CN218366399U - Miniature double-screw compounding extrusion experiment machine - Google Patents

Abstract

The utility model relates to a miniature twin-screw compounding extrusion experiment machine, the transmission case of being connected including drive arrangement and with drive arrangement, the inside of transmission case is connected with two screws of A screw rod and B screw rod through multistage transmission subassembly, drive arrangement is direct current servo motor, the diameter of A screw rod and B screw rod is 12-16mm, and the centre-to-centre spacing of A screw rod and B screw rod is 11-13mm. The utility model discloses in, drive arrangement adopts servo motor, can realize that the laboratory uses, and diameter and centre-to-centre spacing of A screw rod and B screw rod all are less than the trade minimum, can realize that the accuracy of trace experimental material joins in marriage and joins in marriage, obtains accurate experimental data. The miniature double-screw compounding and extruding tester can be used for material mixing experiment extrusion, can also realize production extrusion of products, is widely applied to the fields of chemical formula, medicine hot melt extrusion, high polymer compounding modification, new energy storage battery homogenate, fuel boosting agent and the like, and can meet accurate material experiment data and reasonable product production.

Description

Miniature twin-screw compounding extrusion experiment machine

Technical Field

The utility model relates to an extruder technical field especially relates to a miniature twin-screw compounding extrusion experiment machine.

Background

The extruder is generally used for extruding plastic articles in a heating mode, can recycle waste materials, and can be matched with auxiliary equipment to produce products. The double-screw extruder sold in the market at present is connected with a three-phase power supply, the volume is large, the size is between 2 meters and 15 meters, and the produced materials are various in varieties. During production, the noise is relatively large, and the method is suitable for factory production.

In some special material industries, in order to perform experiments or verification on material performance, formula and the like, an extruder is required to be used for producing materials, such as pharmaceutical and pharmaceutical products, material mixing, fuel boosting agents, organic substances and other materials, during experiments, the used materials are expensive and have tens of thousands of yuan per kilogram, too many materials are wasted due to single discharging, discharging is too little, and the discharging effect cannot be obtained, so that the conventional small-sized extruder does not have the capability of being mixed and extruded in small dosage.

The concrete expression is as follows: the material volume of the screw element of the traditional small-sized double-screw compounding extruder is large, and a small amount of material cannot fill the space, so that trace material extrusion cannot be realized. The double-screw extruder with smaller center distance has smaller screw groove depth, but has processing difficulty on the particle size of the plastic raw material, and is difficult to feed and easy to clamp.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a miniature twin-screw compounding extrusion experiment machine to solve the problem that meets in the above-mentioned background art.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

a miniature double-screw compounding extrusion experiment machine comprises a driving device and a transmission case connected with the driving device, wherein the transmission case is internally connected with a screw A and a screw B through a multi-stage transmission assembly, the rotation direction of the screw A is the same as that of the screw B, the rotation speed of the screw A is the same as that of the screw B, the driving device is a direct-current servo motor, the diameters of the screw A and the screw B are both 12-16mm, and the center distance between the screw A and the screw B is 11-13mm.

In a preferable embodiment, the diameters of the screws A and B are both 14mm, and the center distance between the screws A and B is 12mm.

In the scheme, the automatic feeding device further comprises a plurality of mutually connected machine barrels, the machine barrel at the foremost end is connected with the output end of the transmission case, the top of the machine barrel is provided with a feeding hopper, and the discharge end of the machine barrel at the rearmost end is connected with a discharge die.

In the scheme, the outer side of the machine barrel is connected with a heating device and a cooling device.

In a certain embodiment, the transmission case includes the box and with box fixed connection's case lid, the internally mounted of box has one-level transmission subassembly, second grade transmission subassembly, tertiary transmission subassembly, the input of one-level transmission subassembly is connected with drive arrangement's output, the output and the second grade transmission subassembly fixed connection of one-level transmission subassembly, output one side and A screw rod fixed connection of second grade transmission subassembly, the output opposite side and the tertiary transmission subassembly of second grade transmission subassembly are connected, the output and the B screw rod fixed connection of tertiary transmission subassembly.

Furthermore, in the above scheme, the outer wall of the screw a is provided with a first bearing outer ring rotationally connected with the transmission case through a rolling body, and the outer wall of the screw B is provided with a second bearing outer ring rotationally connected with the transmission case through a rolling body.

Still further, in the above scheme, the primary transmission assembly, the secondary transmission assembly and the tertiary transmission assembly are all gear shaft transmission assemblies, and the primary transmission assembly, the secondary transmission assembly and the tertiary transmission assembly are respectively installed in the transmission case through bearings.

In addition, as a preferable scheme, the screw ridges of the screw A and the screw ridges of the screw B are installed in a staggered mode.

Compared with the prior art, the beneficial effects of the utility model are that: the driving device adopts a servo motor, the laboratory use can be realized, the diameter and the center distance of the A screw and the B screw are both smaller than the industry minimum value, the material particles with smaller particle size can be produced, the miniature double-screw compounding and extruding tester can be used for mixing materials and can also be extruded for production, the application range is wide, and the requirement of laboratory materials can be met.

Drawings

The disclosure of the present invention is explained with reference to the drawings. It is to be understood that the drawings are designed solely for the purposes of illustration and not as a definition of the limits of the invention. In the drawings, like reference numerals are used to refer to like parts. Wherein:

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the internal structure of the transmission case of the present invention;

FIG. 3 isbase:Sub>A schematic view of the cross-sectional structure A-A of FIG. 2;

FIG. 4 is an enlarged view of portion B of FIG. 3;

FIG. 5 is a schematic view of the three-dimensional structure of the middle transmission case of the present invention with the case cover removed;

fig. 6 is a schematic structural view of a multi-stage transmission assembly in a transmission case of the present invention.

Reference numbers in the figures: 1-a drive device; 2-a transmission case; 21-a box body; 211-front end cap; 212-sealing ring; 22-box cover; 221-a thrust bearing seat; 222-rear cover; 223-a support plate; 23-a primary transmission assembly; 231-first drive gear shaft; 232-a first driven gear shaft; 24-a secondary drive assembly; 241-a second driving gear shaft; 242 — a second driven gear shaft; 25-a tertiary drive assembly; 251-a third drive gear shaft; 252-a third driven gear shaft; 253-a bearing; a 26-A screw; 261-a first bearing outer race; 27-B screw; 271-a second bearing outer ring; 3-machine barrel; 4-a feed hopper; and 5, discharging the die.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic drawings, which illustrate the basic structure of the invention in a schematic manner and therefore show only the components that are relevant to the invention.

According to the technical scheme of the utility model, under the essential spirit of the utility model, general technical personnel in this field can propose the multiple structural style and the implementation that can replace each other. Therefore, the following detailed description and the accompanying drawings are only exemplary of the technical aspects of the present invention, and should not be considered as limiting or restricting the technical aspects of the present invention in its entirety or as limiting or restricting the technical aspects of the present invention.

The technical solution of the present invention is further described in detail with reference to the accompanying drawings and embodiments.

As shown in FIGS. 1 to 6, a miniature twin-screw compounding and extruding tester comprises a driving device 1 and a transmission case 2 connected with the driving device 1, wherein an A screw 26 and a B screw 27 are connected with the inside of the transmission case 2 through a multi-stage transmission assembly, the rotating direction of the A screw 26 is the same as that of the B screw 27, and the rotating speed of the A screw is the same as that of the B screw 27. The multi-stage transmission assembly in the transmission case 2 is driven to rotate by the driving device 1, and finally the screw rod A26 and the screw rod B27 are driven to rotate, so that the materials are continuously output.

In the prior art, the two screws rotate in opposite directions, namely inward rotation or outward rotation, one screw rotates leftwards, the other screw rotates rightwards, and the arrangement is that when the diameter of the screw is 14mm, for example, the center distance of the screws cannot be smaller than 14 mm. In the present invention, the two screws rotate in the same direction! Two screw rods can be staggered with each other according to the threaded position when being installed, the stirring to the material will be tighter, and the thread parts of the two screw rods can be partially overlapped together after being installed, so that the distance between the two screw rods is shortened, the material can be better extruded, and the material can be effectively mixed.

In practice, a miniature twin-screw compounding and extruding tester also comprises a plurality of mutually connected machine barrels 3, and an A screw 26 and a B screw 27 are mutually parallel and are arranged in all the machine barrels 3. The machine barrel 3 at the foremost end is movably connected with the output end of the transmission case 2, the top of the machine barrel 3 is provided with a feed hopper 4, and the discharge end of the machine barrel 3 at the rearmost end is connected with a discharge mold 5. Feeder hopper 4 is used for adding the material, carries out the compounding, and barrel 3 is used for the hot melt material, provides a good heat preservation environment for the material, and final fused material passes through ejection of compact mould 5 output. The rear part of the discharging mould 5 can be provided with a mould head for distributing materials, so that the extrusion of materials with different specifications and shapes can be realized.

The most front machine barrel 3 is movably connected with the output end of the transmission case 2, can be connected in a plug-in mounting mode, is sealed at the joint, and is matched with different types of equipment according to experiment requirements.

As a preferable scheme, a heating device and a cooling device are connected to the outer side of the cylinder 3. Heating means are mounted on the outer wall of each barrel 3 and are heated by the heating plate. The cooling device is arranged at the bottom of the machine barrel 3, and cold air is conveyed by a fan to adjust the problems of the machine barrel 3. The cooling device can also adopt water cooling commonly used in the extruder industry, and is only large in water cooling occupied space and small in air cooling occupied space, so that the cooling device is suitable for being used in a laboratory.

The cooling device can also adopt a semiconductor refrigerating sheet, the working principle of the semiconductor refrigerating sheet is based on the Peltier principle, namely when a circuit consisting of two different conductors A and B is electrified with direct current, the semiconductor refrigerating sheet can release certain other heat besides joule heat at a joint, the other joint absorbs the heat, the phenomenon caused by the Peltier effect is reversible, and when the current direction is changed, the joints which release and absorb the heat are changed. The semiconductor refrigerating sheet has small volume, can work continuously, has very high heat dissipation effect, and is convenient to adjust and control due to the adoption of electric control operation.

In actual production, the size of the screw element needs to be reduced to reduce the material volume and adapt to the mixing of materials with small particle size. The volume is square to the radius of the screw element, so reducing the outer diameter of the screw element is an effective measure to reduce the volume of the material. Because flat key strength such as shearing force, conveying thrust force and the like is restricted when materials are extruded, and splines are required to be arranged in the screw, screw elements have the characteristic of thin wall, which is a difficult point in design and manufacture; meanwhile, the diameter size of the conventional bearing also greatly limits the reduction of the center distance between the two screws.

When the device is implemented, the driving device 1 is a direct-current servo motor, can adapt to a civil power supply, has low noise in the operation process, and is suitable for laboratories. The diameters of the screw rod A26 and the screw rod B27 are 12-16mm, and the center distance between the screw rod A26 and the screw rod B27 is 11-13mm. The designed A screw 26 and the B screw 27 are small in size and small in middle distance, when materials are output, the output material is high in precision, the diameter of the materials is small, plastic particles with the diameter of 2.5-3 mm can be output, and feeding is facilitated without blocking.

Preferably, the diameters of the A screw 26 and the B screw 27 are both 14mm, and the center distance between the A screw 26 and the B screw 27 is 12mm. The diameter and the center distance of the screw selected by the optimal scheme just meet the productivity requirements of micro continuous compounding and extrusion of 50g/h and continuous production of 2000g/h, and can also meet the thin-wall strength requirement of the minimum wall thickness of a screw element.

In the design process, when the diameter of the screw rod is 14mm, the internal spline at the joint of the end part of the screw rod becomes the maximum external diameter, the difference value of the internal spline compared with the diameter of the screw rod is less than 1mm, the specification of the spline is difficult to reduce downwards according to the diameter of the screw rod is 14mm, the bottom diameter of a screw rod element is difficult to increase, and therefore the diameter of the screw rod reaches the minimum bottom limit of the industry. The two screws have strength only by the screw ridges on the screws, and the screw ridges are continuous, so that enough strength can be kept. If the screw element diameter (14 mm) continues to decrease and the volume is maintained as much as it is to decrease the root diameter, there is no material left at the splines to connect to other components to transfer material. In addition, when the screw rod diameter adopted 14mm, the thread groove degree of depth between the spiral shell arris was 2mm, and the aggregate diameter is about 2.5mm, just is difficult to get into the thread groove, and then does not block up, prevents blockking up, and the small diameter material granule is steadily carried, makes things convenient for the feeding can not the card machine.

In one embodiment, the transmission case 2 includes a case body 21 and a case cover 22 fixedly connected to the case body 21, a primary transmission assembly 23, a secondary transmission assembly 24, and a tertiary transmission assembly 25 are installed inside the case body 21, an input end of the primary transmission assembly 23 is connected to an output end of the driving device 1, an output end of the primary transmission assembly 23 is fixedly connected to the secondary transmission assembly 24, one side of an output end of the secondary transmission assembly 24 is fixedly connected to the a screw 26, the other side of the output end of the secondary transmission assembly 24 is connected to the tertiary transmission assembly 25, and an output end of the tertiary transmission assembly 25 is fixedly connected to the B screw 27.

The first-stage transmission assembly 23 is driven by the driving device 1 to rotate, so that the second-stage transmission assembly 24 is driven to synchronously rotate together, the second-stage transmission assembly 24 drives the A screw 26 to synchronously rotate, and the third-stage transmission assembly 25 arranged on the outer side drives the B screw 27 to synchronously rotate together, wherein the rotation direction of the A screw 26 is the same as that of the B screw 27, the rotation speed of the A screw is the same as that of the B screw 27, so that materials can be effectively mixed, melted and conveyed, and the distance between the two screws can be shortened.

In order to reduce the center distance between the A screw 26 and the B screw 27 and realize the low-dosage mixing extrusion, a first bearing outer ring 261 which is rotationally connected with the transmission case 2 is arranged on the outer wall of the A screw 26 through rolling bodies, and a second bearing outer ring 271 which is rotationally connected with the transmission case 2 is arranged on the outer wall of the B screw 27 through rolling bodies. Compared with the existing product, the bearing inner ring is not arranged, the outer walls of the screw rod A26 and the screw rod B27 are directly used as the bearing inner ring, so that the two screw rods are closer to each other, and the original strength can be maintained.

The primary transmission assembly 23, the secondary transmission assembly 24 and the tertiary transmission assembly 25 are all gear shaft transmission assemblies, and the primary transmission assembly 23, the secondary transmission assembly 24 and the tertiary transmission assembly 25 are respectively installed in the transmission case 2 through bearings 253. Wherein, a front end cover 211 is installed on one side of the transmission case 2, and the front end cover 211 can be used as a mounting seat of the driving device 1.

An output shaft of the driving device 1 penetrates through the front end cover 211 to be connected with a first driving gear 231 in the primary transmission assembly 23, under the driving of the first driving gear shaft 231, a first driven gear shaft 232 meshed with the first driving gear shaft is rotated, the tail end of the first driven gear shaft 232 is connected with a second driving gear shaft 241, the tail end of the second driving gear shaft 241 is coaxially and fixedly connected with the screw rod A26, the second driving gear shaft 241 is meshed with two driven gear shafts 242, the tail ends of the two driven gear shafts 242 are fixedly connected with a third driving gear shaft 251 in the tertiary transmission assembly 25, the third driving gear shaft 251 is meshed with a third driven gear shaft 252, and the tail end of the third driven gear shaft 252 is coaxially and fixedly connected with the screw rod B27.

The other side of the transmission case 2 is provided with a rear cover 222, and the A screw 26 and the B screw 27 respectively penetrate through the rear cover 222 and extend into the barrel 3. A support plate 223 is also mounted on the inside of the rear cover 222 to accommodate normal rotational movement of the two screws by mounting the outer race of the bearing and the rollers. Sealing rings 212 are arranged at the joints of the screw rods A26 and B27 and the rear sealing cover 222, so that the leakage of gear oil and the entry of external impurities into the transmission case 2 are avoided.

The utility model discloses in, drive arrangement 1 adopts servo motor, can use 220V civilian power supply, and experiment such as convenient laboratory or verification place use. The diameter and the center distance of the screw A26 and the screw B27 are both smaller than the minimum value of the industry, so that the small-dose precise compounding and extrusion can be realized, the miniature double-screw compounding and extrusion tester can be used for formula mixing and can also be used for extrusion production, the application range is wide, and the requirement of laboratory materials can be met.

In addition, this testing machine can adopt portable base, installs the gyro wheel additional in the bottom promptly, and the convenient operation requirement that often changes the experimental position. The miniature double-screw compounding and extruding tester can be used for material mixing experiment extrusion, can also realize production extrusion of products, is widely applied to the fields of chemical formula, medicine hot melt extrusion, high polymer compounding modification, new energy storage battery homogenate, fuel boosting agent and the like, and can meet accurate material experiment data and reasonable product production.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. These elements not disclosed are all known to those skilled in the art.

The above-mentioned embodiments further explain in detail the objects, technical solutions and advantages of the present invention, and it should be understood that the above-mentioned embodiments are only the embodiments of the present invention, and are not intended to limit the scope of the present invention, any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the scope of the present invention.

Claims (8)

1. A miniature twin-screw compounding extrusion tester, comprising a driving device (1) and a transmission case (2) connected with the driving device (1), the inside of the transmission case (2) is connected with an A screw (26) and a B screw (27) through a multi-stage transmission component, characterized in that: the rotating direction of the screw rod A (26) is the same as that of the screw rod B (27) and the rotating speed of the screw rod A is the same as that of the screw rod B (27), the driving device (1) is a direct-current servo motor, the diameters of the screw rod A (26) and the screw rod B (27) are both 12-16mm, and the center distance between the screw rod A (26) and the screw rod B (27) is 11-13mm.

2. A miniature twin screw compounding extrusion tester as claimed in claim 1 wherein: the diameters of the screw A (26) and the screw B (27) are both 14mm, and the center distance between the screw A (26) and the screw B (27) is 12mm.

3. A twin screw compounding extrusion test machine of claim 1 in which: still include barrel (3) of a plurality of interconnect, the output end face of barrel (3) and transmission case (2) at foremost is connected, just feeder hopper (4) are installed to the top of barrel (3), and barrel (3) discharge end at rearmost is connected with ejection of compact mould (5).

4. A miniature twin screw compounding extrusion tester as claimed in claim 3 characterised by: the machine barrel (3) is connected with a heating device and a cooling device.

5. A miniature twin screw compounding extrusion tester as claimed in claim 1 wherein: transmission case (2) include box (21) and case lid (22) with box (21) fixed connection, the internally mounted of box (21) has one-level transmission subassembly (23), secondary drive subassembly (24), tertiary transmission subassembly (25), the input and the output of drive arrangement (1) of one-level transmission subassembly (23) are connected, the output and secondary drive subassembly (24) fixed connection of one-level transmission subassembly (23), output one side and A screw rod (26) fixed connection of secondary drive subassembly (24), the output opposite side and the tertiary drive subassembly (25) of secondary drive subassembly (24) are connected, the output and B screw rod (27) fixed connection of tertiary drive subassembly (25).

6. A twin screw compounding extrusion test machine of claim 5 in which: the outer wall of the screw A (26) is provided with a first bearing outer ring (261) which is rotatably connected with the transmission case (2) through a rolling body, and the outer wall of the screw B (27) is provided with a second bearing outer ring (271) which is rotatably connected with the transmission case (2) through a rolling body.

7. A miniature twin screw compounding extrusion tester as claimed in claim 5 characterised by: the transmission device is characterized in that the primary transmission assembly (23), the secondary transmission assembly (24) and the tertiary transmission assembly (25) are gear shaft transmission assemblies, and the primary transmission assembly (23), the secondary transmission assembly (24) and the tertiary transmission assembly (25) are respectively installed in the transmission case (2) through bearings (253).

8. A twin screw compounding extrusion test machine of claim 1 in which: the screw ridges of the screw rods A (26) and the screw ridges of the screw rods B (27) are installed in a staggered mode.

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