Polyethylene wax powder automatic filling equipment and method

Abstract

The application discloses a kind of polyethylene wax powder automatic filling equipment and method, it is related to polyethylene wax powder technical field, including the platform for placing storage bag and the bunker for storing wax powder, quantitative cylinder is installed at the bottom of bunker, quantitative cylinder top is provided with feed inlet, quantitative cylinder inside includes upper and lower corresponding and communicating storage cavity and circular groove, the bottom surface of storage cavity is conical surface;Circular groove corresponds the center position of storage cavity and is vertically slidably installed with feed pipe in circular groove, the outer wall of feed pipe is attached with the surface of circular groove;Storage cavity is fixedly installed with the cover plate matched with the top surface of feed pipe by a plurality of connecting rods;Control mechanism is used to control the axial lifting of feed pipe along circular groove.When filling is carried out using the polyethylene wax powder automatic filling equipment provided by the application, the drifting wax powder generated by the impact of the falling wax powder and the accumulated wax powder in the bag will only be in the feed pipe, will not overflow the feed pipe, and will not overflow from the bag opening and the feed pipe.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of polyethylene wax powder, in particular to an automatic filling equipment and method for polyethylene wax powder. BACKGROUND

[0002] Polyethylene wax powder is a powder particle with a particle size of less than 10 microns, an appearance of white or light yellow, a relative molecular mass of about 1000-4000, and a melting point of about 95℃. It has the advantages of low toxicity, non-corrosiveness, high hardness, high softening point, low melt viscosity, wear resistance, heat resistance, and good lubricity, dispersibility, and flowability. Polyethylene wax powder is widely used in coatings, printing inks, and other types of chemicals, playing a role in scratch resistance, anti-blocking, wear resistance, and improving the smooth feel. After production, polyethylene wax powder needs to be filled into bags for storage and transportation. The initial filling method is manual filling, which is not only low in efficiency and poor in accuracy, but also easy to cause diseases in operators due to long-term inhalation of wax powder. There have been some researches on automatic filling equipment for polyethylene wax powder in the prior art.

[0003] For example, a kind of automatic bagging machine for polyethylene wax powder is disclosed in Chinese patent application No. CN202110878262.8, which comprises: a device body, a conveying belt arranged below the device body, and a feeding device arranged on the upper part of the device body; the lower bottom surface of the device body is fixed with four adjustable supporting legs, and a weighing and packaging device is arranged in the device body; after the material enters the device body from the feeding device, the automatic packaging work is completed after weighing and packaging by the weighing and packaging device.

[0004] For another example, a kind of automatic filling equipment for polyethylene wax powder is disclosed in Chinese patent application No. CN202111169136.1, which comprises a work platform, a feeding device, a packaging and transporting part, a packaging and sealing part, and a supporting frame; the work platform is rotatably arranged on the upper end of the supporting frame, and a plurality of workstations are arranged on the work platform; the feeding device is suitable for storing polyethylene wax powder and can quantitatively inject the material into the packaging bottle; the packaging and transporting part is suitable for conveying the feeding and discharging of the packaging bottle; and the packaging and sealing part is suitable for sealing the packaging bottle; after the packaging bottle is conveyed to the work platform by the packaging and transporting part, the material is injected into the packaging bottle from the feeding device, and the filling work is completed after the packaging and sealing device is sealed.

[0005] In fact, due to the small particle size of the wax powder, it is easy to float with the air; whether it is the filling device disclosed in the above patent or other filling devices in the prior art, there is a problem of flying wax powder in the rapid filling process; that is, the wax powder falling rapidly during filling will collide with the accumulated wax powder in the packaging bag and generate an upward airflow, and the wax powder will quickly float to the bag opening under the action of the airflow and overflow from the bag opening; at present, a filter screen can only be installed between the bag opening and the material conveying pipeline, but due to the small particle size of the wax powder, the filtering effect of the filter screen is limited, and the filter screen will affect the exhaust of air in the bag, which is not conducive to the rapid filling of the wax powder. Based on this, how to avoid the overflow of the wax powder from the bag opening during the rapid filling process has become a technical problem to be solved by those skilled in the art. SUMMARY

[0006] The purpose of the present application is to provide an automatic filling device and method for polyethylene wax powder to solve the above-mentioned deficiencies in the prior art.

[0007] In order to achieve the above-mentioned purpose, the present application provides the following technical scheme: an automatic filling device for polyethylene wax powder, comprising a platform for placing a storage bag and a hopper for storing wax powder, the hopper being located above the platform and fixed relative to the platform; a dosing cylinder is installed at the bottom of the hopper, the top of the dosing cylinder is provided with a feeding port, and the inside of the dosing cylinder comprises a storage cavity and a circular groove corresponding to and communicating with each other, the bottom surface of the storage cavity is a conical surface; a material conveying pipe is vertically and slidingly installed in the circular groove corresponding to the center position of the storage cavity; a cover plate cooperating with the top surface of the material conveying pipe is fixedly installed in the storage cavity through a plurality of connecting rods.

[0008] A control mechanism is used to control the axial lifting of the material conveying pipe along the circular groove.

[0009] As a preferred technical scheme of the present application, the control mechanism comprises a winding cylinder installed on the outer wall of the dosing cylinder, the winding cylinder is controlled by a motor, and a pull wire is fixedly connected to the winding cylinder, one end of the pull wire penetrates through the dosing cylinder and is fixedly connected to the top surface of the material conveying pipe.

[0010] As a preferred technical scheme of the present application, a sliding plate for closing the feeding port is slidingly installed on the dosing cylinder corresponding to the position of the feeding port.

[0011] As a preferred technical scheme of the present application, a first annular groove coaxial with the surface of the circular groove is formed on the surface of the circular groove, a second annular groove coaxial with the upper end surface of the first annular groove is formed on the upper end surface of the first annular groove, and a compression ring is slidingly installed in the second annular groove along the axial direction of the second annular groove.

[0012] As a preferred technical scheme of the present application, the top surface of the extrusion ring is connected with the second annular groove through an elastic spring, and the top surface of the extrusion ring is fixedly installed with a wedge-shaped block; a slide rod is horizontally and slidingly installed on the inner wall of the circular groove at a position corresponding to the wedge-shaped block, one end of the slide rod is attached to the inclined surface of the wedge-shaped block, and the other end of the wedge-shaped block is a hemispherical surface.

[0013] As a preferred technical scheme of the present application, the bottom end of the material conveying pipe is rotatably installed with a circular ring coaxial with the material conveying pipe, a circular shaft coaxial with the material conveying pipe is fixedly installed on the inner wall of the circular ring through a plurality of connecting rods, a plurality of material uniformizing rods are uniformly and fixedly installed on the circular shaft at a position below the material conveying pipe along the circumferential direction of the circular shaft, and a plurality of blades are uniformly and fixedly installed on the circular shaft at a position inside the material conveying pipe along the circumferential direction of the circular shaft.

[0014] As a preferred technical scheme of the present application, a plurality of rolling balls rolling with the material conveying pipe are uniformly installed on the circular ring along the circumferential direction of the circular ring.

[0015] As a preferred technical scheme of the present application, a plurality of air vents are formed on the inner wall of the material storage cavity at a position close to the top surface of the material storage cavity, the plurality of air vents are uniformly arranged along the circumferential direction of the material storage cavity; a sealing strip for sealing the air vents is movably installed on the inner wall of the material storage cavity at a position corresponding to each air vent, and the sealing strips are fixedly connected through a connecting ring.

[0016] As a preferred technical scheme of the present application, the sealing strip and the connecting ring are attached to the inner wall of the material storage cavity, the sealing strip is in a vertical state and is horizontally slidingly matched with the inner wall of the material storage cavity; an arc-shaped piece is fixedly installed on the inner wall of the material storage cavity, a first elastic pull rope is connected between the arc-shaped piece and the sealing strip; a second non-elastic pull rope is fixedly installed on the end surface of the sliding plate away from the feeding port, one end of the second non-elastic pull rope penetrates through one of the air vents and is fixedly connected to the sealing strip corresponding to the air vent.

[0017] The present application also provides an automatic polyethylene wax powder filling method, which is completed by using the above-mentioned automatic polyethylene wax powder filling device.

[0018] In the technical scheme, the polyethylene wax powder automatic filling equipment provided by the application can slide the material conveying pipe conveying the wax powder into the packaging bag up and down; in the initial stage of filling, the bottom end of the material conveying pipe is close to the bottom of the packaging bag, and as the filling proceeds, the wax powder continuously falls into the packaging bag along the material conveying pipe under the action of gravity, and the material conveying pipe also continuously rises, so that the distance between the bottom surface of the material conveying pipe and the plane of the accumulated wax powder in the bag is always in a relatively stable state; in this way, even if the wax powder falls rapidly, the scattered wax powder generated by the impact between the falling wax powder and the accumulated wax powder in the bag will only be in the material conveying pipe, and will not overflow the material conveying pipe, and the accumulated wax powder in the bag will not affect the rapid falling of the wax powder in the material conveying pipe; on the basis of the above beneficial effects of the equipment, the filling method using the equipment also has the above beneficial effects. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art based on these drawings.

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the polyethylene wax powder automatic filling equipment in embodiment 1.

[0021] Figure 2 It is a schematic diagram of the first state of the dosing cylinder and the material conveying pipe in embodiment 1.

[0022] Figure 3 It is a schematic diagram of the second state of the dosing cylinder and the material conveying pipe in embodiment 1. Figure 2

[0023] Figure 4

[0024] Figure 5 It is a schematic diagram of the third state of the dosing cylinder and the material conveying pipe in embodiment 1. Figure 4

[0025] Figure 6

[0026] Figure 7 It is a first schematic diagram of the three-dimensional structure of the material uniformizing unit in embodiment 2.

[0027] Figure 8 It is a second schematic diagram of the three-dimensional structure of the material uniformizing unit in embodiment 2.

[0028] Figure 9 It is a partial structure sectional view of the material uniformizing unit in embodiment 2. ​​​​

[0029] Figure 10 Schematic diagram of internal structure of the dosing cylinder in Example 3;

[0030] Figure 11 For Figure 10 Enlarged schematic diagram at C in the middle;

[0031] Figure 12 Schematic diagram of the perspective structure of the sealing strip and the connecting ring in Example 3;

[0032] Figure 13 Schematic diagram of the partial sectional structure top view at the air vent in Example 3;

[0033] Figure 14 Schematic diagram of the working process of the material conveying pipe in the embodiment of the present application.

[0034] Explanation of reference signs:

[0035] 1, platform; 2, hopper; 3, dosing cylinder; 301, feed inlet; 302, storage cavity; 303, circular groove; 304, first annular groove; 305, second annular groove; 306, air vent; 4, material conveying pipe; 5, cover plate; 6, control mechanism; 601, winding cylinder; 602, motor; 603, pull wire; 7, sliding plate; 8, extrusion ring; 9, extension spring; 10, wedge block; 11, sliding rod; 12, circular ring; 13, circular shaft; 14, material uniformizing rod; 15, blade; 16, ball bearing; 17, sealing strip; 18, connecting ring; 19, arc-shaped piece; 20, first pull rope; 21, second pull rope. DETAILED DESCRIPTION

[0036] In order to make the skilled in the art better understand the technical solutions of the present application, the present application will be further described in detail below in conjunction with the drawings. EMBODIMENT

[0037] As Figure 1As shown, this embodiment provides an automatic polyethylene wax powder filling device, including a platform 1 for placing storage bags and a hopper 2 for storing wax powder. The hopper 2 is fixedly connected above the platform 1 by several support columns. Several bag-opening devices for opening the bag opening are installed on the platform 1. Each bag-opening device includes a vertical plate fixedly installed on the platform 1, and a horizontal hydraulic rod fixedly installed on the vertical plate. The telescopic end of the hydraulic rod is fixedly installed with a hook that contacts the inner wall of the bag opening. The operator places an empty bag on the platform 1 and puts the bag opening onto each hook. Each hydraulic cylinder retracts horizontally, which opens the bag opening through the hooks. After the operator releases the bag, the bag can be in a stable suspended state under the action of internal support force (static friction). It should be noted that the bag-opening device is existing technology, and its structure is not limited to the structure described in this embodiment. As long as it can open the bag opening and keep the bag in a suspended state, it is acceptable.

[0038] like Figure 1 , Figure 2 and Figure 4 As shown, a metering cylinder 3 is installed at the bottom of the silo 2. A feed inlet 301 is opened at the top of the metering cylinder 3. A sliding plate 7 for closing the feed inlet 301 is slidably installed on the metering cylinder 3 at the position corresponding to the feed inlet 301. The driving method of the sliding plate 7 includes, but is not limited to, electric control. There are two sliding plates 7. When the two sliding plates 7 are in contact, the feed inlet 301 is in a closed state. When the two sliding plates 7 are separated, the feed inlet 301 is open. The inside of the metering cylinder 3 includes a storage cavity 302 and a circular groove 303 that are corresponding and connected vertically. The bottom surface of the storage cavity 302 is a conical surface. A conveying pipe 4 is vertically slidably installed in the circular groove 303 at the center position of the storage cavity 302. A cover plate 5 that cooperates with the top surface of the conveying pipe 4 is fixedly installed in the storage cavity 302 through several connecting rods.

[0039] The hopper 2 has a top-opening structure and stores wax powder inside; with the inlet 301 closed, the wax powder in the hopper 2 will not fall into the storage chamber 302; when the conveying pipe 4 is at the top of its stroke ( Figure 2 In the state shown, its top surface is in contact with the bottom surface of the cover plate 5, and the wax powder outside the conveying pipe 4 cannot enter the inside of the conveying pipe 4; in this state, the two sliding plates 7 are separated, and the feed port 301 is opened. The wax powder in the hopper 2 will fall into the storage chamber 302 through the feed port 301 under the action of gravity and fill the storage chamber 302. During this process, the air in the storage chamber 302 overflows into the hopper 2.

[0040] It should be noted that when the conveying pipe 4 is at the top of its stroke, the amount of wax powder that can be loaded in the metering cylinder 3 is fixed. The amount of wax powder that can be loaded in the metering cylinder 3 when the conveying pipe 4 is at the top of its stroke is the amount of wax powder to be filled into the packaging bag. Therefore, the amount of wax powder filled each time is constant.

[0041] After the wax powder in hopper 2 falls into metering cylinder 3 and fills it, the two sliding plates 7 approach each other and eventually stick together under external force, closing the inlet 301. The wax powder in hopper 2 will no longer enter metering cylinder 3. At this time, the conveying pipe 4 descends rapidly, separating its top surface from the bottom surface of the cover plate 5, until the conveying pipe 4 reaches its lowest point. Figure 4 The material is kept in the state shown and maintained for a period of time. During this process, the wax powder in the storage chamber 302 (the wax powder above the plane where the top surface of the conveying pipe 4 is located) enters the interior of the conveying pipe 4 through the top of the conveying pipe 4 under the action of gravity, and continues to fall along the conveying pipe 4 under the action of gravity until it falls into the bottom of the packaging bag. It should be noted that the bottom layer of wax powder is far from the opening of the packaging bag, and the scattered wax powder generated by the impact with the bottom of the bag will not overflow the packaging bag. As the conveying pipe 4 remains at the bottom of its stroke, more and more wax powder accumulates in the packaging bag, and the plane of accumulated wax powder gradually rises above the bottom surface of the conveying pipe 4. Next Driven by external force, the conveying pipe 4 rises slowly, and the wax powder in the metering cylinder 3 falls continuously into the packaging bag through the conveying pipe 4. However, the bottom surface of the conveying pipe 4 is always below the plane of the accumulated wax powder in the bag. In actual operation, the distance between the plane of the accumulated wax powder and the bottom surface of the conveying pipe 4 is generally controlled at about 1 cm. In this way, the scattered wax powder generated after the rapidly falling wax powder in the conveying pipe 4 hits the accumulated wax powder will only exist in the conveying pipe 4 and will not overflow out of the conveying pipe 4, let alone overflow from the opening of the packaging bag. Moreover, the wax powder accumulated in the bag will not prevent the wax powder falling in the conveying pipe 4 from leaving the conveying pipe 4.

[0042] Specifically, such as Figure 14 As shown, the wax powder falling into the conveying pipe 4 will temporarily accumulate in the conveying pipe 4 after impacting the accumulated wax powder. As the conveying pipe 4 rises, the wax powder accumulated in the conveying pipe 4 will disperse to the surface of the accumulated wax powder in the packaging bag under the action of gravity. In summary, this embodiment changes the process of wax powder falling and impacting directly during traditional filling into a process of falling, impacting, accumulating and dispersing, thus avoiding the wax powder from drifting into the air inside the bag.

[0043] It should be noted that during the filling process in this embodiment, the air inside the packaging bag can overflow between the bag opening and the feed pipe 4, which is beneficial for rapid filling; since the air inside the packaging bag does not contain any floating wax powder, no wax powder will overflow from the packaging bag.

[0044] When the conveying pipe 4 is Figure 4 The lowest point shown rose to Figure 6 After reaching the indicated height, all the wax powder in the metering cylinder 3 enters the packaging bag through the conveying pipe 4, with the bottom surface of the conveying pipe 4 positioned above the surface of the accumulated wax powder inside the packaging bag. Then, under external force, the conveying pipe 4 continues to rise until it reaches its maximum travel point. Figure 2 At the indicated height, it finally came to rest.

[0045] As Figure 1 , Figure 2 and Figure 5 shown, the polyethylene wax powder automatic filling equipment in the embodiment further comprises a control mechanism 6, which is used to control the axial lifting of the feeding pipe 4 along the circular groove 303; the control mechanism 6 comprises a winding drum 601 installed on the outer wall of the dosing cylinder 3, the winding drum 601 is controlled by a motor 602, and the winding drum 601 is fixedly connected with a non-stretchable and smooth surface pull wire 603, one end of the pull wire 603 penetrates through the dosing cylinder 3 and is fixedly connected to the top surface of the feeding pipe 4; the fixed connection mode of the pull wire 603 and the feeding pipe 4 is various, including but not limited to adhesive connection.

[0046] Specifically, the number of the winding drums 601 is four, and the four winding drums 601 are uniformly arranged along the circumference of the dosing cylinder 3; the motor 602 can drive the winding drum 601 to slowly rotate forward by a fixed number of turns, and can drive the winding drum 601 to quickly rotate reversely by a fixed number of turns; Figure 2 In this state, the pull wire 603 is in a tension state, the pull wire 603 holds the feeding pipe 4, so that the feeding pipe 4 will not move downward under the action of gravity, and the pull wire 603 is clamped by the feeding pipe 4 and the cover plate 5 (since the pull wire 603 is very thin, the gap between the feeding pipe 4 and the cover plate 5 can be ignored, and the wax powder will not enter the feeding pipe 4 through the gap); when the motor 602 drives the winding drum 601 to quickly rotate reversely, the pull wire 603 tends to be relaxed, the feeding pipe 4 quickly descends from the highest point under the action of gravity, and always pulls the pull wire 603 which tends to be relaxed tight, and the feeding pipe 4 also reaches the lowest point of the stroke when the winding drum 601 stops rotating; then, the motor 602 drives the winding drum 601 to slowly rotate forward, the winding drum 601 winds the pull wire 603 in the tension state, and the pull wire 603 also pulls the feeding pipe 4 to slowly rise from the lowest point of the stroke; the feeding pipe 4 rises from the position shown in Figure 4 to the position shown in Figure 6 , and finally rises to the position shown in Figure 2 ; it should be noted that during the lifting of the feeding pipe 4, the pull wire 603 will slide on the inner wall of the storage cavity 302, but since the wax powder has the effect of reducing friction, the friction on the pull wire 603 is very small and will not affect its strength.

[0047] In the embodiment, in order to ensure that the feeding pipe 4 can smoothly ascend and descend along the circular groove 303, the outer wall of the feeding pipe 4 and the surface of the circular groove 303 are in clearance fit, which requires that the circular groove 303 be sealed to ensure that the wax powder will not overflow from the circular groove 303 and the feeding pipe 4 to the outside air, based on which, as Figure 3 and Figure 5As shown, a first annular groove 304 coaxial with the surface of the circular groove 303 is formed, and a second annular groove 305 coaxial with the surface of the upper end of the first annular groove 304 is formed. The second annular groove 305 is connected to the external air, and a compression ring 8 is slidably installed in the second annular groove 305 along its axial direction. The compression ring 8 can move up and down in the second annular groove 305 along its axial direction. When the compression ring 8 descends, it compresses the air in the first annular groove 304, and the air pressure in the first annular groove 304 increases. A telescopic spring 9 is connected between the top surface of the compression ring 8 and the second annular groove 305. A wedge block 10 is fixedly installed on the top surface of the compression ring 8. A slide rod 11 is horizontally slidably installed on the inner wall of the circular groove 303 corresponding to the position of the wedge block 10. One end of the slide rod 11 is in contact with the inclined surface of the wedge block 10, and the other end of the wedge block 10 is a hemispherical surface.

[0048] exist Figure 2 and Figure 3 In this state, the outer wall of the conveying pipe 4 applies a horizontal thrust to the slide rod 11, and the slide rod 11 applies a downward thrust to the wedge block 10, so that the wedge block 10 and the extrusion ring 8 are at the bottom of the lifting formation, and the telescopic spring 9 is in a stretched state. Since the air in the first annular groove 304 is compressed to a high pressure state at this time, the air outside the first annular groove 304 cannot enter its interior. The high pressure air in the first annular groove 304 will slowly leak outward along the gap between the conveying pipe 4 and the circular groove 303. Part of the air flows downward through the gap into the outside air, and part of the air flows upward to block the wax powder in the gap. The wax powder adhering to the outer wall of the conveying pipe 4 and entering the circular groove 303 cannot enter the first annular groove 304, so it will not overflow from the circular groove 303 and the conveying pipe 4 into the outside air. It should be noted that during the downward movement of the conveying pipe 4, the high pressure air in the first annular groove 304 will not completely return to the normal pressure state.

[0049] exist Figure 4 and Figure 5 In this state, the outer wall of the conveying pipe 4 separates from the slide rod 11. The originally stretched spring 9 contracts and returns to its original state, pulling the extrusion ring 8 back to its original position. The extrusion ring 8 returns to the top of its lifting stroke, and the air pressure in the first annular groove 304 suddenly decreases and enters a low-pressure state. External air will flow upward into the first annular groove 304 through the gap between the circular groove 303 and the conveying pipe 4. Although the gap between the circular groove 303 above the first annular groove 304 and the conveying pipe 4 is filled with wax powder (wax powder adhering to the outer wall of the conveying pipe 4), the wax powder will not enter the first annular groove 304 under the mutual extrusion state. As the conveying pipe 4 continues to rise, the first annular groove 304 enters a high-pressure state again. The wax powder in the gap between the circular groove 303 above the first annular groove 304 and the conveying pipe 4 is driven upward by the conveying pipe 4 and returns to the storage chamber 302.

[0050] In summary, in the initial stage of the descending of the feeding pipe 4, the air in the first annular groove 304 is in a high pressure state and is sent upward along the gap between the circular groove 303 and the feeding pipe 4, and the wax powder cannot enter the first annular groove 304, thereby avoiding the overflow of the wax powder from the circular groove 303; when the feeding pipe 4 descends to the bottom end of the stroke, the first annular groove 304 is compensated by air suction from the outside and returns to a normal pressure state; when the feeding pipe 4 ascends, the first annular groove 304 again enters a high pressure state. Embodiment

[0051] On the basis of the previous embodiment, the even feeding unit is added in the present embodiment, which is used to spread the surface of the accumulated wax powder in the packaging bag, so as to avoid the formation of a cone-shaped surface of the accumulated wax powder, thereby avoiding the situation that part of the wax powder exceeds the bag opening when the bagging is about to end; on the other hand, the bottom surface of the feeding pipe 4 is always buried below the surface of the accumulated wax powder.

[0052] Specifically, as shown in Figs. Figure 7 , Figure 8 and Figure 9 , the bottom end of the feeding pipe 4 is rotatably installed with a coaxial circular ring 12, the inner wall of the circular ring 12 is fixedly installed with a coaxial circular shaft 13 through a plurality of connecting rods, a plurality of even feeding rods 14 are uniformly fixedly installed on the circular shaft 13 at a position below the feeding pipe 4 along the circumferential direction thereof, and a plurality of blades 15 are uniformly fixedly installed on the circular shaft 13 at a position in the feeding pipe 4 along the circumferential direction thereof; a plurality of rolling balls 16 that rollingly cooperate with the feeding pipe 4 are uniformly installed on the circular ring 12 along the circumferential direction thereof, so as to reduce the friction between the circular ring 12 and the feeding pipe 4.

[0053] After the wax powder in the storage cavity 302 enters the feeding pipe 4, it rapidly falls down, and in the falling process, the wax powder collides with the blades 15 to apply a pushing force to the blades 15, so that the blades 15 collide with the wax powder, which is beneficial to the dispersion of the wax powder and avoids the caking of the wax powder; the blades 15 are driven to rotate by the pushing force of the wax powder, the circular shaft 13 is driven to rotate by the blades 15, and the even feeding rods 14 are driven to rotate by the circular shaft 13; the rotating even feeding rods 14 spread the surface of the accumulated wax powder in the packaging bag, so that the surface of the accumulated wax powder is close to the horizontal plane.

[0054] It should be noted that the circular ring 12, the circular shaft 13 and the even feeding rods 14 in the present embodiment are all hollow structures made of light materials, which can rotate under a small external force. Embodiment

[0055] On the basis of the previous embodiment, the embodiment ventilates the storage cavity 302, so that the wax powder in the storage cavity 302 can enter the packaging bag through the feeding pipe 4 more quickly. In addition, in a large production workshop, a dehumidification system is generally provided, and the wax powder is not easy to absorb moisture; however, in some small processing plants, the dehumidification equipment is not equipped in place, and the wax powder may absorb moisture, causing a small amount of wax powder to adhere to the inner wall of the storage cavity 302. The embodiment also solves this problem.

[0056] Specifically as shown in Figure 10 、 Figure 11 and Figure 12 , a plurality of ventilation holes 306 are arranged on the inner wall of the storage cavity 302 close to the top surface thereof, and the plurality of ventilation holes 306 are uniformly arranged along the circumference of the storage cavity 302; the inner wall of the storage cavity 302 is movably provided with a sealing strip 17 corresponding to each ventilation hole 306 for sealing the ventilation hole 306, and each sealing strip 17 is fixedly connected through a connecting ring 18.

[0057] Specifically, when the two sliding plates 7 are separated, the wax powder in the hopper 2 falls into the storage cavity 302 through the feeding port 301, and each sealing strip 17 closes the corresponding ventilation hole 306, so that the ventilation hole 306 is in a closed state, and the wax powder will not overflow through the ventilation hole 306; when the two sliding plates 7 are attached, the feeding port 301 is closed, the connecting ring 18 and each sealing strip 17 are synchronously translated, at this time each ventilation hole 306 is opened, and external air can enter the storage cavity 302 through the ventilation hole 306, thereby facilitating the wax powder in the storage cavity 302 to enter the feeding pipe 4 under the action of gravity; at the same time, a small amount of wax powder adhering to the inner wall of the storage cavity 302 is scraped off during the translation of the sealing strip 17, and the wax powder adhering to the surface of the sealing strip 17 is also shaken off during the reciprocating translation of the sealing strip 17.

[0058] As shown in Figure 10 、 Figure 11 and Figure 13 , the sealing strip 17 and the connecting ring 18 are attached to the inner wall of the storage cavity 302, the sealing strip 17 is in a vertical state and is in horizontal sliding cooperation with the inner wall of the storage cavity 302; an arc-shaped sheet 19 is fixedly installed on the inner wall of the storage cavity 302, and a first elastic pull rope 20 is connected between the arc-shaped sheet 19 and the sealing strip 17; a second non-elastic pull rope 21 is fixedly installed on the end surface of the sliding plate 7 away from the feeding port 301, and one end of the second pull rope 21 penetrates through one of the ventilation holes 306 and is fixedly connected to the sealing strip 17 corresponding to the ventilation hole 306.

[0059] As can be seen from Figure 13 , the connection between the second pull rope 21 and the sealing strip 17 is located at the position close to the ventilation hole 306 on one side of the sealing strip 17, that is, when the second pull rope 21 in the tension state is pulled upward, the second pull rope 21 will drive the sealing strip 17 to translate.

[0060] Figure 10 In the current state, the second pull rope 21 is in a relaxed state. As the two sliding plates 7 approach each other and eventually come into contact, the second pull rope 21 is gradually tightened and eventually reaches a taut state. In the taut state, the second pull rope 21 is subjected to an upward pulling force, which causes the sealing strip 17 to move horizontally. The connecting ring 18 and the remaining sealing strips 17 move horizontally in an arc simultaneously, and each vent hole 306 is opened, and the first pull rope 20 is stretched. When the two sliding plates 7 move away from each other, the second pull rope 21 tends to relax, the first pull rope 20 returns to its original state and pulls the corresponding sealing strip 17 to move in the opposite direction to reset. The connecting ring 18 and the remaining sealing strips 17 move horizontally to reset simultaneously, and each vent hole 306 is closed.

[0061] This embodiment provides an automatic filling method for polyethylene wax powder:

[0062] Step 1: Material conveying pipe 4 is in Figure 2 As shown, the operator places the packaging bag on platform 1 and uses the existing bag-holding equipment to open the bag opening and keep the packaging bag suspended in the air.

[0063] Step 2: The material conveying pipe 4 descends rapidly under its own weight to... Figure 4 The state shown;

[0064] Step 3: The control mechanism 6 drives the conveying pipe 4 to slowly rise to... Figure 2 As shown, the operator can simply tie the packaging bag closed and remove platform 1.

[0065] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An automatic filling device for polyethylene wax powder, comprising a platform (1) for placing storage bags and a hopper (2) for storing wax powder, characterized in that, The hopper (2) is located above the platform (1) and fixed relative to the platform (1); a metering cylinder (3) is installed at the bottom of the hopper (2), and a feed inlet (301) is opened at the top of the metering cylinder (3). The inside of the metering cylinder (3) includes a storage chamber (302) and a circular groove (303) that are corresponding and connected. The bottom surface of the storage chamber (302) is a conical surface; the circular groove (303) corresponds to the center position of the storage chamber (302) and a conveying pipe (4) is vertically slidably installed in the circular groove (303); a cover plate (5) that matches the top surface of the conveying pipe (4) is fixedly installed in the storage chamber (302) through several connecting rods. A control mechanism (6) is used to control the conveying pipe (4) to move up and down axially along the circular groove (303); the control mechanism (6) includes a winding drum (601) installed on the outer wall of the metering cylinder (3), the winding drum (601) is controlled by a motor (602), a pull wire (603) is fixedly connected to the winding drum (601), one end of the pull wire (603) passes through the metering cylinder (3) and is fixedly connected to the top surface of the conveying pipe (4); a sliding plate (7) for closing the inlet (301) is slidably installed on the metering cylinder (3) at the position corresponding to the feed inlet (301); The surface of the circular groove (303) is provided with a first annular groove (304) coaxial with it, and the upper end face of the first annular groove (304) is provided with a second annular groove (305) coaxial with it. A compression ring (8) is slidably installed in the second annular groove (305) along its axial direction. A telescopic spring (9) is connected between the top surface of the compression ring (8) and the second annular groove (305). A wedge block (10) is fixedly installed on the top surface of the compression ring (8). A sliding rod (11) is horizontally slidably installed on the inner wall of the circular groove (303) corresponding to the position of the wedge block (10). One end of the sliding rod (11) is in contact with the inclined surface of the wedge block (10), and the other end of the wedge block (10) is a hemispherical surface.

2. The automatic polyethylene wax powder filling equipment according to claim 1, characterized in that, The bottom end of the conveying pipe (4) is rotatably mounted with a ring (12) coaxial with it. A circular shaft (13) coaxial with the conveying pipe (4) is fixedly mounted on the inner wall of the ring (12) by several connecting rods. Several material leveling rods (14) are evenly fixedly mounted on the circular shaft (13) at a position below the conveying pipe (4) along its circumference. Several blades (15) are evenly fixedly mounted on the circular shaft (13) at a position inside the conveying pipe (4) along its circumference.

3. The automatic polyethylene wax powder filling equipment according to claim 2, characterized in that, The ring (12) is uniformly equipped with several balls (16) that roll in cooperation with the conveying pipe (4) along its circumference.

4. The automatic polyethylene wax powder filling equipment according to claim 3, characterized in that, Several vent holes (306) are provided on the inner wall of the storage cavity (302) near its top surface. The several vent holes (306) are evenly arranged around the circumference of the storage cavity (302). A sealing strip (17) for sealing the vent hole (306) is movably installed on the inner wall of the storage cavity (302) at the position corresponding to each vent hole (306). Each sealing strip (17) is fixedly connected by a connecting ring (18).

5. The automatic polyethylene wax powder filling equipment according to claim 4, characterized in that, The sealing strip (17) and the connecting ring (18) are both in contact with the inner wall of the storage cavity (302). The sealing strip (17) is vertical and slides horizontally with the inner wall of the storage cavity (302). An arc-shaped piece (19) is fixedly installed on the inner wall of the storage cavity (302). An elastic first pull rope (20) is connected between the arc-shaped piece (19) and the sealing strip (17). A non-elastic second pull rope (21) is fixedly installed on the end face of the sliding plate (7) away from the feed inlet (301). One end of the second pull rope (21) passes through one of the vent holes (306) and is fixedly connected to the sealing strip (17) corresponding to the vent hole (306).

6. An automatic filling method for polyethylene wax powder, characterized in that, The process is completed using the automatic polyethylene wax powder filling equipment described in any one of claims 1-5.

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