A blending compounding system for the production of starch-based biodegradable plastics

Abstract

The application discloses a kind of starch-based biodegradable plastic preparation's blending composite system, it is related to starch-based plastic preparation technical field, including support;Bottom plate is fixed in the upper end surface of the support, and its bottom is fixed with driving motor;Blending bucket is fixed in the upper end surface of the bottom plate, and its top detachably installs cover plate;Pivot is rotatably arranged in bottom plate and cover plate, and is driven by the driving motor;Discharge assembly one and discharge assembly two are fixed on the pivot symmetrically;Water injection assembly is configured as two, fixed on the pivot symmetrically;And first blending component is fixed on the pivot, and located below discharge assembly one and discharge assembly two.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of starch-based plastic preparation, in particular to a blending and compounding system for preparing starch-based biodegradable plastics. BACKGROUND

[0002] Starch-based biodegradable plastics are generally blends of modified starch and biodegradable polyester, which can be completely biodegraded, composted, and environmentally friendly. Waste can be treated by composting, landfilling, etc. It is widely used in plastic packaging materials, shock-absorbing materials, plastic films and plastic bags, disposable tableware, food containers, toys, etc.

[0003] In the preparation of starch-based biodegradable plastics, starch needs to be blended and modified to form thermoplastic starch, which is convenient for preparation. The existing starch blending and compounding generally mixes starch and plasticizers by stirring, but due to the existence of intermolecular and intramolecular hydrogen bond forces in starch, the blending effect is poor, which affects the processing and molding.

[0004] In view of the above problems, the present application provides a blending and compounding system for preparing starch-based biodegradable plastics to solve the above problems. SUMMARY

[0005] To achieve the above purpose, the present application provides the following technical scheme: a blending and compounding system for preparing starch-based biodegradable plastics, comprising:

[0006] a support;

[0007] a bottom plate fixed to the upper end surface of the support, and the bottom of which is fixed with a driving motor;

[0008] a blending barrel fixed to the upper end surface of the bottom plate, and a cover plate detachably mounted on the top of the blending barrel;

[0009] a rotating shaft rotatably arranged in the bottom plate and the cover plate, and driven by the driving motor;

[0010] a first discharging assembly and a second discharging assembly symmetrically fixed on the rotating shaft;

[0011] a water injection assembly configured as two and symmetrically fixed on the rotating shaft; and

[0012] a first blending assembly fixed on the rotating shaft and located below the first and second discharging assemblies.

[0013] Further, preferably, the upper end surface of the bottom plate is fixed with a guide disc, the lowest part of the guide disc is provided with a discharge port, the discharge port penetrates the bottom plate, and the guide disc, the blending barrel and the first blending assembly together form a second blending space, and the rotating shaft is fixed with a plurality of mixing leaves at the position of the second blending space.

[0014] Further, preferably, the crown gear is fixed to the inner wall of the blending barrel near the feeding assembly one, and the feeding assembly one and the feeding assembly two are the same in structure, and each includes:

[0015] a stirring bin fixed to the rotating shaft;

[0016] a stirring shaft rotatably arranged in the stirring bin and radially arranged along the rotating shaft;

[0017] a driving gear fixed to one end of the stirring shaft away from the rotating shaft and engaged with the crown gear; and

[0018] a plurality of stirring blades equidistantly fixed to the rotating shaft.

[0019] Further, preferably, the inner wall of the stirring bin is provided with a guide wall inclined to the stirring blades, and the bottom of the stirring bin is provided with a feeding port, the opening of the feeding port is inclinedly arranged towards the inner wall of the blending barrel, and the feeding port of the feeding assembly one is larger than that of the feeding assembly two.

[0020] Further, preferably, the water injection assembly includes:

[0021] a water storage bin fixed to the rotating shaft;

[0022] a water pressing block slidably arranged in the water storage bin, and a plurality of one-way air holes are through-provided on the water pressing block;

[0023] a lifting handle threadedly connected to the upper end surface of the water pressing block, the upper end surface of the lifting handle is not higher than the upper end surface of the water storage bin, and the threaded hole connected with the water pressing block penetrates through the water pressing block; and

[0024] a hose one end of which is connected to the lower end surface of the water storage bin and the other end of which is connected to the upper end surface of the first blending assembly.

[0025] Further, preferably, the water pressing block will slowly descend in the water storage bin by its own weight without external force.

[0026] Further, preferably, the first blending assembly includes:

[0027] a fixing column, the outer wall of which is symmetrically provided with two groups of sliding grooves and two groups of hinged interfaces;

[0028] two blending rods slidably arranged in the sliding grooves and provided with compression springs between the sliding grooves; and

[0029] two water outlet rods hingedly arranged in the hinged interfaces and provided with torsion springs sleeved at the hinged positions.

[0030] Further, preferably, the inside of the water outlet rod is hollow, a water inlet is arranged at the top of the water outlet rod, and a plurality of mist nozzles are fixed equidistantly on one side of the end of the water outlet rod away from the fixed column, and a scraping plate is fixed on the other side.

[0031] Compared with the prior art, the starch-based biodegradable plastic preparation blending composite system has the following beneficial effects:

[0032] In the present application, starch and plasticizer are respectively put into the first discharging assembly and the second discharging assembly, water is sprayed on the inner wall of the blending barrel through the first blending assembly, the adhesion of the inner wall of the blending barrel is increased, the starch and the plasticizer are adhered to the inner wall of the blending barrel, and the starch and the plasticizer are extruded through the first blending assembly, so that the intermolecular and intramolecular hydrogen bond forces existing in the starch are destroyed, the plasticizer is transferred to the starch molecules, the blending degree is improved, and then the rotating speed of the first blending assembly is increased, so that the blending material adhered to the inner wall of the blending barrel is scraped off, the blending material is subjected to secondary stirring and blending in the second blending space, and the thermoplasticity of the starch is greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0033] Fig. 1 It is a whole schematic view of the starch-based biodegradable plastic preparation blending composite system;

[0034] Fig. 2 It is a picking assembly schematic view of the starch-based biodegradable plastic preparation blending composite system;

[0035] Fig. 3 It is a third picking assembly schematic view of the starch-based biodegradable plastic preparation blending composite system;

[0036] In the drawing: 1, support; 2, bottom plate; 3, blending barrel; 4, rotating shaft; 5, first discharging assembly; 6, second discharging assembly; 7, water injection assembly; 8, first blending assembly; 21, guide disc; 22, discharging port; 31, crown gear; 51, stirring bin; 52, stirring shaft; 53, stirring blade; 54, discharging port; 71, water storage bin; 72, water pressing block; 73, pull handle; 74, one-way air port; 75, hose; 81, fixed column; 82, blending rod; 83, water outlet rod; 811, sliding groove; 812, hinged joint; 831, scraping plate; 832, mist nozzle. DETAILED DESCRIPTION

[0037] Reference Figs. 1-3 The present application provides a technical solution: a starch-based biodegradable plastic preparation blending composite system, comprising:

[0038] support 1;

[0039] A bottom plate 2 is fixed on the upper end surface of the support 1, and a driving motor is fixed on the bottom of the bottom plate 2;

[0040] A blending barrel 3 is fixed on the upper end surface of the bottom plate 2, and a cover plate is detachably mounted on the top of the blending barrel 3;

[0041] A rotating shaft 4 is rotatably arranged in the bottom plate 2 and the cover plate, and is driven by the driving motor;

[0042] A first discharging assembly 5 and a second discharging assembly 6 are symmetrically fixed on the rotating shaft 4;

[0043] Two water injection assemblies 7 are symmetrically fixed on the rotating shaft 4; and

[0044] A first blending assembly 8 is fixed on the rotating shaft 4 and located below the first discharging assembly 5 and the second discharging assembly 6.

[0045] It should be noted that the outer walls of the first discharging assembly 5, the second discharging assembly 6 and the water injection assembly 7 together form a circle with the same diameter as the inner wall of the blending barrel 3, so as to support the rotating shaft 4 when the cover plate is removed.

[0046] In the embodiment, a guide disc 21 is fixed on the upper end surface of the bottom plate 2, a lowest part of the guide disc 21 is provided with a discharging port 22, the discharging port 22 penetrates the bottom plate 2, and the guide disc 21, the blending barrel 3 and the first blending assembly 8 together form a second blending space, and a plurality of mixing leaves are fixed on the rotating shaft 4 located in the second blending space.

[0047] That is, the starch processed by the first blending assembly 8 can be secondarily blended by the plurality of mixing leaves after falling into the second blending space, so as to improve the mixing degree of the starch and the plasticizer.

[0048] In the embodiment, a crown gear 31 is fixed on the inner wall of the blending barrel 3 close to the first discharging assembly 5, and the first discharging assembly 5 and the second discharging assembly 6 are the same in structure and each include:

[0049] A stirring bin 51 is fixed on the rotating shaft 4;

[0050] A stirring shaft 52 is rotatably arranged in the stirring bin 51 and radially arranged along the rotating shaft 4;

[0051] A driving gear is fixed on one end of the stirring shaft 52 away from the rotating shaft 4 and engaged with the crown gear 31; and

[0052] A plurality of stirring leaves 53 are equidistantly fixed on the rotating shaft 4.

[0053] That is to say, when the starch and plasticizer are put into the first discharging assembly 5 and the second discharging assembly 6, the starch and plasticizer can be turned over by the rotation of the stirring blade 53, so that the accumulation of the starch and plasticizer is avoided, and the starch and plasticizer can be moved continuously by the continuous turning over, so that the discharging is facilitated.

[0054] As a preferred embodiment, the inner wall of the stirring bin 51 is provided with a guide wall inclined to the stirring blade 53, and the bottom of the stirring bin 51 is provided with a discharging port 54, the opening of the discharging port 54 is inclined to the inner wall of the blending barrel 3, and the discharging port 54 of the first discharging assembly 5 is larger than the discharging port 54 of the second discharging assembly 6.

[0055] In the embodiment, the water injection assembly 7 comprises:

[0056] A water storage bin 71 is fixed on the rotating shaft 4;

[0057] A water pressing block 72 is slidably arranged in the water storage bin 71, and a plurality of one-way air holes 74 are arranged through the water pressing block 72;

[0058] A lifting handle 73 is threadedly connected to the upper end surface of the water pressing block 72, the upper end surface of the lifting handle 73 is not higher than the upper end surface of the water storage bin 71, and the threaded hole connected with the water pressing block 72 penetrates the water pressing block 72; and

[0059] A hose 75 is connected to the lower end surface of the water storage bin 71 at one end and connected to the upper end surface of the first blending assembly 8 at the other end.

[0060] As a preferred embodiment, the water pressing block 72 will slowly descend in the water storage bin 71 by its own weight without external force.

[0061] It should be noted that when the water storage bin 71 is injected with water, the water pressing block 72 is first lifted upward by the lifting handle 73, and the one-way air hole 74 is opened during lifting to facilitate lifting, then the lifting handle 73 is disassembled, the water pressing block 72 is positioned by an auxiliary tool, and the water storage bin 71 is injected with water through the disassembly opening of the lifting handle 73, the amount of water is increased or decreased according to the amount of starch and plasticizer, then the lifting handle 73 is installed, the auxiliary tool is disassembled, and the driving motor is started to spray water on the inner wall of the blending barrel 3 through the first blending assembly 8 to increase the adhesion.

[0062] In the embodiment, the first blending assembly 8 comprises:

[0063] A fixed column 81 is provided with two groups of sliding grooves 811 and two groups of hinged joints 812 on the outer wall thereof;

[0064] The blending rod 82 is configured as two, slidably arranged in the sliding groove 811, and a compression spring is arranged between the sliding groove 811; and

[0065] The water outlet rod 83 is configured as two, hinged in the hinge interface 812, and a torsion spring is sleeved at the hinged position.

[0066] It should be noted that the blending rod 82 and the water outlet rod 83 have a clockwise movement trend by the compression spring and the torsion spring when not subjected to external force.

[0067] And when the rotating shaft 4 rotates clockwise, the discharge port 54 is always located in front of the blending rod 82, that is, when the starch and the plasticizer are first adhered to the inner wall of the blending barrel 3, the blending rod 82 is extruded.

[0068] As a preferred embodiment, the water outlet rod 83 is internally hollow, a water inlet is formed at the top, a plurality of mist-shaped nozzles 832 are fixed at one side of the end away from the fixed column 81, and a scraping plate 831 is fixed at the other side.

[0069] That is, when the structure of the starch and the plasticizer is destroyed, the rotating speed of the rotating shaft 4 is slow, at this time, the scraping plate 831 is not in contact with the inner wall of the blending barrel 3, when the initial blending of the starch and the plasticizer is completed, the rotating speed of the rotating shaft 4 is increased, and the scraping plate 831 is in contact with the inner wall of the blending barrel 3, thereby scraping the residual blending material on the inner wall of the blending barrel 3.

[0070] Specifically, first, an appropriate amount of water is added to the water injection assembly 7, and water is sprayed on the inner wall of the blending barrel 3 through the first blending assembly 8 to increase the adhesion of the inner wall of the blending barrel 3, then the starch and the plasticizer are respectively put into the discharge assembly one 5 and the discharge assembly two 6, and the starch and the plasticizer are extruded through the first blending assembly 8, thereby destroying the intermolecular and intramolecular hydrogen bond force existing in the starch, facilitating the transfer of the plasticizer to the starch molecules, improving the blending degree, after the initial blending is completed, the rotating speed of the first blending assembly 8 is increased, thereby scraping the blending material adhered to the inner wall of the blending barrel 3, and the blending material after the initial blending falls into the second blending space for secondary stirring and blending, and after the blending is completed, the material is collected through the discharge port 22.

[0071] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can make equivalent replacement or change according to the technical solution and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A blended composite system for preparing starch-based biodegradable plastics, characterized in that: include: Frame (1); The base plate (2) is fixed to the upper end face of the bracket (1), and a drive motor is fixed to its bottom; The mixing tank (3) is fixed to the upper end face of the base plate (2), and a cover plate is detachably installed on its top; The rotating shaft (4) is rotatably disposed within the base plate (2) and the cover plate, and is driven by the drive motor; Feeding assembly one (5) and feeding assembly two (6) are symmetrically fixed on the rotating shaft (4); Water injection components (7) are configured in two and symmetrically fixed on the rotating shaft (4); The first blending component (8) is fixed on the rotating shaft (4) and located below the first feeding component (5) and the second feeding component (6); A guide plate (21) is fixed on the upper surface of the base plate (2). A discharge port (22) is opened at the lowest point of the guide plate (21), and the discharge port (22) penetrates the base plate (2). The guide plate (21), the mixing barrel (3) and the first mixing component (8) together form a second mixing space. The rotating shaft (4) is fixed with multiple mixing blades at the position of the second mixing space. The mixing barrel (3) has a crown gear (31) fixed to the inner wall near the first feeding assembly (5). The first feeding assembly (5) and the second feeding assembly (6) have the same structure and both include: The mixing chamber (51) is fixed on the rotating shaft (4); A stirring shaft (52) is rotatably disposed within the stirring chamber (51) and arranged radially. The drive gear is fixed to one end of the stirring shaft (52) away from the rotating shaft (4) and meshes with the crown gear (31); Multiple stirring blades (53) are arranged and fixed at equal intervals on the rotating shaft (4); The first blend component (8) includes: The fixed column (81) has two sets of sliding grooves (811) and two sets of hinge interfaces (812) symmetrically opened on its outer wall; Two mixing rods (82) are configured and slidably disposed in the sliding groove (811), and a compression spring is disposed between them and the sliding groove (811); Two water outlet rods (83) are configured and hinged in the hinge interface (812), and a torsion spring is sleeved at the hinge position; The water outlet rod (83) is hollow inside, with a water inlet at its top. Multiple mist nozzles (832) are fixed at equal intervals on one side away from the fixed column (81), and a scraper (831) is fixed on the other side.

2. The blended composite system for preparing starch-based biodegradable plastics according to claim 1, characterized in that: The inner wall of the mixing chamber (51) is provided with a guide wall that is inclined toward the mixing blade (53), and the bottom of the mixing chamber (51) is provided with a discharge port (54). The opening of the discharge port (54) is inclined toward the inner wall of the mixing tank (3), and the discharge port (54) of the first discharge component (5) is larger than the discharge port (54) of the second discharge component (6).

3. The blended composite system for preparing starch-based biodegradable plastics according to claim 1, characterized in that: The water injection component (7) includes: A water storage tank (71) is fixed on the rotating shaft (4); A water-pressing block (72) is slidably disposed in the water storage tank (71), and multiple one-way air vents (74) are provided through the water-pressing block (72); A lifting handle (73) is threadedly connected to the upper end face of the water-pressing block (72), and the height of the upper end face of the lifting handle (73) does not exceed the upper end face of the water storage tank (71), and the threaded hole connected to the water-pressing block (72) penetrates the water-pressing block (72); The hose (75) is connected at one end to the lower end face of the water tank (71) and at the other end to the upper end face of the first blending assembly (8).

4. The blended composite system for preparing starch-based biodegradable plastics according to claim 3, characterized in that: The pressure block (72) will slowly descend within the water storage tank (71) by its own weight when not subjected to external force.

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