A hot cutting and granulating device applied to production of flame-retardant modified polyolefin

Abstract

The application discloses a hot cutting and granulating device applied to the production of flame-retardant modified polyolefin, and belongs to the field of plastic products. The hot cutting and granulating device applied to the production of flame-retardant modified polyolefin comprises a rack, a molten extrusion mechanism is fixedly connected to the upper end of the rack, a first driving mechanism is fixedly connected to the left side of the upper end of the rack and located on the left side of the molten extrusion mechanism, an upper feeding mechanism and a second driving mechanism are respectively fixedly connected to the upper side of the molten extrusion mechanism and the first driving mechanism, a shaft coupling is movably connected between the molten extrusion mechanism and the first driving mechanism and between the upper feeding mechanism and the second driving mechanism, and a cutting mechanism is movably connected to the right side of the molten extrusion mechanism. The cutting mechanism comprises a cutting cover movably connected to the right side of the molten extrusion mechanism, sliding cutting of the extruded material can be realized, the flatness of a cutting edge is improved, the occurrence probability of cutting defects such as wire drawing and snake lines during cutting is reduced, and the granulating quality is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of plastic products, more particularly, to a hot cutting and granulating device applied to the production of flame-retardant modified polyolefin. BACKGROUND

[0002] Polyolefin generally refers to a kind of thermoplastic resin collectively obtained by polymerization or copolymerization of alpha-olefins such as ethylene, propylene, 1-butene, 1-pentene, 1-hexene, 1-octene, 4-methyl-1-pentene and certain cyclic olefins;

[0003] The granulating process of polyolefin is to extrude the raw material into a strip after melting and cut it into granules by a cutter. In order to improve the flame retardancy of polyolefin, a flame retardant is usually added to the raw material for modification.

[0004] The existing patent (publication number: CN208788836U) is a new plastic granulator cutting device, which comprises a plastic granulator shell, a plastic granulator body, a granulating and granulating plate, a brush cleaning and water spraying plate structure, an adjustable cutting knife structure, a cutter motor, a mounting frame, a driving pulley, a V-belt, a flow guide cover structure, a primary support leg, a secondary support leg, a semi-cylindrical water outlet pipe, a flow guide seat, a water collecting bottle, a central shaft and a granulating hole. The plastic granulator shell is installed outside the plastic granulator body. The granulating and granulating plate is bolted to the right part of the front surface of the plastic granulator body. The fixed sliding block, the adjustable sliding rail, the adjusting bolt and the cutting knife body are arranged, which is conducive to adjusting the position of the cutting knife body and ensuring the uniformity of cutting. The arrangement of the cutting knife body is conducive to ensuring the cutting effect and the consistency of cutting. The arrangement of the cleaning hair is conducive to cleaning the cutting knife body, ensuring the accuracy of cutting and preventing the cutting knife body from pulling after cutting.

[0005] Although the above-mentioned patent can adjust the position of the cutting knife body to ensure the uniformity of cutting, in the hot cutting process, the extruded melt is not cooled in advance, and the cutting by the cutter is synchronized with the water ring cooling after extrusion. Therefore, the extruded material still has a certain softness when the cutter touches the extruded material, which causes the cutting edge to deform and become flat, thereby affecting the cutting quality. SUMMARY

[0006] 1. Technical problem to be solved

[0007] In view of the problems existing in the prior art, the purpose of the present application is to provide a hot cutting and granulating device applied to the production of flame-retardant modified polyolefin, which can realize sliding cutting of the extruded material, improve the flatness of the cutting edge, reduce the occurrence probability of cutting defects such as pulling and snake pattern during cutting, and ensure the granulating quality.

[0008] 2. Technical solution

[0009] To solve the above problems, the application adopts the following technical solutions.

[0010] A hot cutting and granulating device applied to the production of flame-retardant modified polyolefin, comprising a rack, a molten extrusion mechanism fixedly connected to the upper end of the rack, and a first driving mechanism fixedly connected to the left side of the upper end of the rack and located on the left side of the molten extrusion mechanism, an upper feeding mechanism and a second driving mechanism fixedly connected to the upper part of the molten extrusion mechanism and the first driving mechanism respectively, a shaft coupling movably connected between the molten extrusion mechanism and the first driving mechanism and between the upper feeding mechanism and the second driving mechanism, and a cutting mechanism movably connected to the right side of the molten extrusion mechanism.

[0011] The cutting mechanism comprises a cutting cover movably connected to the right side of the molten extrusion mechanism, a rotary motor fixedly connected to the right side of the cutting cover, a water ring fixedly connected to the middle of the inner wall of the cutting cover, a rotating shaft movably connected to the middle of the inner wall of the right side of the cutting cover, an output shaft of the rotary motor fixedly connected to the right side of the rotating shaft and penetrating the cutting cover, a fixed disc fixedly connected to the left side of the rotating shaft, a cutter disc fixedly connected to the right side of the front and rear ends of the fixed disc, a cutter bar movably connected to the ring side of the cutter disc, a first tooth block fixedly connected to the right side of the cutter bar at equal intervals, a sleeve fixedly connected to the outside of the rotating shaft on the right side of the inner wall of the cutting cover, a second tooth block fixedly connected to the left side of the outer wall of the sleeve at equal intervals, the second tooth block being engaged with the first tooth block, and a discharge pipe fixedly connected to the lower end of the cutting cover.

[0012] Further, the inside of the second tooth block is provided with a lubricating mechanism, the lubricating mechanism comprises a pressing plate movably connected to the contact surface between the second tooth block and the first tooth block, a seepage plate fixedly connected to the inside of the second tooth block, a first spring fixedly connected between the seepage plate and the pressing plate, a one-way valve fixedly connected between the second tooth block and the sleeve, an oil injection port formed in the left side of the second tooth block, and the inside of the sleeve is filled with lubricating oil.

[0013] Further, the elastic force of the first spring is greater than the friction force between the pressing plate and the second tooth block, the inside of the oil injection port is provided with a pressure valve, and the pressure of the pressure valve is less than the hydraulic pressure generated when the pressing plate is compressed into the inside of the second tooth block.

[0014] Further, the lubricating mechanism further comprises a groove formed in the left side of the inner wall of the cutting cover, a gum-removing cotton fixedly connected to the left side of the inner wall of the groove, an air bag provided in the inside of the gum-removing cotton, and a pressure hole formed in the surface of the air bag, and the inside of the left side of the cutting cover is hollow.

[0015] Further, a pressure stabilizing plate is slidably connected to the inside of the left side of the cutting cover, and a second spring is fixedly connected between the left side of the pressure stabilizing plate and the left side of the inner wall of the cutting cover.

[0016] Further, the glue-removing cotton is in initial state and right side of the glue-removing cotton is attached to the right side inner wall of the groove.

[0017] Further, the feeding mechanism is connected with the melt extrusion mechanism, and the driving speed of the first driving mechanism and the second driving mechanism is same.

[0018] Further, the melt extrusion mechanism comprises a melt bin fixedly connected to the upper end of the rack, and a spiral extrusion roller movably connected in the melt bin, a material sorting disc group movably connected to the right side in the melt bin, and a material distribution disc movably connected to the right side of the melt bin.

[0019] The first driving mechanism comprises a first driving motor fixedly connected to the left side front portion of the upper end of the rack, and a first belt disc movably connected to the left side of the first driving motor, and the right side rear portion of the first belt disc is movably connected with the spiral extrusion roller.

[0020] Further, the material sorting disc group comprises a cutting blade sleeved to the right portion of the spiral extrusion roller and a cutting disc, the cutting blade is fixedly connected with the spiral extrusion roller, the inner wall of the cutting disc is rotatably connected with the outer wall of the spiral extrusion roller, and the outer wall of the cutting disc is fixedly connected with the inner wall of the melt bin, and the surface of the adjacent cutting disc is provided with through holes of different shapes.

[0021] Further, the feeding mechanism comprises a feeding bin fixedly connected above the melt extrusion mechanism, a spiral feeding roller movably connected in the feeding bin, and a feeding bin fixedly connected to the right side of the upper end of the feeding bin.

[0022] The second driving mechanism comprises a second belt disc movably connected to the left side of the spiral feeding roller, and a second driving motor movably connected to the right side front portion of the second belt disc.

[0023] 3. Beneficial effects

[0024] Compared with the prior art, the application has the following advantages:

[0025] (1) When the blade cuts the material, the first tooth block on the blade and the second tooth block on the sleeve are engaged and rotated with the rotation of the cutter disc, so that the blade is driven to rotate along the outside of the cutter disc, the blade is displaced when cutting the material, and the sliding cutting is performed on the basis of the original pressure cutting, so that the force of the blade on the material is reduced, the blade cuts the material more easily, the material is prevented from being deformed by force, and the flatness of the cutting edge when the material is cut is ensured.

[0026] (2) The lubricating oil in the second tooth block is squeezed out through the oil injection port and sprayed on the surface of the blade through pressure, so that the surface of the blade is lubricated, the adhesion between the blade and the material is reduced, and the occurrence of the wire drawing phenomenon is reduced.

[0027] (3) the scheme separates the first tooth block from the second tooth block, and the first spring pushes the pressing plate to reset under the action, and the suction force is generated when the pressing plate resets, so that the lubricating oil in the sleeve is sucked into the inside of the second tooth block, and the automatic feeding function of the inside of the second tooth block is realized, and it should be noted that the lubricating oil in the second tooth block cannot flow back to the inside of the sleeve because the second tooth block and the sleeve are connected through the one-way valve. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the application;

[0029] Figure 2 It is a schematic diagram of the cross-sectional structure of the application;

[0030] Figure 3 It is a schematic diagram of the cutting mechanism structure of the application;

[0031] Figure 4 It is a schematic diagram of the combination structure of the cutter disc and the cutter bar of the application;

[0032] Figure 5 It is a schematic diagram of the internal structure of the second tooth block of the application;

[0033] Figure 6 It is a schematic diagram of the combination of the glue-removing cotton and the cutting cover of the application;

[0034] Figure 7 It is a schematic diagram of the cutting cover of the application;

[0035] Figure 8 It is an exploded schematic diagram of the material sorting disc group of the application.

[0036] Explanation of reference numerals in the drawing:

[0037] 1, rack; 2, melt extrusion mechanism; 21, melt bin; 22, spiral extrusion roller; 23, material sorting disc group; 231, cutting disc; 232, cutting blade; 24, material distribution disc; 3, first driving mechanism; 31, first driving motor; 32, first belt disc; 4, shaft coupling; 5, feeding mechanism; 51, feeding bin; 52, spiral feeding roller; 53, feeding bin; 6, second driving mechanism; 61, second driving motor; 62, second belt disc; 7, cutting mechanism; 71, cutting cover; 72, water ring; 73, rotating shaft; 74, fixed disc; 75, cutter disc; 76, cutter bar; 77, first tooth block; 78, second tooth block; 79, sleeve; 710, discharge pipe; 8, lubricating mechanism; 81, pressing plate; 82, seepage plate; 83, first spring; 84, one-way valve; 85, oil injection port; 86, groove; 87, glue-removing cotton; 88, pressure stabilizing plate; 89, second spring. DETAILED DESCRIPTION

[0038] With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be described clearly and completely; obviously, the described embodiments are only part of the embodiments of the present application, and not all the embodiments; based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative labor fall within the protection scope of the present application.

[0039] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0040] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "sleeved / connected", "connected" and the like should be understood broadly, for example, "connected" can be fixedly connected, or detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium; can be the communication inside two elements. For a person of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0041] Embodiment one:

[0042] Please refer to Figures 1-4 and Figure 8 A hot cutting and granulating device applied to the production of flame-retardant modified polyolefin, comprising a rack 1, the upper end of the rack 1 is fixedly connected with a melt extrusion mechanism 2, and the upper end of the rack 1 is fixedly connected with a first driving mechanism 3 on the left side of the melt extrusion mechanism 2, the upper parts of the melt extrusion mechanism 2 and the first driving mechanism 3 are respectively fixedly connected with a feeding mechanism 5 and a second driving mechanism 6, the melt extrusion mechanism 2 and the first driving mechanism 3 and the feeding mechanism 5 and the second driving mechanism 6 are all movably connected with a shaft coupling 4, and the right side of the melt extrusion mechanism 2 is movably connected with a cutting mechanism 7;

[0043] The cutting mechanism 7 comprises a cutting cover 71 movably connected to the right side of the melt extrusion mechanism 2, and a rotating motor is fixedly connected to the right side of the cutting cover 71; a water ring 72 is fixedly connected to the middle of the inner wall of the cutting cover 71; a rotating shaft 73 is movably connected to the middle of the inner wall of the right side of the cutting cover 71, and the right side of the rotating shaft 73 is fixedly connected with the output shaft of the rotating motor; a fixed disc 74 is fixedly connected to the left side of the rotating shaft 73; a cutter disc 75 is fixedly connected to the right side of the front and rear ends of the fixed disc 74; a cutter bar 76 is movably connected to the ring side of the cutter disc 75; a first tooth block 77 is fixedly connected to the right side of the cutter bar 76 at equal intervals; a sleeve 79 is fixedly connected to the outer wall of the left side of the sleeve 79; a second tooth block 78 is fixedly connected to the outer wall of the left side of the sleeve 79 at equal intervals; the second tooth block 78 is engaged with the first tooth block 77; and a discharge pipe 710 is fixedly connected to the lower end of the cutting cover 71.

[0044] The feeding mechanism 5 is communicated with the melt extrusion mechanism 2, and the driving speed of the first driving mechanism 3 is the same as that of the second driving mechanism 6.

[0045] The melt extrusion mechanism 2 comprises a melt bin 21 fixedly connected to the upper end of the rack 1, and a spiral extrusion roller 22 movably connected in the interior of the melt bin 21; a material sorting disc group 23 is movably connected to the right side in the interior of the melt bin 21; and a material distribution disc 24 is movably connected to the right side of the melt bin 21.

[0046] The first driving mechanism 3 comprises a first driving motor 31 fixedly connected to the left side of the front part of the upper end of the rack 1, and a first belt disc 32 movably connected to the left side of the first driving motor 31; and the right side rear part of the first belt disc 32 is movably connected with the spiral extrusion roller 22.

[0047] The material sorting disc group 23 comprises a cutting blade 232 and a cutting disc 231 sleeved to the right part of the spiral extrusion roller 22; the cutting blade 232 is fixedly connected with the spiral extrusion roller 22; the inner wall of the cutting disc 231 is rotatably connected with the outer wall of the spiral extrusion roller 22; the outer wall of the cutting disc 231 is fixedly connected with the inner wall of the melt bin 21; and different-shaped through holes are formed in the surface of the cutting disc 231.

[0048] The feeding mechanism 5 comprises a feeding bin 51 fixedly connected above the melt extrusion mechanism 2; a spiral feeding roller 52 is movably connected in the interior of the feeding bin 51; and a feeding bin 53 is fixedly connected to the right side of the upper end of the feeding bin 51.

[0049] The second driving mechanism 6 comprises a second belt disc 62 movably connected to the left side of the spiral feeding roller 52; and a second driving motor 61 is movably connected to the right side front part of the second belt disc 62.

[0050] Specifically, first, the raw materials are put into the inside of the feeding bin 51 through the feeding bin 53, then the second driving motor 61 drives the spiral feeding roller 52 to rotate by the second belt disc 62, the raw materials in the feeding bin 51 are transported to the inside of the melting bin 21 by the spiral feeding roller 52, the raw materials are melted by the melting bin 21, then the first driving motor 31 drives the spiral extruding roller 22 to rotate by the first belt disc 32, the melted raw materials are transported to the material sorting disc group 23 by the spiral extruding roller 22 for material sorting, then the extruded materials are extruded by the material distribution disc 24, finally, the extruded materials are cut by the cutting mechanism 7.

[0051] When the materials reach the material sorting disc group 23, the cutting blade 232 is driven to rotate synchronously by the spiral extruding roller 22, the materials are extruded into the through hole on the cutting disc 231 by the cutting blade 232, so that the bubbles in the materials are broken by the cutting blade 232, avoiding the deformation of the cut particles caused by the bubbles in the materials, and ensuring the cutting completeness.

[0052] When the materials are extruded by the material distribution disc 24, the rotating motor drives the rotating shaft 73 to rotate, the rotating shaft 73 drives the fixed disc 74, the cutter disc 75 and the cutter strip 76 to rotate synchronously, so that the extruded materials are cut into particles by the cutter strip 76, and at the same time, the water ring 72 sprays cooling water to cool the materials, helping the materials to cool and solidify quickly.

[0053] When the cutter strip 76 cuts the materials, the first tooth block 77 on the cutter strip 76 meshes with the second tooth block 78 on the sleeve 79 to rotate, so as to drive the cutter strip 76 to rotate along the outside of the cutter disc 75, so that the cutter strip 76 is displaced when cutting the materials, and the cutting force of the cutter strip 76 on the materials is reduced, so that the cutter strip 76 can cut the materials more easily, avoiding the deformation of the materials under stress, ensuring the flatness of the cutting edge when the materials are cut into particles, and finally the cut material particles are discharged from the discharge pipe 710 under the action of the water flow sprayed by the water ring 72.

[0054] Please refer to Figure 4 and Figure 5 , the inside of the second tooth block 78 is provided with a lubricating mechanism 8, the lubricating mechanism 8 comprises a pressing plate 81 movably connected to the contact surface of the second tooth block 78 and the first tooth block 77, the inside of the second tooth block 78 is fixedly connected with a seepage plate 82, and the seepage plate 82 and the pressing plate 81 are fixedly connected with the first spring 83, the second tooth block 78 and the sleeve 79 are fixedly connected with the one-way valve 84, the left side of the second tooth block 78 is provided with an oil injection port 85, and the inside of the sleeve 79 is filled with lubricating oil.

[0055] The elastic force of the first spring 83 is greater than the friction force between the pressing plate 81 and the second tooth block 78, the inside of the oil injection port 85 is provided with a pressure valve, and the pressure of the pressure valve is less than the hydraulic pressure generated when the pressing plate 81 is compressed into the inside of the second tooth block 78.

[0056] Specifically, when the first tooth block 77 is in contact with the second tooth block 78, the first tooth block 77 and the second tooth block 78 are pressed against each other to generate a force, and the pressing plate 81 on the second tooth block 78 is shrunk into the inside of the second tooth block 78 after being pressed by the first tooth block 77, so that the volume inside the second tooth block 78 is reduced, and the pressure inside the second tooth block 78 is increased, and the lubricating oil in the second tooth block 78 is squeezed out through the oil injection port 85 by pressure and sprayed on the surface of the blade 76, realizing the lubrication of the surface of the blade 76, reducing the adhesion between the blade 76 and the material, and reducing the occurrence of the phenomenon of drawing wire, and then when the first tooth block 77 and the second tooth block 78 are separated, the pressing plate 81 is reset under the action of the first spring 83, and the suction force is generated when the pressing plate 81 is reset, so that the lubricating oil in the inside of the sleeve 79 is sucked into the inside of the second tooth block 78, realizing the function of automatic replenishment of the inside of the second tooth block 78. It should be noted that since the second tooth block 78 and the sleeve 79 are connected through the one-way valve 84, the lubricating oil in the second tooth block 78 will not flow back to the inside of the sleeve 79.

[0057] Embodiment two:

[0058] Please refer to Figure 3 , Figure 6 and Figure 7 , the lubricating mechanism 8 further comprises a groove 86 opened in the left side inner wall of the cutting cover 71, the left side inner wall of the groove 86 is fixedly connected with a glue removing cotton 87, the inside of the glue removing cotton 87 is provided with an air bag, and the surface of the air bag is provided with a pressure hole, the inside left side of the cutting cover 71 is hollow;

[0059] The inside left side of the cutting cover 71 is slidably connected with a pressure stabilizing plate 88, and the left side of the pressure stabilizing plate 88 is fixedly connected with the left side inner wall of the cutting cover 71 through a second spring 89; the right side of the glue removing cotton 87 in the initial state is fitted with the right side inner wall of the groove 86.

[0060] Specifically, by opening the groove 86 in the inner wall of the cutting cover 71, and the end of the blade 76 extends into the inside of the groove 86, since the right side of the glue removing cotton 87 is fitted with the right side inner wall of the groove 86 in the initial state, the glue removing cotton 87 forms clamping and wrapping around the blade 76, so that the blade 76 is rubbed with the glue removing cotton 87 when rotating, thereby scraping off the material adhered to the surface of the blade 76 by the glue removing cotton 87, avoiding the decrease of sharpness of the blade 76 due to being wrapped by the material, at the same time, the groove 86 is filled with the glue removing cotton 87, which can prevent the cut particles from falling into the groove 86 to hinder the rotation of the blade 76;

[0061] On this basis, when the blade 76 rotates through the groove 86, the absorbent cotton 87 at the extrusion contact position is extruded by the blade 76, so that the absorbent cotton 87 is extruded and shrunk, the volume of the hollow part on the left side inside the cutting cover 71 is reduced, and then the pressure in the hollow part is increased, the lubricating oil in the hollow part is extruded by the pressure, and after the lubricating oil is extruded, it is adsorbed by the absorbent cotton 87. With the rotation of the blade 76, the lubricating oil can be evenly coated on the surface of the blade 76 by the absorbent cotton 87, so as to realize the lubrication of the surface of the blade 76, reduce the adhesion between the blade 76 and the material, and reduce the generation of the wire drawing phenomenon. At the same time, when the lubricating oil in the hollow part is reduced, the pressure plate 88 is pushed to move to the direction of the absorbent cotton 87 under the action of the second spring 89, so that the lubricating oil between the pressure plate 88 and the absorbent cotton 87 is always in a full state, ensuring that the part of the hollow part filled with lubricating oil is constant, so that the lubricating oil can be stably sprayed after the absorbent cotton 87 is extruded.

[0062] Working principle

[0063] Firstly, the raw materials are put into the inside of the feeding bin 51 through the feeding bin 53, and then the second driving motor 61 drives the spiral feeding roller 52 to rotate by using the second belt disc 62, the raw materials in the feeding bin 51 are transported to the inside of the melting bin 21 by the spiral feeding roller 52, the raw materials are melted by the melting bin 21, then the first driving motor 31 drives the spiral extruding roller 22 to rotate by using the first belt disc 32, the melted raw materials are transported to the material sorting disc group 23 by the spiral extruding roller 22, and then the extruded materials are cut by the cutting mechanism 7.

[0064] When the materials reach the material sorting disc group 23, the cutting blade 232 is driven to rotate synchronously by the spiral extruding roller 22, the materials are extruded into the through hole on the cutting disc 231 by the cutting blade 232, so that the bubbles contained in the materials are broken by the cutting blade 232, avoiding the appearance of abnormal particles caused by the bubbles contained in the materials, and ensuring the cutting completeness.

[0065] When the materials are extruded by the material distribution disc 24, the rotating motor drives the rotating shaft 73 to rotate, the rotating shaft 73 drives the fixed disc 74, the cutter disc 75 and the blade 76 to rotate synchronously, so that the extruded materials are cut into particles by the blade 76, and at the same time, the water ring 72 sprays cooling water to cool the materials, helping the materials to cool and solidify quickly.

[0066] When the blade 76 cuts the material, the first tooth block 77 on the blade 76 meshes with the second tooth block 78 on the sleeve 79 to rotate, thereby driving the blade 76 to rotate along the outer side of the cutter head 75, so that the blade 76 is displaced when cutting the material, and sliding cutting is performed on the basis of original pressure cutting, thereby reducing the force of the blade 76 on the material, so that the blade 76 more easily cuts the material, avoids deformation of the material under stress, guarantees the flatness of the cutting edge when the material is cut, and finally the cut material particles are discharged from the discharge pipe 710 under the action of the water flow sprayed by the water ring 72;

[0067] When the first tooth block 77 contacts the second tooth block 78, the first tooth block 77 and the second tooth block 78 will be extruded to generate a force, and the pressing plate 81 on the second tooth block 78 will shrink inward after being extruded by the first tooth block 77, so that the internal volume of the second tooth block 78 is reduced, thereby increasing the internal pressure of the second tooth block 78, and the lubricating oil in the second tooth block 78 is extruded out of the oil injection port 85 and sprayed on the surface of the blade 76 through the pressure, thereby realizing lubrication of the surface of the blade 76, reducing the adhesion between the blade 76 and the material, and thereby reducing the occurrence of wire drawing, and then when the first tooth block 77 and the second tooth block 78 are separated, the pressing plate 81 is reset under the action of the first spring 83, and the pressing plate 81 generates suction when it is reset, thereby sucking the lubricating oil in the sleeve 79 into the interior of the second tooth block 78, thereby realizing the function of automatic replenishment of the second tooth block 78. It should be noted that, since the second tooth block 78 and the sleeve 79 are connected through the one-way valve 84, the lubricating oil in the second tooth block 78 will not flow back to the interior of the sleeve 79.

[0068] The above merely describes the preferred embodiments of the present application; however, the protection scope of the present application is not limited thereto. Any person skilled in the art can make equivalent replacements or changes to the technical solutions and improved concepts of the present application within the technical range disclosed by the present application, and all of the above should be covered within the protection scope of the present application.

Claims

1. A hot cut pelletizing apparatus applied to the production of flame-retardant modified polyolefins, comprising a frame (1), characterized in that: The upper end of the rack (1) is fixedly connected with a melt extrusion mechanism (2), and the upper end of the rack (1) is fixedly connected with a first driving mechanism (3) on the left side of the melt extrusion mechanism (2), the upper end of the melt extrusion mechanism (2) is fixedly connected with a feeding mechanism (5) and a second driving mechanism (6), respectively, the melt extrusion mechanism (2) and the first driving mechanism (3) and the feeding mechanism (5) and the second driving mechanism (6) are movably connected with a shaft coupling (4), and the right side of the melt extrusion mechanism (2) is movably connected with a pelletizing mechanism (7). The pelletizing mechanism (7) comprises a cutting cover (71) movably connected to the right side of the melt extrusion mechanism (2), and the right side of the cutting cover (71) is fixedly connected with a rotary motor, the inner wall of the cutting cover (71) is fixedly connected with a water ring (72), the right side of the inner wall of the cutting cover (71) is movably connected with a rotating shaft (73), and the right side of the rotating shaft (73) is fixedly connected with the output shaft of the rotary motor and penetrates the cutting cover (71), the left side of the rotating shaft (73) is fixedly connected with a fixed disc (74), and the right side of the fixed disc (74) is fixedly connected with a cutter disc (75) at the front and rear ends, the cutter disc (75) is movably connected with a cutter bar (76) on the ring side, the right side of the cutter bar (76) is fixedly connected with a first tooth block (77) at equal intervals, the right side of the inner wall of the cutting cover (71) is fixedly connected with a sleeve (79) outside the rotating shaft (73), and the outer wall of the sleeve (79) is fixedly connected with a second tooth block (78) at equal intervals on the left side, the second tooth block (78) is engaged with the first tooth block (77), and the lower end of the cutting cover (71) is fixedly connected with a discharge pipe (710); the inside of the second tooth block (78) is provided with a lubricating mechanism (8), the lubricating mechanism (8) comprises a pressing plate (81) movably connected to the contact surface of the second tooth block (78) and the first tooth block (77), the inside of the second tooth block (78) is fixedly connected with a seepage plate (82), and the first spring (83) is fixedly connected between the seepage plate (82) and the pressing plate (81), the second tooth block (78) and the sleeve (79) are fixedly connected with a one-way valve (84), the left side of the second tooth block (78) is provided with an oil injection port (85), and the inside of the sleeve (79) is filled with lubricating oil.

2. A hot cut granulator apparatus for producing flame-retardant modified polyolefins according to claim 1, characterized in that: The elastic force of the first spring (83) is greater than the friction force between the pressing plate (81) and the second tooth block (78), the inside of the oil injection port (85) is provided with a pressure valve, and the pressure of the pressure valve is less than the hydraulic pressure generated when the pressing plate (81) is compressed into the inside of the second tooth block (78).

3. A hot cut prilling apparatus for producing flame-retardant modified polyolefins according to claim 1, characterized in that: The lubricating mechanism (8) further comprises a groove (86) formed in the left side of the inner wall of the cutting cover (71), the left side of the inner wall of the groove (86) is fixedly connected with a glue-removing cotton (87), the inside of the glue-removing cotton (87) is provided with an air bag, and the surface of the air bag is provided with a pressure hole, and the inside of the cutting cover (71) is hollow.

4. The hot cut pelletizing apparatus for producing flame-retardant modified polyolefin according to claim 3, wherein: The left side of the stable voltage plate (88) is fixedly connected with the left inner wall of the cutting cover (71), and the second spring (89) is fixedly connected between the left side of the stable voltage plate (88) and the left side inner wall of the cutting cover (71).

5. A hot cut pelletizing apparatus for producing flame-retardant modified polyolefin according to claim 3, characterized in that: The right side of the glue-removing cotton (87) is in initial state and is attached to the right inner wall of the groove (86).

6. A hot cut prilling apparatus for the production of flame-retardant modified polyolefins according to claim 1, characterized in that: The feeding mechanism (5) is connected with the melting extrusion mechanism (2), and the driving speed of the first driving mechanism (3) is same with that of the second driving mechanism (6).

7. A hot cut prilling apparatus for the production of flame-retardant modified polyolefins according to claim 1, characterized in that: The melting extrusion mechanism (2) comprises a melting material bin (21) fixedly connected to the upper end of the rack (1), and a spiral material extruding roller (22) movably connected in the melting material bin (21), a material sorting disc group (23) movably connected to the right side in the melting material bin (21), and a material distributing disc (24) movably connected to the right side of the melting material bin (21). The first driving mechanism (3) comprises a first driving motor (31) fixedly connected to the left side front portion of the upper end of the rack (1), and a first belt disc (32) movably connected to the left side of the first driving motor (31), and the right side rear portion of the first belt disc (32) is movably connected with the spiral material extruding roller (22).

8. A hot cut pelletizing apparatus applied to the production of flame-retardant modified polyolefins according to claim 7, characterized in that: The material sorting disc group (23) comprises a cutting blade (232) and a cutting disc (231) sleeved to the right portion of the spiral material extruding roller (22), the cutting blade (232) is fixedly connected with the spiral material extruding roller (22), the inner wall of the cutting disc (231) is rotatably connected with the outer wall of the spiral material extruding roller (22), the outer wall of the cutting disc (231) is fixedly connected with the inner wall of the melting material bin (21), and through holes with different shapes are arranged on the surface of the cutting disc (231).

9. A hot cut prilling apparatus for producing flame-retardant modified polyolefins according to claim 1, characterized in that: The feeding mechanism (5) comprises a feeding bin (51) fixedly connected above the melting extrusion mechanism (2), a spiral feeding roller (52) movably connected in the feeding bin (51), and a feeding bin (53) fixedly connected to the right side of the upper end of the feeding bin (51). The second driving mechanism (6) comprises a second belt disc (62) movably connected to the left side of the spiral feeding roller (52), and a second driving motor (61) movably connected to the right side front portion of the second belt disc (62).

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