Energy-saving and efficient three-cone screw extrusion tablet press

Abstract

The utility model discloses an energy-saving efficient three-cone screw extrusion tablet press, which comprises a base, and a screw transmission gear box assembly, a stock bin assembly, a compression roller assembly and a compression roller transmission assembly which are arranged on the base, the screw transmission gear box assembly comprises a screw stock bin, a driving motor, a gear box and a screw arranged in the screw stock bin, the screw comprises a driving screw, a left screw and a right screw, the left screw and the right screw are arranged on the two sides of the driving screw respectively, and the left screw and the right screw are in driving connection with the driving screw through a gearbox and can be driven by the driving screw to squeeze and convey materials in the screw bin forwards. The stock bin assembly is arranged above the screw stock bin; the compression roller assembly is positioned at the front end of the screw transmission gear box assembly and is used for carrying out compression roller conveying on the extruded materials; and the compression roller transmission assembly is in driving connection with the compression roller assembly. According to the utility model, materials can be fully stirred, compressed and mixed, and the mixing and feeding efficiency and quality are effectively improved.

Description

Technical Field

[0001] This utility model specifically relates to a chilled water refrigeration unit device for a liquid-cooled cabinet. Background Technology

[0002] Rubber and plastic products are widely used in the automotive, construction, and electronics industries, and market demand for them continues to grow, leading to increasingly higher requirements for the output, quality, and performance of rubber and plastic sheets. Traditional twin-screw extruders experience quality and efficiency issues in mixing, feeding, and compression as extrusion speed and feed rate increase, making it difficult to meet the demands of large-scale, high-quality production.

[0003] As production requirements increase, twin-screw extrusion tablet presses are prone to problems such as uneven mixing and incomplete agitation of rubber and plastic raw materials. For materials with high pigment or filler content, or those that are heat-sensitive or easily degradable, twin-screw extrusion tablet presses may not be able to handle them effectively. Summary of the Invention

[0004] Purpose of the invention: In view of the defects and technical problems existing in the background technology, this utility model provides an energy-saving and efficient three-cone screw extrusion tablet press.

[0005] Technical Solution: To achieve the above-mentioned objectives, this utility model adopts the following technical solution: an energy-saving and efficient three-cone screw extrusion tablet press, comprising a base, and a screw drive gearbox assembly, a hopper assembly, a pressure roller assembly, and a pressure roller drive assembly mounted on the base, wherein:

[0006] The screw drive gearbox assembly includes a screw hopper, a drive motor, a gearbox, and a screw housed within the screw hopper. The screw includes a drive screw and a left screw and a right screw located on either side of the drive screw. The drive motor is connected to the drive screw, and the left and right screws are driven by the gearbox and can compress and convey the material in the screw hopper forward under the drive of the drive screw. The hopper assembly is located above the screw hopper.

[0007] The pressure roller assembly is located at the front end of the screw drive gearbox assembly and is used to convey the extruded material through the pressure roller; the pressure roller drive assembly is driven to connect with the pressure roller assembly.

[0008] Preferably, the active screw has a right-hand thread, and the left and right screws have left-hand threads.

[0009] Preferably, all screws are tapered screws.

[0010] Preferably, the gearbox includes a gearbox body, a front bearing assembly and a rear bearing assembly respectively fitted on the tail ends of all the screws, and a gear disposed on all the screws and located between the front bearing assembly and the rear bearing assembly;

[0011] The gears include an intermediate gear located at the tail end of the drive screw, a left gear and a right gear located on the left and right screws respectively;

[0012] The rear bearing assembly includes an intermediate bearing and a rear bearing that are sequentially sleeved on the screw along the axial direction. The tail end of the screw is also provided with a rear spacer, and a rear seal is provided between the rear spacer and the gearbox.

[0013] The front bearing assembly includes a front bearing fitted on a screw, a middle spacer and a front spacer provided on both sides of the front bearing, and a front bearing seat cover that seals the front bearing.

[0014] Preferably, the intermediate bearing is further provided with a front nut, and the tail end of the screw is further provided with a rear nut.

[0015] Preferably, the pressure roller assembly includes a pressure roller seat, an upper pressure roller fixed on the pressure roller seat, and a lower pressure roller disposed below the upper pressure roller.

[0016] Preferably, the pressure roller seat is provided with an ear loop hole, and a swing pin that can swing is provided in the ear loop hole. The lower pressure roller can swing up and down through the swing pin. The lower pressure roller is driven to swing up and down by an opening and closing hydraulic cylinder. (The lower pressure roller seat 4 is floatingly positioned in the ear loop of the pressure roller seat 15 by the swing pin 14. On the other side, the piston rod 17 fixed on the upper pressure roller seat 5 moves the opening and closing hydraulic cylinder 16, causing the lower pressure roller seat 4 and the lower pressure roller 1 to swing, thereby adjusting the gap between the upper and lower pressure rollers, i.e., the thickness of the rubber plastic sheet.)

[0017] Preferably, the hopper assembly includes a feeding hopper located above the screw hopper and a duckbill guide seat located at the front end of the screw.

[0018] Preferably, the pressure roller drive assembly includes a permanent magnet variable frequency motor and a pressure roller reduction gearbox fixed on the base, as well as an upper pressure roller drive gear and a lower pressure roller drive gear, which are respectively connected to the upper pressure roller and the lower pressure roller.

[0019] Preferably, each screw has a central elongated hole at its center, and can be connected to a heat source through a rotary joint located at its tail end.

[0020] Beneficial effects: Compared with the prior art, the present invention has the following advantages:

[0021] This invention relates to a three-cone screw extruder tablet press. By increasing the number of screws and optimizing their structure, it enables more thorough mixing, compression, and blending of materials, effectively solving the mixing and feeding problems inherent in twin-screw extruder tablet presses and improving tablet quality. Because the three screws work in tandem, more material can be conveyed and processed in the same amount of time, significantly increasing output compared to two-cone screw extruder tablet presses. This three-cone screw extruder also offers better dispersion, venting performance, and a shorter material residence time, making it more suitable for processing these special materials and thus expanding the application range of extruder tablet presses. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the energy-saving and efficient three-cone screw extruder tablet press described in this utility model.

[0023] Figure 2 for Figure 1 The left view.

[0024] Figure 3 for Figure 2 Cross-sectional view along the BB direction.

[0025] Among them, 1. lower pressure roller, 2. upper pressure roller, 3. base, 4. lower pressure roller seat, 5. upper pressure roller seat, 6. lower pressure roller drive gear, 7. upper pressure roller drive gear, 8. pressure roller reduction gearbox, 9. rotary joint, 10. reduction gearbox, 11. transmission box, 12. feed hopper, 13. screw hopper, 14. swing pin, 15. pressure roller seat, 16. opening and closing hydraulic cylinder, 17. piston rod, 18. permanent magnet motor, 19. flat key, 20. intermediate gear, 21. right... 21. Gear, 22. Intermediate spacer, 23. Front spacer, 24. Front bearing housing cover, 25. Permanent magnet variable frequency motor, 26. Right screw, 27. Intermediate screw, 28. Left screw, 29. Duckbill guide seat, 30. Material stop plate, 31. Front seal, 32. Front bearing, 33. Left gear, 34. Front nut, 35. Intermediate bearing, 36. Rear bearing, 37. Rear spacer, 38. Rear seal, 39. Rear nut, 35. Ball bearing (radial bearing), 36. Axial bearing. Detailed Implementation

[0026] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. After reading the present invention, any modifications of the present invention in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.

[0027] like Figure 1As shown, the energy-saving and efficient three-cone screw extrusion tablet press of this utility model comprises a base, a screw drive gearbox assembly, a screw hopper assembly, a pressure roller assembly, a pressure roller drive assembly, and a lower pressure roller hydraulic opening and closing assembly.

[0028] The screw drive gearbox assembly includes a screw hopper, a drive motor, a gearbox, and a screw housed within the screw hopper. The screw includes a drive screw and left and right screws located on either side of the drive screw. The drive motor is connected to the drive screw, and the left and right screws are driven by the gearbox. The hopper assembly is positioned above the screw hopper. In this patent, the three screws are horizontally arranged and meshing tapered screws. The drive screw has a right-hand thread, while the left and right screws have left-hand threads. When the drive screw is driven by force, it rotates the left and right screws, thereby extruding and conveying the material in the screw hopper forward. This increases the discharge width, and the meshing of the three tapered screws improves the efficiency of pre-discharge feeding.

[0029] The pressure roller assembly is located at the front end of the screw drive gearbox assembly and is used to convey the extruded material through the pressure roller; the pressure roller drive assembly is driven to connect with the pressure roller assembly.

[0030] The gearbox includes a gearbox body, a front bearing assembly and a rear bearing assembly respectively fitted on the tail ends of all screws, and a gear located on all screws and between the front bearing assembly and the rear bearing assembly. Specifically, the gearbox includes: a screw drive housing, a reduction gearbox, a permanent magnet variable frequency motor (1), a flat key, an intermediate gear, a left gear, a middle spacer, a front spacer, a front bearing cover, a right screw, an intermediate screw, a left screw, a duckbill guide seat, a baffle plate, a front seal, a front bearing, a right gear, a front nut, an intermediate bearing, a rear bearing, a rear spacer, a rear seal, and a rear nut.

[0031] The screw drive gearbox component, the reduction gearbox, and the permanent magnet variable frequency motor (1) are mounted on the base.

[0032] A left gear and a right gear are respectively provided on the left and right screws on both sides of the intermediate gear at the tail end of the driving screw. The rotational extrusion propulsion power of the intermediate screw is transmitted to the intermediate screw by the permanent magnet variable frequency motor (1) after the torque is increased by the reduction gearbox. The intermediate gear fixed on the intermediate screw drives the left and right gears to rotate, transmitting the power to the left and right screws.

[0033] The permanent magnet variable frequency motor (1) that drives the screw rotation can adjust the speed and torque according to the machine's load, saving 15-30% of energy.

[0034] The rear bearing assembly includes an intermediate bearing and a rear bearing sequentially mounted on the screw along the axial direction. A rear spacer is also provided at the tail end of the screw, and a rear seal is provided between the rear spacer and the gearbox. The front bearing assembly includes a front bearing mounted on the screw, an intermediate spacer and a front spacer located on both sides of the front bearing, and a front bearing housing cover that seals the front bearing. The left screw is supported on the front bearing, intermediate bearing, and rear bearing, and the outer edge of the bearing is mounted on the screw drive housing. The front bearing is equipped with a front seal and a front bearing cover to ensure that oil from the gearbox does not flow into the screw hopper.

[0035] The screw has a central elongated hole, and the screw hole at the left end of the shaft connects to a rotary joint to introduce a heat source and regulate the temperature of the screw. Of course, a cold source can also be connected as needed.

[0036] The pressure roller seat is provided with an ear loop hole, and a swing pin that can swing is provided in the ear loop hole. The lower pressure roller can swing up and down by connecting to the swing pin. The lower pressure roller is driven to swing up and down by an opening and closing hydraulic cylinder.

[0037] The hopper assembly includes a feeding hopper located above the screw hopper and a duckbill guide seat located at the front end of the screw.

[0038] This patented energy-efficient three-cone screw extrusion tablet press has the following advantages compared to existing technologies:

[0039] (1) Good mixing and plasticizing effect: The three-cone screw extruder has three screws, forming multiple meshing zones. The material is subjected to strong shearing, kneading and stretching during the extrusion process. Its crushing area is larger and the kneading effect is stronger, which can make the material more fully plasticized and more uniformly dispersed. It is especially suitable for processing materials with high pigment and filler content.

[0040] (2) High output: Due to the coordinated operation of the three screws, more material can be transported and processed in the same amount of time, resulting in a significantly higher output compared to the two-cone screw extrusion tablet press. For example, when producing carbon black masterbatch, the output of the three-cone screw extrusion tablet press can reach 180 kg / hour, while that of the two-cone screw extrusion tablet press is only 80 kg / hour.

[0041] (3) Superior product quality: The three-cone screw extruder ensures thorough plasticization and uniform component dispersion, resulting in products with more stable performance and higher quality. For example, the PP flame-retardant cable material produced by the three-cone screw extruder has better strength and elongation than the product produced by the two-cone screw extruder.

[0042] (4) Good energy saving effect: The high efficiency of the three-cone screw extruder tablet press results in relatively low energy consumption when producing the same amount of product. Data shows that, taking the production of 50% concentration carbon black masterbatch as an example, the specific power of the three-cone screw extruder is only 0.2-0.25kw / kg.

[0043] (5) Excellent self-cleaning properties: The three-cone screw structure design makes the material flow more evenly in the machine, avoids material dead corners, reduces material residue and accumulation, thus has good self-cleaning properties, helps to keep the equipment clean and stable, and produces products with more uniform performance.

[0044] The above embodiments are merely illustrative of the principles and effects of this application and are not intended to limit this application. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this application. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this application should still be covered by the claims of this application.

Claims

1. An energy efficient triple cone screw extrusion tablet press characterized by: Includes a base, and a screw drive gearbox assembly, a hopper assembly, a pressure roller assembly, and a pressure roller drive assembly mounted on the base, wherein: The screw drive gearbox assembly includes a screw hopper, a drive motor, a gearbox, and a screw housed within the screw hopper. The screw includes a drive screw and a left screw and a right screw located on either side of the drive screw. The drive motor is connected to the drive screw, and the left and right screws are driven by the gearbox and can compress and convey the material in the screw hopper forward under the drive of the drive screw. The hopper assembly is located above the screw hopper. The pressure roller assembly is located at the front end of the screw drive gearbox assembly and is used to convey the extruded material through the pressure roller; the pressure roller drive assembly is driven to connect with the pressure roller assembly.

2. The energy efficient triple-cone screw extrusion tablet press as claimed in claim 1, wherein: The active screw has a right-hand thread, while the left and right screws have left-hand threads.

3. The energy efficient triple-cone-screw extrusion tablet press as claimed in claim 1, wherein: All screws are tapered screws.

4. The energy efficient triple-cone-screw extrusion tablet press as claimed in claim 1, wherein: The gearbox includes a gearbox body, a front bearing assembly and a rear bearing assembly respectively fitted on the tail ends of all screws, and a gear disposed on all screws and located between the front bearing assembly and the rear bearing assembly. The gears include an intermediate gear located at the tail end of the drive screw, a left gear and a right gear located on the left and right screws respectively; The rear bearing assembly includes an intermediate bearing and a rear bearing that are sequentially sleeved on the screw along the axial direction. The tail end of the screw is also provided with a rear spacer, and a rear seal is provided between the rear spacer and the gearbox. The front bearing assembly includes a front bearing fitted on a screw, a middle spacer and a front spacer provided on both sides of the front bearing, and a front bearing seat cover that seals the front bearing.

5. The energy efficient triple-cone-screw extrusion tablet press as claimed in claim 4, wherein: The intermediate bearing is also provided with a front nut, and the tail end of the screw is also provided with a rear nut.

6. The energy-saving and efficient three-cone screw extruder tablet press according to claim 1, characterized in that: The pressure roller assembly includes a pressure roller seat, an upper pressure roller fixed on the pressure roller seat, and a lower pressure roller located below the upper pressure roller.

7. The energy-saving and efficient three-cone screw extruder tablet press according to claim 6, characterized in that: The pressure roller seat is provided with an ear ring hole, and a swing pin that can swing is provided in the ear ring hole. The lower pressure roller can swing up and down by connecting the swing pin. The lower pressure roller is driven to swing up and down by an opening and closing hydraulic cylinder.

8. The energy efficient triple-cone-screw extrusion tablet press as claimed in claim 1, wherein: The hopper assembly includes a feeding hopper located above the screw hopper and a duckbill guide seat located at the front end of the screw.

9. The energy efficient triple-cone-screw extrusion tablet press as claimed in claim 1, wherein: The pressure roller transmission assembly includes a permanent magnet variable frequency motor and a pressure roller reduction gearbox fixed on the base, as well as an upper pressure roller transmission gear and a lower pressure roller transmission gear, which are respectively connected to the upper pressure roller and the lower pressure roller.

10. The energy efficient triple-cone-screw extrusion tablet press as claimed in claim 5, wherein: Each screw has a central elongated hole and can be connected to a heat source or a cold source through a rotary joint located at the tail end.

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