Packaging machine special for epoxy powder coating

Abstract

The invention relates to the technical field of powder conveying, and particularly discloses a packaging machine special for epoxy powder coating, which comprises a packaging machine body, a feeding cylinder is fixedly mounted on the packaging machine body through a support, a grinding cylinder is integrally formed at the bottom end of the feeding cylinder, and a material grinding assembly is arranged in the grinding cylinder. The bottom end of the grinding cylinder is fixedly connected with a conveying pipe, a spiral conveying part capable of rotating is arranged in the conveying pipe, and a discharging port is formed in the bottom end of the conveying pipe. In the process that epoxy powder is conveyed through the spiral conveying part, the cooling assembly is used for cooling the epoxy powder, namely the spiral conveying part, so that mechanical heat and friction heat in the spiral conveying part can be rapidly reduced, and the epoxy powder is prevented from being solidified in advance; and static electricity generated by friction between the powder during conveying can be reduced by reducing the heat of the epoxy powder, so that the dry powder is prevented from being adsorbed and agglomerated by the static electricity, and the quality of the product is ensured to meet the standard.

Description

Technical Field

[0001] The present invention relates to the technical field of powder conveying, and particularly to a special packaging machine for epoxy powder coatings. Background Art

[0002] Epoxy powder is a thermosetting and non-toxic solid powder coating, mainly composed of epoxy resin, curing agent, pigments, fillers, and additives, etc. It can effectively resist the erosion of acids, alkalis, solvents, and other chemical substances, and has strong wear resistance and adhesion. The coating is closely combined with the substrate and is mostly used for buried steel pipelines, coatings of buildings, waterproof materials, etc. Since epoxy powder may agglomerate or its performance may decline due to moisture absorption or contamination, during the transportation process, a screw conveyor with relatively high sealing performance is usually adopted for epoxy powder.

[0003] For example, Chinese Patent No. CN119059184B discloses an anti-sticking powder screw conveyor. The present invention relates to the technical field of screw conveyors, including a conveying cylinder for guiding and conveying powder materials. Both sides of the bottom of the conveying cylinder are fixedly installed with support frames, and a discharge pipe is opened at the bottom of the conveying cylinder; a screw stirring member for stirring and conveying sticky powder materials. The outer surface of the screw stirring member is fixedly installed with a motor, and the bottom of the motor is fixedly installed with a fixing frame. In this anti-sticking powder screw conveyor, after the powder materials are introduced into the guide ball, they slide down along the inner wall of the guide ball and slide onto the surface of the bending pad. At this time, the powder materials sliding down and impacting squeeze the bending pad, causing the bending arc piece to sink downward and abut against the inner squeezing piece. Thus, the powder materials are preliminarily buffered by the bending arc piece, preventing the powder materials from directly sliding and flushing into the conveying cylinder during introduction, resulting in the flying of toxic dust and harming the staff.

[0004] However, when using a screw conveyor to transport epoxy powder, since the conveying fins continuously rub against the powder during the transportation of the powder, a large amount of heat is generated on the surface of the fins in direct contact with the powder. At the same time, a large amount of mechanical heat is also generated when the main shaft of the screw conveyor rotates. Under the influence of various heats, the dry epoxy powder will cause its own premature curing and adhere to the surface of the fins. This will not only reduce the heat dissipation performance of the screw conveyor itself, cause a large amount of powder to agglomerate and cure, affecting normal transportation, but also cause a large amount of powder to remain in the conveyor, making the epoxy powder unable to enter the packaging bag, reducing the production quality of the product. Summary of the Invention

[0005] The purpose of the present invention is to provide a special packaging machine for epoxy powder coatings to solve at least one of the technical problems existing in the above-mentioned prior art.

[0006] To achieve the above object, the present invention provides the following technical solution: A special packaging machine for epoxy powder coatings, including a packaging body, on which a feeding cylinder is fixedly installed through a bracket. At the bottom end of the feeding cylinder, a grinding cylinder is integrally formed. Inside the grinding cylinder, there is a grinding assembly for grinding materials. At the bottom end of the grinding cylinder, a conveying pipe is fixedly connected. Inside the conveying pipe, there is a rotatable spiral conveying part. At the bottom end of the conveying pipe, there is a discharge port. Inside the packaging machine outside the discharge port, there is a packaging assembly for hermetically packaging the epoxy powder discharged through the discharge port;

[0007] It further includes a cooling assembly, which is used to cool the spiral conveying part.

[0008] Preferably, the spiral conveying part includes a transmission gear rotatably installed inside the packaging machine. Inside the packaging machine, there is also a driving gear meshing with the transmission gear, and the driving gear can be driven by an external driving structure. At the top end of the transmission gear, a rotating sleeve penetrating into the conveying pipe is fixedly installed. On the outer wall of the rotating sleeve, spiral fins are fixedly installed. The top end of the rotating sleeve is rotationally connected to the inner wall of the bottom end of the grinding cylinder through an axial card slot, and a blanking gap is formed between the inner wall of the rotating sleeve and the grinding cylinder.

[0009] Preferably, the cooling assembly includes a through groove opened at the top end of the rotating sleeve, and the through groove is communicated with a water supply device inside the packaging machine through a hose. Inside the rotating sleeve, a cooling cavity communicated with the through groove is opened. Inside the cooling cavity, a plurality of groups of cooling channels penetrating into the spiral fins are opened. The cooling cavity is communicated with a water recovery device through a pipeline buried inside the packaging machine.

[0010] Preferably, a plurality of fixed disks corresponding to the cooling channels one by one and having an outer diameter equal to the inner diameter of the cooling cavity are fixedly installed inside the cooling cavity. Inside the cooling channels, a slidably adjustable sliding plate is installed. One end of the sliding plate is fixedly installed with a piston plate, and the other end of the sliding plate is inserted into a circular groove opened inside the fixed disk. A flow groove is opened at one end of the sliding plate close to the piston plate.

[0011] Preferably, inside the packaging machine below the rotating sleeve, a rotatable central shaft is installed. A fixed sleeve fixedly installed inside the packaging machine is sleeved on the outer wall of the central shaft. The top ends of the fixed sleeve and the central shaft penetrate through a plurality of fixed disks and are rotationally connected to the inner top surface of the rotating sleeve. A plurality of rotating blocks located inside the circular grooves of the fixed disks are rotatably installed on the outer wall of the fixed sleeve. The rotating blocks are semicircular and have a height consistent with the height of the circular grooves. The rotating blocks are rotationally connected to the sliding plate through connecting rods;

[0012] It further includes a locking assembly, which is used to lock the central shaft and the rotating block to each other.

[0013] Preferably, the locking assembly includes a sliding pin slidably installed in a transverse groove formed inside the central shaft. An electromagnet is fixedly installed on the inner sidewall of the transverse groove, and a magnetic pole capable of repelling or attracting the electromagnet is provided on the sidewall of the sliding pin. A rotation groove for the sliding pin to rotate is formed on the outer wall of the fixed sleeve, and a through hole for the sliding pin to insert is formed on the sidewall of the rotating block. Temperature sensors are fixedly installed on the outer wall of the fixed sleeve between every two fixed disks, and each temperature sensor is electrically connected to the adjacent electromagnet.

[0014] Preferably, a through groove is formed on the sidewall of the piston plate, and a convex block capable of blocking the through groove is provided on the inner sidewall of the cooling flow channel.

[0015] Preferably, through holes corresponding to each other are formed on each fixed disk and the rotating block therein, and the through holes on adjacent fixed disks are symmetrically arranged about the central shaft as the center point.

[0016] Preferably, the maximum rotation angle of the rotating block and the sliding pin is 90 degrees.

[0017] Preferably, the spacing of the spiral fins gradually increases from top to bottom.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] First, during the process of transporting epoxy powder by the spiral conveying part of the present invention, the cooling component is used to cool the epoxy powder and the spiral conveying part. It can not only quickly reduce the mechanical heat and frictional heat in the spiral conveying part to prevent the epoxy powder from curing in advance, but also reduce the static electricity generated by the friction between the powders during transportation by reducing the heat of the epoxy powder, avoid the dry powders from being adsorbed and agglomerated with each other due to static electricity, and ensure that the quality of the product meets the standard.

[0020] Second, the present invention divides the cooling cavity into multiple cooling intervals by multiple groups of fixed disks, and makes the coolant enter the cooling flow channels along the cooling intervals, strengthening the cooling effect of the coolant on the spiral fins, which can increase the cooling effect on the epoxy powder. Moreover, by adjusting the sliding plate, the flow path of the coolant in the cooling flow channels can be increased or decreased, which can improve the cooling effect on the spiral fins without adding new cooling sources, and further ensure the production quality of the epoxy powder.

[0021] III. In the present invention, by allowing the coolant to enter the cooling flow for direct contact heat exchange with the spiral fins, the heat of the outer wall of the spiral fins in direct contact with the dry powder can be reduced, avoiding the influence of the accumulation of frictional heat and mechanical heat on the epoxy powder. Moreover, when the coolant in the rotating sleeve rotates with the rotating sleeve, it will continuously impact the inner wall of the rotating sleeve under the action of centrifugal force, causing the epoxy powder adhering to the outer wall of the rotating sleeve to fall under the action of vibration, avoiding the retention of epoxy powder in the conveying cylinder and resulting in uneven distribution of epoxy powder, which may cause errors in packaging weighing. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0023] Figure 2 is a three-dimensional structural sectional view of the present invention;

[0024] Figure 3 is a side structural sectional view of the present invention;

[0025] Figure 4 In the present invention Figure 3 is a partial enlarged view of part A;

[0026] Figure 5 is of the present invention Figure 4 is a comparison diagram after the sliding plate is adjusted;

[0027] Figure 6 is a sectional view of the rotating block and its related structure in the present invention;

[0028] Figure 7 is a three-dimensional structural schematic diagram of the rotating block and its related structure in the present invention;

[0029] Figure 8 is a partial sectional view of the rotating sleeve in the present invention;

[0030] Figure 9 is a flowchart of the operation of the present invention;

[0031] Figure 10 is a schematic diagram of the flow path of the coolant in the present invention.

[0032] In the figure: 1, packaging body; 2, feeding cylinder; 3, grinding cylinder; 4, conveying pipe; 5, driving gear; 6, driven gear; 7, rotating sleeve; 8, discharge port; 9, fixed sleeve; 10, central axis; 11, spiral fins; 12, fixed disk; 13, rotating block; 14, connecting rod; 15, sliding plate; 16, piston plate; 17, flow groove; 18, electromagnet; 19, sliding pin; 20, temperature sensor; 21, rotating groove; 22, cooling cavity; 23, cooling flow channel. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0034] Please refer to Figures 1 to 10 , the present invention provides a technical solution: a special packaging machine for epoxy powder coatings, including a packaging body 1. An inlet hopper 2 is fixedly installed on the packaging body 1 through a bracket. A grinding cylinder 3 is integrally formed at the bottom end of the inlet hopper 2. A grinding assembly for grinding materials is provided in the grinding cylinder 3. A conveying pipe 4 is fixedly connected to the bottom end of the grinding cylinder 3. A rotatable screw conveying part is provided in the conveying pipe 4. An outlet 8 is provided at the bottom end of the conveying pipe 4. A packaging assembly capable of hermetically packaging the epoxy powder discharged through the outlet 8 is provided in the packaging body 1 outside the outlet 8;

[0035] It further includes a cooling assembly for cooling the screw conveying part.

[0036] When the device is in use, first, epoxy resin, curing agent, pigment filler, and additives are weighed according to the formula ratio, pre-mixed, and the pre-mixed materials are melt-kneaded by a melt extruder. Subsequently, the cooled materials are cut into strips and divided into pieces, and the divided materials are put into the packaging body 1 from the inlet hopper 2. The materials are crushed into powder by the grinding assembly in the grinding cylinder 3. Then the powder enters the conveying pipe 4 and is quantitatively conveyed to the outlet 8 through the screw conveying part. An appropriate mass of epoxy powder is hermetically discharged into a packaging bag, and the bag mouth of the packaging bag is heat-sealed by a packaging machine. Subsequently, the packaged powder is secondarily packaged into a packaging barrel to complete the packaging of the epoxy powder. When the screw conveying part quantitatively conveys the powder, a large amount of mechanical heat and frictional heat will be generated, so that the epoxy powder may be prematurely cured due to heat accumulation during transportation and adhere to the inner wall of the screw conveying part. Therefore, when the screw conveying part conveys the epoxy powder, the cooling assembly cools the screw conveying part and the epoxy powder to ensure that the powder will not be prematurely cured and caked due to high heat.

[0037] In this way, during the process of conveying the epoxy powder through the screw conveying part, the cooling assembly cools the epoxy powder and the screw conveying part, which can not only quickly reduce the mechanical heat and frictional heat in the screw conveying part to avoid premature curing of the epoxy powder, but also reduce the static electricity generated by friction between the powders during conveying by reducing the heat of the epoxy powder, and avoid caking of the dry powders due to static electricity adsorption, ensuring that the quality of the product meets the standards.

[0038] Furthermore, the spiral conveying part includes a transmission gear 6 rotatably installed in the packaging body 1. An active gear 5 meshing with the transmission gear 6 is also rotatably installed in the packaging body 1, and the active gear 5 can be driven by an external driving structure. A rotating sleeve 7 penetrating into the conveying pipe 4 is fixedly installed at the top of the transmission gear 6. Spiral fins 11 are fixedly installed on the outer wall of the rotating sleeve 7. The top of the rotating sleeve 7 is rotatably connected to the inner wall of the bottom end of the grinding cylinder 3 through an axial card slot, and a blanking gap is formed between the inner wall of the rotating sleeve 7 and the grinding cylinder 3.

[0039] According to the above embodiment, a specific embodiment of the spiral conveying part is provided. Specifically, refer to Figure 3 , when an external driving source such as a motor drives the active gear 5 to rotate, the active gear 5 drives the transmission gear 6 and the rotating sleeve 7 to rotate together. At this time, the spiral fins 11 and the rotating sleeve 7 rotate together to convey the epoxy powder downward. At this time, a filter screen can be arranged at the top of the rotating sleeve 7 to screen the ground powder. Since the rotating sleeve 7 will generate a certain vibration during rotation, it can cooperate with the filter screen to vibrate and screen the powder. The axial card slot at the top of the rotating sleeve 7 can provide a certain stability for the rotating sleeve 7 and the conveying pipe 4.

[0040] Furthermore, the cooling component includes a through groove opened at the top of the rotating sleeve 7, and the through groove is communicated with a water supply device in the packaging body 1 through a hose. A cooling cavity 22 communicated with the through groove is opened in the rotating sleeve 7. A plurality of groups of cooling channels 23 penetrating into the spiral fins 11 are opened in the cooling cavity 22. The cooling cavity 22 is communicated with a water recovery device through a pipeline buried in the packaging body 1.

[0041] According to the above embodiment, a specific embodiment of the cooling component is provided. Specifically, refer to Figure 3 , when the liquid supply component supplies liquid to the top of the rotating sleeve 7 through a hose, since a plurality of groups of liquid infusion channels are opened at the top of the rotating sleeve 7, the rotating sleeve 7 can still maintain the liquid supply to the cooling cavity 22 during rotation. When the coolant enters the cooling cavity 22 through the transverse groove, it will enter the cooling channels 23 under the action of centrifugal force to cool and exchange heat with the spiral fins 11 around the cooling channels 23. Until the cooling cavity 22 is filled with coolant, the coolant is recovered by the water recovery device, and the liquid in the cooling cavity 22 and the cooling channels 23 circulates and exchanges heat to cool the rotating sleeve 7 and the spiral fins 11.

[0042] In this way, by allowing the coolant to enter the cooling channel 23 for direct contact heat exchange with the spiral fins 11, the heat of the outer wall of the spiral fins 11 in direct contact with the dry powder can be reduced, avoiding the influence of the accumulation of frictional heat and mechanical heat on the epoxy powder. Moreover, when the coolant in the rotating sleeve 7 rotates with the rotating sleeve 7, it will continuously impact the inner wall of the rotating sleeve 7 under the action of centrifugal force, causing the epoxy powder adhering to the outer wall of the rotating sleeve 7 to fall off under the action of vibration, avoiding the retention of epoxy powder in the conveying pipe 4 and causing uneven distribution of epoxy powder, resulting in errors in packaging weighing.

[0043] Further, a plurality of fixed plates 12 corresponding one-to-one to the cooling channels 23 and having an outer diameter equal to the inner diameter of the cooling chamber 22 are fixedly installed in the cooling chamber 22. A slidable adjustment sliding plate 15 is installed in the cooling channel 23. One end of the sliding plate 15 is fixedly installed with a piston plate 16, and the other end of the sliding plate 15 is inserted into a circular groove opened in the fixed plate 12. A flow groove 17 is opened at one end of the sliding plate 15 close to the piston plate 16.

[0044] According to the above-described embodiment, since the outer diameter of the fixed plate 12 is exactly the same as the inner diameter of the cooling chamber 22, the gaps between every two groups of fixed plates 12 are separated to form a plurality of cooling intervals (such as a1, b1, c1 shown in the figure). For details, see Figure 10 , when the coolant enters the cooling channel 23, since the sliding plate 15 divides the cooling channel 23 into two parts, at this time, the coolant will flow in the direction indicated by the dotted line, that is, it will bypass one week in the cooling channel 23 along the piston plate 16 and the flow groove 17 and flow into the next cooling interval. When the liquid supply flow rate of the liquid supply device remains unchanged, the flow rate of the coolant in the cooling channel 23 is increased, so that the heat exchange efficiency of the coolant with the spiral fins 11 is increased, improving the cooling effect of the cooling component on the spiral fins 11 and the external powder, further avoiding powder curing. Moreover, when the sliding plate 15 slides, it will change the circulation path of the coolant in the cooling channel 23. For example, in the a1 area, when the sliding plate 15 slides in the opposite direction to the piston plate 16, the flow path of the coolant in the cooling channel 23 is reduced, which will reduce the heat exchange of the coolant in this area. When the sliding plate 15 slides in the direction of the piston plate 16, the flow path of the coolant in the cooling channel 23 is increased, increasing the contact time between the coolant and the spiral fins 11, thereby improving the heat exchange efficiency.

[0045] In this way, by using a plurality of fixed plates 12 to divide the cooling chamber 22 into a plurality of cooling intervals and allowing the coolant to enter the cooling channel 23 along the cooling intervals to strengthen the cooling effect of the coolant on the spiral fins 11, the cooling effect on the epoxy powder can be increased. Moreover, by adjusting the sliding plate 15, the flow path of the coolant in the cooling channel 23 can be increased or decreased, that is, the cooling effect on the spiral fins 11 can be improved without adding a new cooling source, further ensuring the production quality of the epoxy powder.

[0046] It is worth mentioning that since the coolant absorbs heat when flowing in the cooling chamber 22, thereby reducing its heat exchange efficiency, resulting in different cooling effects of the coolant on various parts. Usually, the cooling effect of the coolant on the front spiral fins 11 is stronger, causing the epoxy powder at the bottom end of the delivery pipe 4 to be more easily affected by high heat. As shown in the figure, the flow paths of the coolant are a1, b1, and c1 respectively. The heat exchange efficiency of the coolant at a1 is significantly higher than that at c1. Therefore, after the device operates for a period of time, to avoid the powder curing caused by heat accumulation at c1, the sliding plates 15 at a1 and b1 can be contracted inward, reducing the flow path of the coolant at this location to reduce the heat absorption of the coolant when reaching c1, and making the sliding plate 15 at c1 slide into the cooling channel 23 to strengthen the cooling effect at c1 and avoid powder curing at this location.

[0047] Furthermore, a rotatable central shaft 10 is installed in the packaging body 1 below the rotating sleeve 7. A fixed sleeve 9 fixedly installed in the packaging body 1 is sleeved on the outer wall of the central shaft 10. The top ends of the fixed sleeve 9 and the central shaft 10 both penetrate through multiple fixed disks 12 and are rotatably connected to the inner top surface of the rotating sleeve 7. Multiple rotating blocks 13 located in the circular grooves of the fixed disks 12 are rotatably installed on the outer wall of the fixed sleeve 9. The rotating blocks 13 are semi-circular and have the same height as the circular grooves. The rotating blocks 13 are rotatably connected to the sliding plates 15 through connecting rods 14;

[0048] It also includes a locking component for locking the central shaft 10 and the rotating block 13 to each other.

[0049] According to the above embodiments, when the locking component locks the central shaft 10 and the rotating block 13 to each other, the central shaft 10 can be driven by an external drive source (micro motor) to drive the rotating block 13 to rotate. Specifically, see Figure 7 , when the rotating block 13 rotates, it will push the connecting rod 14 to push the sliding plate 15 outwards or pull it back into the fixed disk 12, completing the sliding adjustment of the sliding plate 15. When the locking between the central shaft 10 and the rotating block 13 is released by the locking component, at this time, the sliding plate 15 is affected by multiple factors such as the frictional force in the cooling channel 23, the sliding resistance of the connecting rod 14 to the sliding plate 15, and the rotational friction between the rotating block 13 and the fixed sleeve 9, and can maintain its current position to guide the heat exchange of the coolant. Thus, the heat exchange efficiency of multiple cooling regions can be adjusted separately according to different situations, thereby improving the stability of the overall heat exchange efficiency.

[0050] Further, the locking assembly includes a sliding pin 19 slidably mounted in a transverse groove formed inside the central shaft 10. An electromagnet 18 is fixedly mounted on the inner sidewall of the transverse groove, and a magnetic pole capable of repelling or attracting the electromagnet 18 is provided on the sidewall of the sliding pin 19. A rotation groove 21 for the sliding pin 19 to rotate is formed in the outer wall of the fixed sleeve 9, and a through hole for the sliding pin 19 to insert is formed in the sidewall of the rotating block 13. Temperature sensors 20 are fixedly mounted on the outer wall of the fixed sleeve 9 between every two fixed disks 12, and each temperature sensor 20 is electrically connected to the adjacent electromagnet 18.

[0051] According to the above embodiments, a specific embodiment of the locking assembly is provided. By arranging temperature sensors 20 in multiple heat exchange intervals, when the temperatures in different intervals change, the temperature sensors 20 can timely adjust the position of the sliding pin 19 through the electromagnet 18, and cooperate with the rotation of the central shaft 10 to separately adjust different heat exchange intervals, avoiding premature curing of the epoxy powder due to local heat increase of the spiral fins 11.

[0052] Further, a through groove is formed in the sidewall of the piston plate 16, and a convex block capable of blocking the through groove is provided on the inner sidewall of the cooling flow channel 23.

[0053] According to the above embodiments, forming a through groove in the sidewall of the piston plate 16 can not only reduce the sliding resistance when the sliding plate 15 slides, but also provide a certain amount of heat exchange for the outermost end of the spiral fins 11. When the sliding plate 15 slides to the deepest part of the cooling flow channel 23, since the inner sidewall of the cooling flow channel 23 is provided with a convex block capable of blocking the through groove, at this time, multiple heat exchange intervals are in a completely closed state, and the standard temperatures in multiple heat exchange intervals can be measured after the conveying is completed. If the temperature in a certain heat exchange interval rises too high in a short time or significantly changes abnormally, it can be determined that there is a fault in this area or powder is cured on the outer wall of the spiral fins 11, resulting in heat exchange being blocked, and the area needs to be repaired as soon as possible.

[0054] Further, through holes corresponding to each other are formed in each fixed disk 12 and the rotating block 13 therein, and the through holes on adjacent fixed disks 12 are centrosymmetrically arranged with the central shaft 10 as the center point.

[0055] According to the above embodiments, since through holes corresponding to each other are formed in each fixed disk 12 and the rotating block 13 therein, and the through holes in adjacent fixed disks 12 are centrosymmetrically arranged with the central axis 10 as the midpoint, when the temperature at a certain place in the cooling cavity 22 rises rapidly, the sliding plates 15 in other heat exchange areas of the cooling cavity 22 can be contracted to the innermost side, and the sliding plate 15 at this place can be adjusted to the outermost side, minimizing the heat absorption of the coolant in other areas and enhancing the heat exchange efficiency at this place. At this time, the through holes in the fixed disks 12 in other areas are aligned with the through holes in the rotating block 13, enabling the coolant to flow directly to this place without passing through other cooling channels 23, further improving the ability to individually adjust different areas. Moreover, when the coolant flows through different heat exchange areas, it is in a spiral shape, which can enhance the flushing effect of the coolant on the inner wall of the cooling cavity 22 and reduce the powder on the outer wall of the rotating sleeve 7.

[0056] Further, the maximum rotation angle of the rotating block 13 and the sliding pin 19 is 90 degrees.

[0057] According to the above embodiments, by limiting the maximum rotation range of the rotating block 13 and the sliding pin 19 to 90 degrees, it is possible to prevent the rotating sleeve 7 from driving the rotating block 13 and the sliding pin 19 to rotate through friction during rotation, reducing the adjustment effect of the device on each heat exchange area.

[0058] Further, the spacing of the spiral fins 11 gradually increases from top to bottom.

[0059] According to the above embodiments, since the temperature at the top of the spiral fins 11 is usually lower than that at the bottom, by setting the spacing of the spiral fins 11 to gradually increase from top to bottom, the friction of the spiral fins 11 at the bottom on the epoxy powder can be reduced, reducing heat generation, and setting a shorter pitch at the top can also improve the control accuracy of the quantitative transmission of the powder.

[0060] The standard parts used in this embodiment can be directly purchased from the market. For the non-standard structural components described in the specification and drawings, they can also be directly processed according to the existing technical knowledge without any doubt. At the same time, the connection methods of each component adopt the mature conventional means in the existing technology, and the machines, parts, and equipment all adopt the conventional models in the existing technology, so no specific description will be made here.

[0061] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A packaging machine for epoxy powder coatings, comprising a packaging machine body (1), characterized in that: A feeding cylinder (2) is fixedly mounted on the packaging machine body (1) via a bracket, a grinding cylinder (3) is integrally formed at the bottom end of the feeding cylinder (2), a component for grinding materials is provided inside the grinding cylinder (3), a conveying pipe (4) is fixedly connected to the bottom end of the grinding cylinder (3), a rotatable spiral conveying part is provided inside the conveying pipe (4), a discharge port (8) is provided at the bottom end of the conveying pipe (4), and a packaging component capable of sealing and packaging the epoxy powder discharged through the discharge port (8) is provided inside the packaging machine body (1) outside the discharge port (8); It also includes a cooling component, which is used to cool the spiral conveying part.

2. The epoxy powder coating packaging machine according to claim 1, characterized in that: The spiral conveying part comprises a transmission gear (6) rotatably mounted in the packaging machine body (1); a driving gear (5) meshing with the transmission gear (6) is also rotatably mounted in the packaging machine body (1); and the driving gear (5) can be driven by an external driving structure; a rotating sleeve (7) is fixedly mounted on the top end of the transmission gear (6) and penetrates into the conveying pipe (4); a spiral fin (11) is fixedly mounted on the outer wall of the rotating sleeve (7); the top end of the rotating sleeve (7) is rotatably connected to the inner wall of the bottom end of the grinding cylinder (3) through an axial groove; and a blanking gap is formed between the rotating sleeve (7) and the inner wall of the grinding cylinder (3).

3. The epoxy powder coating packaging machine according to claim 2, characterized in that: The cooling assembly comprises a through groove formed at the top of a rotating sleeve (7), and the through groove is connected to a water supply device in a packaging body (1) through a hose. A cooling cavity (22) connected to the through groove is formed in the rotating sleeve (7), and a plurality of cooling channels (23) penetrating into the spiral fins (11) are formed in the cooling cavity (22). The cooling cavity (22) is connected to a water recovery device through a pipeline buried in the packaging body (1).

4. The epoxy powder coating packaging machine according to claim 3, characterized in that: A plurality of fixed disks (12) are fixedly installed in the cooling cavity (22), which correspond to the cooling channels (23) one by one and have an outer diameter equal to the inner diameter of the cooling cavity (22). A sliding plate (15) capable of sliding adjustment is installed in the cooling channel (23). A piston plate (16) is fixedly installed at one end of the sliding plate (15), and the other end of the sliding plate (15) is connected to a circular groove provided in the fixed disk (12). A flow groove (17) is provided at one end of the sliding plate (15) close to the piston plate (16).

5. The epoxy powder coating packaging machine according to claim 4, characterized in that: A rotatable central axis (10) is installed in the packaging machine body (1) below the rotating sleeve (7); a fixed sleeve (9) fixedly installed in the packaging machine body (1) is sleeved on the outer wall of the central axis (10); the top ends of the fixed sleeve (9) and the central axis (10) penetrate through multiple groups of fixed disks (12) and are rotatably connected to the inner top surface of the rotating sleeve (7); multiple groups of rotating blocks (13) located in circular grooves of the fixed disks (12) are rotatably installed on the outer wall of the fixed sleeve (9); the rotating blocks (13) are semicircular and have a height consistent with that of the circular groove; the rotating blocks (13) are rotatably connected to the sliding plate (15) via a connecting rod (14); It also comprises a locking assembly, which is used to lock the central shaft (10) and the rotating block (13) with each other.

6. The epoxy powder coating packaging machine according to claim 5, characterized in that: The locking assembly comprises a sliding pin (19) slidably mounted in a transverse groove provided inside the central axis (10); an electromagnet (18) is fixedly mounted on the inner side wall of the transverse groove, and a magnetic pole capable of repelling or attracting the electromagnet (18) is provided on the side wall of the sliding pin (19); a rotating groove (21) for the sliding pin (19) to rotate is provided on the outer wall of the fixed sleeve (9); a through hole for the sliding pin (19) to be inserted is provided on the side wall of the rotating block (13); a temperature sensor (20) is fixedly mounted on the outer wall of the fixed sleeve (9) between each two fixed disks (12); and each temperature sensor (20) is electrically connected to an adjacent electromagnet (18).

7. The epoxy powder coating packaging machine according to claim 4, characterized in that: The side wall of the piston plate (16) is provided with a through groove, and the inner wall of the cooling channel (23) is provided with a protrusion capable of sealing the through groove.

8. The epoxy powder coating packaging machine according to claim 5, characterized in that: Each of the fixed disks (12) and the rotating block (13) therein are provided with corresponding through holes, and the through holes on adjacent fixed disks (12) are arranged symmetrically with the central axis (10) as the midpoint.

9. The epoxy powder coating packaging machine according to claim 6, characterized in that: The maximum rotation angle of the rotating block (13) and the sliding pin (19) is 90 degrees.

10. The epoxy powder coating packaging machine according to claim 1, characterized in that: The spacing between the spiral fins (11) gradually increases from top to bottom.

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