is accurate, and there will be no bag bursting or powder leakage.

Description

Technical Field

[0001] The invention relates to the technical field of powder packaging, and in particular to a multifunctional packaging machine and method for packaging fumed silica. Background Art

[0002] Fumed silica is a white fluffy powder with good fluidity and fine particles. It belongs to the nanometer level and has a wide range of applications. The current mainstream packaging specification on the market is 10kg / bag. The packaging process of fumed silica is usually divided into two methods: positive pressure packaging and negative pressure packaging. The positive pressure packaging machine squeezes the fumed silica into the packaging bag through a spiral feeder. The negative pressure packaging is mainly done by vacuuming the negative pressure packaging machine. Under the action of negative pressure, the fumed silica is sucked into the packaging bag in the negative pressure packaging machine at a certain speed to achieve the packaging purpose.

[0003] However, the existing gas phase packaging machine usually has the following problems during the packaging process: (1) Bag bursting; there are two factors causing bag bursting: first, there is no fixed shaping facility for the packaging bag, and the vacuum environment inside the packaging machine causes a large amount of gas phase silica to enter the packaging bag and instantly break through the packaging bag; second, there is a certain weight deviation when packaging gas phase silica, and the bag bursts when overfilling; (2) Powder leakage: due to the inaccurate metering of the existing technology, the negative pressure of the vacuum box is too large, and the excess gas phase silica powder escapes through the discharge pipe. (3) The weighing accuracy is inaccurate, the negative pressure control is unstable, and the weight drifts during the weighing and feeding process. Therefore, the inventor provides a multifunctional packaging machine for gas phase silica packaging to solve this problem.

[0004] Chinese patent document CN1201969C discloses a powder vacuum packaging machine, which is characterized in that the powder product is sucked into the packaging bag placed in the vacuum packaging chamber by utilizing the pressure difference between the vacuum packaging chamber and the feeding device, so as to realize the packaging of the powder in a closed vacuum state. However, the disadvantage is that the scheme does not have a shaping unit and the metering is not accurate. The bag may easily burst and the packaging bag may fall off and the powder may leak during packaging, resulting in powder waste. Summary of the invention

[0005] The technical problem to be solved by the present invention is to solve the problems existing in the above-mentioned background technology and provide a multifunctional packaging machine for packaging fumed silica, by which silica powder can be packaged accurately and quickly. At the same time, through the combination of a shaping unit and a weighing unit, the measurement is accurate and there will be no bag bursting or powder leakage.

[0006] Another technical problem to be solved by the present invention is to provide a method for packaging silicon dioxide powder using a multifunctional packaging machine for packaging fumed silicon dioxide, which can accurately and quickly package the silicon dioxide powder.

[0007] In order to achieve the above-mentioned technical features, the purpose of the present invention is achieved as follows: a multifunctional packaging machine for packaging fumed silica, comprising a frame, a vacuum box, a feeding unit, a weighing unit, a hoisting unit, and a shaping unit, wherein the vacuum box is installed on the frame, the vacuum box is provided with an opening and closing door, the feeding unit is connected to the vacuum box, and is used to transport silica powder into the vacuum box during packaging, the weighing unit is installed on the top wall of the vacuum box, the upper end of the hoisting unit is suspended on the bottom of the weighing unit, and a shaping unit is installed on the hoisting unit; when in use, a packaging bag for packaging silica powder is placed in the shaping unit, the feeding port of the packaging bag is connected to the feeding unit, and fast and accurate vacuum filling is performed through the feeding unit, and the weighing unit weighs the silica packaging during the filling process.

[0008] The longitudinal cross-section of the opening and closing door is triangular, and the longitudinal cross-section of the fixed side of the vacuum box is also triangular. The hypotenuse side of the opening and closing door and the hypotenuse side of the fixed side of the vacuum box can be sealed and combined into a box structure. At least two fixed arms are provided on the straight side of the fixed side of the vacuum box, and an articulated arm corresponding to the fixed arm is provided on the straight side of the opening and closing door. One end of the articulated arm is fixedly connected to the opening and closing door, the middle part is hinged to the fixed arm, and the other end is hinged to the piston rod end of the switch door cylinder, and the cylinder end of the switch door cylinder is hinged to the frame or the fixed side of the vacuum box.

[0009] The vacuum box is also provided with a vacuum valve, a vacuum breaking valve, a dust removal valve and a vacuum pressure switch gauge. The vacuum breaking valve and the vacuum pressure switch gauge form an interlock to automatically control the vacuum pressure inside the vacuum box.

[0010] The feeding unit includes a first three-way joint, a spiral feeding valve, a first feeding valve, an air intake valve, a second feeding valve, a second three-way joint, a feeding main valve and an air bag outlet. The upper interface of the first three-way joint is used to connect the conveying screw for feeding, the lower interface of the first three-way joint is connected to one end of the spiral feeding valve, the other end of the spiral feeding valve is connected to one end of the first feeding valve, the other end of the first feeding valve is connected to one end of the second three-way joint, the end of the second three-way joint away from the first feeding valve is connected to one end of the feeding main valve, the other end of the feeding main valve is communicated with the air bag outlet, the side interface of the first three-way joint is connected to one end of the second feeding valve, the other end of the second feeding valve is communicated with the side interface of the second three-way joint, the air bag outlet is installed inside the vacuum box, the feeding main valve is communicated with the air bag outlet through a pipeline, and the air intake valve is installed on the pipeline between the first feeding valve and the spiral feeding valve.

[0011] The weighing unit includes a top plate, a bottom plate, a first connecting pin, a weighing sensor, and a second connecting pin. The bottom plate is located on the lower side of the top plate, and multiple weighing sensors are installed between the bottom plate and the top plate. Multiple first connecting pins penetrate upward from the lower part of the bottom plate, and then pass through the top plate and connect with the top wall on the fixed side of the vacuum box. The first connecting pin and the top plate are gap-matched. Multiple second connecting pins penetrate downward from the upper side of the top plate, and then pass through the bottom plate. The lower end is connected to the top of the lifting unit, and the second connecting pin and the bottom plate are gap-matched.

[0012] The lifting unit includes an upper support plate, a lower support plate, and support rods. The upper support plate is connected to the second connecting pin of the weighing unit. The lower support plate is located on the lower side of the upper support plate and close to the bottom wall of the vacuum box. Multiple support rods are installed between the upper support plate and the lower support plate to form a support space for accommodating the shaping unit.

[0013] The shaping unit includes two shaping plates arranged with longitudinal intervals, and guide slide groups are respectively installed on the upper and lower ends of the shaping plates, and guide slide rails are respectively installed on the side opposite to the upper support plate and the lower support plate of the lifting unit. The shaping plates are installed on the guide slide rails through the guide slide groups, and the shaping plates on both sides are driven by the execution structure to make the shaping plates on both sides move linearly toward or away from each other; ventilation holes are provided on the shaping plates, and an arc plate is provided on the upper end of the shaping plates. The airbag discharge port of the feeding unit is located between the arc plates on both sides. When the shaping plates on both sides move toward each other, the arc plates on both sides can simultaneously press the airbag discharge port.

[0014] The execution structure includes a rotating seat, a rotating shaft, a rocker arm, a swivel arm, and a shaping cylinder. The rotating seats are respectively fixedly mounted on the sides opposite to the upper supporting plate and the lower supporting plate of the lifting unit, the rotating shaft is rotatably mounted in the rotating seat, the rocker arm is mounted on one end of the rotating shaft located on the shaping plate, and a hinge seat is respectively provided on one side of the shaping plate corresponding to the rocker arm. The middle part of the rocker arm is fixedly connected to the rotating shaft, and the two ends are respectively hinged to the hinge seats of the shaping plates on both sides. The other end of the rotating shaft extends outward and is fixedly mounted with a swivel arm. The cylinder body end of the shaping cylinder is hinged to the lifting unit, and the piston rod end is hinged to the swivel arm. The piston rod of the shaping cylinder is extended to drive the shaping plates on both sides to move synchronously together; the upper and lower ends of the shaping plates on both sides are respectively installed with a locking cylinder and a locking plate, one end of the locking plate is fixedly connected to one side of the shaping plate, and the other end extends to one side of the locking cylinder.

[0015] The hoisting unit is also provided with a rotating wheel group, which is located between the shaping plates on both sides of the shaping unit and is used to lift the packaging bags. The rotating wheel group includes a support frame and a roller. The support frame is installed on the upper side of the lower support plate of the hoisting unit, and the roller is rotatably installed on the support frame.

[0016] A method for packaging silica using the multifunctional packaging machine for packaging fumed silica comprises the following steps:

[0017] S1. Open the door of the vacuum box, place the bag for filling the silica powder between the shaping plates on both sides of the shaping unit, insert the feed port of the bag into the airbag outlet of the feed unit, inflate the airbag on the airbag outlet, and fix the bag;

[0018] S2. The piston rod of the shaping cylinder extends to drive the shaping plates on both sides to move closer to each other. At the same time, the arc plates on the upper ends of the shaping plates on both sides compress the packaging bag on the outlet of the airbag; at the same time, the piston rod of the locking cylinder extends and penetrates the circular hole of the locking plate;

[0019] S3. Close the door, open the vacuum valve, and use the vacuum device to evacuate the vacuum box. The vacuum degree in the vacuum box reaches 0.5~0.8kg / cm 2 Start filling after negative pressure;

[0020] S4. Rapid filling stage: Before filling, the spiral feed valve, the first feed valve, the air intake valve, and the second feed valve are opened, and then the main feed valve is opened. At this time, the powder is quickly sucked into the packaging bag in the vacuum box through two pipes under the action of vacuum. When the weighing sensor of the weighing unit detects that the powder in the packaging bag has reached 95% of the target weight, fine feeding is carried out;

[0021] S5. Fine feeding stage: At this time, the second feeding valve is closed, and the powder in the first three-way joint is fed only through the spiral feeding valve. At this time, the filling speed is determined by the feeding speed of the spiral feeding valve, which effectively controls the filling speed when approaching the target weight and realizes precise quantitative control. When the target weight is reached, the vacuum valve and the main feeding valve are closed;

[0022] S6. Material removal stage: the vacuum breaking valve opens to balance the air pressure in the vacuum box with the outside air pressure, the door opening and closing cylinder is ventilated, the piston rod contracts, the door is opened, the dust removal valve opens, and the vacuum box is dusted under negative pressure through the external dust removal device;

[0023] S7. Package removal: The airbag on the airbag outlet is deflated, and the feeding port of the packaging bag is removed from the airbag outlet. The shaping cylinder is activated to drive the swing arm to rotate, thereby pushing the shaping plates on both sides away from each other. The silica package falls on the rotating wheel set, and the rotating wheel set is connected to the conveyor belt of the next process, so that the silica package is moved out of the vacuum box.

[0024] The present invention has the following beneficial effects:

[0025] 1. The packaging bag for packaging silica powder is placed in the shaping unit, and the feeding port of the packaging bag is connected to the feeding unit. The feeding unit is used for rapid and accurate vacuum filling, and the weighing unit weighs the silica packaging during the filling process. The silica powder can be packaged accurately and quickly, and the measurement is accurate, without bag bursting or powder leakage.

[0026] 2. The longitudinal section of the opening and closing door is triangular, and the longitudinal section of the fixed side of the vacuum box is also triangular. The hypotenuse side of the opening and closing door and the hypotenuse side of the fixed side of the vacuum box can be sealed and combined into a box structure, so that the opening and closing door has a larger opening range, which is convenient for the packaging bags to enter and exit.

[0027] 3. The feeding unit can perform two modes: fast filling and fine filling, thus achieving fast and fine filling effects.

[0028] 4. The first connecting pin and the second connecting pin of the weighing unit not only play the role of connecting support, but also play the role of guiding, so that the lifting unit can be stably connected under the weighing unit. The packaging bag being filled pulls down the second connecting pin, so that the top plate presses down the weighing sensor, thereby weighing the packaging bag being filled in real time.

[0029] 5. Before filling the packaging bag, the shaping plates of the shaping unit move towards each other to clamp and shape the packaging bag to prevent the packaging bag from being broken due to the instantaneous impact during filling. There are vents on the shaping plate to facilitate the escape of air in the packaging bag. There is an arc plate on the upper end of the shaping plate. When the shaping plate clamps and shapes the packaging bag, the arc plate presses the packaging bag to the feed port to prevent the packaging bag from falling off due to excessive impact.

[0030] 6. A rotating wheel set is provided to support the packaging bag during filling, so that the weighing unit can measure more accurately and it is also convenient to take out the filled packaging. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the main structure of the present invention.

[0032] Figure 2 It is a side view structural schematic diagram of the present invention.

[0033] Figure 3 It is a schematic diagram of the top view structure of the present invention.

[0034] Figure 4 It is a schematic diagram of the three-dimensional structure of the present invention.

[0035] Figure 5 It is a schematic diagram of the connection structure of the weighing unit and the lifting unit of the present invention.

[0036] Figure 6It is a three-dimensional schematic diagram of the connection structure of the weighing unit, the hoisting unit and the shaping unit of the present invention.

[0037] Figure 7 for Figure 6 Enlarged structural diagram at A in the middle.

[0038] In the figure: a frame 10, a connecting column 11;

[0039] Vacuum box 20, opening and closing door 21, vacuum valve 22, vacuum breaking valve 23, dust removal valve 24, fixed arm 25, hinged arm 26, door opening and closing cylinder 27, top wall 28, vacuum pressure switch gauge 29;

[0040] Feed unit 30, first three-way joint 31, spiral feed valve 32, first feed valve 33, air intake valve 34, second feed valve 35, second three-way joint 36, feed main valve 37, air bag outlet 38;

[0041] Weighing unit 40, top plate 41, bottom plate 42, first connecting pin 43, weighing sensor 44, second connecting pin 45;

[0042] A hoisting unit 50, an upper support plate 51, a lower support plate 52, and a support rod 53;

[0043] Shaping unit 60, shaping plate 61, vent hole 611, arc plate 612, locking cylinder 613, locking plate 614, guide rail 62, guide slide group 63, rotating seat 64, rotating shaft 65, swing rod 66, articulated seat 67, rotating arm 68, shaping cylinder 69;

[0044] Rotating wheel set 70, supporting frame 71, roller 72. DETAILED DESCRIPTION

[0045] The embodiments of the present invention are further described below in conjunction with the accompanying drawings.

[0046] Embodiment 1:

[0047] See also Figure 1-7A multifunctional packaging machine for packaging fumed silica comprises a frame 10, a vacuum box 20, a feeding unit 30, a weighing unit 40, a hanging unit 50, and a shaping unit 60. The vacuum box 20 is mounted on the frame 10, and the vacuum box 20 is provided with an opening and closing door 21. The feeding unit 30 is communicated with the vacuum box 20 and is used to transport silica powder into the vacuum box 20 during packaging. The weighing unit 40 is mounted on the top wall of the vacuum box 20, and the upper end of the hanging unit 50 is suspended on the bottom of the weighing unit 40. The shaping unit 60 is mounted on the hanging unit 50. The vacuum box 20 is connected to the frame 10 through a connecting column 11. When in use, a packaging bag for packaging silica powder is placed in the shaping unit 60, and a feeding port of the packaging bag is connected to the feeding unit 30. Rapid and accurate vacuum filling is performed through the feeding unit 30, and the weighing unit 40 weighs the silica packaging during the filling process.

[0048] The silicon dioxide powder is sucked into the packaging bag by utilizing the pressure difference between the vacuum box 20 and the feeding unit 30, so that the powder can be packaged under vacuum. The weighing unit 40, the hoisting unit 50, and the shaping unit 60 are integrated and installed in the vacuum box 20, so that the weighing is more accurate. The feeding unit 30 has two control structures, namely, fast filling and fine filling, which can accurately feed the packaging bag in the vacuum box 20, so that the silicon dioxide powder can be packaged accurately and quickly, and the measurement is accurate, and there will be no bag bursting or powder leakage.

[0049] See also Figure 3 The longitudinal section of the opening and closing door 21 is triangular, and the longitudinal section of the fixed side of the vacuum box 20 is also triangular. The hypotenuse side of the opening and closing door 21 and the hypotenuse side of the fixed side of the vacuum box 20 can be sealed and combined to form a box structure. At least two fixed arms 25 are provided on one side of the straight side of the fixed side of the vacuum box 20. A hinged arm 26 corresponding to the fixed arm 25 is provided on one side of the straight side of the opening and closing door 21. One end of the hinged arm 26 is fixedly connected to the opening and closing door 21, the middle part is hinged to the fixed arm 25, and the other end is hinged to the piston rod end of the switch door cylinder 27. The cylinder end of the switch door cylinder 27 is hinged to the frame 10 or the fixed side of the vacuum box 20. Through the above structure, the opening and closing door 21 has a larger opening range, which is convenient for the entry and exit of packaging bags.

[0050] See also Figure 1 The vacuum box 20 is also provided with a vacuum valve 22, a vacuum breaking valve 23, a dust removal valve 24 and a vacuum pressure switch gauge 29. The vacuum breaking valve 23 and the vacuum pressure switch gauge 29 form an interlock to automatically control the vacuum pressure inside the vacuum box 20. The vacuum valve 20 is connected to the vacuum device. When the vacuum valve 20 is opened, the vacuum box 20 is evacuated. When the vacuum breaking valve 23 is working, it is used to stabilize the vacuum negative pressure in the vacuum box 20. When taking out the package, it is used to balance the vacuum box 20 with the outside air, so as to facilitate opening the opening and closing door 21.

[0051] See also Figure 1 The feeding unit 30 includes a first three-way joint 31, a spiral feeding valve 32, a first feeding valve 33, an air intake valve 34, a second feeding valve 35, a second three-way joint 36, a feeding main valve 37 and an air bag outlet 38. The upper interface of the first three-way joint 31 is used to connect the feeding conveying screw, the lower interface of the first three-way joint 31 is connected to one end of the spiral feeding valve 32, the other end of the spiral feeding valve 32 is connected to one end of the first feeding valve 33, the other end of the first feeding valve 33 is connected to one end of the second three-way joint 36, and the first One end of the second three-way joint 36 away from the first feed valve 33 is connected to one end of the feed main valve 37, and the other end of the feed main valve 37 is connected to the airbag discharge port 38. The side interface of the first three-way joint 31 is connected to one end of the second feed valve 35, and the other end of the second feed valve 35 is connected to the side interface of the second three-way joint 36. The airbag discharge port 38 is installed inside the vacuum box 20, and the feed main valve 37 is connected to the airbag discharge port 38 through a pipeline. The air intake valve 34 is installed on the pipeline between the first feed valve 33 and the spiral feed valve 32. Through the above structure, two modes of fast filling and fine filling can be performed, so that a fast and fine filling effect can be achieved.

[0052] During rapid filling, the spiral feed valve 32, the first feed valve 33, the air intake valve 34, and the second feed valve 35 are opened, and then the main feed valve 37 is opened. At this time, the powder is quickly sucked into the packaging bag in the vacuum box 20 through two pipes under the action of vacuum.

[0053] During fine filling, the second feed valve 35 is closed, and the powder in the first three-way joint 31 is fed only through the spiral feed valve 32. At this time, the filling speed is determined by the feeding speed of the spiral feed valve 32, which effectively controls the filling speed when approaching the target weight and realizes precise quantitative control.

[0054] Referring to 4-6, the weighing unit 40 includes a top plate 41, a bottom plate 42, a first connecting pin 43, a weighing sensor 44, and a second connecting pin 45. The bottom plate 42 is located at the lower side of the top plate 41, and a plurality of the weighing sensors 44 are installed between the bottom plate 42 and the top plate 41. The plurality of the first connecting pins 43 penetrate upward from the lower part of the bottom plate 42, and then pass through the top plate 41 and connect with the top wall 28 in the fixed side of the vacuum box 20. The first connecting pin 43 is clearance-matched with the top plate 41. The plurality of the second connecting pins 45 penetrate downward from the upper side of the top plate 41, and then pass through the bottom plate 42, and the lower end is connected with the top of the hanging unit 50. The second connecting pin 45 is clearance-matched with the bottom plate 42. Preferably, the range of the weighing sensor 44 is selected as 3 220kg, which is accumulated to a range of 0-660kg, and is fixed to the top plate 41 and the bottom plate 42 respectively by bolts. The first connecting pin 43 and the second connecting pin 45 not only play the role of connecting support, but also play the role of guiding, so that the hanging unit 50 is stably connected under the weighing unit 40. The packaging bag being filled pulls down the second connecting pin 45, so that the top plate 41 presses down the weighing sensor 44, so that the packaging bag being filled is weighed in real time.

[0055] See also Figure 5 , 6 The hoisting unit 50 includes an upper support plate 51, a lower support plate 52, and a support rod 53. The upper support plate 51 is connected to the second connecting pin 45 of the weighing unit 40. The lower support plate 52 is located at the lower side of the upper support plate 51 and close to the inner bottom wall of the vacuum box 20. A plurality of support rods 53 are installed between the upper support plate 51 and the lower support plate 52 to form a support space for accommodating the shaping unit 60. The structure is simple, the stability is good, and the weight is reduced as much as possible.

[0056] See also Figure 6 , 7The shaping unit 60 includes two shaping plates 61 arranged at intervals in the longitudinal direction, and guide slide groups 63 are respectively installed at the upper and lower ends of the shaping plate 61, and guide slide rails 62 are respectively installed on the side opposite to the upper support plate 51 and the lower support plate 52 of the lifting unit 50. The shaping plate 61 is installed on the guide slide rail 62 through the guide slide group 63, and the shaping plates 61 on both sides are driven by the execution structure to make the shaping plates 61 on both sides move linearly toward or away from each other; the shaping plate 61 is provided with a vent hole 611, and the upper end of the shaping plate 61 is provided with an arc plate 612, and the airbag outlet 38 of the feeding unit 30 is located between the arc plates 612 on both sides. When the shaping plates 61 on both sides move toward each other, the arc plates 612 on both sides can simultaneously press the airbag outlet 38. Before filling the packaging bag, the shaping plates 61 move towards each other to clamp and shape the packaging bag to prevent the packaging bag from being broken due to the instantaneous impact during filling. The shaping plates 61 are provided with vent holes 611 to facilitate the escape of air in the packaging bag. The upper end of the shaping plates 61 is provided with an arc plate 612. When the shaping plates 61 clamp and shape the packaging bag, the arc plate 612 presses the packaging bag to the feed port to prevent the packaging bag from falling off due to excessive impact. Preferably, the guide slide group 63 is a structure of two grooved rollers combined to adapt to dusty environments.

[0057] For details, see Figure 6 , 7The execution structure includes a rotating seat 64, a rotating shaft 65, a swing rod 66, a rotating arm 68, and a shaping cylinder 69. The rotating seat 64 is fixedly installed on the side opposite to the upper support plate 51 and the lower support plate 52 of the lifting unit 50, and the rotating shaft 65 is rotatably installed in the rotating seat 64. The swing rod 66 is installed on one end of the rotating shaft 65 located on the shaping plate 61. The shaping plate 61 is provided with a hinge seat 67 on one side corresponding to the swing rod 66. The middle part of the swing rod 66 is fixedly connected to the rotating shaft 65, and the two ends are respectively connected to the shaping cylinders on both sides. The hinge seat 67 of the shaping plate 61 is hinged, and the other end of the rotating shaft 65 extends outward and is fixedly installed with a rotating arm 68. The cylinder end of the shaping cylinder 69 is hinged with the hoisting unit 50, and the piston rod end is hinged with the rotating arm 68. The piston rod of the shaping cylinder 69 extends out to drive the shaping plates 61 on both sides to move synchronously together; the upper and lower ends of the shaping plates 61 on both sides are respectively installed with a locking cylinder 613 and a locking plate 614, one end of the locking plate 614 is fixedly connected to one side of the shaping plate 61, and the other end extends to one side of the locking cylinder 613. By driving the swing rod 66 to rotate, the shaping plates 61 on both sides are driven at the same time. The shaping cylinder 69 drives the rotating shaft 65 to rotate through the rotating arm 68, and the lever structure of the rotating arm 68 makes the clamping force of the shaping plates 61 on both sides stronger. At the same time, after the shaping plates 61 on both sides are close to each other to the preset position, the other end of the locking plate 614 extends into the locking area of ​​the locking cylinder 613. A circular hole is provided on the locking plate 614. The piston rod of the locking cylinder 613 extends out and penetrates into the circular hole on the locking plate 614, thereby limiting the shaping plates 61 on both sides during packaging.

[0058] In order to support the packaging bag during filling, make the weighing unit 40 measure more accurately, and facilitate the removal of the filled packaging, the lifting unit 50 is also provided with a rotating wheel group 70. The rotating wheel group 70 is located between the shaping plates 61 on both sides of the shaping unit 60 and is used to lift the packaging bag. The rotating wheel group 70 includes a support frame 71 and a roller 72. The support frame 71 is installed on the upper side of the lower support plate 52 of the lifting unit 50, and a plurality of rollers 72 are rotatably installed on the support frame 71.

[0059] Embodiment 2:

[0060] A method for packaging silica using the multifunctional packaging machine for packaging fumed silica comprises the following steps:

[0061] S1. Open the door 21 of the vacuum box 20, place the bag for filling the silica powder between the shaping plates 61 on both sides of the shaping unit 60, insert the feed port of the bag into the airbag outlet 38 of the feed unit 30, inflate the airbag on the airbag outlet 38, and fix the bag;

[0062] S2. The piston rod of the shaping cylinder 69 extends to drive the shaping plates 61 on both sides to approach each other, and the arc-shaped plates 612 on the upper ends of the shaping plates 61 on both sides press the packaging bag set on the airbag outlet 38; at the same time, the piston rod of the locking cylinder 613 extends and penetrates the circular hole of the locking plate 614, and the shaping plates 61 on both sides are mechanically limited;

[0063] S3. Close the opening and closing door 21, open the vacuum valve 22, and evacuate the vacuum box 20 by the vacuum device, and the vacuum degree in the vacuum box 20 reaches 0.5~0.8kg / cm 2 Start filling after negative pressure;

[0064] S4. Rapid filling stage: before filling, the spiral feed valve 32, the first feed valve 33, the air intake valve 34 and the second feed valve 35 are opened, and then the main feed valve 37 is opened. At this time, the powder is quickly sucked into the packaging bag in the vacuum box 20 through the two pipes under the action of vacuum. When the weighing sensor 44 of the weighing unit 40 detects that the powder in the packaging bag has reached 95% of the target weight, fine feeding is performed;

[0065] S5. Fine feeding stage: At this time, the second feed valve 35 is closed, and the powder in the first three-way joint 31 is fed only through the spiral feed valve 32. At this time, the filling speed is determined by the feeding speed of the spiral feed valve 32, and the filling speed is effectively controlled when approaching the target weight to achieve precise quantitative control. When the target weight is reached, the vacuum valve 22 and the main feed valve 37 are closed;

[0066] S6. Retrieving stage: the vacuum valve 23 is opened to balance the air pressure in the vacuum box 20 with the outside world, the door cylinder 27 is ventilated, the piston rod is retracted, the door 21 is opened, the dust removal valve 24 is opened, and the vacuum box 20 is dusted by the external dust removal device under negative pressure;

[0067] S7. Package removal: The airbag on the airbag outlet 38 is deflated, and the feed port of the packaging bag is removed from the airbag outlet 38. The shaping cylinder 69 is actuated to drive the swing rod 66 to rotate, thereby pushing the shaping plates 61 on both sides away from each other, and the silica package falls on the rotating wheel set 70. The rotating wheel set 70 is connected to the conveyor belt of the next process, thereby moving the silica package out of the vacuum box 20.

Claims

1. A multifunctional packaging machine for packaging fumed silica, comprising a frame (10), Features: The apparatus further comprises a vacuum box (20), a feeding unit (30), a weighing unit (40), a hanging unit (50), and a shaping unit (60); the vacuum box (20) is mounted on the frame (10); the vacuum box (20) is provided with an opening and closing door (21); the feeding unit (30) is in communication with the vacuum box (20) and is used to transport silicon dioxide powder into the vacuum box (20) during packaging; the weighing unit (40) is mounted on the top wall of the vacuum box (20); the upper end of the hanging unit (50) is suspended on the bottom of the weighing unit (40); and the shaping unit (60) is mounted on the hanging unit (50); when in use, a packaging bag for packaging silicon dioxide powder is placed in the shaping unit (60); the feeding port of the packaging bag is connected to the feeding unit (30); rapid and accurate vacuum filling is performed through the feeding unit (30); and the weighing unit (40) weighs the silicon dioxide packaging during the filling process; The weighing unit (40) comprises a top plate (41), a bottom plate (42), a first connecting pin (43), a weighing sensor (44), and a second connecting pin (45); the bottom plate (42) is located at the lower side of the top plate (41); a plurality of the weighing sensors (44) are installed between the bottom plate (42) and the top plate (41); a plurality of the first connecting pins (43) penetrate upward from the lower part of the bottom plate (42), and then pass through the top plate (41) to be connected to the top wall (28) on the fixed side of the vacuum box (20); the first connecting pins (43) and the top plate (41) are clearance-matched; a plurality of the second connecting pins (45) penetrate downward from the upper side of the top plate (41), and then pass through the bottom plate (42) to have their lower ends connected to the top of the hanging unit (50); and the second connecting pins (45) and the bottom plate (42) are clearance-matched; The hoisting unit (50) comprises an upper support plate (51), a lower support plate (52), and support rods (53); the upper support plate (51) is connected to the second connecting pin (45) of the weighing unit (40); the lower support plate (52) is located at the lower side of the upper support plate (51) and close to the inner bottom wall of the vacuum box (20); a plurality of support rods (53) are installed between the upper support plate (51) and the lower support plate (52) to form a support space for accommodating the shaping unit (60); The shaping unit (60) comprises two shaping plates (61) arranged at intervals in the longitudinal direction. The upper and lower ends of the shaping plate (61) are respectively installed with guide slide groups (63). Guide slide rails (62) are respectively installed on the side opposite to the upper support plate (51) and the lower support plate (52) of the hanging unit (50). The shaping plate (61) is installed on the guide slide rails (62) through the guide slide groups (63). The shaping plates (61) on both sides are driven by the execution structure so that the shaping plates (61) on both sides perform linear motion towards or away from each other. The shaping plate (61) is provided with a vent hole (611). The upper end of the shaping plate (61) is provided with an arc plate (612). The airbag outlet (38) of the feeding unit (30) is located between the arc plates (612) on both sides. When the shaping plates (61) on both sides move towards each other, the arc plates (612) on both sides can simultaneously press the airbag outlet (38). The execution structure comprises a rotating seat (64), a rotating shaft (65), a swing rod (66), a rotating arm (68), and a shaping cylinder (69). The rotating seat (64) is respectively fixedly mounted on the side of the upper support plate (51) and the lower support plate (52) of the lifting unit (50). The rotating shaft (65) is rotatably mounted in the rotating seat (64). The swing rod (66) is mounted on one end of the rotating shaft (65) located on the shaping plate (61). The shaping plate (61) is provided with an articulated seat (67) on one side corresponding to the swing rod (66). The middle part of the swing rod (66) is fixedly connected to the rotating shaft (65), and the two ends are respectively articulated to the articulated seats (67) of the shaping plates (61) on both sides. The other end of the rotating shaft (65) is respectively A rotating arm (68) is extended outward and fixedly installed, the cylinder end of the shaping cylinder (69) is hinged to the lifting unit (50), and the piston rod end is hinged to the rotating arm (68). The piston rod of the shaping cylinder (69) is extended to drive the shaping plates (61) on both sides to move synchronously closer to each other; the upper and lower ends of the shaping plates (61) on both sides are respectively and correspondingly installed with a locking cylinder (613) and a locking plate (614), one end of the locking plate (614) is fixedly connected to one side of the shaping plate (61), and the other end extends to one side of the locking cylinder (613), and a circular hole is provided on the locking plate (614), and the piston rod of the locking cylinder (613) extends out and penetrates into the circular hole of the locking plate (614), thereby limiting the shaping plates (61) on both sides during packaging.

2. A multifunctional packaging machine for fumed silica packaging according to claim 1, Features: The longitudinal cross-section of the opening and closing door (21) is triangular, and the longitudinal cross-section of the fixed side of the vacuum box (20) is also triangular. The hypotenuse side of the opening and closing door (21) and the hypotenuse side of the fixed side of the vacuum box (20) can be sealed and combined to form a box structure. The straight side of the fixed side of the vacuum box (20) is provided with at least two fixed arms (25), and the straight side of the opening and closing door (21) is provided with a hinged arm (26) corresponding to the fixed arm (25). One end of the hinged arm (26) is fixedly connected to the opening and closing door (21), the middle part is hinged to the fixed arm (25), and the other end is hinged to the piston rod end of the opening and closing door cylinder (27). The cylinder end of the opening and closing door cylinder (27) is hinged to the frame (10) or the fixed side of the vacuum box (20).

3. A multifunctional packaging machine for fumed silica packaging according to claim 2, Features: The vacuum box (20) is also provided with a vacuum valve (22), a vacuum breaking valve (23), a dust removal valve (24) and a vacuum pressure switch gauge (29); the vacuum breaking valve (23) and the vacuum pressure switch gauge (29) form an interlocking system to automatically control the vacuum pressure inside the vacuum box (20).

4. A multifunctional packaging machine for packaging fumed silica according to claim 3, Features: The feeding unit (30) comprises a first three-way joint (31), a spiral feeding valve (32), a first feeding valve (33), an air intake valve (34), a second feeding valve (35), a second three-way joint (36), a feeding main valve (37) and an air bag outlet (38), wherein the upper interface of the first three-way joint (31) is used to connect to a feeding conveying screw, the lower interface of the first three-way joint (31) is connected to one end of the spiral feeding valve (32), the other end of the spiral feeding valve (32) is connected to one end of the first feeding valve (33), and the other end of the first feeding valve (33) is connected to one end of the second three-way joint (36). One end of the second three-way joint (36) away from the first feed valve (33) is connected to one end of the main feed valve (37), and the other end of the main feed valve (37) is communicated with the airbag discharge port (38). The side interface of the first three-way joint (31) is connected to one end of the second feed valve (35), and the other end of the second feed valve (35) is communicated with the side interface of the second three-way joint (36). The airbag discharge port (38) is installed inside the vacuum box (20), the main feed valve (37) is communicated with the airbag discharge port (38) through a pipeline, and the air intake valve (34) is installed on the pipeline between the first feed valve (33) and the spiral feed valve (32).

5. A multifunctional packaging machine for packaging fumed silica according to claim 4, Features: The hoisting unit (50) is further provided with a rotating wheel group (70), which is located between the shaping plates (61) on both sides of the shaping unit (60) and is used to lift the packaging bag. The rotating wheel group (70) comprises a support frame (71) and a roller (72), wherein the support frame (71) is mounted on the upper side of the lower support plate (52) of the hoisting unit (50), and the roller (72) is rotatably mounted on the support frame (71).

6. A method for packaging silica using the multifunctional packaging machine for fumed silica packaging as claimed in claim 5, Features: The following steps are involved: S1. Open the door (21) of the vacuum box (20), place the packaging bag for filling the silicon dioxide powder between the shaping plates (61) on both sides of the shaping unit (60), insert the feeding port of the packaging bag into the airbag outlet (38) of the feeding unit (30), and inflate the airbag on the airbag outlet (38) to fix the packaging bag; S2. The piston rod of the shaping cylinder (69) extends to drive the shaping plates (61) on both sides to move closer to each other, and at the same time, the arc-shaped plates (612) on the upper ends of the shaping plates (61) on both sides press the packaging bag on the airbag outlet (38); at the same time, the piston rod of the locking cylinder (613) extends and penetrates into the circular hole of the locking plate (614); S3. Close the opening and closing door (21), open the vacuum valve (22), and evacuate the vacuum box (20) through the vacuum device until the vacuum degree in the vacuum box (20) reaches 0.5~0.8kg / cm 2 Start filling after negative pressure; S4. Rapid filling stage: before filling, the spiral feed valve (32), the first feed valve (33), the air intake valve (34), and the second feed valve (35) are opened, and then the main feed valve (37) is opened. At this time, the powder is quickly sucked into the packaging bag in the vacuum box (20) through the two pipes under the action of vacuum. When the weighing sensor (44) of the weighing unit (40) detects that the powder in the packaging bag has reached 95% of the target weight, fine feeding is performed; S5. Fine feeding stage: At this time, the second feeding valve (35) is closed, and the powder in the first three-way joint (31) is fed only through the spiral feeding valve (32). At this time, the filling speed is determined by the feeding speed of the spiral feeding valve (32), and the filling speed is effectively controlled when approaching the target weight, so as to achieve precise quantitative control. When the target weight is reached, the vacuum valve (22) and the main feeding valve (37) are closed; S6. Retrieving stage: the vacuum breaking valve (23) is opened, so that the air pressure in the vacuum box (20) is balanced with the outside, the door opening and closing cylinder (27) is ventilated, the piston rod is retracted, the opening and closing door (21) is opened, the dust removal valve (24) is opened, and the vacuum box (20) is subjected to negative pressure dust removal by an external dust removal device; S7. Package removal: The airbag on the airbag outlet (38) is deflated, and the feed port of the packaging bag is removed from the airbag outlet (38). The shaping cylinder (69) is activated to drive the swing rod (66) to rotate, thereby pushing the shaping plates (61) on both sides away from each other, and the silica package falls onto the rotating wheel set (70). The rotating wheel set (70) is connected to the conveyor belt of the next process, thereby moving the silica package out of the vacuum box (20).

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