A color master batch mixing pre-particle crushing mechanism

Abstract

The application discloses a color master batch pre-mixing particle crushing mechanism and belongs to the field of plastic film production, which is used for plastic film production and comprises a support frame body and an outer shaft body rotating connection, an outer shaft body driving wheel driving a crushing inner cylinder to rotate through the outer shaft body; the crushing inner cylinder and the crushing outer cylinder are coaxially arranged, the crushing outer cylinder is provided with a trumpet-shaped feeding port at the top end and an outer cylinder bottom hole at the bottom end; a gap is left between the crushing inner cylinder and the crushing outer cylinder, the gap corresponding to the outer wall of the crushing inner cylinder is provided with an inner cylinder outer spiral tooth and an inner cylinder sieve hole; the bottom of the crushing inner cylinder is provided with an inner cylinder bottom hole; a bottom end gap for arranging a discharge inclined plate is left between the crushing inner cylinder and the crushing outer cylinder; the inner shaft body is provided with a plurality of crushing knife connecting rods connected with crushing knives, the cutting edge part of the crushing knife is in contact with the inner wall of the crushing inner cylinder; and the inner shaft body is connected with an inner shaft body driving wheel after penetrating through the outer shaft body. The application improves the crushing effect and efficiency of plastic particles by improving the crushing structure, simplifying the transmission form and facilitating the subsequent heating and melting of smaller plastic particles.

Description

Technical Field

[0001] This application belongs to the field of plastic film production, and more specifically, it relates to a particle crushing mechanism before masterbatch mixing. Background Technology

[0002] Color masterbatch refers to a high-concentration color mixture containing a large amount of pigment or dye and formulated with resin raw materials, forming aggregates of pigment or dye uniformly attached to the resin. Generally, during processing, adding a certain amount of color masterbatch and uncolored resin allows for the production of colored film products with the designed color concentration. However, before or after mixing the color masterbatch and uncolored resin, the particle size of both materials needs to be standardized to ensure a consistent color distribution in the produced film and to avoid defects caused by unmelted particles. Therefore, a crushing process is required before melting and mixing the color masterbatch and uncolored resin particles.

[0003] See Chinese Patent Publication No. CN110901112A for a processing system of plastic film. The system uses a plastic crushing mechanism to fully and repeatedly crush plastic particles, breaking larger plastic particles into smaller ones. The smaller plastic particles are then heated and melted, and the process is continuously stirred to ensure uniform heating of the smaller plastic particles. This helps to ensure that the molded plastic does not contain any incompletely melted plastic particles and that the composition of the molded plastic particles is uniform.

[0004] Furthermore, the crushing mechanism disclosed in patent document CN110901112A uses a telescopic transmission mechanism to drive the rotation of three crushing blades to crush the plastic particles in the crushing cylinder. At the same time, the particle crushing mechanism is activated to drive the three crushing blades to move up and down to more thoroughly crush the plastic particles in the crushing cylinder, so as to crush the large particles in the crushing cylinder into small particles that fall into the inverted cone-shaped heating chamber for heating and melting. The telescopic transmission mechanism heats the plastic particles to make them heat evenly.

[0005] However, the reciprocating telescopic structure of the crusher blade drive may miss some parts during the crushing process, resulting in an unsatisfactory crushing effect. Secondly, the transmission mechanism of the reciprocating telescopic structure is relatively complex, and the drive structure and rotation speed need to be precisely matched to achieve the ideal crushing effect, which is relatively complex. Summary of the Invention

[0006] The purpose of this application is to provide a particle crushing mechanism before masterbatch mixing, which can simplify the transmission form and achieve secondary crushing of plastic particles by improving the crushing structure, without adopting a lifting and reciprocating motion structure, thereby improving the crushing effect and efficiency of plastic particles and facilitating the subsequent heating and melting of smaller plastic particles.

[0007] To achieve the above objectives, this application employs the following technical solution:

[0008] The particle crushing mechanism for color masterbatch before mixing described in this application includes a support frame, an outer shaft connected to the support frame via a bearing structure, an outer shaft drive wheel fixedly connected to the top of the outer shaft, and a bottom end of the outer shaft communicating with an inner crushing cylinder. The inner crushing cylinder is located inside the outer crushing cylinder and is coaxially arranged with it. The top end of the outer crushing cylinder is a trumpet-shaped inlet, and the bottom end of the outer crushing cylinder has a bottom hole communicating with the interior of the outer crushing cylinder. A gap for crushing plastic particles is left between the outer wall of the inner crushing cylinder and the inner wall of the outer crushing cylinder. A plurality of inner cylinder outer spiral teeth are distributed on the outer wall of the inner crushing cylinder corresponding to the gap for crushing plastic particles, and a plurality of inner cylinder outer spiral teeth are distributed on the side wall of the inner crushing cylinder corresponding to the inner cylinder outer spiral teeth. The inner cylinder has a sieve hole that communicates with the internal chamber of the crushing inner cylinder. The bottom of the crushing inner cylinder also has a bottom hole that communicates with the internal chamber of the crushing inner cylinder. A bottom gap exists between the bottom end of the inner cylinder and the bottom end of the outer cylinder, and several discharge inclined plates are installed within this gap, fixedly connected to the inner shaft. Several radially distributed crushing blade connecting rods are installed on the inner shaft within the crushing inner cylinder, fixedly connected to the crushing blades, with the cutting edges of the crushing blades contacting the inner wall of the crushing inner cylinder. The inner shaft extends through the outer shaft at the top of the crushing inner cylinder and connects to the inner shaft drive wheel. A cylinder bearing is installed at the connection point between the inner and outer shafts.

[0009] As one of the preferred technical solutions of this application, the inner wall of the trumpet-shaped feed inlet is provided with a plurality of inner guide ribs, the inner guide ribs are fixed together with the trumpet-shaped feed inlet and extend to the connection position between the trumpet-shaped feed inlet and the outer crushing cylinder; the outer wall of the inner guide ribs is provided with a plurality of inlet support ribs at the connection position between the outer wall of the inner guide ribs and the outer crushing cylinder, the bottom end of the inlet support ribs is fixedly connected to the annular bottom plate, and the annular bottom plate is located on the outer wall of the outer crushing cylinder.

[0010] As one of the preferred technical solutions of this application, the inner crushing cylinder has an inner conical section, and the bottom end of the inner conical section has an inner cylinder bottom hole; the bottom end of the outer crushing cylinder has an outer conical section, and the outer cylinder bottom hole is located at the bottom end of the outer conical section; a gap for crushing plastic particles is left between the outer wall of the inner conical section and the inner wall of the outer conical section, and a number of secondary crushing teeth are distributed on the outer wall of the inner conical section.

[0011] As one of the preferred technical solutions of this application, the secondary crushing teeth are spiral protrusions, and the density of the secondary crushing teeth is greater than that of the outer spiral teeth of the inner cylinder. The gap between the outer end face of the secondary crushing teeth and the inner wall of the conical section of the outer cylinder is smaller than the gap between the outer end face of the outer spiral teeth of the inner cylinder and the inner wall of the crushing outer cylinder.

[0012] As one of the preferred technical solutions of this application, the crushing inner cylinder is provided with a spiral feeding plate inside the conical section of the inner cylinder. The spiral feeding plate is fixed to the inner shaft at the position of the conical section of the inner cylinder and rotates with the rotation of the inner shaft.

[0013] As one of the preferred technical solutions of this application, the crushing inner cylinder includes a cylindrical section with a hollow cylindrical structure. The outer wall of the cylindrical section is distributed with a plurality of inner cylinder outer helical teeth, and a plurality of inner cylinder sieve holes are distributed on the cylindrical section between adjacent inner cylinder outer helical teeth. The top opening of the cylindrical section is sealed by a top conical section, and the bottom opening of the cylindrical section is sealed by an inner cylinder conical section. The inner cylinder conical section has a bottom surface, and the bottom surface of the inner cylinder conical section is provided with an inner cylinder bottom hole. The top of the top conical section is fixedly connected to the outer shaft.

[0014] As one of the preferred technical solutions of this application, the connection position between the top conical section and the cylindrical section is flush with the connection position between the funnel-shaped feed inlet and the crushing outer cylinder.

[0015] Compared with the prior art, the beneficial effects of this application are:

[0016] This application sets up a crushing inner cylinder and a crushing outer cylinder that move relative to each other, and sets up structures such as an outer spiral tooth, a screen hole, and a secondary crushing tooth in the gap between the inner and outer cylinders. These structures work in conjunction with the crushing blades in the inner cylinder to crush larger-diameter plastic particles, improve the crushing effect of plastic particles, and reduce the problems that may arise from the reciprocating lifting method, such as high precision requirements, complex transmission and coordination, and increased omission rate. This ensures the subsequent melting of plastic particles. Attached Figure Description

[0017] Figure 1 This is the three-dimensional representation of the present application. Figure 1 .

[0018] Figure 2 This is the three-dimensional representation of the present application. Figure 2 .

[0019] Figure 3 This is a top view of this application.

[0020] Figure 4 yes Figure 3 A sectional view of section AA.

[0021] Figure 5This is a schematic diagram of the structure and relative positions of the inner cylinder and inner shaft in this application.

[0022] Figure 6 yes Figure 5 A magnified view of part I in the middle.

[0023] In the diagram: 1. Support frame; 2. Trumpet-shaped inlet; 3. Inner guide rib; 4. Inlet support rib; 5. Annular bottom plate; 6. Crushing outer cylinder; 7. Conical section of outer cylinder; 8. Bottom hole of outer cylinder; 9. Inner shaft drive wheel; 10. Inner shaft; 11. Outer shaft drive wheel; 12. Cylinder bearing; 13. Outer shaft; 14. Crushing inner cylinder; 15. Outer spiral teeth of inner cylinder; 16. Screen hole of inner cylinder; 17. Crushing blade connecting rod; 18. Crushing blade; 19. Spiral feed plate; 20. Discharge inclined plate; 21. Bottom hole of inner cylinder; 22. Conical section of inner cylinder; 23. Secondary crushing teeth; 24. Cylindrical section; 25. Top conical section. Detailed Implementation

[0024] The technical solution described in this application will be further described below with reference to the accompanying drawings. It should be noted that the directional terms that may be used in the following paragraphs, including but not limited to "up," "down," "left," "right," "front," and "back," are all based on the visual directions shown in the corresponding drawings of the specification. They should not and should not be regarded as a limitation on the scope of protection of this technical solution, but are only intended to help those skilled in the art to better understand the technical solution described in the specification.

[0025] In the following description, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and similar expressions should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances and in conjunction with common knowledge in the field, design specifications, standard documents, etc.

[0026] See Figures 1 to 6 A particle crushing mechanism for color masterbatch before mixing includes a coaxially arranged inner crushing cylinder 14 and an outer crushing cylinder 6. The outer crushing cylinder 6 has a hollow cylindrical structure, and an integrally formed outer cylinder conical section 7 is provided at the bottom of the outer cylinder 6. The bottom end of the outer cylinder conical section 7 has a constricted structure and a bottom surface, and a plurality of outer cylinder bottom holes 8 are machined on the bottom surface of the outer cylinder conical section 7. A trumpet-shaped feed inlet 2 is fixedly connected to the top end of the inner crushing cylinder 14. The top end of the trumpet-shaped feed inlet 2 is open and its inner diameter is larger than the inner diameter at the connection position with the outer crushing cylinder 6.

[0027] The inner wall of the funnel-shaped feed inlet 2 is provided with a plurality of inner guide ribs 3 evenly distributed around its central axis, and the inner guide ribs 3 and the funnel-shaped feed inlet 2 are integrally formed. An inlet support rib 4 is provided at the connection position between the funnel-shaped feed inlet 2 and the outer crushing cylinder 6. The inlet support rib 4 is evenly distributed around the central axis of the outer crushing cylinder 6, and the bottom end of the inlet support rib 4 is fixed to the annular bottom plate 5. The annular bottom plate 5 is an annular plate body, and the inner wall of the annular bottom plate 5 is fixedly connected to the outer wall of the outer crushing cylinder 6.

[0028] The inner crushing cylinder 14 includes a hollow cylindrical section 24. A top conical section 25 is fixedly connected to the top opening of the cylindrical section 24. The cylindrical section 24 is a conical hollow shell, which can seal the top opening of the cylindrical section 24 and achieve a fixed connection with the inner shaft 10. An inner conical section 22 is fixedly connected to the bottom opening of the cylindrical section 24, and the bottom opening of the cylindrical section 24 is sealed through the inner conical section 22. The inner conical section 22 has the same shape and structure as the top conical section 25, except that the bottom end of the inner conical section 22 is machined with several inner cylinder bottom holes 21, which communicate with the sealed cavity formed by the inner conical section 22, the cylindrical section 24, and the top conical section 25.

[0029] A gap for crushing plastic particles is left between the outer wall of the inner crushing cylinder 14 and the inner wall of the outer crushing cylinder 6. Several inner cylinder outer spiral teeth 15 are provided at the gap positions corresponding to the crushing of plastic particles between the cylindrical section 24 and the outer crushing cylinder 6. The inner cylinder outer spiral teeth 15 are distributed around the central axis of the inner crushing cylinder 14. Several inner cylinder sieve holes 16 are machined on the cylindrical section 24 between adjacent inner cylinder outer spiral teeth 15. The inner cylinder sieve holes 16 are connected to the internal cavity of the cylindrical section 24.

[0030] A plurality of secondary crushing teeth 23 are provided at the gap positions corresponding to the inner conical section 22 and the outer conical section 7 for crushing plastic particles. The secondary crushing teeth 23 are spiral-shaped protrusions, and the distribution density of the secondary crushing teeth 23 on the inner conical section 22 is greater than the distribution density of the outer spiral teeth 15 on the cylindrical section 24. The distance between the end face of the secondary crushing teeth 23 facing the outer conical section 7 and the inner wall of the outer conical section 7 is less than the distance between the end face of the outer spiral teeth 15 facing the inner wall of the crushing outer cylinder 6 and the inner wall of the crushing outer cylinder 6, so as to achieve further crushing of plastic particles at this part.

[0031] A gap for discharging plastic granules is provided between the bottom surface of the inner conical section 22 and the bottom surface of the outer conical section 7. Several discharge ramps 20 are installed within this gap. The discharge ramps 20 are fixed to the inner shaft 10 and rotate with the rotation of the inner shaft 10. The bottom end of the inner shaft 10 is fixed to the bottom surface of the outer conical section 7 via a bearing seat, and the bearing seat has a sealed bearing structure. The discharge ramps 20 are inclined relative to the bottom surfaces of the outer conical section 7 and the inner conical section 22, with an acute angle between them. A cutting edge is machined at the contact point between the discharge ramps 20 and the bottom surface of the outer conical section 7. The high-speed rotation of the discharge ramps 20 with the inner shaft 10 accelerates the speed at which the plastic granules pass through the bottom hole 21 of the inner cylinder and the inner conical section 22, improving discharge efficiency.

[0032] Meanwhile, in order to assist the operation of the discharge inclined plate 20, a spiral feeding plate 19 is also provided in the inner conical section 22 of the crushing inner cylinder 14. The spiral feeding plate 19 is located on the inner shaft 10 and rotates at high speed with the inner shaft 10, which helps the material falling into the inner conical section 22 to be discharged through the bottom hole 21 of the inner cylinder.

[0033] The inner shaft 10, located above the inner shaft drive wheel 9 and inside the cylindrical section 24, has a plurality of radially distributed crushing blade connecting rods 17. Crushing blades 18 are fixedly connected to the ends of the crushing blade connecting rods 17 away from the inner shaft 10, and the crushing blade connecting rods 17 are evenly distributed along the length of the crushing blades 18. The crushing blades 18 have cutting edges that contact the inner wall of the crushing inner cylinder 14 (i.e., the inner wall of the cylindrical section 24). During the high-speed rotation of the crushing blades 18 with the inner shaft 10, they can crush plastic particles that enter the crushing inner cylinder 14 through the inner cylinder screen holes 16.

[0034] The top end of the inner shaft 10 passes through the top conical section 25 and enters the interior of the outer shaft 13. A cylinder bearing 12 is provided at the position where the inner cylinder's outer helical teeth 15 pass through the outer shaft 13, and the cylinder bearing 12 is located inside the outer shaft 13. An outer shaft drive wheel 11 is fixedly connected to the top end of the outer shaft 13. An inner shaft drive wheel 9 is fixedly connected to the top end of the inner shaft 10 that passes through the outer shaft 13. Both the inner shaft drive wheel 9 and the outer shaft drive wheel 11 are connected to an external power mechanism, such as a drive motor, via a transmission belt, to drive them to rotate in different directions. This opposite rotation increases the relative speed and improves the crushing effect.

[0035] The outer shaft 13 is connected to the support frame 1 via a bearing structure. The support frame 1 consists of multiple shafts, which are shown only schematically in the attached drawings.

[0036] Based on the above embodiments, the following paragraphs will continue to describe in detail the technical features involved and the functions and roles of these technical features in this technical solution, so as to help those skilled in the art to fully understand the technical solution and reproduce it.

[0037] After entering the funnel-shaped feed inlet 2, the plastic granules, under the action of several inner guide ribs 3, roll downwards along the inner wall of the funnel-shaped feed inlet 2 into the gap between the outer crushing cylinder 6 and the inner crushing cylinder 14 for crushing the plastic granules. The plastic granules entering the gap are gradually crushed into the inner cavity of the inner crushing cylinder 14 by the action of the outer spiral teeth 15 of the inner cylinder section 24 through the inner cylinder screen holes 16. The high-speed crushing of the plastic granules is achieved by the rotation of the inner crushing cylinder 14 in the opposite direction to the crushing blades 18. Plastic granules that do not pass through the inner cylinder screen holes 16 and enter the inner crushing cylinder 14 will move downwards under the action of the outer spiral teeth 15 into the gap of the conical section where the inner secondary crushing teeth 23 are located. Because the gap between the secondary crushing teeth 23 and the gap between the inner cylinder outer spiral teeth 15 is smaller, the plastic crushing distance is smaller. Under relative motion, the plastic particles can be crushed in a secondary manner by the secondary crushing teeth 23. Since there are no screen holes for plastic particles to enter at the inner cylinder conical section 22 and the outer cylinder conical section 7, the crushed plastic particles will enter the discharge inclined plate 20 under the action of the secondary crushing teeth 23, and be discharged from the bottom hole 8 of the outer cylinder through the discharge inclined plate 20.

[0038] Plastic particles crushed by the crushing blade 18 in the inner crushing cylinder 14 enter the conical section 22 of the inner cylinder, and the crushed plastic particles are fed into the bottom hole 21 of the inner cylinder by the spiral feeding plate 19 in the conical section 22. The bottom hole 21 of the inner cylinder feeds the plastic particles to the discharge inclined plate 20, and the discharge inclined plate 20 discharges the plastic particles through the bottom hole 8 of the outer cylinder.

[0039] Finally, although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A particle crushing mechanism before masterbatch mixing, comprising a support frame, an outer shaft connected to the support frame via a bearing structure, and an outer shaft drive wheel fixedly connected to the top of the outer shaft, characterized in that: The bottom end of the outer shaft is connected to the inner crushing cylinder, which is located inside the outer crushing cylinder and coaxially arranged with it. The top end of the outer crushing cylinder is a trumpet-shaped inlet, and the bottom end of the outer crushing cylinder has a bottom hole that connects to the inside of the outer crushing cylinder. A gap for crushing plastic particles is left between the outer wall of the inner crushing cylinder and the inner wall of the outer crushing cylinder. Several inner cylinder outer spiral teeth are distributed on the outer wall of the inner crushing cylinder corresponding to the gap for crushing plastic particles, and several inner cylinder screen holes are distributed on the side wall of the inner crushing cylinder corresponding to the inner cylinder outer spiral teeth. The inner cylinder screen holes are connected to the internal cavity of the inner crushing cylinder. The bottom of the inner crushing cylinder is also provided with an inner cylinder bottom hole, which communicates with the internal cavity of the inner crushing cylinder; a bottom end gap is left between the bottom end of the inner crushing cylinder and the bottom end of the outer crushing cylinder, and several discharge inclined plates are provided in the bottom end gap, which are fixedly connected to the inner shaft body; several radially distributed crushing blade connecting rods are provided at the position of the inner shaft body in the internal area of ​​the inner crushing cylinder, and the crushing blade connecting rods are fixedly connected to the crushing blades, with the cutting edge of the crushing blades contacting the inner wall of the inner crushing cylinder; the inner shaft body extends out after passing through the outer shaft body at the top of the inner crushing cylinder and is connected to the inner shaft body drive wheel. A cylindrical bearing is provided at the connection point between the inner and outer shafts; the inner crushing cylinder has an inner conical section, and an inner cylinder bottom hole is distributed at the bottom end of the inner conical section; the bottom end of the outer crushing cylinder has an outer conical section, and the outer cylinder bottom hole is located at the bottom end of the outer conical section; a gap for crushing plastic particles is left between the outer wall of the inner conical section and the inner wall of the outer conical section, and several secondary crushing teeth are distributed on the outer wall of the inner conical section; the secondary crushing teeth are spiral protrusions, and the density of the secondary crushing teeth is greater than the density of the spiral teeth on the outer conical section of the inner cylinder, and the outer end face of the secondary crushing teeth is flush with the outer conical section of the outer cylinder. The gap between the inner walls of the segments is smaller than the gap between the outer end face of the outer spiral teeth of the inner cylinder and the inner wall of the crushing outer cylinder; the crushing inner cylinder includes a cylindrical segment with a hollow cylindrical structure, the outer wall of the cylindrical segment is distributed with a number of inner cylinder outer spiral teeth, and the cylindrical segment between adjacent inner cylinder outer spiral teeth is distributed with a number of inner cylinder sieve holes; the top opening of the cylindrical segment is sealed by a top conical segment, and the bottom opening of the cylindrical segment is sealed by an inner cylinder conical segment, the inner cylinder conical segment has a bottom surface, and the bottom surface of the inner cylinder conical segment is provided with an inner cylinder bottom hole; the top of the top conical segment is fixedly connected to the outer shaft.

2. The particle crushing mechanism before masterbatch mixing according to claim 1, characterized in that: The inner wall of the funnel-shaped feed inlet is provided with several inner guide ribs, which are fixed together with the funnel-shaped feed inlet and extend to the connection position between the funnel-shaped feed inlet and the outer crushing cylinder; several inlet support ribs are distributed at the connection position between the outer wall of the inner guide ribs and the outer crushing cylinder, and the bottom end of the inlet support ribs is fixedly connected to the annular bottom plate, which is located on the outer wall of the outer crushing cylinder.

3. The particle crushing mechanism before masterbatch mixing according to claim 2, characterized in that: The crushing inner cylinder is equipped with a spiral feeding plate inside the conical section of the inner cylinder. The spiral feeding plate is fixed to the inner shaft at the position of the conical section of the inner cylinder and rotates with the rotation of the inner shaft.

4. The particle crushing mechanism before masterbatch mixing according to claim 3, characterized in that: The connection point between the top conical section and the cylindrical section is flush with the connection point between the funnel-shaped feed inlet and the crushing outer cylinder.

Images