An apparatus for preparing a transparent toughening agent for polylactic acid

Abstract

The present invention specifically relates to a device for preparing a transparent toughening agent for polylactic acid, which belongs to the technical field of polymer material processing equipment. It includes a mobile vehicle frame body, on the upper side of which a lower double-ring sleeve is installed for loading materials. The inner wall of the upper side of the lower double-ring sleeve is slidably embedded with an upper double-ring sleeve to seal the entire inner cylinder cavity. A heating plate is provided at the bottom of the inner wall of the lower double-ring sleeve. After the upper double-ring sleeve is inserted downward into the lower double-ring sleeve, it is in a hovering state, and the heating plate is spaced below the upper double-ring sleeve. The two cylinder cavities have different mixing states, and the two cylinder cavities are in a separated state: Since there is a retaining wall in the middle of the inner side of the upper double-ring sleeve and a raised closing block is provided at the bottom, when the lower double-ring sleeve and the upper double-ring sleeve are combined, that is, the lifting component drives the upper double-ring sleeve to move downward so that the raised closing block is tightly plugged in the middle and bottom of the lower double-ring sleeve, the inner side of the lower double-ring sleeve can be divided into two separate cylinder cavities for separate mixing and stirring.

Description

Technical Field

[0001] The present invention specifically relates to an apparatus for preparing a transparent toughening agent for polylactic acid, and pertains to the technical field of polymer material processing equipment. Background Art

[0002] In the process of preparing a transparent toughening agent for polylactic acid, stirring and mixing is an extremely crucial step. As a basic material, polylactic acid needs to be fully mixed with various auxiliaries, additives, etc. to ensure that the performance of the toughening agent meets the expectations. The uniform mixing of different raw materials at the molecular level can promote the formation of a stable microstructure, thereby having a positive impact on the transparency and toughness of polylactic acid. For example, some special functional additives may need to be uniformly dispersed in the polylactic acid matrix to exert their improvement effects on toughening and transparency. If the stirring and mixing is insufficient, it may lead to local enrichment or uneven dispersion of the additives, thereby affecting the overall performance of the toughening agent. However, the current equipment used in this preparation process often only mixes through simple stirring blades during mixing. This single structure is difficult to cope with complex mixing requirements, and simple stirring blades cannot meet such diverse needs, resulting in poor mixing effects. In actual production, sometimes certain raw materials need to be separately mixed first, and then co-mixed after reaching a specific state. However, the existing equipment does not have the ability to separately mix or co-mix according to the usage requirements, which limits the flexibility of the production process and cannot achieve a more refined production process. In particular, it is necessary to first separately mix polylactic acid with a premixing agent evenly and then co-mix with other additives, but the existing equipment is difficult to achieve this step-by-step mixing operation. At the same time, during the co-mixing process, different production scales or product formulations may require different equipment capacities, but the existing equipment cannot adjust the equipment capacity according to the demand. When producing small batches of special specification products, an overly large equipment capacity may lead to waste of raw materials and uneven mixing. When it is necessary to expand the production scale, an overly small equipment capacity cannot meet the production requirements. This situation where the capacity cannot be flexibly adjusted seriously affects the use effect and production efficiency of the equipment. Therefore, it is necessary to propose an apparatus for preparing a transparent toughening agent for polylactic acid to improve the above problems. Summary of the Invention

[0003] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide an apparatus for preparing a transparent toughening agent for polylactic acid to solve the problems mentioned in the above background art.

[0004] To achieve the above purpose, the present invention is implemented through the following technical solutions: An apparatus for preparing a transparent toughening agent for polylactic acid, comprising a mobile vehicle frame body, on the upper side of which a lower double-ring sleeve is installed for loading materials, and an upper double-ring sleeve is slidably embedded in the inner wall of the upper side of the lower double-ring sleeve to seal the entire inner barrel cavity.

[0005] A heating plate is provided at the bottom of the inner wall of the lower double-ring sleeve. The upper double-ring sleeve is inserted downward into the lower double-ring sleeve and is in a suspended state, and the heating plate is spaced below the upper double-ring sleeve.

[0006] A lifting assembly is provided on the upper side of the upper double-ring sleeve and connected to the outer side of the lower double-ring sleeve to realize the up and down lifting of the upper double-ring sleeve;

[0007] The retaining wall is integrally arranged in the middle of the inner side of the upper double-ring sleeve. The bottom of the retaining wall is provided with a raised closing block, and the raised closing block is adapted to be plugged tightly into the middle and bottom of the inner side of the lower double-ring sleeve. When the upper double-ring sleeve moves downward, the raised closing block is driven to be plugged tightly into the middle and bottom of the lower double-ring sleeve, thereby dividing the inner side of the lower double-ring sleeve into two separate barrel cavities for mixing and stirring. When the upper double-ring sleeve moves upward, the raised closing block is driven to separate from the middle and bottom of the lower double-ring sleeve, allowing the materials of the two barrel cavities to be blended.

[0008] Upper stirring assemblies are installed in the middle of the upper double-ring sleeves corresponding to the upper sides of the two cylindrical cavities, and lower stirring assemblies are installed in the middle of the lower double-ring sleeves corresponding to the lower sides of the two cylindrical cavities.

[0009] A further improvement based on the above technical solution is that the upper stirring assembly includes an upper rotating shaft rod rotatably installed on the inner side of the upper double-ring sleeve, and the upper rotating shaft rod is equipped with multiple first stirring blades, the upper rotating shaft rods of the two upper stirring assemblies are connected by a transmission belt, and the top of the upper double-ring sleeve is equipped with an upper stirring motor for driving one of the upper rotating shaft rods to rotate.

[0010] A further improvement based on the above technical solution is that the lower stirring assembly includes a lower rotating shaft rod rotatably installed on the inner side of the lower double-ring sleeve, the two lower rotating shaft rods of the lower stirring assemblies are connected by a transmission belt, a second stirring blade is installed in the middle of the lower rotating shaft rod, and a lower stirring motor for driving the lower rotating shaft rod to rotate is installed on the lower side of the lower double-ring sleeve. A bearing is installed on the top of the lower rotating shaft rod, and a rotating plug rod is rotatably installed in the middle of the bearing, and the rotating plug rod is movably inserted through the middle of the bottom end of the upper rotating shaft rod.

[0011] A further improvement based on the above technical solution is that an inclined scraper is obliquely installed on the lower side of the lower rotating shaft rod, and the bottom of the inclined scraper is in a pointed shape and is against the inner bottom surface of the lower double-ring sleeve.

[0012] A further improvement based on the above technical solution is that it also includes an airtight convex edge, which is fixed to the outer edge of the top opening of the lower double-ring sleeve, and an inner notch is opened on the inner side of the airtight convex edge, and a rubber airbag ring is embedded inside the inner notch. The rubber airbag ring is in close contact with the outer surface of the upper double-ring sleeve, and the mobile frame is equipped with an air pump, and the air pump is connected to the rubber airbag ring through an air pipe.

[0013] Further improved based on the above technical solution, a rubber convex ring is fixedly arranged on the opening edge of the bottom of the upper double-ring sleeve, and is in close contact with the outer surface of the lower double-ring sleeve or the rubber airbag ring through the rubber convex ring.

[0014] Further improved based on the above technical solution, two connecting pipe fittings are installed in the middle of the convex closing block, electric valves are respectively installed at both ends of the connecting pipe fittings, two submersible pumps are installed inside the convex closing block, and the feeding end and the discharging end of the submersible pump are respectively communicated with both ends of the connecting pipe fittings, and a sealing gasket is compounded on the outer surface of the convex closing block.

[0015] Further improved based on the above technical solution, the lifting assembly includes a screw rod vertically and rotatably installed outside the upper double-ring sleeve, a lifting motor for driving the screw rod to rotate is installed at the top of the upper double-ring sleeve, there are two screw rods, and they are connected by a transmission belt, and outer connecting blocks are respectively installed on the front and rear sides of the lower double-ring sleeve, and the two screw rods respectively penetrate through the middle of the two outer connecting blocks by screw transmission.

[0016] Further improved based on the above technical solution, clamping pipes are vertically and fixedly arranged on the four sides of the mobile vehicle frame body, and the four clamping pipes are respectively clamped on the four sides of the lower double-ring sleeve, sliding guide rods are slidably inserted into the upper sides of the respective clamping pipes, and fixed arc plates are respectively fixedly arranged on the left and right sides of the upper double-ring sleeve, and the tops of the sliding guide rods are locked and connected with the fixed arc plates.

[0017] Further improved based on the above technical solution, a pneumatic device is installed at the top of the upper double-ring sleeve, discharging valves are installed at the bottoms of the lower double-ring sleeves corresponding to the two barrel cavities, a water inlet pipe is installed on one side of the lower double-ring sleeve, the water inlet pipe is respectively communicated with the two barrel cavities, two feeding ports corresponding to the barrel cavities are opened on the upper side of the upper double-ring sleeve, and a material cover is tightly installed on the feeding port.

[0018] By adopting the above technical solution, the present invention has the following advantages:

[0019] The two barrel cavities of the present invention have different mixing states, and the two barrel cavities are in a separated state: since a retaining wall is provided in the middle of the inner side of the upper double-ring sleeve and a convex closing block is provided at the bottom, when the lower double-ring sleeve and the upper double-ring sleeve are combined, that is, the lifting assembly drives the upper double-ring sleeve to displace downward so that the convex closing block is tightly plugged in the middle and bottom of the lower double-ring sleeve, the inner side of the lower double-ring sleeve can be divided into two separate barrel cavities for separate mixing and stirring;

[0020] The bottoms of the two barrel chambers are connected: when the upper double-ring sleeve moves upward and drives the raised sealing block to separate from the middle and bottom of the lower double-ring sleeve, the two barrel chambers can be connected to blend the internal materials. This layered mixing function can meet the needs of mixing different raw materials separately before blending them. That is, polylactic acid and different additives are first stirred separately in different barrel chambers, and then blended after reaching a specific state. This improves the degree of mixing refinement and solves the problem that existing equipment cannot mix or blend separately.

[0021] The upper stirring assembly and the lower stirring assembly of the present invention can rotate in opposite directions in the two barrel cavities, producing mixing and collision effects in different directions. At the same time, according to the use requirements, the upper double-ring sleeve can be reciprocated up and down, so that the upper stirring assembly can mix and stir materials at different positions of the barrel cavity along the lifting path, greatly improving the mixing effect and efficiency.

[0022] When the upper double-ring sleeve moves upward, the capacity of the entire barrel cavity can also be increased. This structure can adjust the effective mixing capacity of the equipment according to different production scales or product formulas, avoiding the problem of the inability of existing equipment to flexibly adjust the capacity and meet the production scale requirements, which can greatly improve the use effect and production efficiency of the equipment.

[0023] The upper rotating shaft of the upper stirring assembly of the present invention is sleeved on the rotating insertion rod of the lower stirring assembly. Therefore, when the upper stirring assembly follows the upper double-ring sleeve to move up and down, it can still be connected with the lower rotating shaft of the lower stirring assembly. The rotating insertion rod not only plays an effective guiding role, improving the lifting stability of the upper double-ring sleeve and the upper stirring assembly, but also improves the strength of the overall structure, allowing the upper rotating shaft and the lower rotating shaft to always remain on the same axis. The provision of the bearing can make the rotation connection between them smoother.

[0024] In addition, an inclined scraper is installed on the lower side of the lower shaft. The bottom of the scraper is pointed and contacts the inner bottom of the lower double-ring sleeve. During the mixing process, the material at the bottom can be effectively scraped off and pushed upward for re-mixing, preventing the material from settling at the bottom and ensuring the uniformity of the mixing.

[0025] A rubber airbag ring is provided on the inner side of the airtight convex edge, and a rubber convex ring is fixed on the edge of the bottom opening of the upper double-ring sleeve. These structures ensure good sealing performance of the lower double-ring sleeve and the upper double-ring sleeve in different states, preventing material leakage and outside air from entering and affecting the mixing effect. At the same time, the air pressure device installed on the top of the upper double-ring sleeve is used to adjust the air pressure environment of the cylinder cavity, which helps to prevent foaming during mixing and improve the mixing reaction effect. Moreover, the rubber airbag ring can be expanded and tightened on the outer surface of the upper double-ring sleeve, which can improve the airtightness between them. At the same time, it further strengthens the clamping effect of the lower double-ring sleeve on the upper double-ring sleeve and improves its stability.

[0026] A connecting pipe fitting is installed in the middle of the convex closing block. This setting can be achieved by controlling the electric valve and submersible pump of the connecting pipe fitting when it is necessary to convey and mix materials between two cylinder cavities, forming a lateral jet effect of one in and one out, further improving the lateral mixing and collision effect of materials in the cylinder cavity, and at the same time being applicable to the separated or connected state of the two cylinder cavities.

[0027] In the present invention, clamping pipes are vertically and fixedly arranged on the four sides of the movable vehicle frame body. The clamping pipes can not only limit the lower double-ring sleeve to prevent it from loosening and shifting, but also a sliding guide rod is slidably inserted into the upper side of the clamping pipe. By connecting the sliding guide rod with the upper double-ring sleeve, it can provide stable guidance for its lifting, ensure the stability of the equipment during operation, and is beneficial to improving the accuracy of mixing and the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] By reading the following detailed description of the non-restrictive embodiments with reference to the accompanying drawings, other features, objects and advantages of the present invention will become more apparent:

[0029] Figure 1 is a schematic structural diagram of the present invention;

[0030] Figure 2 For the present invention Figure 1 is a schematic structural diagram from another perspective of the present invention;

[0031] Figure 3 is a schematic internal structure diagram of the lower double-ring sleeve and the upper double-ring sleeve of the present invention;

[0032] Figure 4 is a schematic side elevation view of the upper double-ring sleeve of the present invention;

[0033] Figure 5 is a schematic structural diagram of the present invention in a state where two cylinder cavities are separated;

[0034] Figure 6 is a schematic structural diagram of the present invention in a state where two cylinder cavities are connected;

[0035] Figure 7 is a schematic connection diagram of the upper stirring assembly and the lower stirring assembly of the present invention;

[0036] Figure 8 is a schematic structural diagram of the lower stirring assembly of the present invention;

[0037] Figure 9 is a schematic structural diagram of the airtight convex edge of the present invention;

[0038] Figure 10 is a schematic structural diagram of the connecting pipe fitting and the sealing gasket of the present invention;

[0039] In the figure: mobile frame body 1, lower double-ring sleeve 2, outer connecting block 21, discharge valve 22, water inlet pipe 23, heating plate 24, upper double-ring sleeve 3, feed inlet 31, retaining wall 32, barrel cavity 33, convex closing block 34, sealing gasket 341, connecting pipe fitting 35, rubber convex ring 36, electric valve 37, submersible pump 38, screw rod 4, lifting motor 41, pneumatic device 5, clamping pipe 6, sliding guide rod 61, fixed arc plate 62, airtight convex edge 7, inner notch 71, rubber airbag ring 72, air pump 73, upper stirring assembly 8, upper stirring motor 80, upper rotating shaft rod 81, first stirring blade 82, lower stirring assembly 9, lower stirring motor 90, lower rotating shaft rod 91, bearing 92, rotating insertion rod 922, second stirring blade 93, inclined scraping plate 94. Detailed implementation manners

[0040] To make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.

[0041] As Figures 1-10 shown, the present invention provides a technical solution for an apparatus for preparing a polylactic acid transparent toughening agent, including a mobile frame body 1, on the upper side of which a lower double-ring sleeve 2 is installed for loading materials. The mobile frame body 1 serves as a support structure for the entire device. The upper double-ring sleeve 3 is slidably inserted into the inner wall of the upper side of the lower double-ring sleeve 2 to seal the entire inner barrel cavity. The mobile frame body 1 facilitates the movement of the entire device. The lower double-ring sleeve 2 is used for loading materials, and the upper double-ring sleeve 3 seals the inner barrel cavity of the lower double-ring sleeve 2. This structure provides a basic accommodation space for the mixing and stirring of materials. Among them, the heating plate 24 is arranged at the bottom of the inner wall of the lower double-ring sleeve 2. After the upper double-ring sleeve 3 is inserted downward into the lower double-ring sleeve 2, it is in a hovering state, and the heating plate 24 is spaced below the upper double-ring sleeve 3, that is, there is a certain space left. In this way, when the upper double-ring sleeve 3 is sleeved on the lower double-ring sleeve 2, it will not press against the heating plate 24 and the connecting pipe fitting 35, thus preventing it from being damaged. When heat treatment of materials is required, the heating plate 24 can provide heat to meet the temperature requirements in certain mixing processes, such as enabling the materials to reach a specific reaction temperature or improving the fluidity of the materials.

[0042] The retaining wall 32 of the present invention is integrally provided in the middle of the inner side of the upper double-ring sleeve 3, separating the two inner cavities of the upper double-ring sleeve 3. A raised sealing block 34 is provided at the bottom of the retaining wall 32, and the raised sealing block 34 can be tightly fitted into the middle and bottom of the inner side of the lower double-ring sleeve 2. Specifically, when the upper double-ring sleeve 3 moves downward, the raised sealing block 34 is driven to be tightly fitted into the middle and bottom of the inner side of the lower double-ring sleeve 2, thereby separating the inner side of the lower double-ring sleeve 2 into two separate cylindrical cavities 33 for mixing and stirring; when the upper double-ring sleeve 3 moves upward, the raised sealing block 34 is driven to separate from the middle and bottom of the lower double-ring sleeve 2, allowing the materials in the two cylindrical cavities 33 to be mixed together. Moreover, when the upper double-ring sleeve 3 moves upward, it can also increase the capacity of the two cylindrical cavities 33, thus meeting the requirements of different mixing processes.

[0043] Furthermore, two connecting pipe fittings 35 are installed in the middle of the raised sealing block 34. Electric valves 37 are respectively installed at both ends of the connecting pipe fittings 35. Two submersible pumps 38 are installed inside the raised sealing block 34, and the feeding end and discharging end of the submersible pump 38 are respectively communicated with both ends of the connecting pipe fittings 35. When it is necessary to convey and mix the materials between the two cylindrical cavities 33, it can be achieved by controlling the electric valves 37 of the connecting pipe fittings 35 and the submersible pumps 38, forming a side spray effect of one-in and one-out, further improving the side mixing and collision effect of the materials in the cylindrical cavity 33. A sealing gasket 341 is compounded on the outer surface of the raised sealing block 34, and the sealing gasket 341 is tightly connected to the middle and bottom of the inner side of the lower double-ring sleeve 2 to improve the sealing effect.

[0044] In the present invention, upper stirring assemblies 8 are installed in the middle of the upper double-ring sleeve 3 corresponding to the upper sides of the two cylindrical cavities 33. The upper stirring assembly 8 includes an upper rotating shaft rod 81 rotatably installed inside the upper double-ring sleeve 3, and two first stirring blades 82 are installed on the upper rotating shaft rod 81. The upper rotating shaft rods 81 of the two upper stirring assemblies 8 are connected by a transmission belt. An upper stirring motor 80 for driving one of the upper rotating shaft rods 81 to rotate is installed on the top of the upper double-ring sleeve 3. The upper stirring motor 80 drives the upper rotating shaft rod 81 to rotate, and then drives the first stirring blades 82 of the two upper rotating shaft rods 81 to rotate, stirring the materials in the cylindrical cavity 33. The two upper stirring assemblies 8 are connected by a transmission belt to achieve synchronous stirring of the two cylindrical cavities 33, reducing the investment of motors and improving the uniformity and efficiency of stirring.

[0045] And lower stirring assemblies 9 are installed in the middle of the lower double-ring sleeves 2 corresponding to the lower sides of the two barrel cavities 33. The lower stirring assembly 9 includes a lower rotating shaft rod 91 rotatably installed inside the lower double-ring sleeve 2. The lower rotating shaft rods 91 of the two lower stirring assemblies 9 are connected by a transmission belt. A second stirring blade 93 is installed in the middle of the lower rotating shaft rod 91. A lower stirring motor 90 for driving the lower rotating shaft rod 91 to rotate is installed on the lower side of the lower double-ring sleeve 2. The lower stirring motor 90 drives the two lower rotating shaft rods 91 to rotate synchronously. The lower rotating shaft rod 91 drives the second stirring blade 93 to stir the materials in the barrel cavity 33 synchronously. The rotating direction of the lower stirring motor 90 is opposite to that of the upper stirring motor 80. Therefore, the stirring directions of the first stirring blade 82 and the second stirring blade 93 are opposite, causing the materials to collide in different directions and improving the mixing and stirring effect.

[0046] In the above technical solution, a bearing 92 is installed at the top of the lower rotating shaft rod 91, and a rotating insertion rod 922 is rotatably installed in the middle of the bearing 92. The rotating insertion rod �22 is movably inserted through the middle of the bottom end of the upper rotating shaft rod 81. When the upper stirring assembly 8 moves up and down with the upper double-ring sleeve 3, it can still be in a connected state with the lower rotating shaft rod 91 of the lower stirring assembly 9. This not only plays a guiding role but also improves the stability of the entire structure. The bearing 92 can ensure the smooth rotation between the lower rotating shaft rod 91 and the upper rotating shaft rod 81 and reduce friction.

[0047] Furthermore, an inclined scraper 94 is installed obliquely on the lower side of the lower rotating shaft rod 91. The bottom of the inclined scraper 94 is in a sharp-corner shape and abuts against the inner bottom surface of the lower double-ring sleeve 2. During the stirring process, it can effectively scrape the materials at the bottom and push them upward for re-mixing, preventing the materials from settling and remaining at the bottom and ensuring the uniformity of mixing.

[0048] The present invention further includes an airtight flange 7. The airtight flange 7 is fixedly provided at the outer edge of the top opening of the lower double-ring sleeve 2. An inner notch 71 is opened inside the airtight flange 7. A rubber airbag ring 72 is embedded inside the inner notch 71. The rubber airbag ring 72 is in close contact with the outer surface of the upper double-ring sleeve 3. An air pump 73 is installed on the moving vehicle frame 1, and the air pump 73 is communicated with the rubber airbag ring 72 through an air pipe. Therefore, the rubber airbag ring 72 can be in close contact with the surface of the upper double-ring sleeve 3 under the action of the air pump 73, ensuring good sealing performance of the lower double-ring sleeve 2 and the upper double-ring sleeve 3 in different states, preventing material leakage and the entry of external air from affecting the mixing effect. Moreover, the rubber airbag ring 72 can also elastically press against the upper double-ring sleeve 3 to improve the connection effect.

[0049] Meanwhile, a rubber convex ring 36 is fixedly arranged on the bottom opening edge of the upper double-ring sleeve 3, and is in close contact with the outer surface of the lower double-ring sleeve 2 or the rubber airbag ring 72 through the rubber convex ring 36, further enhancing the sealing effect. Acting together with structures such as the rubber airbag ring 72, it prevents material leakage and outside air from entering.

[0050] In the above technical solution, in order to be able to realize the up and down lifting of the upper double-ring sleeve 3, so as to realize functions such as the conversion of the separation and connection states of the cylinder cavity 33, the lifting assembly is arranged on the upper side of the upper double-ring sleeve 3 and is connected to the outer side of the lower double-ring sleeve 2. The lifting assembly includes a screw rod 4 vertically and rotatably installed on the outer side of the upper double-ring sleeve 3. An elevating motor 41 for driving the rotation of the screw rod 4 is installed on the top of the upper double-ring sleeve 3. There are two screw rods 4, and they are connected by a transmission belt. Outer connection blocks 21 are respectively installed on the front and rear sides of the lower double-ring sleeve 2. The two screw rods 4 are respectively threaded through the middle parts of the two outer connection blocks 21. The elevating motor 41 drives the screw rod 4 to rotate. Through the threaded transmission between the screw rod 4 and the outer connection block 21, the two screw rods 4 are arranged one in front and one behind, and can synchronously and stably push the upper double-ring sleeve 3 to displace upward, and the transmission control precision of the screw rod 4 is high.

[0051] In this embodiment, clamping pipes 6 are respectively and vertically fixedly arranged on the four sides of the mobile frame body 1, and the four clamping pipes 6 are respectively clamped on the four sides of the lower double-ring sleeve 2. The clamping pipes 6 play a role in limiting the lower double-ring sleeve 2 to prevent it from loosening and shifting. A sliding guide rod 61 is slidably inserted into the upper side of each clamping pipe 6. Fixed arc plates 62 are respectively fixedly arranged on the left and right sides of the upper double-ring sleeve 3. The top of the sliding guide rod 61 is fixedly connected to the fixed arc plate 62. The sliding guide rod 61 provides stable guidance for the lifting of the upper double-ring sleeve 3, ensuring the stability of the equipment during operation, which is beneficial to improving the mixing accuracy and the service life of the equipment.

[0052] Moreover, a pneumatic device 5 is installed on the top of the upper double-ring sleeve 3. The pneumatic device 5 is an existing technology and is used to adjust the air pressure environment in the cylinder cavity 33, which helps to prevent foaming during mixing and improve the mixing reaction effect. Therefore, it will not be elaborated here. Discharge valves 22 are installed at the bottoms of the lower double-ring sleeves 2 corresponding to the two cylinder cavities 33. The discharge valves 22 are used to control the discharge of the mixed materials. A water inlet pipe 23 is installed on one side of the lower double-ring sleeve 2. The water inlet pipe 23 is respectively communicated with the two cylinder cavities 33. The water inlet pipe 23 can be used to inject water or other liquids into the cylinder cavities 33 to meet different mixing process requirements. Two feeding ports 31 corresponding to the cylinder cavities 33 are opened on the upper side of the upper double-ring sleeve 3. The feeding ports 31 facilitate adding materials into the cylinder cavities 33, and a material cover is tightly installed on the feeding ports 31. This feeding and discharging structure facilitates the input of raw materials, the replenishment of water during the processing process, and the extraction of finished products or intermediate products, improving the operation convenience of the equipment.

[0053] More specifically, when the two barrel cavities 33 need to be separated and mixed separately and then mixed together, the raised sealing block 34 is tightly plugged into the middle and bottom surface of the lower double-ring sleeve 2, so that the two barrel cavities 33 form a separated state and can be mixed separately. It is only necessary to open the material covers of the two feed ports 31, and put the materials to be mixed into the two feed ports 31 respectively. Then, by starting the upper stirring motor 80 and the lower stirring motor 90 to rotate in opposite directions, the corresponding upper rotating shaft 81 and the lower rotating shaft 91 are rotated to drive the first stirring blade 82 and the second stirring blade 83 to rotate. The blades 93 rotate in opposite directions to mix the materials inside the barrel cavity 33; during this period, the air pressure in the barrel cavity 33 can be adjusted by the air pressure device 5 according to the use requirements. When the material needs to be heated, the heating plate 24 can provide heat to meet the temperature requirements of certain mixing processes, so that the material reaches a specific reaction temperature or improves the fluidity of the material, etc. Water can also be transported to the barrel cavity 33 through the water inlet pipe 23; when the two barrel cavities 33 are mixed, the screw 4 is driven to rotate by the lifting motor 41, and the screw 4 is threaded to drive the external connection block 2 1, causing the upper double-ring sleeve 3 to slide upward and rise on the lower double-ring sleeve 2, while the upper rotating shaft rod 81 will slide upward steadily on the rotating plug rod 922, and the sliding guide rod 61 will slide upward steadily on the clamping tube 6. Through this triple guiding sliding effect, the structural stability of the overall lifting activity of the upper double-ring sleeve 3 can be greatly improved, and after the sliding is completed, the air pump 73 can be used to inflate the rubber airbag ring 72 to make it expand tightly on the outer surface of the upper double-ring sleeve 3, which can improve the air tightness between them and further strengthen the lower double-ring sleeve. The barrel 2 has a clamping effect on the upper double-ring sleeve 3, thereby improving its stability. When the upper double-ring sleeve 3 moves upward to drive the raised closing block 34 to separate from the middle and bottom surface of the lower double-ring sleeve 2, the two barrel chambers 33 are connected. The materials preliminarily mixed in the two barrel chambers 33 can be mixed together again. During the blending process, the electric valve 37 and the submersible pump 38 of the two connecting pipes 35 can be controlled to realize the mutual lateral injection and delivery of the materials between the two barrel chambers 33, thereby increasing the flow speed and mixing collision effect of the materials inside the barrel chamber 33, thereby improving the mixing effect and efficiency.

[0054] In addition, the upper double-ring sleeve 3 is displaced upward and fixed at a certain height, which can increase the internal capacity of the two barrel cavities 33 to meet the mixing needs of a larger capacity. During the mixing period, the upper double-ring sleeve 3 can be lifted and lowered reciprocatingly by the lifting motor 41 according to the use requirements, so that the first stirring blade 82 can be lifted and lowered synchronously, and the materials at different heights in the barrel cavity 33 are mixed and stirred, further improving the mixing efficiency. There is no need to transport them to other equipment for mixing reaction. After the mixing reaction is completed, the discharge valve 22 can be opened to discharge them outward.

[0055] The above embodiments illustrate and describe the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. An apparatus for preparing a transparent toughening agent for polylactic acid, characterized in that, Comprising: A moving frame body (1) with a lower double-ring sleeve (2) installed on its upper side for loading materials. The upper double-ring sleeve (3) is slidably inserted into the inner wall of the upper side of the lower double-ring sleeve (2) to enclose the entire inner cylinder cavity; A heating plate (24) is provided at the bottom of the inner wall of the lower double-ring sleeve (2). After the upper double-ring sleeve (3) is inserted downward into the lower double-ring sleeve (2), it is in a hovering state, and the heating plate (24) is spaced below the upper double-ring sleeve (3); A lifting assembly is provided on the upper side of the upper double-ring sleeve (3) and connected to the outside of the lower double-ring sleeve (2) to realize the up and down lifting of the upper double-ring sleeve (3); A retaining wall (32) is integrally provided in the middle of the inner side of the upper double-ring sleeve (3). A convex closing block (34) is provided at the bottom of the retaining wall (32), and the convex closing block (34) is adapted to be tightly plugged in the middle and bottom of the inner side of the lower double-ring sleeve (2); when the upper double-ring sleeve (3) moves downward, the convex closing block (34) is tightly plugged in the middle and bottom of the lower double-ring sleeve (2), so as to divide the inner side of the lower double-ring sleeve (2) into two separate cylinder cavities (33) for mixing and stirring; when the upper double-ring sleeve (3) moves upward, the convex closing block (34) is disengaged from the middle and bottom of the lower double-ring sleeve (2) to allow the materials in the two cylinder cavities (33) to be mixed together; Upper stirring assemblies (8) are installed in the middle of the upper double-ring sleeve (3) corresponding to the upper sides of the two cylinder cavities (33), and lower stirring assemblies (9) are installed in the middle of the lower double-ring sleeve (2) corresponding to the lower sides of the two cylinder cavities (33); The upper stirring assembly (8) includes an upper rotating shaft rod (81) rotatably installed inside the upper double-ring sleeve (3), and a plurality of first stirring blades (82) are installed on the upper rotating shaft rod (81). The upper rotating shaft rods (81) of the two upper stirring assemblies (8) are connected by a transmission belt, and an upper stirring motor (80) for driving one of the upper rotating shaft rods (81) to rotate is installed at the top of the upper double-ring sleeve (3); The lower stirring assembly (9) includes a lower rotating shaft rod (91) rotatably installed inside the lower double-ring sleeve (2). The lower rotating shaft rods (91) of the two lower stirring assemblies (9) are connected by a transmission belt. A second stirring blade (93) is installed in the middle of the lower rotating shaft rod (91). A lower stirring motor (90) for driving the lower rotating shaft rod (91) to rotate is installed on the lower side of the lower double-ring sleeve (2). A bearing (92) is installed at the top of the lower rotating shaft rod (91), and a rotating insertion rod (922) is rotatably installed in the middle of the bearing (92). The rotating insertion rod (922) is movably inserted through the middle of the bottom end of the upper rotating shaft rod (81); An inclined scraping plate (94) is inclinedly installed on the lower side of the lower rotating shaft rod (91). The bottom of the inclined scraping plate (94) is in a sharp corner shape and abuts against the inner bottom surface of the lower double-ring sleeve (2); Two connecting pipe fittings (35) are installed in the middle of the raised closing block (34). Electric valves (37) are installed at both ends of the connecting pipe fittings (35). Two submersible pumps (38) are installed inside the raised closing block (34). The feeding end and the discharging end of the submersible pump (38) are respectively communicated with both ends of the connecting pipe fittings (35). A sealing gasket (341) is compounded on the outer surface of the raised closing block (34).

2. The device for preparing a polylactic acid transparent toughening agent according to claim 1, characterized in that, An airtight convex edge (7) is further included. The airtight convex edge (7) is fixedly arranged on the outer edge of the top opening of the lower double-ring sleeve (2). An inner notch (71) is opened inside the airtight convex edge (7). A rubber airbag ring (72) is embedded inside the inner notch (71). The rubber airbag ring (72) is in close contact with the outer surface of the upper double-ring sleeve (3). An air pump (73) is installed on the mobile vehicle frame body (1). The air pump (73) is communicated with the rubber airbag ring (72) through an air pipe.

3. The device for preparing a transparent toughening agent for polylactic acid according to claim 2, wherein, A rubber convex ring (36) is fixedly arranged on the edge of the bottom opening of the upper double-ring sleeve (3), and is in close contact with the outer surface of the lower double-ring sleeve (2) or the rubber airbag ring (72) through the rubber convex ring (36).

4. An apparatus for preparing a transparent toughening agent for polylactic acid according to claim 1, characterized in that, The lifting assembly includes a screw rod (4) vertically and rotatably installed on the outside of the upper double-ring sleeve (3). A lifting motor (41) for driving the screw rod (4) to rotate is installed on the top of the upper double-ring sleeve (3). There are two screw rods (4), and they are connected by a transmission belt. Outer connecting blocks (21) are respectively installed on the front and rear sides of the lower double-ring sleeve (2). The two screw rods (4) are respectively threadedly driven through the middle of the two outer connecting blocks (21).

5. The device for preparing a transparent toughening agent for polylactic acid according to claim 1, wherein, Card pipes (6) are vertically and fixedly arranged on the four sides of the mobile vehicle frame body (1), and the four card pipes (6) are respectively clamped on the four sides of the lower double-ring sleeve (2). A sliding guide rod (61) is slidably inserted into the upper side of each card pipe (6). Fixed arc plates (62) are respectively fixedly arranged on the left and right sides of the upper double-ring sleeve (3). The top of the sliding guide rod (61) is fixedly connected to the fixed arc plate (62).

6. The apparatus for preparing a polylactic acid transparent toughening agent according to claim 5, wherein, A pneumatic device (5) is installed on the top of the upper double-ring sleeve (3). Discharge valves (22) are installed at the bottom of the lower double-ring sleeve (2) corresponding to the two barrel cavities (33). A water inlet pipe (23) is installed on one side of the lower double-ring sleeve (2). The water inlet pipe (23) is communicated with the two barrel cavities (33) respectively. Two feeding ports (31) corresponding to the barrel cavities (33) are opened on the upper side of the upper double-ring sleeve (3), and a material cover is tightly installed on the feeding port (31).

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