Auxiliary material adding device for hot-melt extrusion molding processing of PP (Propene Polymer) filler

Abstract

The invention discloses an auxiliary material adding device for hot-melt extrusion molding processing of a PP (Polypropylene) filler, relates to the field of hot-melt extrusion molding processing, and solves the problem that the raw material extrusion molding process is not stable enough when the existing auxiliary material adding device for hot-melt extrusion molding processing of the PP filler is used, the auxiliary material adding device comprises a machine body, an extrusion mechanism and a mixing mechanism, the machine body is fixedly connected with a hot melting barrel and a pressurizing box, the side face of the pressurizing box is fixedly connected with an extrusion pipe, the extrusion mechanism comprises pushing plates and a first conveying screw, and the mixing mechanism comprises a driving shaft, a conveying part and a control part. Raw materials in the hot melting barrel are pumped into the pressurizing box and continuously extruded into the extrusion pipe in a reciprocating mode, the molten raw materials are subjected to extrusion forming through the first conveying screw, the opening and closing state of the bottom of the hot melting barrel is controlled by controlling the rotating direction of the driving shaft, and function switching of auxiliary material adding and raw material extrusion is completed.

Description

Technical Field

[0001] The invention relates to the technical field of hot melt extrusion molding processing, in particular to an auxiliary material adding device for hot melt extrusion molding processing of PP filler. Background Art

[0002] Polypropylene (PP) is a thermoplastic resin produced by polymerizing propylene. Due to its regular structure and high degree of crystallization, PP has a melting point of up to 167°C. It is heat-resistant and corrosion-resistant, with a higher heat distortion temperature and greater hardness than polyethylene. Therefore, PP can be used in cables with higher heat resistance. In the production of cable conduits, hot-melt extrusion is generally used to extrude molten PP filler. PP filler is typically compounded by mixing a resin masterbatch with an auxiliary material, ultrafine calcium carbonate powder.

[0003] Existing hot-melt extrusion processing devices are generally divided into two drive modes: screw conveying extrusion and cylinder reciprocating extrusion. The advantage of screw conveying is that it can extrude materials continuously, but the pressure is relatively low. Its principle is to use the gravity and friction of the raw material itself to push and extrude through the spiral blades. When the raw material inside the spiral is insufficient, it is difficult to provide strong pressure, resulting in uneven density of the extruded product. The biggest disadvantage of cylinder push-pull extrusion is that it is difficult to output continuously. The product is prone to breakage during the pullback process, affecting the continuous and stable output of the product. In addition, powdered auxiliary materials need to be added in a quantitative manner during the extrusion and conveying process. Existing equipment suffers from the agglomeration of auxiliary materials during the auxiliary material addition process, affecting the stability of the extruded product. To this end, we propose an auxiliary material addition device for hot-melt extrusion of PP fillers. Summary of the Invention

[0004] The purpose of the present invention is to provide an auxiliary material adding device for hot melt extrusion molding of PP fillers, which is convenient for improving the uniformity of adding and mixing powder auxiliary materials and making the extrusion molding process more continuous and stable, so as to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an auxiliary material adding device for hot-melt extrusion molding of PP filler, comprising a body, an extrusion mechanism and a mixing mechanism, wherein a hot melt barrel and a pressure box are fixedly connected to the body, and an extrusion tube is fixedly connected to the side of the pressure box, the extrusion mechanism comprises a pushing plate which is slidably connected to the inner wall of the pressure box in a horizontal direction, one end of the extrusion tube is provided with a connecting hole which is connected to the middle side of the pressure box, a dividing block is slidably connected in the connecting hole, and one side of the dividing block is fixedly connected to the dividing plate which is slidably connected to the inner wall of the pressure box in a horizontal direction, the inner wall of the extrusion tube is rotatably connected to a first conveying screw for drawing the raw material in the hot melt barrel into the pressure box by controlling the moving state of the pushing plates on both sides, and continuously reciprocatingly squeezing the raw material into the extrusion tube, and the molten raw material is extruded and molded by the first conveying screw, and the mixing mechanism comprises a first The cam is fixedly provided with a first end of the driving shaft and is connected to the second rotating shaft in rotation within the hot melt barrel, and a screen is slidably connected to the hot melt barrel in a vertical direction. The second rotating shaft is provided with a conveying member for stirring the molten raw material and driving the screen to shake, so that the auxiliary material is evenly added to the molten raw material. The bottom of the hot melt barrel is provided with a control member for controlling the communication state with the pressurized box, which is used to drive the control member to close the bottom of the hot melt barrel when the driving shaft rotates forward, so that the raw material and auxiliary material in the hot melt barrel are fully mixed through the conveying member. When the driving shaft rotates reversely, it drives the control member to open the bottom of the hot melt barrel, and at the same time links the first rotating shaft and the second rotating shaft to rotate, so as to continuously push the molten raw material from the hot melt barrel to the pressurized box, and then to the extrusion tube for extrusion molding, so as to improve the uniformity of adding and mixing the powder auxiliary material and make the extrusion molding process more continuous and stable.

[0006] Preferably, the extrusion mechanism also includes a push rod fixedly mounted on the side plate of the push plate, the push rod passes through one side of the pressurizing box, and is slidably connected to the inner wall of the pressurizing box in a horizontal direction, and a sliding plate is fixedly connected to the upper side of the partition plate, and two groups of output ports for inputting molten raw materials from the hot melt barrel into the pressurizing box are provided on the bottom of the hot melt barrel and the pressurizing box, and two groups of switching holes that can be respectively connected to the two groups of output ports are provided on the sliding plate, and the two groups of switching holes are respectively located on both sides of the partition plate, and a driving member for controlling the sliding state of the push rod is provided on the machine body, so as to facilitate the continuous and stable extrusion of the molten raw materials.

[0007] Preferably, the control component includes a driving motor fixedly installed in the body, the output end of the driving motor is coaxially fixedly connected to one end of the driving shaft, the bottom of the hot melt barrel is slidably connected to a baffle, and the baffle is provided with two groups of opening and closing holes that can be connected to the output port, the partition plate and the partition block are both provided with sliding grooves that slide in contact with the outer wall of the first rotating shaft, the first rotating shaft passes through the sliding groove and the pressurizing box, and the driving shaft is provided with an adjusting component for controlling the movement state of the baffle, so as to facilitate control of the communication state with the pressurizing box.

[0008] Preferably, the adjusting member includes a driving plate fixedly mounted on the baffle, the driving shaft passes through the driving plate and is movably connected to the inner wall of the driving plate, a driving block is fixedly connected to the driving plate, and the outer wall of the driving shaft is provided with a first annular groove, a threaded groove and a second annular groove, the two ends of the threaded groove are respectively connected to the first annular groove and the second annular groove, the first annular groove, the threaded groove and the second annular groove can all be slidably connected to the driving block, and the side of the pressurizing box is fixedly connected to a first spring fixedly connected to the driving plate, so as to facilitate controlling the movement state of the baffle.

[0009] Preferably, the conveying member includes multiple groups of protrusions installed on the bottom of the screen, the outer wall of the second rotating shaft is fixedly connected to the second conveying screw that rotates and fits with the inner wall of the hot melt barrel, and the second conveying screw is evenly provided with multiple groups of plug holes, and a stirring rod is inserted into the plug hole. The top of the stirring rod is spherical and can slide and contact with the bottom surface of the protrusion. The first rotating shaft is provided with a rotating member for driving the second rotating shaft to rotate synchronously, so as to facilitate stirring the molten raw materials while driving the screen to shake, and evenly adding the auxiliary materials to the molten raw materials.

[0010] Preferably, the driving member includes an electric telescopic rod fixedly mounted on the body, a connecting frame is connected to the body in a horizontal sliding direction, the two groups of push rods are fixedly connected to the connecting frame, and the telescopic end of the electric telescopic rod is fixedly connected to the connecting frame, so as to facilitate the control of the sliding state of the push rod.

[0011] Preferably, a second spring is fixedly connected to the side of the push plate, one end of the second spring is fixedly connected to a buffer plate, the buffer plate is slidably connected to the outer wall of the push plate in a horizontal direction, and the top surfaces of the push plate and the buffer plate are both slidably fitted with the bottom surface of the sliding plate, so that in the initial stage of the reverse sliding of the push plate, the second spring can apply continuous thrust to the internal raw material, thereby ensuring that the raw material in the pressurized box can be continuously pushed toward the extrusion tube.

[0012] Preferably, the rotating member includes a first bevel gear fixedly mounted on the first rotating shaft, and the bottom of the second rotating shaft is fixedly connected to a second bevel gear meshing with the first bevel gear, so as to drive the second rotating shaft to rotate synchronously when the first rotating shaft rotates.

[0013] Preferably, a fixed plate is fixedly connected to the inner wall of the extrusion tube near one end of the communicating hole, the first rotating shaft passes through the fixed plate and is rotatably connected to the fixed plate, and the side surface of the dividing block slides in contact with the fixed plate in the horizontal direction to prevent the molten raw material from entering the sliding groove when the dividing block slides left and right.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The present invention provides an auxiliary material adding device for hot melt extrusion molding of PP filler, which solves the problem that when the auxiliary material adding device for hot melt extrusion molding of PP filler is used, the powder auxiliary material is difficult to add stably during the extrusion process, and the raw material extrusion molding process is not stable enough. By controlling the moving state of the pushing plates on both sides, the raw material in the hot melt barrel is drawn into the pressurized box and continuously extruded back and forth into the extrusion tube, and the molten raw material is extruded and molded by the first conveying screw. When the driving shaft rotates forward, it drives the control part to close the bottom of the hot melt barrel, and the raw material and auxiliary material in the hot melt barrel are fully mixed by the conveying part. When the driving shaft rotates reversely, it drives the control part to open the bottom of the hot melt barrel, and at the same time, the first rotating shaft and the second rotating shaft are rotated in conjunction, and the molten raw material is continuously pushed from the hot melt barrel to the pressurized box and then to the extrusion tube for extrusion molding, thereby improving the continuous stability of extrusion molding while ensuring that the auxiliary material can be evenly added and mixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 Schematic diagram of the internal structure of the present invention;

[0018] Figure 3 It is a schematic diagram of the local structure of the mixing mechanism of the present invention;

[0019] Figure 4 for Figure 3 Enlarged view of area A in the middle;

[0020] Figure 5 This is a schematic diagram of the partial structure of the conveying member of the present invention;

[0021] Figure 6 for Figure 5 Enlarged view of area B in the middle;

[0022] Figure 7 This is a schematic diagram of the local structure of the control component of the present invention;

[0023] Figure 8 for Figure 7 Enlarged view of area C in the middle;

[0024] Figure 9 It is a schematic diagram of the partial structure of the extrusion mechanism of the present invention;

[0025] Figure 10 for Figure 9 Enlarged view of area D in the middle;

[0026] Figure 11 An exploded view of the local structure of the extrusion mechanism of the present invention;

[0027] Figure 12 for Figure 11 Enlarged view of area E in the middle.

[0028] In the figure: 1-body; 2-hot melt barrel; 3-pressurizing box; 4-extrusion tube; 5-extrusion mechanism; 6-push plate; 7-connecting hole; 8-separator; 9-separator; 10-first conveying screw; 11-mixing mechanism; 12-first rotating shaft; 13-driving shaft; 14-second rotating shaft; 15-screen; 16-conveying member; 17-control member; 18-push rod; 19-sliding plate; 20-output port; 21-switching hole; 22-driving member; 23-driving motor; 24- Baffle; 25-opening and closing hole; 26-sliding groove; 27-adjusting member; 28-driving plate; 29-driving block; 30-first annular groove; 31-threaded groove; 32-second annular groove; 33-first spring; 34-bump; 35-plug-in hole; 36-stirring rod; 37-rotating member; 38-electric telescopic rod; 39-connecting frame; 40-second spring; 41-buffer plate; 42-first bevel gear; 43-second bevel gear; 44-fixed plate; 45-second conveying screw. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] Example 1

[0031] See also Figures 1-12The figure shows an auxiliary material adding device for hot melt extrusion molding of PP filler, comprising a body 1, an extrusion mechanism 5 and a mixing mechanism 11. A hot melt barrel 2 and a pressurizing box 3 are fixedly connected to the body 1, and an extrusion tube 4 is fixedly connected to the side of the pressurizing box 3. The extrusion mechanism 5 includes a pushing plate 6 that is horizontally slidably connected to the inner wall of the pressurizing box 3. A connecting hole 7 is provided at one end of the extrusion tube 4, which is connected to the middle side of the pressurizing box 3. A dividing block 8 is slidably connected in the connecting hole 7. One side of the dividing block 8 is fixedly connected to a dividing plate 9 that is horizontally slidably connected to the inner wall of the pressurizing box 3. A first conveying screw 10 is rotatably connected to the inner wall of the extrusion tube 4, which is used to draw the raw material in the hot melt barrel 2 into the pressurizing box 3 by controlling the moving state of the pushing plates 6 on both sides, and continuously extrude it back and forth into the extrusion tube 4, and the molten raw material is extruded and molded by the first conveying screw 10.

[0032] The mixing mechanism 11 includes a first rotating shaft 12 coaxially fixedly mounted on the first conveying screw 10, one end of the first rotating shaft 12 is coaxially fixedly connected to the driving shaft 13, and a second rotating shaft 14 is rotatably connected in the hot melt barrel 2, and a screen 15 is slidably connected in the hot melt barrel 2 along the vertical direction. The second rotating shaft 14 is provided with a conveying member 16 for stirring the molten raw material while driving the screen 15 to shake, so that the auxiliary material is evenly added to the molten raw material. The bottom of the hot melt barrel 2 is provided with a control member 17 for controlling the communication state with the pressurizing box 3. When the driving shaft 13 rotates forward, it drives the control member 17 to close the bottom of the hot melt barrel 2, and fully mixes the raw materials and auxiliary materials in the hot melt barrel 2 through the conveying member 16. When the driving shaft 13 rotates reversely, it drives the control member 17 to open the bottom of the hot melt barrel 2, and at the same time links the first rotating shaft 12 and the second rotating shaft 14 to rotate, so as to continuously push the molten raw material from the hot melt barrel 2 to the pressurizing box 3, and then to the extrusion tube 4 for extrusion molding.

[0033] The extrusion mechanism 5 also includes a push rod 18 fixedly mounted on the side plate of the push plate 6. The push rod 18 passes through one side of the pressurizing box 3 and is slidably connected to the inner wall of the pressurizing box 3 in the horizontal direction. A sliding plate 19 is fixedly connected to the upper side of the partition plate 9. Two groups of output ports 20 for inputting molten raw materials from the hot melt barrel 2 to the pressurizing box 3 are provided on the bottom of the hot melt barrel 2 and the pressurizing box 3. Two groups of switching holes 21 that can be respectively connected to the two groups of output ports 20 are provided on the sliding plate 19. The two groups of switching holes 21 are respectively located on both sides of the partition plate 9. A driving member 22 for controlling the sliding state of the push rod 18 is provided on the machine body 1.

[0034] The driving member 22 includes an electric telescopic rod 38 fixedly mounted on the body 1 , a connecting frame 39 is slidably connected to the body 1 in the horizontal direction, both sets of push rods 18 are fixedly connected to the connecting frame 39 , and the telescopic end of the electric telescopic rod 38 is fixedly connected to the connecting frame 39 .

[0035] In this embodiment, resin masterbatch is loaded into the hot melt barrel 2 for melting, the screen 15 is covered, the required amount of powdered ultrafine calcium carbonate powder auxiliary material is added to the upper side of the screen 15, and then the top cover is covered. The electric telescopic rod 38 drives the connecting frame 39 to slide back and forth in the horizontal direction, thereby driving the push rods 18 on both sides to slide, and the push rods 18 drive the push plate 6 to move. In the process of sliding the push plate 6, the space in the pressurized box 3 on one side of the partition plate 9 is reduced, and the space on the other side is increased. At this time, the partition plate 9 and the sliding plate 19 are pushed to the side where the push plate 6 moves, and the partition block 8 slides and limits in the connecting hole 7, and the empty The side with reduced space is connected with the extrusion tube 4, and at the same time, the sliding plate 19 slides to block the output port 20 on this side, and the switching hole 21 is connected with the output port 20 on the other side, so that the molten liquid inside the side with reduced space is squeezed into the extrusion tube 4, and at the same time, the space on the other side is increased, and the liquid raw material in the hot melt barrel 2 can be drawn into the pressurized box 3 on the other side through the output port 20 and the switching hole 21. This reciprocating process can realize the function of sucking and storing raw materials on one side and extruding raw materials on the other side, so that the raw materials can be continuously sucked and extruded as the push plate 6 slides back and forth, and the output is more continuous and stable.

[0036] It should be noted that: (The regulations are attached Figure 3 (Observed from the left side, the drive shaft 13 rotates clockwise for positive rotation, and counterclockwise for reverse rotation) When the drive shaft 13 rotates forward, it drives the control part 17 to close the bottom of the hot melt barrel 2, and the raw materials and auxiliary materials in the hot melt barrel 2 are fully mixed through the conveying part 16. When the drive shaft 13 rotates reversely, it drives the control part 17 to open the bottom of the hot melt barrel 2, and at the same time links the first rotating shaft 12 and the second rotating shaft 14 to rotate, and continuously pushes the molten raw material from the hot melt barrel 2 to the pressurized box 3, and then to the extrusion tube 4. Through the rotation of the first conveying screw 10, the molten raw material is extruded from the extrusion hole at one end of the extrusion tube 4 to form, thereby improving the continuous stability of the extrusion forming while ensuring that the auxiliary materials can be evenly added and mixed. The sieve mesh 15 has a large mesh size and is only used for dispersing and adding powder auxiliary materials. It will not be blocked with shaking.

[0037] Example 2

[0038] See also Figures 1-12Example 2 is described. This example further illustrates Example 1. The control component 17 shown in the figure includes a drive motor 23 fixedly installed in the body 1. The model of the drive motor 23 is preferably Y80M1-2. The output end of the drive motor 23 is coaxially fixedly connected to one end of the drive shaft 13. The bottom of the hot melt barrel 2 is slidably connected with a baffle 24. The baffle 24 is provided with two groups of opening and closing holes 25 that can be connected to the output port 20. The partition plate 9 and the partition block 8 are both provided with a sliding groove 26 that slides in contact with the outer wall of the first rotating shaft 12. The first rotating shaft 12 passes through the sliding groove 26 and the pressurizing box 3. The drive shaft 13 is provided with an adjustment component 27 for controlling the movement state of the baffle 24.

[0039] The adjusting member 27 includes a driving plate 28 fixedly mounted on the baffle 24, the driving shaft 13 passes through the driving plate 28 and is movably connected to the inner wall of the driving plate 28, a driving block 29 is fixedly connected to the driving plate 28, and the outer wall of the driving shaft 13 is provided with a first annular groove 30, a threaded groove 31 and a second annular groove 32, the two ends of the threaded groove 31 are respectively connected to the first annular groove 30 and the second annular groove 32, the first annular groove 30, the threaded groove 31 and the second annular groove 32 can all be slidably connected to the driving block 29, and the side of the pressurizing box 3 is fixedly connected to a first spring 33 fixedly connected to the driving plate 28.

[0040] The conveying member 16 includes multiple groups of protrusions 34 installed at the bottom of the screen 15. The outer wall of the second rotating shaft 14 is fixedly connected to the second conveying screw 45 that rotates and fits with the inner wall of the hot melt barrel 2. Multiple groups of plug holes 35 are evenly opened on the second conveying screw 45. A stirring rod 36 is inserted into the plug hole 35. The top of the stirring rod 36 is spherical and can slide in contact with the bottom surface of the protrusion 34. The first rotating shaft 12 is provided with a rotating member 37 for driving the second rotating shaft 14 to rotate synchronously. The rotating member 37 includes a first bevel gear 42 fixedly mounted on the first rotating shaft 12, and the bottom of the second rotating shaft 14 is fixedly connected to a second bevel gear 43 that meshes with the first bevel gear 42.

[0041] In this embodiment, the rotation direction of the drive shaft 13 is controlled by the drive motor 23. When the drive shaft 13 rotates forward, it drives the first rotating shaft 12 and the first conveying screw 10 to rotate, and the operating state of the electric telescopic rod 38 is closed. At this time, the first conveying screw 10 pushes the internal raw material to the side of the pressurized box 3, and no extrusion operation is performed. At the same time, the drive block 29 is gradually pulled from the first annular groove 30 by the first tension spring so that the drive block 29 slides into the thread groove 31. As the drive shaft 13 rotates, the drive block 29 and the drive plate 28 are driven to slide toward the side of the second annular groove 32, thereby releasing the connection between the opening and closing hole 25 and the output port 20. The baffle 24 blocks and separates the middle part of the output port 20. After sliding into the second annular groove 32, the drive block 29 will continue to slide in the second annular groove 32. At this time, the first spring 33 is in a compressed state.

[0042] It is worth noting that: when the first rotating shaft 12 drives the first bevel gear 42 so that the second bevel gear 43 drives the second rotating shaft 14 to rotate, the second rotating shaft 14 will drive the second conveying screw 45 to rotate, and the second conveying screw 45 will drive the stirring rod 36 to rotate. The top end of the stirring rod 36 constantly conflicts with the bottom surface of the protrusion 34, so that the screen 15 can be lifted up intermittently, and the required amount of auxiliary material powder can be placed on the screen 15 in advance. After covering the top cover, the auxiliary material can be added evenly to avoid the auxiliary material from agglomerating in the liquid. At this time, the second conveying screw 45 will push the molten liquid upward, thereby improving the mixing efficiency between the bottom raw material and the top auxiliary material. After use, the top cover can be opened to remove the screen 15, and the stirring rod 36 can also be pulled out, which is convenient for cleaning the inside of the hot melt barrel 2.

[0043] When the driving shaft 13 rotates in the opposite direction, it drives the first rotating shaft 12 and the first conveying screw 10 to rotate in the opposite direction, so that the first conveying screw 10 pushes the raw material in the extrusion tube 4 to the extrusion port, and at the same time, the second conveying screw 45 rotates in the opposite direction, pushing the raw material in the hot melt barrel 2 continuously downward to the position of the output port 20. The screw groove 31 rotates in the opposite direction to cooperate with the push of the first spring 33, so that the driving block 29 and the driving plate 28 are input into the screw groove 31 from one end of the second annular groove 32 in the opposite direction until they slide into the first annular groove 30, so that the opening and closing hole 25 is connected with the output port 20, and the molten raw material in the hot melt barrel 2 can be input into the pressurized box 3. At this time, the electric telescopic rod 38 is started to work, driving the push plates 6 on both sides to push and pull reciprocatingly, so as to realize the stable suction and conveying of the raw materials, and cooperate with the conveying of the first conveying screw 10 to realize continuous and stable extrusion of the raw materials.

[0044] Example 3

[0045] See also Figures 1-12 Example 3 is described. This example further explains Example 1. The side of the push plate 6 in the figure is fixedly connected to a second spring 40, and one end of the second spring 40 is fixedly connected to a buffer plate 41. The buffer plate 41 is slidably connected to the outer wall of the push plate 6 in the horizontal direction. The top surfaces of the push plate 6 and the buffer plate 41 are both slidably fitted with the bottom surface of the sliding plate 19. The inner wall of the extrusion tube 4 near one end of the connecting hole 7 is fixedly connected to a fixed plate 44. The first rotating shaft 12 passes through the fixed plate 44 and is rotatably connected to the fixed plate 44. The side of the dividing block 8 is slidably fitted with the fixed plate 44 in the horizontal direction.

[0046] In this embodiment, since the position of the sliding groove 26 will change when the partition plate 9 slides left and right, and since the position of the first rotating shaft 12 will not change, one end of the sliding groove 26 will have an opening. At this time, by setting a fixed plate 44, one end of the sliding groove 26 can be blocked, and the other end of the sliding groove 26 slides and fits with the inner wall of the pressurizing box 3, so that no raw material will enter the sliding groove 26. At the same time, the fixed plate 44 can also support the first rotating shaft 12 to maintain the stability of the first rotating shaft 12. The fixed plate 44 is only used to block one end of the sliding groove 26, and the area is small, which will not affect the transportation of the raw material in the connecting hole 7.

[0047] When the push plate 6 slides, one side of the buffer plate 41 will first come into contact with the raw material in the pressurized box 3, gradually compressing the second spring 40 to accumulate force, and then the push plate 6 drives the buffer plate 41 to extrude the molten raw material for transportation. When the push plate 6 initially moves in the opposite direction, the buffer plate 41 is subjected to the elastic force of the second spring 40, so that there is still a thrust on the internal liquid until it slides in the opposite direction with the partition plate 9 to switch the connection state of the connecting hole 7, thereby avoiding the liquid in the extrusion tube 4 being extracted from the connecting hole 7 into the pressurized box 3 during the reverse sliding.

[0048] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0049] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A device for adding auxiliary materials for hot melt extrusion molding of PP filler, characterized in that: include: A machine body (1), to which a hot melt barrel (2) and a pressurizing box (3) are fixedly connected, and an extrusion tube (4) is fixedly connected to the side of the pressurizing box (3); An extrusion mechanism (5), the extrusion mechanism (5) comprising a push plate (6) connected to the inner wall of the pressurizing box (3) in a horizontal sliding direction, one end of the extrusion tube (4) is provided with a connecting hole (7) connected to the middle side of the pressurizing box (3), a partition block (8) is connected in a sliding manner in the connecting hole (7), one side of the partition block (8) is fixedly connected with a partition plate (9) connected to the inner wall of the pressurizing box (3) in a horizontal sliding direction, the inner wall of the extrusion tube (4) is rotatably connected with a first conveying screw (10), which is used to control the moving state of the push plates (6) on both sides to draw the raw materials in the hot melt barrel (2) into the pressurizing box (3), and continuously extrude the raw materials into the extrusion tube (4) in a reciprocating manner, and extrude the molten raw materials through the first conveying screw (10); The mixing mechanism (11) comprises a first rotating shaft (12) coaxially fixedly mounted on the first conveying screw (10), one end of the first rotating shaft (12) being coaxially fixedly connected to a driving shaft (13), a second rotating shaft (14) being rotatably connected in the hot melt barrel (2), a screen (15) being slidably connected in the hot melt barrel (2) along a vertical direction, a conveying member (16) being provided on the second rotating shaft (14) for stirring the molten raw material and driving the screen (15) to shake so as to evenly add the auxiliary material into the molten raw material, and a control member (16) for controlling the pressure The control member (17) is connected to the pressurized box (3), and is used to drive the control member (17) to close the bottom of the hot melt barrel (2) when the drive shaft (13) rotates in the forward direction, so as to fully mix the raw materials and auxiliary materials in the hot melt barrel (2) through the conveying member (16); when the drive shaft (13) rotates in the reverse direction, it drives the control member (17) to open the bottom of the hot melt barrel (2), and at the same time, the first rotating shaft (12) and the second rotating shaft (14) are linked to rotate, so as to continuously push the molten raw material from the hot melt barrel (2) to the pressurized box (3), and then to the extrusion tube (4) for extrusion molding.

2. The auxiliary material adding device for hot melt extrusion molding of PP filler according to claim 1, characterized in that: The extrusion mechanism (5) also includes a push rod (18) fixedly mounted on the side plate of the push plate (6), the push rod (18) passing through one side of the pressurizing box (3) and being slidably connected to the inner wall of the pressurizing box (3) in the horizontal direction, a sliding plate (19) being fixedly connected to the upper side of the partition plate (9), two groups of output ports (20) for inputting molten raw materials from the hot melt barrel (2) into the pressurizing box (3) are provided on the bottom of the hot melt barrel (2) and the pressurizing box (3), two groups of switching holes (21) which can be respectively connected to the two groups of output ports (20) are provided on the sliding plate (19), and the two groups of switching holes (21) are respectively located on both sides of the partition plate (9), and a driving member (22) for controlling the sliding state of the push rod (18) is provided on the machine body (1).

3. The auxiliary material adding device for hot melt extrusion molding of PP filler according to claim 2, characterized in that: The control component (17) includes a driving motor (23) fixedly installed in the body (1), the output end of the driving motor (23) is coaxially fixedly connected to one end of the driving shaft (13), the bottom of the hot melt barrel (2) is slidably connected with a baffle (24), the baffle (24) is provided with two groups of opening and closing holes (25) that can be connected to the output port (20), the partition plate (9) and the partition block (8) are both provided with a sliding groove (26) that is slidably fitted with the outer wall of the first rotating shaft (12), the first rotating shaft (12) passes through the sliding groove (26) and the pressurizing box (3), and the driving shaft (13) is provided with an adjusting component (27) for controlling the moving state of the baffle (24).

4. The auxiliary material adding device for hot melt extrusion molding of PP filler according to claim 3, characterized in that: The adjusting member (27) comprises a driving plate (28) fixedly mounted on the baffle (24); the driving shaft (13) passes through the driving plate (28) and is movably sleeved with the inner wall of the driving plate (28); a driving block (29) is fixedly connected to the driving plate (28); a first annular groove (30), a thread groove (31) and a second annular groove (32) are formed on the outer wall of the driving shaft (13); two ends of the thread groove (31) are respectively connected to the first annular groove (30) and the second annular groove (32); the first annular groove (30), the thread groove (31) and the second annular groove (32) are all capable of being slidably connected to the driving block (29); and a first spring (33) fixedly connected to the driving plate (28) is fixedly connected to the side surface of the pressurizing box (3).

5. The auxiliary material adding device for hot melt extrusion molding of PP filler according to claim 1, characterized in that: The conveying member (16) includes a plurality of groups of protrusions (34) installed at the bottom of the screen (15); the outer wall of the second rotating shaft (14) is fixedly connected with a second conveying screw (45) which is rotatably fitted with the inner wall of the hot melt barrel (2); a plurality of groups of plug holes (35) are evenly arranged on the second conveying screw (45); a stirring rod (36) is inserted into the plug hole (35); the top end of the stirring rod (36) is spherical and can slide against the bottom surface of the protrusion (34); the first rotating shaft (12) is provided with a rotating member (37) for driving the second rotating shaft (14) to rotate synchronously.

6. The auxiliary material adding device for hot melt extrusion molding of PP filler according to claim 2, characterized in that: The driving member (22) comprises an electric telescopic rod (38) fixedly mounted on the machine body (1); a connecting frame (39) is slidably connected to the machine body (1) in a horizontal direction; both sets of the pushing rods (18) are fixedly connected to the connecting frame (39); and the telescopic end of the electric telescopic rod (38) is fixedly connected to the connecting frame (39).

7. The auxiliary material adding device for hot melt extrusion molding of PP filler according to claim 2, characterized in that: A second spring (40) is fixedly connected to the side of the push plate (6), one end of the second spring (40) is fixedly connected to a buffer plate (41), the buffer plate (41) is slidably connected to the outer wall of the push plate (6) in a horizontal direction, and the top surfaces of the push plate (6) and the buffer plate (41) are both slidably fitted to the bottom surface of the sliding plate (19).

8. The auxiliary material adding device for hot melt extrusion molding of PP filler according to claim 5, characterized in that: The rotating member (37) comprises a first bevel gear (42) fixedly mounted on the first rotating shaft (12); and a second bevel gear (43) meshing with the first bevel gear (42) is fixedly connected to the bottom of the second rotating shaft (14).

9. The auxiliary material adding device for hot melt extrusion molding of PP filler according to claim 1, characterized in that: A fixing plate (44) is fixedly connected to the inner wall of the extrusion tube (4) at one end close to the connecting hole (7); the first rotating shaft (12) passes through the fixing plate (44) and is rotatably connected to the fixing plate (44); and the side surface of the partition block (8) is slidably fitted with the fixing plate (44) in the horizontal direction.

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