A premixing device for producing antibacterial masterbatch

Abstract

The utility model relates to the technical field of antibacterial masterbatch production, and particularly relates to a premix equipment for producing antibacterial masterbatch, three groups of axial grinding grooves are arranged on the inner wall of the mixing barrel, grinding wheels are embedded in the grooves, the grinding wheels are installed in the rotating groove outside the grinding block through shaft bodies, the grinding block is connected with a rotating cylinder, the rotating cylinder extends into the supporting cylinder to fix a rotating bevel gear, the rotating bevel gear is engaged with a driving bevel gear, the driving bevel gear is connected with a driving motor, when the grinding block revolves, the grinding wheels are constrained by the grinding grooves to rotate and roll, a dynamic grinding area is formed to break solid particles, a stirring shaft penetrates through the rotating cylinder and the grinding block, a stirring rod at the bottom is connected with a scraper, the rubber plate outside the scraper is in interference fit with the barrel wall to rotate and eliminate the wall-stuck material, the barrel wall heating plate and the weighing sensor are cooperated with the temperature controller to measure; the utility model is cooperated with mechanical crushing and mixing and scraping wall, solves the solid-liquid dispersion problem of the high-viscosity system, avoids thermal degradation, and realizes the homogenization pretreatment of the matrix.

Description

Technical Field

[0001] This utility model relates to the field of antibacterial masterbatch production technology, and in particular to a premixing equipment for producing antibacterial masterbatch. Background Technology

[0002] ① In the early stages of preparing antibacterial masterbatch premixes, a combination of manual feeding and hand-held mixing tools was commonly used. Operators poured solid materials into open containers and continuously stirred them manually, while simultaneously using an external heat source to heat the container walls to promote component fusion. This method has significant drawbacks: material crushing relies on manual hammering and rolling, making precise control of particle size distribution impossible; the stirring process only achieves surface material displacement, easily leading to the formation of undispersed agglomerates on the container walls and bottom; heat transfer efficiency is limited by the irregularity of manual stirring, resulting in both localized overheating and carbonization and cold zones; the core problem is that the intensity of manual intervention is negatively correlated with mixing uniformity, making it difficult to meet the batch consistency requirements of large-scale production.

[0003] ② To overcome the bottleneck of manual operation, a technical solution using a powered stirring system has emerged in the industry. This solution involves a motor-driven stirring shaft vertically installed at the center of a sealed container, with a multi-layered serrated dispersion disc fixed to the end of the shaft. When the motor runs, the dispersion disc rotates at high speed, generating shear vortices that forcibly disperse the added powder materials. Simultaneously configured side wall heating plates raise the overall temperature through convection heat transfer. Although this design eliminates the problem of low manual efficiency, its solid-liquid dispersion mechanism has inherent shortcomings: the centrifugal force field formed by the serrated dispersion disc causes the material to be continuously thrown towards the container wall, and the high-viscosity liquid medium forms a viscous layer in the near-wall region, causing some high-density solid particles to be captured by fluid resistance and remain trapped in the dead zone at the bottom of the container; at the same time, the axial suction force generated by the rotating disc is weak and cannot re-roll the particles thrown into the viscous layer back into the efficient shearing zone. This essentially shifts the bottleneck of mixing efficiency from manual capability to fluid dynamics limitations.

[0004] ③ The above-mentioned mechanical stirring scheme reveals structural defects when dealing with high solid content and multiphase component systems: the capture effect of the serrated dispersion disk on solid particles in viscous media increases exponentially with the increase of viscosity, causing a large number of functional particles to be entrained and deposited without effective crushing, resulting in a significant decrease in the actual utilization rate of active components; while excessively extending the stirring time in an attempt to improve the dispersion leads to polymer matrix degradation due to the heat accumulation effect; this reveals that the existing technology cannot simultaneously meet the triple requirements of particle size control, viscous system homogeneity and thermal process stability; to break through this bottleneck, a forced mechanical crushing path needs to be established before the material enters the high-temperature mixing, decomposing the solid phase crushing and liquid phase mixing into two controllable stages that are spatially separated but temporally continuous - this is the core breakthrough for subsequent technological innovation. Utility Model Content

[0005] The purpose of this invention is to provide a premixing equipment for producing antibacterial masterbatch, which solves the technical problems in existing mechanical stirring schemes, such as reduced utilization of active components due to the trapping effect of viscous media on solid particles, difficulty in achieving both particle size and uniformity, and polymer degradation caused by heat accumulation.

[0006] To achieve the above objectives, this utility model provides a premixing device for producing antibacterial masterbatch, including a mixing tank. Three sets of grinding grooves are formed on the inner wall of the mixing tank. Several grinding wheels are respectively fitted into the grinding grooves. The centers of the grinding wheels are respectively mounted in rotating grooves via shafts. The rotating grooves are respectively located radially outward from the grinding block. A rotating cylinder is fixedly installed at the top of the grinding block. A rotating bevel gear is fixedly installed at the top of the rotating cylinder, extending into the interior of a support cylinder. A driving bevel gear is meshed with one side of the rotating bevel gear. The driving bevel gear is connected to a drive motor via a shaft passing through one side of the support cylinder. The drive motor is mounted on the outside of the support cylinder via bolts.

[0007] The support cylinder is bolted to the top of the bucket lid, the bucket lid is bolted to the top of the mixing bucket, a rotating motor is bolted to the top of the support cylinder, and the output end of the rotating motor is equipped with a stirring shaft.

[0008] The stirring shaft extends from its bottom end and passes through the rotating cylinder and grinding block, and a stirring rod is fixedly installed thereon. A scraper is fixedly installed at the end of the stirring rod, and a rubber plate is provided on the outside of the scraper. The rubber plate is attached to the inner wall of the mixing barrel.

[0009] The top of the bucket lid is fixedly installed with a liquid inlet connector adjacent to the support cylinder, and a discharge hopper is installed on the other side of the top of the bucket lid adjacent to the support cylinder by bolts. A suction cylinder is installed on the top of the discharge hopper by bolts.

[0010] The suction cylinder is fixedly installed with a feed connector on its radial outer side. A cylinder cover is installed on the top of the suction cylinder by bolts. A three-way cylinder is installed on the top of the cylinder cover by bolts. One side of the three-way cylinder is a suction connector. A motor is installed on the top of the three-way cylinder by bolts.

[0011] The motor has a rotating shaft at its output end. The bottom end of the rotating shaft extends through the bucket lid and is fixedly installed with a rotating filter element. The outer radial side of the rotating filter element is installed at the bottom end of the bucket lid through a sealed bearing.

[0012] The mixing barrel has a heating plate inside its inner wall, and a conveying pipe is fixedly installed on the lower radial side of the mixing barrel, extending into the interior of the mixing barrel. A discharge pipe is fixedly installed at the bottom end of the conveying pipe.

[0013] The conveying pipe is bolted to one end away from the mixing tank and a conveying motor is installed thereon. The output end of the conveying motor is provided with a conveying rod, which is rotatably installed inside the conveying pipe and has helical blades on the outside.

[0014] The mixing tank is fixedly installed with a pad at the bottom, and a weighing sensor is welded to each of the four corners of the bottom of the pad. The bottom of the weighing sensor is welded to the top of the fixing plate, and a fixing hole is opened at each of the four corners of the fixing plate.

[0015] This invention relates to a premixing device for producing antibacterial masterbatch. The device comprises three sets of axially extending grinding grooves on the inner wall of a mixing drum, with multiple grinding wheels arranged within each groove to form a core crushing unit. The grinding wheels are constrained by shafts within rotating grooves radially outward from the grinding blocks, creating a self-rotating, suspended support structure. A drive motor, via a drive bevel gear mounted on the side wall of a support cylinder, engages with rotating bevel gears, driving the rotating cylinder, rigidly connected to the top of the grinding blocks, to rotate. This forces the grinding blocks to revolve within the mixing drum. During this process, the grinding wheels, constrained by the geometric boundaries of the grinding grooves, spin and roll, creating a continuous dynamic grinding gap through a combined revolution and rotation trajectory.

[0016] When the material enters the mixing tank, it is forcibly drawn into the grinding tank area by the rotating grinding blocks, where it is subjected to continuous alternating extrusion pressure between the rolling surface of the grinding wheel and the fixed tank wall. Hard agglomerated particles are progressively broken down and deagglomerated in this three-dimensional force field, and the particle size distribution range is significantly narrowed. The active antibacterial components are fully released from the carrier substrate due to mechanical tearing. This structural characteristic also creates multiple technical advantages: the centrifugal force of revolution allows the material to continuously circulate into the grinding zone, eliminating the dead zones of traditional mixing; the linear contact mode of the groove wheel meshing gap is more conducive to controlling the lower limit of particle size than the impact crushing of the dispersion disc; the closed layout of the drive bevel gear transmission chain in the support cylinder ensures that the power transmission is completely isolated from the material crushing process, eliminating the risk of lubricating oil contamination; and finally, the intrinsic dispersion of the antibacterial functional phase in the masterbatch matrix is ​​achieved, laying a uniform premixing foundation for subsequent extrusion granulation. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0019] Figure 2 This is a schematic diagram of the structure of the mixing tank in an embodiment of this utility model.

[0020] Figure 3 This is a schematic diagram of the overall planar structure of an embodiment of this utility model.

[0021] Figure 4 This is a schematic diagram of the planar structure of the suction cylinder according to an embodiment of the present invention.

[0022] In the diagram: 101. Mixing tank; 102. Grinding tank; 103. Grinding wheel; 104. Rotating trough; 105. Grinding block; 106. Rotating cylinder; 107. Support cylinder; 108. Rotating bevel gear; 109. Drive bevel gear; 110. Drive motor; 111. Tank lid; 112. Rotating motor; 113. Stirring shaft; 114. Stirring rod; 115. Scraper; 116. Rubber plate; 117. Liquid inlet connector; 118. Discharge hopper ; 119. Suction cylinder; 120. Feed connector; 121. Cylinder cover; 122. Three-way cylinder; 123. Suction connector; 124. Motor; 125. Rotating shaft; 126. Rotating filter element; 127. Heating plate; 128. Conveying pipe; 129. Discharge pipe; 130. Conveying motor; 131. Conveying rod; 132. Spiral blade; 133. Pad; 134. Weighing sensor; 135. Fixing plate; 136. Fixing hole. Detailed Implementation

[0023] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0024] Please see Figures 1-4 .

[0025] This utility model provides a premixing device for producing antibacterial masterbatch. The main structure includes a mixing tank 101. Three axially extending annular grinding grooves 102 are evenly distributed along the inner wall of the mixing tank 101. A grinding wheel 103 is movably fitted into each grinding groove 102. The grinding wheel 103 is rotatably mounted in a rotating groove 104 radially outer of a grinding block 105 via a shaft. The grinding block 105 has a single-piece matrix structure. The top of the grinding block 105 is rigidly connected to a rotating cylinder 106 penetrating a support cylinder 107 via bolts. The top of the rotating cylinder 106 extends into the support cylinder 107 and is covered with rotating bevel teeth 108. These rotating bevel teeth 108 form an orthogonal meshing pair with driving bevel teeth 109 installed on the side wall of the support cylinder 107, driving... The bevel gear 109 is connected to the drive motor 110 via a coupling. The drive motor 110 is bolted to the outside of the support cylinder 107. The bottom flange of the support cylinder 107 is vertically installed at the center of the barrel cover 111 via bolts. The edge of the barrel cover 111 is bolted to the top flange of the mixing barrel 101. A rotary motor 112 is installed on the top flange of the support cylinder 107. The lower end of the output shaft of the rotary motor 112 is connected to the stirring shaft 113, which passes through the central through hole of the rotating cylinder 106 and the axial channel of the grinding block 105. A stirring rod 114 is welded to the bottom end of the stirring shaft 113. A scraper 115 is fixed to the end of the stirring rod 114. The outer curved surface of the scraper 115 is fitted with a rubber plate 116. In its free state, the outer diameter of the rubber plate 116 is larger than the inner diameter of the mixing barrel 101. An interference fit ensures that the working surface of the rubber plate 116 slides tightly against the inner wall of the mixing tank 101. An inlet connector 117 is installed on the top surface of the tank cover 111 near the support cylinder 107. A discharge hopper 118 is installed symmetrically on the side via flanges. The upper end of the discharge hopper 118 is connected to the cylinder body of the suction cylinder 119. The radial interface of the suction cylinder 119 is connected to the inlet connector 120. A cylinder cover 121 is installed at the top of the suction cylinder 119. The center of the cylinder cover 121 is connected to the suction connector 123 and the mounting cavity of the motor 124 via a three-way cylinder 122. A rotating shaft 125 connected to the lower end of the output shaft of the motor 124 passes through the sealing device of the tank cover 111. A cylindrical rotating filter element 126 is installed at the bottom end of the rotating shaft 125. The outer cover of the rotating filter element 126 achieves dynamic sealing with the bottom surface of the tank cover 111 through a sealed bearing. The mixing tank 101 has a heating plate 127 embedded in its jacket layer. A conveying pipe 128 is obliquely welded to the lower side wall of the tank body, and the conveying pipe 128 extends to the bottom of the inner cavity of the mixing tank 101. The outlet end of the conveying pipe 128 is connected to a discharge pipe 129, and a conveying motor 130 is installed at the inlet end. A conveying rod 131 connected to the output end of the conveying motor 130 extends into the inside of the conveying pipe 128. Spiral blades 132 are spirally welded to the surface of the conveying rod 131 to form a conveying mechanism. A pad block 133 is welded to the bottom of the mixing tank 101. Weighing sensors 134 are symmetrically welded to the four corners of the bottom surface of the pad block 133. The bottom surface of each weighing sensor 134 is fixed to the top surface of the fixing plate 135. Fixing holes 136 are drilled at the four corners of the fixing plate 135. The entire weighing system is interlocked with the conveying motor 130.When the drive motor 110 drives the grinding block 105 to revolve via the bevel gear pair, the grinding wheel 103 rotates along the three grinding grooves 102 to grind the material; when the rotating motor 112 drives the stirring rod 114 to rotate via the stirring shaft 113, the interference-fit rubber plate 116 continuously scrapes the barrel wall; the rotating filter element 126 self-cleans using centrifugal force during high-speed rotation; the heating plate 127 precisely controls the temperature to promote melting and plasticization; the spiral blade 132 achieves quantitative output under the interlocking control of the weighing system; the nested structure of the drive bevel gear 109 and the stirring shaft 113 saves longitudinal space; the closed-loop control of the weighing sensor 134 and the conveying mechanism ensures the accuracy of the proportioning, so that the antibacterial components are uniformly dispersed in the polymer matrix.

[0026] Working principle: When the equipment starts up, a negative pressure environment is first formed by connecting to an external vacuum system through the suction connector 123 at the top of the suction cylinder 119, which causes the particulate raw material to be continuously sucked in from the radial feed connector 120 of the suction cylinder 119. When the airflow carrying the raw material passes through the rotating filter element 126 under the lid 111, the particles are intercepted by the high-precision filter screen and fall into the inner cavity of the mixing tank 101 due to gravity. The synchronously working motor 124 drives the rotating filter element 126 to rotate at high speed, and uses centrifugal force to completely throw the fine powder particles attached to the surface of the filter element away from the filter screen. The dynamic self-cleaning mechanism ensures that the filtration channel is always unobstructed, ensuring the continuity of material delivery from the source. At the same time, the liquid additives are introduced through the independent liquid inlet connector 117 on the lid 111. The material is precisely injected into the mixing drum 101. At this time, the drive motor 110 drives the drive bevel gear 109 to rotate through the output shaft. This bevel gear and the rotating bevel gear 108 form an orthogonal gear pair meshing transmission, driving the rotating drum 106 to rotate circumferentially. Since the bottom end of the rotating drum 106 is rigidly connected to the grinding block 105, the individual grinding block 105 revolves within the inner cavity of the mixing drum 101. During this process, the grinding wheel 103 on the radially outer side of the grinding block 105 is mechanically constrained by the rotating groove 104 and rotates on its own axis. This causes the multiple grinding wheels 103 to rotate in a planetary manner along the three sets of annular grinding grooves 102 axially opened on the inner wall of the mixing drum 101. The raw material particles located in the grinding area are efficiently crushed under the combined action of extrusion and grinding by the grinding wheel 103 and the groove wall, significantly improving the efficiency of grinding. The system improves the uniformity of powder particle size and the dispersion of active ingredients. Simultaneously, the stirring system, working in conjunction with the grinding mechanism, drives the stirring shaft 113 to rotate via a top-mounted rotating motor 112. The stirring shaft 113, which passes through the hollow structure of the rotating cylinder 106 and the grinding block 105, drives the bottom stirring rod 114 in three-dimensional motion. When the rigidly connected scraper 115 rotates synchronously with the stirring rod 114, its outer elastic rubber plate 116 closely adheres to the inner wall of the mixing tank 101, continuously scraping and forcibly removing the viscous material adhering to the tank wall to prevent thermal degradation, while also promoting the full mixing of newly added solid and liquid components through shearing action. The heating plate 127 embedded in the wall of the mixing tank 101 is activated simultaneously, precisely controlling the temperature to keep the material system within the optimal plasticizing temperature range, accelerating the polymerization of antibacterial agent molecules. Diffusion and penetration in the compound matrix; when the mixing process reaches the process set threshold, the conveying motor 130 drives the conveying rod 131 to drive the spiral blade 132 to rotate, and pushes the molten material at the bottom of the mixing barrel 101 through the radial conveying pipe 128, and finally achieves quantitative and controllable discharge through the discharge pipe 129; throughout the process, the weighing sensors 134 arranged at the four corners collect the weight change signal of the mixing barrel 101 in real time, and accurately control the feeding ratio and conveying flow rate of each component through gravity feedback; the nested structure design of the drive bevel gear 109 transmission chain and the stirring shaft 113 forms multiple motion couplings, and the circumferential spinning of the individual grinding block 105 and the radial stirring of the stirring rod 114 form a high-order mixing field in the heating temperature field, so that the antibacterial functional particles can be dispersed at the nanoscale;The rigid connection between the lid 111 and the support cylinder 107 provides triple vibration-resistant support for the drive motor 110, the rotating motor 112, and the rotating filter element 126 system, ensuring the long-term stable operation of the composite motion mechanism in a closed environment. Finally, through the coordinated process of crushing, mixing, temperature control, wall scraping, and quantitative output, the homogenization pretreatment of the antibacterial masterbatch matrix is ​​completed.

[0027] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that implementing all or part of the above embodiments and making equivalent changes in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A premixing device for producing antibacterial masterbatch, comprising a mixing tank (101), characterized in that: The mixing tank (101) has three sets of grinding grooves (102) on its inner wall. Several grinding wheels (103) are attached to the grinding grooves (102). The grinding wheels (103) are respectively installed in the rotating grooves (104) through shafts at their centers. The rotating grooves (104) are respectively opened on the radial outer side of the grinding block (105). A rotating cylinder (106) is fixedly installed on the top of the grinding block (105). A rotating bevel tooth (108) is fixedly installed inside the support cylinder (107) at the top of the rotating cylinder (106). A driving bevel tooth (109) is meshed on one side of the rotating bevel tooth (108). The driving bevel tooth (109) is connected to the drive motor (110) through the support cylinder (107) through a shaft. The drive motor (110) is installed on the outside of the support cylinder (107) by bolts.

2. The premixing equipment for producing antibacterial masterbatch as described in claim 1, characterized in that: The support cylinder (107) is bolted to the top of the barrel cover (111), the barrel cover (111) is bolted to the top of the mixing barrel (101), and a rotating motor (112) is bolted to the top of the support cylinder (107). The output end of the rotating motor (112) is provided with a stirring shaft (113).

3. The premixing equipment for producing antibacterial masterbatch as described in claim 2, characterized in that: The bottom end of the stirring shaft (113) extends through the rotating cylinder (106) and the grinding block (105) and then a stirring rod (114) is fixedly installed. A scraper (115) is fixedly installed at the end of the stirring rod (114). A rubber plate (116) is provided on the outside of the scraper (115) and the rubber plate (116) is attached to the inner wall of the mixing tank (101).

4. The premixing equipment for producing antibacterial masterbatch as described in claim 3, characterized in that: A liquid inlet connector (117) is fixedly installed at the top of the bucket cover (111) adjacent to the support cylinder (107). A discharge hopper (118) is installed on the other side of the top of the bucket cover (111) adjacent to the support cylinder (107) by bolts. A suction cylinder (119) is installed on the top of the discharge hopper (118) by bolts.

5. The premixing equipment for producing antibacterial masterbatch as described in claim 4, characterized in that: A feed connector (120) is fixedly installed on the radial outer side of the suction cylinder (119). A cylinder cover (121) is installed on the top of the suction cylinder (119) by bolts. A three-way cylinder (122) is installed on the top of the cylinder cover (121) by bolts. A suction connector (123) is located on one side of the three-way cylinder (122). A motor (124) is installed on the top of the three-way cylinder (122) by bolts.

6. The premixing equipment for producing antibacterial masterbatch as described in claim 5, characterized in that: The output end of the motor (124) is provided with a rotating shaft (125). The bottom end of the rotating shaft (125) extends through the bucket cover (111) and is fixedly installed with a rotating filter element (126). The radial outer side of the rotating filter element (126) is installed at the bottom end of the bucket cover (111) through a sealed bearing.

7. The premixing equipment for producing antibacterial masterbatch as described in claim 6, characterized in that: The mixing barrel (101) is provided with a heating plate (127) inside its inner wall. A conveying pipe (128) is fixedly installed on the lower radial side of the mixing barrel (101) and extends into the mixing barrel (101). A discharge pipe (129) is fixedly installed at the bottom end of the conveying pipe (128).

8. The premixing equipment for producing antibacterial masterbatch as described in claim 7, characterized in that: A conveying motor (130) is bolted to one end of the conveying pipe (128) away from the mixing tank (101). The output end of the conveying motor (130) is provided with a conveying rod (131). The conveying rod (131) is rotatably installed inside the conveying pipe (128). A spiral blade (132) is provided on the outside of the conveying rod (131).

9. The premixing equipment for producing antibacterial masterbatch as described in claim 8, characterized in that: A pad (133) is fixedly installed at the bottom of the mixing tank (101). Weighing sensors (134) are welded to the four corners of the bottom of the pad (133). The bottom of the weighing sensors (134) is welded to the top of the fixing plate (135). Fixing holes (136) are opened at the four corners of the fixing plate (135).

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