Granulating die head of granulating equipment

Abstract

The utility model relates to a granulating die head of granulating equipment, which comprises a forming die and a granulating assembly, and the granulating assembly is rotatably connected with the forming die; the pelletizing assembly comprises a pelletizing shell, a pelletizing motor, a rotating shaft pelletizing blade and a first conveying pipe; a containing cavity is formed in the pelletizing shell, the pelletizing motor is fixedly arranged on the pelletizing shell, a rotating shaft body is arranged in the containing cavity, the pelletizing blade is fixedly connected with the rotating shaft, the pelletizing blade is arranged in the containing cavity, the rotating shaft is a hollow pipe body, and the end, close to the pelletizing motor, of the rotating shaft is connected with a first water conveying pipe through a rotating connector; a plurality of first water permeable holes are formed in the other end of the rotating shaft. According to the device, after a molten plastic strip is extruded out of the extrusion mold, the plastic strip touches water sprayed out of the first water permeable holes and is preliminarily cooled; and then the rotating blade immediately cuts the plastic strips to cut out plastic particles, the cutting faces of the plastic particles are smooth, no powder particles are generated, and the finished product quality of the plastic particles is improved.

Description

Technical Field

[0001] This application relates to the technical field of plastic production, and particularly to a granulation die head of a pelletizing device. Background Art

[0002] A plastic granulator is a mechanical device that converts plastic raw materials into granular products through a series of technological processes such as heating, melting, extrusion, and cutting.

[0003] The working principle of a plastic granulator is as follows: Plastic raw materials are fed into the heating cylinder of the granulator. Under the rotation of the screw and the action of the heating element, the plastic gradually melts and reaches a temperature and viscosity suitable for extrusion. The molten plastic is pushed towards the extrusion head under the rotation and shearing action of the screw.

[0004] The pelletizing device of a plastic granulator includes a forming die and a pelletizing assembly. The forming die is fixedly arranged on the machine head, and several die holes are provided on the forming die; the molten plastic is extruded through the die holes of the forming die to form a continuous and uniform plastic strip; subsequently, the pelletizing assembly cuts the plastic strip into plastic pellets.

[0005] Before the pelletizing assembly cuts the plastic strip, it is necessary to cool the formed plastic strip so that the blades in the pelletizing assembly can cut the plastic strip into plastic pellets.

[0006] In the prior art, the formed plastic strip can be cooled through a water cooling tank to rapidly cool down and completely harden the plastic strip. However, the water cutting assembly cuts the completely hardened plastic strip, resulting in a rough cutting surface of the plastic pellets and easily generating powder particles, thereby affecting the product quality of the plastic pellets. Utility Model Content

[0007] In order to improve the production quality of plastic pellets, this application provides a granulation die head of a pelletizing device.

[0008] A granulation die head of a pelletizing device provided by this application adopts the following technical solutions:

[0009] A granulation die head of a pelletizing device includes a forming die and a pelletizing assembly, and the pelletizing assembly is rotatably connected to the forming die;

[0010] The forming die includes a forming shell and an extrusion die. The extrusion die is fixedly arranged on the forming shell. The forming shell is used for fixedly connecting with the machine head of the plastic granulator. The extrusion die is provided with several die holes for extruding plastic melt;

[0011] The granulation assembly includes a granulation housing, a granulation motor, a rotating shaft, granulation blades, and a first delivery pipe; one side of the granulation housing is rotatably connected to the molding housing, the other side of the granulation housing is fixedly connected to the molding housing, an accommodation cavity is provided inside the granulation housing, and there is a discharge port on the side of the granulation housing close to the ground for plastic particles to fall, and a feed port is provided on the side of the granulation housing close to the molding die for the extrusion die to pass through; the granulation motor is fixedly arranged on the granulation housing, the main body of the rotating shaft is arranged in the accommodation cavity, the granulation blades are fixedly connected to the rotating shaft, the granulation blades are arranged in the accommodation cavity for cutting plastic strips; the rotating shaft is a hollow tube body, and one end of the rotating shaft close to the granulation motor is connected to the first water delivery pipe through a rotary joint; several first water permeable holes are provided at the other end of the rotating shaft.

[0012] By adopting the above technical solution, when the molten plastic strip is extruded from the extrusion die, the plastic strip touches the water body ejected from the first water permeable holes and is initially cooled; then the rotary blade immediately cuts the plastic strip to cut out plastic particles. Since the plastic strip is not completely hardened at this time, the cutting surface of the plastic particles is smooth during the process of cutting the plastic strip into plastic particles by the granulation blades, and no powder particles are generated, improving the finished product quality of the plastic particles. At the same time, compared with the existing water cooling tank, the granulation equipment of the present application has a small floor area, which is beneficial to improving production efficiency.

[0013] Optionally, the molding die further includes a heating element sleeved on the outer periphery of the extrusion die for heating the extrusion die; there is a clearance between the heating element and the extrusion end of the extrusion die, and the heating element abuts against the granulation housing.

[0014] By adopting the above technical solution, by sleeving a heating component on the outer periphery of the extrusion die to heat the extrusion die, the influence of the granulation assembly on the molding die can be reduced, so that the liquid plastic can be smoothly extruded from the extrusion die.

[0015] Optionally, the granulation die head further includes an atomization assembly fixedly arranged in the accommodation cavity and arranged on the side of the rotating shaft close to the ground; the atomization assembly includes a fixed base and atomizers, the fixed base is fixedly connected to the granulation housing, and several atomizers are fixedly arranged on the fixed base.

[0016] By adopting the above technical solution, the atomizers atomize the large particle water body in the container cavity into small particle water bodies, so as to improve the full contact between the cut plastic particles and the water body and then completely harden.

[0017] Optionally, the virtual central axis of the atomizer intersects with the rotation area of the granulation blade.

[0018] By adopting the above technical solution, the atomizer is inclined to increase the probability of the plastic particles after pelletizing coming into contact with the water body.

[0019] Optionally, the atomizer includes a water storage cylinder, a sponge body, and an atomizing sheet; the water storage cylinder is fixedly connected to the fixed base; the sponge body is arranged inside the water storage cylinder, and the side wall of the water storage cylinder is provided with a water inlet hole. An insertion opening for inserting the atomizing sheet is provided on one side of the water storage cylinder away from the fixed base, and a fixing groove for accommodating the atomizing sheet is provided on the inner peripheral wall of the water storage cylinder. The insertion opening and the fixing groove are in the same plane, and the sponge body abuts against the atomizing sheet.

[0020] By adopting the above technical solution, the sponge body absorbs the water body in the water storage cylinder and transports the water body to the atomizing sheet; the atomizing sheet converts the water body in the sponge body into tiny droplets through high-speed vibration and sprays the atomized small liquid into the external environment to cool the plastic particles after cutting.

[0021] Optionally, a limiting rib is further provided on the inner peripheral wall of the water storage cylinder. The limiting rib is arranged on both sides of the fixing groove. The limiting rib is integrally formed with the water storage cylinder and abuts against the atomizing sheet.

[0022] By adopting the above technical solution, the position of the atomizing sheet is further fixed by the limiting rib to improve the stability of the installation of the atomizing sheet.

[0023] Optionally, the atomizer further includes a spring. The spring is arranged inside the water storage cylinder and on the side of the sponge body away from the atomizing sheet. The spring is used to force the sponge body to abut against the atomizing sheet.

[0024] By adopting the above technical solution, the spring is used to force the sponge body to abut against the atomizing sheet; thereby enabling the atomizing sheet to be immersed in the water body in the sponge body and improving the stability of the operation of the atomizing sheet.

[0025] Optionally, the granulation die head further includes a water adding component. The water adding component is arranged on the side of the rotating shaft away from the ground; the water adding component includes a second water delivery pipe and a water guide pipe. The water guide pipe is arranged inside the accommodating chamber, and the cutting particle housing is provided with a through hole for the second water delivery pipe to pass through. The second water delivery pipe is communicated with the water guide pipe, and a plurality of second water permeable holes are spacedly arranged on the water guide pipe.

[0026] By adopting the above technical solution, the cutting particle blade and the atomizing component are sprayed by the water adding component to increase the amount of water body in the accommodating chamber, so as to facilitate the contact between the plastic particles and the water body and improve the finished product quality of the plastic particles.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. When the molten plastic strip is extruded from the extrusion die, the plastic strip touches the water body ejected from the first water permeable holes and is preliminarily cooled; then the rotating blade immediately cuts the plastic strip to cut out plastic particles. Since the plastic strip is not completely hardened at this time, the cutting surface of the plastic particles is smooth and no powder particles are generated during the process of cutting the plastic strip into plastic particles by the granulating blade, improving the finished product quality of the plastic particles;

[0029] 2. When the water body is ejected from the first water permeable holes, part of the water body will splash onto the extrusion die; thereby reducing the temperature of the extrusion die and the plastic in the die holes; causing the molten material to harden in advance and affecting the extrusion of the liquid plastic. By sleeving a heating component around the outer periphery of the extrusion die to heat the extrusion die, the influence of the granulating component on the forming die can be reduced, so that the liquid plastic can be smoothly extruded from the extrusion die;

[0030] 3. The large particle water body in the container cavity is atomized into small particle water bodies by the atomizer, thereby improving the full contact between the cut plastic particles and the water body, so that the plastic particles are completely hardened, improving the stiffness of the plastic particles, and facilitating the subsequent vibration separation of the plastic particles from the water body. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic structural diagram of the granulating die head in the first state of Embodiment 1.

[0032] Figure 2 is a schematic structural diagram of the granulating die head in the second state of Embodiment 1.

[0033] Figure 3 is a schematic structural diagram of the granulating component in Embodiment 1.

[0034] Figure 4 is a schematic structural diagram of the granulating component in Embodiment 2.

[0035] Figure 5 is Figure 4 an enlarged view of part A in

[0036] Figure 6 is a schematic structural diagram of the atomizer in Embodiment 2.

[0037] Figure 7 is Figure 6 an enlarged view of part B in

[0038] Explanation of the reference numerals: 1. forming die; 11. forming shell; 12. extrusion die; 121. die hole; 13. heating element; 2. pelletizing assembly; 21. pelletizing shell; 211. accommodating chamber; 212. discharge port; 213. feed port; 22. pelletizing motor; 23. rotating shaft; 231. first water permeable hole; 24. pelletizing blade; 25. first water pipe; 3. atomizing assembly; 31. fixed base; 32. atomizer; 321. water storage cylinder; 3211. plug interface; 3212. fixed groove; 3213. limiting convex strip; 3214. water inlet hole; 322. atomizing sheet; 323. sponge; 324. spring; 4. water adding assembly; 41. second water pipe; 42. water guide pipe; 421. second water permeable hole. DETAILED DESCRIPTION

[0039] The following is combined with Figures 1-7 This application is described in further detail.

[0040] The present application embodiment discloses a pelletizing die head of a pelletizing device. Figure 1 and Figure 2 The pelletizing die head of the pelletizing equipment includes a forming die 1 and a pelletizing component 2, and the pelletizing component 2 is rotatably connected to the forming die 1.

[0041] Reference Figure 1 and Figure 2 The molding die 1 includes a molding shell 11, an extrusion die 12 and a heating element 13. The extrusion die 12 is fixedly mounted on the molding shell 11, and the molding shell 11 is used to be fixedly connected to the head of the plastic granulator. The extrusion die 12 is provided with a plurality of die holes 121 for extruding the plastic melt. The heating element 13 is sleeved on the outer periphery of the extrusion die 12, and the heating element 13 is used to heat the extrusion die 12; an avoidance gap is provided between the heating element 13 and the extrusion end of the extrusion die 12, and the heating element 13 is in contact with the pelletizing shell 21. The heating element 13 can heat the extrusion die 12 by electromagnetic heating, electric heating pipe, etc.

[0042] Reference Figures 1 to 3 The pelletizing assembly 2 includes a pelletizing shell 21, a pelletizing motor 22, a rotating shaft 23, a pelletizing blade 24 and a first conveying pipe.

[0043] Reference Figures 1 to 3 One side of the pelletizing shell 21 is rotatably connected to the molding shell 11, and the other side of the pelletizing shell 21 is fixedly connected to the molding shell 11. A accommodating cavity 211 is provided inside the pelletizing shell 21, and a discharge port 212 is provided on the side of the pelletizing shell 21 close to the ground, and the discharge port 212 is used for plastic pellets to fall. A feed port 213 is provided on the side of the pelletizing shell 21 close to the molding mold 1, and the feed port 213 is used for the extrusion mold 12 to pass through.

[0044] Reference Figures 1 to 3, the pelletizing motor 22 is fixedly arranged on the pelletizing housing 21. The main body of the rotating shaft 23 is arranged in the accommodating cavity 211. The pelletizing blade 24 is fixedly connected with the rotating shaft 23. The pelletizing blade 24 is arranged in the accommodating cavity 211 and is used for cutting plastic strips. The rotating shaft 23 is a hollow tube body. One end of the rotating shaft 23 close to the pelletizing motor 22 is connected with the first water delivery pipe 25 through a rotary joint. The other end of the rotating shaft 23 is hermetically arranged, and a plurality of first water permeable holes 231 are opened at the other end of the rotating shaft 23. Thus, the external water body passes through the first water delivery pipe 25 and the rotating shaft 23 in sequence, and is sprayed into the accommodating cavity 211 from the first water permeable holes 231 of the rotating shaft 23, so that the plastic strips are cooled by the water body.

[0045] In this embodiment, the first water permeable holes 231 are arranged on the side of the pelletizing blade 24 close to the molding die 1, so that the water body contacts the plastic strip prior to the pelletizing blade 24.

[0046] The implementation principle of the granulation die head of the pelletizing equipment in the embodiment of the present application is as follows:

[0047] Refer to Figures 1 to 3 , when the molten plastic strip is extruded from the extrusion die 12, the plastic strip contacts the water body sprayed from the first water permeable holes 231 and is preliminarily cooled. Subsequently, the rotary blade immediately cuts the plastic strip to cut out plastic particles. Since the plastic strip is not completely hardened at this time, during the process of the pelletizing blade 24 cutting the plastic strip into plastic particles, the cutting surface of the plastic particles is smooth and no powder particles are generated, improving the finished product quality of the plastic particles. At the same time, compared with the existing water cooling tank, the pelletizing equipment of the present application has a small floor area, which is beneficial to improving production efficiency.

[0048] Refer to Figures 1 to 3 , when the water body is sprayed out from the first water permeable holes 231, part of the water body will splash onto the extrusion die 12. Thus, the temperature of the plastic in the extrusion die 12 and the die holes 121 is reduced, and the molten material is hardened in advance, affecting the extrusion of the liquid plastic. By sleeving a heating component on the outer periphery of the extrusion die 12 to heat the extrusion die 12, the influence of the pelletizing component 2 on the molding die 1 can be reduced, so that the liquid plastic can be smoothly extruded from the extrusion die 12.

[0049] After the plastic strip is cut into plastic particles, the plastic particles contact the water body in the accommodating cavity 211 to be further cooled and hardened. Finally, the plastic particles and the water body fall together from the discharge port 212 and are conveyed to the vibration screening device through the conveying mechanism to separate the plastic particles from the water body. Finally, the plastic particles are sent to the drying equipment for drying.

[0050] Embodiment 2

[0051] The difference between this Embodiment 2 and Embodiment 1 is as follows:

[0052] Refer to Figure 4 The granulation die head further includes an atomization component 3 and a water addition component 4; the main bodies of the atomization component 3 and the water addition component 4 are both arranged in the accommodation cavity 211, and both the atomization component 3 and the water addition component 4 are fixedly connected to the pelletizing housing 21.

[0053] Refer to Figure 4 The atomization component 3 is arranged on the side of the rotating shaft 23 close to the ground; the atomization component 3 includes a fixed base 31 and atomizers 32. The fixed base 31 is fixedly connected to the pelletizing housing 21. There are several atomizers 32, and several atomizers 32 are fixedly arranged on the fixed base 31. The virtual central axis of the atomizer 32 intersects with the rotation area of the pelletizing blade 24.

[0054] In this embodiment, the atomizer 32 atomizes the large particle water body in the container cavity into small particle water bodies, so as to improve the full contact between the cut plastic particles and the water body, so that they are completely hardened, improve the stiffness of the plastic particles, and facilitate the subsequent vibration separation of the plastic particles and the water body. And the atomizer 32 is inclined, so that the small particle water body atomized by the atomizer 32 drifts towards the position of the pelletizing blade 24 to increase the probability of contact between the cut plastic particles and the water body.

[0055] Refer to Figures 4 to 7 Specifically, the atomizer 32 includes a water storage cylinder 321, a sponge body 323, an atomization sheet 322 and a spring 324. The water storage cylinder 321 is fixedly connected to the fixed base 31. The sponge body 323 is arranged in the water storage cylinder 321, and a water inlet hole 3214 is opened on the side wall of the water storage cylinder 321. An insertion port 3211 for inserting the atomization sheet 322 is opened on the side of the water storage cylinder 321 away from the fixed base 31, and a fixed groove 3212 for accommodating the atomization sheet 322 is opened on the inner peripheral wall of the water storage cylinder 321. The insertion port 3211 and the fixed groove 3212 are on the same plane, and the sponge body 323 abuts against the atomization sheet 322; a limiting rib 3213 is also arranged on the inner peripheral wall of the water storage cylinder 321. The limiting rib 3213 is arranged on both sides of the fixed groove 3212. The limiting rib 3213 is integrally formed with the water storage cylinder 321, and the limiting rib 3213 abuts against the atomization sheet 322.

[0056] Refer to Figures 4 to 7 The sponge body 323 absorbs the water body in the water storage cylinder 321 and transports the water body to the atomization sheet 322; the atomization sheet 322 converts the water body in the sponge body 323 into tiny droplets through high-speed vibration and sprays the atomized small liquid into the external environment to cool the cut plastic particles.

[0057] Refer to Figure 5 and Figure 6, the spring 324 is also disposed within the water storage cylinder 321, and the spring 324 is disposed on the side of the sponge body 323 away from the atomizing sheet 322. The spring 324 is used to force the sponge body 323 into abutment with the atomizing sheet 322. The spring 324 is used to force the sponge body 323 into abutment with the atomizing sheet 322, so that the atomizing sheet 322 can be immersed in the water in the sponge body 323, improving the working stability of the atomizing sheet 322.

[0058] Referring to Figure 4 , the water adding assembly 4 is disposed on the side of the rotating shaft 23 away from the ground; the water adding assembly 4 includes a second water delivery pipe 41 and a water guide pipe 42. The water guide pipe 42 is disposed within the accommodation chamber 211, and the pelletizing housing 21 is provided with a through hole for the second water delivery pipe 41 to pass through. The second water delivery pipe 41 is communicated with the water guide pipe 42, and the water guide pipe 42 is provided with a plurality of second water permeable holes 421 at intervals. The pelletizing blade 24 and the atomizing assembly 3 are sprayed by the water adding assembly 4 to increase the amount of water in the accommodation chamber 211, facilitating the contact between the plastic pellets and the water and improving the finished product quality of the plastic pellets.

[0059] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A pelletizing die head for a pelletizing device, characterized in that: The invention comprises a molding die (1) and a pelletizing assembly (2), wherein the pelletizing assembly (2) is rotatably connected to the molding die (1); the molding die (1) comprises a molding shell (11) and an extrusion die (12), wherein the extrusion die (12) is fixedly mounted on the molding shell (11), the molding shell (11) is used to be fixedly connected to the head of a plastic pelletizing machine, and the extrusion die (12) is provided with a plurality of die holes (121) for extruding plastic melt; the pelletizing assembly (2) comprises a pelletizing shell (21), a pelletizing motor (22), and a rotating shaft (23). , a pelletizing blade (24) and a first conveying pipe; one side of the pelletizing shell (21) is rotatably connected to the molding shell (11), and the other side of the pelletizing shell (21) is fixedly connected to the molding shell (11); a receiving cavity (211) is provided inside the pelletizing shell (21), and a discharge port (212) is provided on the side of the pelletizing shell (21) close to the ground, and the discharge port (212) is used for plastic pellets to fall; a feed port (213) is provided on the side of the pelletizing shell (21) close to the molding die (1), and the feed port (213) is used for the extrusion die (12) to pass through; the The pelletizing motor (22) is fixedly mounted on the pelletizing housing (21); the main body of the rotating shaft (23) is arranged in the accommodating cavity (211); the pelletizing blade (24) is fixedly connected to the rotating shaft (23); the pelletizing blade (24) is arranged in the accommodating cavity (211); and the pelletizing blade (24) is used for cutting plastic strips; the rotating shaft (23) is a hollow tube; one end of the rotating shaft (23) close to the pelletizing motor (22) is connected to a first water pipe (25) via a rotating joint; and the other end of the rotating shaft (23) is provided with a plurality of first water permeable holes (231).

2. The granulation die head of the granulation equipment according to claim 1, characterized in that: The molding die (1) further comprises a heating element (13), the heating element (13) being sleeved on the outer circumference of the extrusion die (12), the heating element (13) being used to heat the extrusion die (12); an avoidance gap is provided between the heating element (13) and the extrusion end of the extrusion die (12), and the heating element (13) is in contact with the pelletizing shell (21).

3. The granulation die head of the granulation equipment according to claim 1, characterized in that: The pelletizing die head further comprises an atomizing assembly (3), the atomizing assembly (3) being fixedly arranged in the accommodating cavity (211), and the atomizing assembly (3) being arranged on the side of the rotating shaft (23) close to the ground; the atomizing assembly (3) comprises a fixed base (31) and an atomizer (32), the fixed base (31) being fixedly connected to the pelletizing shell (21), and a plurality of the atomizers (32) being provided, and the plurality of the atomizers (32) being fixedly arranged on the fixed base (31).

4. The granulation die head of the granulation equipment according to claim 3, characterized in that: The virtual central axis of the atomizer (32) intersects with the rotation area of ​​the pelletizing blade (24).

5. The granulation die head of the granulation equipment according to claim 3, characterized in that: The atomizer (32) comprises a water storage cylinder (321), a sponge (323) and an atomizing sheet (322); the water storage cylinder (321) is fixedly connected to the fixed base (31); the sponge (323) is arranged in the water storage cylinder (321), and a water inlet hole (3214) is provided on a side wall of the water storage cylinder (321); a plug-in interface (3211) for plugging the atomizing sheet (322) is provided on a side of the water storage cylinder (321) away from the fixed base (31), and a fixed groove (3212) for accommodating the atomizing sheet (322) is provided on an inner peripheral wall of the water storage cylinder (321); the plug-in interface (3211) and the fixed groove (3212) are located on the same plane, and the sponge (323) is in contact with the atomizing sheet (322).

6. The granulation die head of the granulation equipment according to claim 5, characterized in that: The inner peripheral wall of the water storage cylinder (321) is further provided with a limiting convex strip (3213), the limiting convex strip (3213) is arranged on both sides of the fixing groove (3212), the limiting convex strip (3213) and the water storage cylinder (321) are integrally formed, and the limiting convex strip (3213) abuts against the atomizing sheet (322).

7. The granulation die head of the granulation equipment according to claim 6, characterized in that: The atomizer (32) further comprises a spring (324), wherein the spring (324) is arranged in the water storage cylinder (321), and the spring (324) is arranged on a side of the sponge (323) away from the atomizing sheet (322), and the spring (324) is used to force the sponge (323) to abut against the atomizing sheet (322).

8. The granulation die head of the granulation equipment according to claim 3, characterized in that: The pelletizing die head further comprises a water adding assembly (4), the water adding assembly (4) being arranged on the side of the rotating shaft (23) away from the ground; the water adding assembly (4) comprises a second water delivery pipe (41) and a water guide pipe (42), the water guide pipe (42) being arranged in the accommodating chamber (211), and the pelletizing shell (21) being provided with a through hole for the second water delivery pipe (41) to pass through, the second water delivery pipe (41) being connected to the water guide pipe (42), and the water guide pipe (42) being provided with a plurality of second water permeable holes (421) at intervals.

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