Double-screw extrusion experiment machine

Abstract

The utility model discloses a double-screw extrusion experiment machine which comprises a machine table, a power assembly, an extrusion assembly and a temperature control module, and the power assembly is connected to the upper end face of the machine table; the extrusion assembly comprises a split type machine barrel and two screws, the machine barrel comprises an upper machine barrel plate and a lower machine barrel plate, the two ends of the upper machine barrel plate and the two ends of the lower machine barrel plate are fixed through fast-assembly clamps to be assembled into a whole, a double-screw cavity is formed between the upper machine barrel plate and the lower machine barrel plate, the two screws are arranged in the double-screw cavity and connected with the power assembly, and the power assembly is connected with the machine barrel. The input end of the cylinder is connected with a hopper, and the output end of the cylinder is connected with a die head; the temperature control module comprises a temperature control template and a water cooling pipeline assembly, and the temperature control template is connected to the extrusion assembly. The machine barrel is designed to be of a split structure, the upper machine barrel plate and the lower machine barrel plate of the machine barrel can be disassembled by disassembling the fast-assembly clamps at the two ends, cleaning is convenient, the structure is small, and the machine barrel can be conveniently applied to a laboratory.

Description

Technical Field

[0001] The utility model relates to the technical field of extruders, and particularly relates to a twin-screw extrusion experimental machine. Background Art

[0002] The screw extrusion experimental machine is a device applied in laboratories. It can be used for small-batch sample mixing and modification for basic material research, and can also be used for pharmaceutical hot melt extrusion experiments. For example, wet extrusion granulation with APIs as the base material is used for filling capsules; extrusion of APIs with adhesives can be used for transdermal plasters; extrusion of adhesives for medical use, etc.

[0003] The current screw extrusion experimental machine has the disadvantages of large volume and weight, requiring more raw materials, being troublesome to disassemble and assemble, not being conducive to cleaning, resulting in long experiment time and low efficiency, and wasting more raw materials. Summary of the Utility Model

[0004] The utility model aims to solve at least one technical problem existing in the prior art. For this purpose, the utility model provides a twin-screw extrusion experimental machine, which has a small volume, is convenient for disassembly, assembly and cleaning, and saves raw materials through structural improvement.

[0005] A twin-screw extrusion experimental machine according to an embodiment of the utility model includes a machine table, a power assembly, an extrusion assembly and a temperature control module. The power assembly is connected to the upper end face of the machine table; the extrusion assembly includes a split barrel and two screws. The barrel includes an upper barrel plate and a lower barrel plate, and both ends of the upper barrel plate and the lower barrel plate are fixed by quick-release clamps to be assembled into one body. A twin-screw cavity is formed between the upper barrel plate and the lower barrel plate, and the two screws are installed in the twin-screw cavity. The two screws are connected to the power assembly. The input end of the barrel is connected with a hopper, and the output end of the barrel is connected with a die head; the temperature control module includes a temperature control template and a water-cooling pipeline assembly. The temperature control template is connected to the extrusion assembly. The temperature control template is provided with a plurality of temperature control zones, and the water-cooling pipeline assembly has multiple groups of output pipes and return pipes to connect the plurality of temperature control zones.

[0006] The twin-screw extrusion experimental machine according to an embodiment of the utility model has at least the following beneficial effects:

[0007] The barrel is designed as a split structure. By removing the quick-release clamps at both ends, the upper barrel plate and the lower barrel plate of the barrel can be disassembled, which is convenient for cleaning. The structure is small and convenient for application in laboratories, which helps to save raw materials.

[0008] According to some embodiments of the utility model, the die head is provided with a clamp joint, and the clamp joint is connected to the quick-release clamp.

[0009] According to some embodiments of the present utility model, the temperature control template is arranged on the bottom surface of the barrel, and a temperature sensor and a heating pipe are arranged in each temperature control area.

[0010] According to some embodiments of the present utility model, the water cooling pipeline assembly includes a main water inlet pipe and a main water outlet pipe. A plurality of the output pipes are connected to the main water inlet pipe through an electric control valve, and a plurality of the return pipes are connected to the main water outlet pipe.

[0011] According to some embodiments of the present utility model, the temperature control template is connected with a locking assembly. The locking assembly includes a plurality of vertical rods which are spaced along the axial direction of the barrel. The upper ends of the vertical rods lock a pressing block through fasteners, and the pressing block abuts against the upper barrel plate.

[0012] According to some embodiments of the present utility model, the power assembly includes a servo motor and a speed reducer. The servo motor is drivingly connected to the input end of the speed reducer, and the output end of the speed reducer is connected to two of the screws.

[0013] According to some embodiments of the present utility model, the servo motor is located below the speed reducer, and the servo motor and the speed reducer are connected by a synchronous belt.

[0014] According to some embodiments of the present utility model, an electric control box is connected to the machine table. The power assembly is located inside the electric control box. An operation touch screen, a switch and an alarm lamp are arranged on the front side of the electric control box, and a cooling fan is arranged on the rear side of the electric control box.

[0015] According to some embodiments of the present utility model, a machine cover is connected to the machine table. The temperature control module is located inside the machine cover. Two quick connectors are arranged on the outer wall of the machine cover, and the two quick connectors are respectively connected to the main water inlet pipe and the main water outlet pipe.

[0016] According to some embodiments of the present utility model, a heat dissipation cover is further connected to the machine cover. The heat dissipation cover surrounds the extrusion assembly, and a plurality of heat dissipation holes are arranged on the heat dissipation cover.

[0017] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The additional aspects and advantages of the present utility model will become apparent and be readily understood in conjunction with the description of the embodiments with reference to the following drawings, wherein:

[0019] Figure 1 is a schematic structural diagram of a twin-screw extrusion experimental machine according to some embodiments of the present utility model;

[0020] Figure 2 Left view of the twin-screw extrusion experimental machine according to some embodiments of the present utility model;

[0021] Figure 3 Schematic internal structure diagram of the twin-screw extrusion experimental machine according to some embodiments of the present utility model;

[0022] Figure 4 Front view of the internal structure of the twin-screw extrusion experimental machine according to some embodiments of the present utility model;

[0023] Figure 5 Exploded schematic diagram of the barrel and the die head;

[0024] Figure 6 Top view of the lower barrel plate connecting two screws.

[0025] Reference numerals are as follows:

[0026] Machine platform 100, electric control box 110, operation touch screen 111, switch 112, alarm lamp 113, cooling fan 114, machine cover 120, heat dissipation cover 130;

[0027] Power assembly 200, servo motor 210, reduction box 220;

[0028] Extrusion assembly 300, screw 310, upper barrel plate 320, lower barrel plate 330, quick-release clamp 340, hopper 350, die head 360;

[0029] Temperature control module 400, temperature control template 410, vertical rod 411, pressing block 412, water-cooling pipeline assembly 420, output pipe 421, return pipe 422, main water inlet pipe 423, main water outlet pipe 424. Detailed implementation manners

[0030] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present utility model, and should not be construed as a limitation to the present utility model.

[0031] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0032] In the description of the present utility model, unless otherwise clearly defined, terms such as "arrangement", "installation", "connection", etc. shall be understood in a broad sense, and those skilled in the relevant technical field can reasonably determine the specific meanings of the above terms in the present utility model in combination with the specific content of the technical solution.

[0033] Referring to Figures 1 to 6 , an embodiment of the present utility model provides a twin-screw extrusion experimental machine, which includes a machine platform 100, a power assembly 200, an extrusion assembly 300, and a temperature control module 400. The machine platform 100 is usually placed on the factory floor and supported by a plurality of adjustable feet, which is convenient for adjusting the level of the machine platform 100. The power assembly 200 is connected to the upper end surface of the machine platform 100.

[0034] The extrusion assembly 300 adopts a structure that is convenient for disassembly, and includes a split barrel and two screws 310. The barrel includes an upper barrel plate 320 and a lower barrel plate 330. The upper barrel plate 320 and the lower barrel plate 330 can be made of stainless steel to meet the production requirements of medicines and foods. Both ends of the upper barrel plate 320 and the lower barrel plate 330 are fixed by quick-release clamps 340. The quick-release clamp 340 includes two semi-circular clamping rings, and the two clamping rings are fixed by bolts. Semi-circular plates are provided at both ends of the upper barrel plate 320 and the lower barrel plate 330. The upper barrel plate 320 and the lower barrel plate 330 are assembled into one body, and the two semi-circular plates form a clamp joint. The quick-release clamp 340 is used to wrap and lock the clamp joint, thereby fixing the upper barrel plate 320 and the lower barrel plate 330 into one body. A twin-screw cavity is formed between the upper barrel plate 320 and the lower barrel plate 330, and the two screws 310 are installed in the twin-screw cavity. The two screws 310 are connected to the power assembly 200, and the two screws 310 are driven by the power assembly 200 to rotate. By rotating the two screws 310, the material is extruded. A hopper 350 is connected to the input end of the barrel to input the material, and a die head 360 is connected to the output end of the barrel. The die head 360 is used to output the finished product with the target shape. By replacing the die heads 360 of different specifications, finished products of different shapes and sizes can be produced.

[0035] It can be understood that the twin-screw extrusion experimental machine has a temperature control module 400 to control the temperature. The temperature control module 400 includes a temperature control template 410 and a water-cooling pipeline assembly 420. The temperature control template 410 is connected to the extrusion assembly 300 and can detect the temperature, heating, etc. of the extrusion assembly 300. The temperature control template 410 is provided with multiple temperature control zones and can individually control each part of the extrusion assembly 300. The water-cooling pipeline assembly 420 has multiple groups of output pipes 421 and return pipes 422 to correspondingly connect to multiple temperature control zones, and cools down the extrusion assembly 300 by inputting cooling water to accurately control the temperature.

[0036] During the use of the twin-screw extrusion experimental machine, raw materials are placed in the hopper 350. The two screws 310 are driven to rotate by the power assembly 200. Through the rotation of the two screws 310, the raw materials are extruded and mixed, and finally extruded from the die head 360. It can be applied in laboratories, such as for small-batch sample mixing and modification for basic material research, and can also be used for pharmaceutical hot melt extrusion experiments, such as wet extrusion granulation with APIs as the base material for filling capsules; the extrusion of APIs with adhesives can be used for transdermal plasters; the extrusion experiment of adhesives for medical use, etc. It can also be applied to the extrusion molding of products such as erythromycin, cyclosporine, carbamazepine, selumetinib, and cyclodextrin. The barrel is designed as a split structure. By removing the quick-release clamps 340 at both ends, the upper barrel plate 320 and the lower barrel plate 330 of the barrel can be disassembled, and the two screws 310 can be taken out, which is convenient for cleaning. The structure is small and compact, which is convenient for application in laboratories and helps to save raw materials.

[0037] Refer to Figure 5 , in some embodiments of the present invention, the die head 360 is also provided with a clamp joint. The quick-release clamp 340 is assembled to the clamp joint of the die head 360 and the clamp joint of the barrel at the same time to realize the connection and fixation of the die head 360 and the barrel. Moreover, the clamp joint is provided with an inclined surface. When the quick-release clamp 340 is locked, the inclined surface is used to push the die head 360 and the barrel to fit tightly axially, improving the sealing performance.

[0038] It can be understood that, for the convenience of disassembly, in some embodiments of the present invention, the temperature control template 410 is arranged on the bottom surface of the barrel. After removing the 2 quick-release clamps 340, the upper barrel plate 320 can be taken away, which is convenient for cleaning the screw 310 and the twin-screw cavity, with convenient operation and reduced time consumption. Each temperature control zone of the temperature control template 410 is provided with a temperature sensor and a heating tube, which can accurately detect the temperature in real time. The heating tube can be used to heat the barrel to accurately control the temperature.

[0039] Refer to Figure 3 and Figure 4 , in some embodiments of the present invention, the water cooling pipeline assembly 420 includes a main water inlet pipe 423 and a main water outlet pipe 424. Multiple output pipes 421 are connected to the main water inlet pipe 423 through electric control valves, and multiple return pipes 422 are connected to the main water outlet pipe 424. The controller of the twin-screw extrusion experimental machine controls the water inlet and water volume through the electric control valves to accurately control the cooling effect. A machine cover 120 is connected to the machine table 100, and the temperature control module 400 is arranged inside the machine cover 120. Two quick connectors are arranged on the outer wall of the machine cover 120, and the two quick connectors are respectively connected to the main water inlet pipe 423 and the main water outlet pipe 424, which is convenient for connecting the external cooling water circuit.

[0040] Refer to Figure 1In some embodiments of the utility model, a heat dissipation cover 130 is also connected to the hood 120, and the heat dissipation cover 130 surrounds the extrusion assembly 300. A plurality of through heat dissipation holes are arranged on the outer wall of the heat dissipation cover 130 to help the extrusion assembly 300. The heat dissipation cover 130 plays an isolating role to prevent people from contacting the high-temperature extrusion assembly 300, and also plays a protective role to prevent the extrusion assembly 300 from being collided, thereby improving the stability of use.

[0041] Reference Figure 3 In some embodiments of the utility model, the temperature control template 410 is fixed to the barrel by a locking assembly. The locking assembly includes a plurality of vertical rods 411. The plurality of vertical rods 411 are spaced apart along the axial direction of the barrel. A slot is provided at the lower end of the vertical rod 411 and the temperature control template 410 is stuck in the slot. The upper end of the vertical rod 411 is locked with a pressure block 412 by a fastener. The pressure block 412 abuts against the upper barrel plate 320. The pressure block 412 is a long strip structure and is arranged along the axial direction of the barrel. Of course, multiple pressure blocks can also be used, and each block corresponds to a vertical rod 411. The locking assembly includes two groups of vertical rods 411, which are distributed on both sides of the barrel to achieve a fixed connection between the barrel and the temperature control template 410, and the force is balanced and the stability is higher.

[0042] Reference Figure 3 and Figure 4 In some embodiments of the utility model, the power assembly 200 includes a servo motor 210 and a reduction box 220. The servo motor 210 is connected to the input end of the reduction box 220 by transmission, and the output end of the reduction box 220 is connected to two screws 310. The high precision and high response speed of the servo motor 210 are used to improve the running precision and response speed of the twin-screw extruder test machine. The reduction box 220 can use a gear reducer to reduce the speed and increase the torque, which is helpful for extrusion. Among them, in order to save space and reduce the volume of the twin-screw extruder test machine, the servo motor 210 is arranged below the reduction box 220. The servo motor 210 and the reduction box 220 are connected by a synchronous belt. Of course, the servo motor 210 and the reduction box 220 can also be driven by gears. A mounting frame is arranged on the machine 100, the reduction box 220 is installed at the upper end of the mounting frame, and the servo motor 210 is installed inside the mounting frame. The structure is stable and reliable.

[0043] Reference Figure 1 Only Figure 3, in some embodiments of the present utility model, an electric control box 110 is connected to the machine platform 100. The power assembly 200 is located inside the electric control box 110. An operation touch screen 111, a switch 112, and an alarm lamp 113 are arranged on the front side of the electric control box 110. The operation touch screen 111, the switch 112, and the alarm lamp 113 are all electrically connected to the controller. The operation parameters are input by using the operation touch screen 111, and the operation data is displayed at the same time. The switch 112 is used to turn on and off the machine, and the alarm lamp 113 alarms in case of abnormality to remind the worker to handle it. A cooling fan 114 is arranged on the rear side of the electric control box 110 to help with heat dissipation.

[0044] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Various changes can be made without departing from the gist of the present utility model within the scope of knowledge possessed by those of ordinary skill in the art to which it pertains.

Claims

1. Twin-screw extruder test machine, characterized in that, include: Machine; A power assembly connected to the upper end surface of the machine platform; An extrusion assembly, comprising a split barrel and two screws, the barrel comprising an upper barrel plate and a lower barrel plate, both ends of the upper barrel plate and the lower barrel plate are fixed by quick-release clamps to be assembled as a whole, a twin-screw cavity is formed between the upper barrel plate and the lower barrel plate, the two screws are installed in the twin-screw cavity, the two screws are connected to a power assembly, the input end of the barrel is connected to a hopper, and the output end of the barrel is connected to a die head; The temperature control module comprises a temperature control template and a water cooling pipeline assembly. The temperature control template is connected to the extrusion assembly. The temperature control template is provided with a plurality of temperature control zones. The water cooling pipeline assembly has a plurality of groups of output pipes and return pipes to connect the plurality of temperature control zones.

2. The twin-screw extruder testing machine according to claim 1, characterized in that: The die head is provided with a clamp joint, and the clamp joint is connected to the quick-release clamp.

3. The twin-screw extruder testing machine according to claim 1, characterized in that: The temperature control template is arranged on the bottom surface of the barrel, and a temperature sensor and a heating tube are arranged in each temperature control zone.

4. The twin-screw extruder testing machine according to claim 3, characterized in that: The water cooling pipeline assembly includes a main water inlet pipe and a main water outlet pipe, a plurality of the output pipes are connected to the main water inlet pipe via an electric control valve, and a plurality of the return pipes are connected to the main water outlet pipe.

5. The twin-screw extruder testing machine according to claim 3, characterized in that: The temperature control template is connected with a locking assembly, which includes a plurality of vertical rods, which are spaced apart along the axial direction of the barrel. The upper ends of the vertical rods are locked with a pressure block through fasteners, and the pressure block abuts against the upper barrel plate.

6. The twin-screw extruder testing machine according to claim 1, characterized in that: The power assembly includes a servo motor and a reduction box. The servo motor is transmission-connected to the input end of the reduction box, and the output end of the reduction box is connected to the two screw rods.

7. The twin-screw extruder testing machine according to claim 6, characterized in that: The servo motor is located below the reduction box, and the servo motor is connected to the reduction box through a synchronous belt.

8. The twin-screw extruder testing machine according to claim 1, characterized in that: An electric control box is connected to the machine platform, the power assembly is located inside the electric control box, an operation touch screen, a switch and an alarm light are arranged on the front side of the electric control box, and a cooling fan is arranged on the rear side of the electric control box.

9. The twin-screw extruder testing machine according to claim 4, characterized in that: The machine platform is connected with a hood, the temperature control module is located inside the hood, and the outer wall of the hood is provided with two quick connectors, which are respectively connected to a main water inlet pipe and a main water outlet pipe.

10. The twin-screw extruder testing machine according to claim 9, characterized in that: The hood is also connected to a heat dissipation hood, which surrounds the extrusion assembly and is provided with a plurality of heat dissipation holes.

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