Thermoplastic resin blending device

Abstract

The utility model provides a thermoplastic resin blending device, which relates to the field of composite material preparation, and comprises a fixing sleeve, a blending pipeline, a T-shaped three-way joint, a rubber mixing core and a heating rod, the blending pipeline is installed in the fixing sleeve and arranged in the longitudinal direction of the fixing sleeve. The T-shaped three-way joint is mounted at the top end of the blending pipeline, the three-way joint is communicated with the blending pipeline, and the other two channels of the three-way joint extend out of the fixing sleeve and are respectively communicated with the corresponding plastic extruding machines; the rubber mixing core is mounted in the blending pipeline and is used for mixing resin flow flowing through the blending channel; and the heating rod is mounted on the fixing sleeve and uniformly surrounds the blending pipeline, so that the problem that different resins are not fully mixed under the condition of different proportions in the prior art can be effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of composite material preparation, and in particular to a thermoplastic resin blending device. Background Technology

[0002] In the preparation of composite materials, mixing two resins (i.e., resin blending) is an important material modification strategy. Its core purpose is to overcome the performance limitations of a single resin through the synergistic effect of different resins, such as improving mechanical properties and strengthening interfaces, so as to optimize the comprehensive performance of the material. Therefore, it shows great development prospects in the fields of national defense, aerospace, and rail transportation.

[0003] Currently, the commonly used technology for thermoplastic resin blending is twin-screw extruder blending. This technology mainly utilizes mechanical actions such as shearing, compression, and stretching, combined with heating and heat transfer operations, to promote thorough and uniform resin mixing. Twin-screw extruders, with their highly efficient mechanical action, significantly improve the mixing effect. While twin-screw extruders primarily rely on the strong shearing action in the meshing zone to achieve resin mixing, they also have several typical problems:

[0004] First, the high speed and high torque characteristics may cause excessive shearing in heat-sensitive or high-viscosity resins, leading to a decline in physical or chemical properties. Second, the modular screw assembly of twin-screw extruders requires optimized design based on material characteristics, such as screw gap. Narrow gaps facilitate dispersion but easily increase shear heat, while wide gaps may lead to insufficient mixing. For reactive extrusion or blends requiring long residence times, this may result in unreacted components remaining. Third, key components such as the screw and barrel liner need to be replaced regularly due to long-term exposure to high shear and friction. The high speed characteristics result in higher energy consumption per unit output than single-screw extruders, and improper formulation adjustments may further increase energy consumption. Therefore, this technology has high energy consumption and maintenance costs. Fourth, twin-screw extruders use a starvation feeding mechanism. If there are large differences in particle morphology or flowability between resin A and resin B, uneven feeding may occur, affecting the blending ratio. Utility Model Content

[0005] In order to solve the technical problems existing in the prior art and reduce the technical cost, this utility model provides a thermoplastic resin blending device to solve the technical problems of excessive shearing and uneven feeding during the resin mixing process.

[0006] The technical solution is as follows:

[0007] A thermoplastic resin blending apparatus, comprising:

[0008] The retaining sleeve is removable;

[0009] A blending conduit, wherein the blending conduit is installed inside the fixed sleeve and is arranged along the longitudinal direction of the fixed sleeve;

[0010] A T-shaped tee connector is installed at the top of the blending pipe and is connected to the blending pipe. The other two channels of the tee connector extend from the fixing sleeve and are respectively connected to the corresponding extruders.

[0011] A mixing core, which is installed inside the blending pipe and is used to mix the resin flow flowing through the blending channel;

[0012] A heating rod is mounted on the fixed sleeve and uniformly surrounds the blending pipe around its circumference.

[0013] Optionally, the device further includes an extrusion head, which is installed at the bottom end of the blending channel and communicates with the blending channel, and the extrusion head is disposed outside the fixed sleeve.

[0014] Optionally, the mixing core includes m helical blades, which are connected sequentially from top to bottom;

[0015] Among them, from top to bottom, the top boundary of the (n+1)th spiral intersects with the bottom boundary of the nth spiral blade to form an x-shaped structure; n+1≤m and m≥12.

[0016] Optionally, any two adjacent spiral blades can be connected by welding, with the welding point being the intersection of the X-shaped structure.

[0017] Optionally, the fixing sleeve includes a first fixing cylinder and a second fixing cylinder that are fastened together on the left and right sides, and the first fixing sleeve and the second fixing sleeve are fixedly connected.

[0018] A longitudinal semi-circular channel is provided on the side wall where the first fixed cylinder and the second fixed cylinder are engaged with each other;

[0019] A transverse semicircular channel is provided at the top of the longitudinal semicircular channel of the first fixed cylinder, and the transverse semicircular channel of the first fixed cylinder is connected to the longitudinal semicircular channel of the first fixed cylinder.

[0020] A transverse semicircular channel is provided at the top of the longitudinal semicircular channel of the second fixed cylinder, and the transverse semicircular channel of the second fixed cylinder is connected to the longitudinal semicircular channel of the second fixed cylinder.

[0021] When the first fixing sleeve and the second fixing sleeve are engaged, the mixing pipe is installed in the cylindrical channel formed by the longitudinal semicircular channel of the first fixing cylinder and the longitudinal semicircular channel of the second fixing cylinder.

[0022] The two horizontal connectors of the T-shaped tee are collinear and installed in the cylindrical channel formed by the transverse semicircular channel of the first fixed cylinder and the transverse semicircular channel of the second fixed cylinder.

[0023] Optionally, the first fixed cylinder is provided with a mounting groove on the side opposite to the longitudinal semicircular channel, and the second fixed cylinder is provided with a mounting groove on the side opposite to the longitudinal semicircular channel. The mounting groove is used to install the heating rod.

[0024] The heating rod is arranged longitudinally along the fixed sleeve.

[0025] Optionally, the number of heating rods is 4, with 2 mounting slots on the first fixed cylinder and 2 mounting slots on the second fixed cylinder.

[0026] Optionally, a temperature measuring hole is provided on the fixing sleeve.

[0027] Optionally, the longitudinal joint of the T-shaped tee is threadedly connected to the blending pipe;

[0028] The blending pipeline is a cylindrical steel pipe.

[0029] Optionally, the first fixing sleeve and the second fixing sleeve are fixedly connected by countersunk bolts.

[0030] The beneficial effects of the technical solution provided by this utility model embodiment include at least the following:

[0031] The device contains a mixing core. During the mixing process, after the resin flows into the mixing pipe, the mixing core can perform shear dispersion and laminar flow mixing, thereby ensuring that the two resins are fully mixed and improving the uniformity of resin mixing.

[0032] This device is equipped with a heating rod with thermocouple temperature sensing holes on its surface. During use, heating can be achieved by inserting the heating rod and combining it with the thermocouple temperature sensor. This allows for precise control of the temperature inside the mold, keeping the resin in a molten and flowing state, effectively reducing the resin viscosity, and thus significantly improving the resin mixing efficiency.

[0033] The thermoplastic resin blending device of this invention can effectively solve the problem of uneven and insufficient resin mixing in the prior art. It has the characteristics of simple structure, convenient operation and strong applicability. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the overall structure of the device provided in this embodiment of the utility model;

[0036] Figure 2 This is a first-view exploded view of the device provided in this embodiment of the utility model;

[0037] Figure 3 This is a second-view exploded view of the device provided in this embodiment of the utility model;

[0038] Figure 4 This is an exploded view of the fixing sleeve provided in an embodiment of the present utility model;

[0039] Figure 5 This is a schematic diagram of the x-shaped structure formed by connecting the top boundary of the (n+1)th spiral blade and the bottom boundary of the nth spiral blade of the mixing core provided in this embodiment of the utility model.

[0040] Figure 6 This is a third-view exploded view of the device provided in this embodiment of the utility model.

[0041] Icon labels:

[0042] 1. T-shaped tee connector; 2. Blending pipe; 3. Extrusion head; 4. Mixing core; 51. First fixed cylinder; 52. Second fixed cylinder; 6. Heating rod; 7. Temperature measuring hole; 8. Extruder. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0044] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "an," "a," or "the" do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. The terms "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0045] It should be noted that the terms "upper", "lower", "left", "right", "front", and "back" used in this utility model are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0046] To address the existing technical challenges, this embodiment provides a thermoplastic resin blending device. The technical principle is as follows: two single-screw extruders (extruders) respectively push thermoplastic resins of different components into the blending device. The mixing core inside the blending device performs multiple split mixing of the two-component resins, ultimately achieving complete mixing of the thermoplastic resins.

[0047] like Figures 1 to 6 A thermoplastic resin blending device includes: a fixed sleeve, a blending pipe 2, a T-shaped tee connector 1, a mixing core 4, and a heating rod 6. The fixed sleeve is detachable. The blending pipe 2 is installed inside the fixed sleeve and is arranged along the longitudinal direction of the fixed sleeve. The T-shaped tee connector 1 is installed at the top of the blending pipe 2 and communicates with the blending pipe 2. The other two channels of the T-shaped tee connector 1 extend from the fixed sleeve and are respectively connected to the corresponding extruders 8. The mixing core 4 is installed inside the blending pipe 2 and is used to mix the resin flow flowing through the blending channel. The heating rod 6 is installed on the fixed sleeve and uniformly surrounds the blending pipe 2.

[0048] The device also includes an extrusion head 3, which is installed at the bottom of the blending channel and communicates with the blending channel. The extrusion head 3 is located outside the fixed sleeve. Inside the fixed sleeve, a tee connector 1 and a blending pipe 2 are arranged sequentially from top to bottom. The extrusion head 3 is located outside the fixed sleeve and is threadedly connected to the blending channel. The extrusion head 3 is located at the bottom of the blending channel.

[0049] In one specific embodiment, the mixing core 4 includes m helical blades, which are connected sequentially from top to bottom;

[0050] In this structure, from top to bottom, the top boundary of the (n+1)th spiral intersects with the bottom boundary of the nth spiral blade to form an X-shaped structure; n+1≤m and m≥12, any two adjacent spiral blades are connected by welding, and the welding point is the intersection point of the X-shaped structure.

[0051] The mixing core 4 is composed of multiple sets of spirally interwoven mixing units (such as spiral blades). When the resin flows into the mixing pipe 2 and then through the mixing core 4, it is repeatedly divided, sheared, and recombinated by the spiral blades, forming alternating laminar flow to achieve uniform mixing. The mixing core 4 is a non-moving component, relying on the fluid's own kinetic energy to complete the mixing. It ensures mixing uniformity by dividing, shearing, and recombinizing the adhesive, eliminating localized deviations in the A / B ratio, avoiding incomplete curing or insufficient strength, and achieving the desired mixing effect.

[0052] In one specific embodiment, the fixing sleeve includes a first fixing cylinder 51 and a second fixing cylinder 52 that are fastened together on the left and right sides, and the first fixing sleeve and the second fixing sleeve are fixedly connected.

[0053] A longitudinal semi-circular channel is provided on the side wall of the first fixed cylinder 51 and the second fixed cylinder 52 that are engaged with each other;

[0054] A transverse semicircular channel is provided at the top of the longitudinal semicircular channel of the first fixed cylinder 51, and the transverse semicircular channel of the first fixed cylinder 51 is connected to the longitudinal semicircular channel of the first fixed cylinder 51.

[0055] A transverse semicircular channel is provided at the top of the longitudinal semicircular channel of the second fixed cylinder 52, and the transverse semicircular channel of the second fixed cylinder 52 is connected to the longitudinal semicircular channel of the second fixed cylinder 52.

[0056] When the first fixing sleeve and the second fixing sleeve are engaged, the mixing pipe 2 is installed in the cylindrical channel formed by the longitudinal semicircular channel of the first fixing cylinder 51 and the longitudinal semicircular channel of the second fixing cylinder 52.

[0057] The two horizontal connectors of the T-shaped tee connector 1 are collinear and installed in the cylindrical channel formed by the transverse semicircular channel of the first fixed cylinder 51 and the transverse semicircular channel of the second fixed cylinder 52.

[0058] The first fixing cylinder 51 has an installation groove on the side opposite to the longitudinal semicircular channel, and the second fixing cylinder 52 has an installation groove on the side opposite to the longitudinal semicircular channel. The installation groove is used to install the heating rod 6.

[0059] The heating rod 6 is arranged longitudinally along the fixed sleeve, and the heating rod 6 makes the resin easier to mix.

[0060] The first fixed cylinder 51 and the second fixed cylinder 52 are arranged symmetrically on the left and right and have the same structure.

[0061] The T-joint 1, blending pipe 2, extrusion head 3, and mixing core 4 are connected to form a T-shaped mold.

[0062] After the first fixed cylinder 51 and the second fixed cylinder 52 are fitted onto its surface to form a cuboid mold: the left and right interfaces of the three-way connector 1 are respectively connected to the glue outlet of the extruder 8; after the resin flows into the mixing pipe 2, it begins to be fully mixed under the action of the mixing core 4; after reaching the extruder head 3, it flows out; the first fixed cylinder 51 and the second fixed cylinder 52 are provided with heating holes for installing heating rods 6; the first fixed cylinder 51 is provided with thermocouple temperature measuring holes 7.

[0063] In one specific embodiment, the number of heating rods 6 is 4, the first fixing cylinder 51 has 2 mounting slots, and the second fixing cylinder 52 has 2 mounting slots.

[0064] The longitudinal joint of the T-shaped tee connector 1 is threadedly connected to the blending pipe 2;

[0065] The blending pipe 2 is a cylindrical steel pipe.

[0066] The first fixing sleeve and the second fixing sleeve are fixedly connected by countersunk bolts.

[0067] In one specific implementation, the lower end of the tee connector 1 and the upper end of the blending pipe 2 are connected by threads, and the left and right ends are connected by threads to the blending pipes 2 extending from two identical extruders 8. After the resin flows out of the extruder 8, it flows into the tee connector 1. After the mixed resin flows out of the blending pipe 2, it directly enters the extrusion port, is squeezed into a bundle, and then flows out.

[0068] In one embodiment of this example, one connector of the threaded tee connector 1 is connected to an extruder 8 at the injection port. Then, the other horizontally positioned connector of the tee connector 1 is connected to another extruder 8 via threads. The bottom connector of the tee connector 1 is connected to the blending pipe 2 via threads. Simultaneously, the mixing core 4 is placed inside the blending pipe 2. The bottom boundary dimension of the mixing core 4 is larger than the inlet dimension of the extruder head 3, ensuring the mixing core 4 is installed within the blending pipe 2. The lower part of the blending pipe 2 is connected to the extruder head 3 via threads. Next, the first fixing cylinder 51 and the second fixing cylinder 52 are fitted onto the outside of the above-described structure using countersunk bolts to form a single unit. A custom-sized heating rod 6 is inserted into the heating rod 6 holes of the first fixing cylinder 51 and the second fixing cylinder 52. A thermocouple temperature sensor is installed into the temperature measuring hole 7 of the mold.

[0069] Turn on the heating rod 6 to preheat the mold and observe the temperature. When the temperature rises to the set temperature, turn on the two extruders 8 and adjust the ratio of the two resins by adjusting the extrusion rate of the extruders 8. When the two resins reach the mixing pipe 2 through the three-way connector 1, they are fully mixed under the action of the mixing core 4 and then flow out through the extrusion head 3 mold.

[0070] In addition, during use, heating can be achieved by inserting the heating rod 6 and combining it with a thermocouple temperature sensor. This allows for precise control of the temperature inside the mold, keeping the resin in a molten and flowing state, effectively reducing the viscosity of the resin, and thus significantly improving the mixing efficiency of the two resins.

[0071] The thermoplastic resin fiber impregnation device of this invention can effectively solve the problem of insufficient and uneven resin mixing in the prior art. It has the characteristics of simple structure, convenient operation and strong applicability, and is especially suitable for laboratory and industrial production environments.

[0072] The device contains a mixing core 4. During the mixing process, after the resin flows into the mixing pipe 2, the mixing core 4 can perform shear dispersion and laminar flow mixing, thereby ensuring that the two resins are fully mixed and improving the uniformity of resin mixing.

[0073] This device is equipped with a heating rod 6, and a thermocouple temperature measuring hole 7 on its surface. During use, heating can be achieved by inserting the heating rod 6 and combining it with the thermocouple temperature sensor. This allows for precise control of the temperature inside the mold, keeping the resin in a molten and flowing state, effectively reducing the resin viscosity, and thus significantly improving the resin mixing efficiency.

[0074] The thermoplastic resin blending device of this invention can effectively solve the problem of uneven and insufficient resin mixing in the prior art. It has the characteristics of simple structure, convenient operation and strong applicability.

[0075] The following points need to be explained:

[0076] (1) The accompanying drawings of this utility model embodiment only involve the structure involved in this utility model embodiment. Other structures can refer to the general design.

[0077] (2) For clarity, the thickness of layers or regions is enlarged or reduced in the drawings used to describe embodiments of the present invention, i.e., these drawings are not drawn to scale. It is understood that when an element such as a layer, film, region or substrate is referred to as being “above” or “below” another element, the element may be “directly” located “above” or “below” the other element or there may be intermediate elements.

[0078] (3) Where there is no conflict, the embodiments of this utility model and the features in the embodiments can be combined with each other to obtain new embodiments.

[0079] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. The protection scope of this utility model shall be determined by the protection scope of the claims.

Claims

1. A thermoplastic resin blending apparatus characterized by comprising: The device comprises: a fixed sleeve supporting disassembly; a blending pipeline installed in the fixed sleeve and arranged in the longitudinal direction of the fixed sleeve; a T-shaped tee joint installed at the top end of the blending pipeline, the tee joint being in communication with the blending pipeline, the other two channels of the tee joint extending out of the fixed sleeve and being in communication with corresponding extruders respectively; a rubber mixing core installed in the blending pipeline and used for mixing resin flow through the blending pipeline; a heating rod installed on the fixed sleeve and uniformly surrounding the blending pipeline in a ring shape.

2. The thermoplastic resin blending apparatus according to claim 1, wherein The device further comprises an extrusion head installed at the bottom end of the blending pipeline and in communication with the blending pipeline, the extrusion head being arranged outside the fixed sleeve.

3. The thermoplastic resin blending apparatus according to claim 1, wherein The rubber mixing core comprises m spiral blades connected in sequence from top to bottom; wherein, from top to bottom, the top end boundary of the n+1th spiral blade intersects with the bottom end boundary of the nth spiral blade to form an x-shaped structure; n+1≤m and m≥12.

4. The thermoplastic resin blending apparatus according to claim 3, wherein Any two adjacent spiral blades are connected by welding, and the welding points are the intersection points of the x-shaped structure.

5. The thermoplastic resin blending apparatus according to claim 4, wherein The fixed sleeve comprises a first fixed cylinder and a second fixed cylinder oppositely buckled, and the first fixed sleeve and the second fixed sleeve are fixedly connected; longitudinal semicircular channels are arranged on the side walls of the oppositely buckled first fixed cylinder and second fixed cylinder; a horizontal semicircular channel is arranged at the top of the longitudinal semicircular channel of the first fixed cylinder, and the horizontal semicircular channel of the first fixed cylinder is in communication with the longitudinal semicircular channel of the first fixed cylinder; a horizontal semicircular channel is arranged at the top of the longitudinal semicircular channel of the second fixed cylinder, and the horizontal semicircular channel of the second fixed cylinder is in communication with the longitudinal semicircular channel of the second fixed cylinder; when the first fixed sleeve and the second fixed sleeve are buckled, the blending pipeline is installed in the cylindrical channel formed by the longitudinal semicircular channel of the first fixed cylinder and the longitudinal semicircular channel of the second fixed cylinder; the two horizontal joints of the T-shaped tee joint are collinear and installed in the cylindrical channel formed by the horizontal semicircular channel of the first fixed cylinder and the horizontal semicircular channel of the second fixed cylinder.

6. The thermoplastic resin blending device according to claim 5, wherein: mounting grooves are arranged on the side of the first fixed cylinder away from the longitudinal semicircular channel, and mounting grooves are arranged on the side of the second fixed cylinder away from the longitudinal semicircular channel, the mounting grooves being used for mounting the heating rods; the heating rods are arranged in the longitudinal direction of the fixed sleeve.

7. The thermoplastic resin blending apparatus according to claim 6, wherein The number of the heating rods is four, there are two mounting grooves on the first fixed cylinder, and there are two mounting grooves on the second fixed cylinder.

8. The thermoplastic resin blending device according to claim 7, wherein: temperature measuring holes are arranged on the fixed sleeve.

9. The thermoplastic resin blending apparatus according to claim 8, wherein the longitudinal joint of the T-shaped tee joint is in threaded communication with the blending pipeline; the blending pipeline is a cylindrical steel pipe.

10. The thermoplastic resin blending apparatus according to claim 9, wherein the first fixed sleeve and the second fixed sleeve are fixedly connected by countersunk bolts.

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