Hydraulic balancing extruder

Abstract

A hydraulic balancing extruder includes a porous die plate base, a porous die plate, an extrusion plate, a left bearing, a bearing plate base, a barrel, a hydraulic cylinder, a frame, a bearing plate cover, a reduction motor, a gear, a right bearing, and a rack. The reduction motor is an AC variable frequency motor. The porous die plate base is cylindrical. The porous die plate is located at the top of the porous die plate base and is integrally formed with the porous die plate base. The porous die plate and the porous die plate base are clearance-fitted with the barrel. The extrusion plate is connected to the piston rod end of the hydraulic cylinder and is clearance-fitted with the barrel. The barrel is clearance-fitted with the sliding bearing formed by the left and right bearing plates. Bosses are provided on the exterior of both ends of the barrel. The bosses are bolted to the rack. The gear is mounted on the output shaft of the reduction motor and meshes with the rack. During operation, the barrel moves in the extrusion direction faster than the extrusion plate, so the difference in discharge speed between the holes of the porous die plates of equal thickness can be controlled within a small range.

Description

Technical Field

[0001] The invention relates to a hydraulic balancing extruder. Background Art

[0002] A hydraulic extruder is used in the production of certain viscous materials. Its main components are a barrel and a hydraulically driven extrusion plate, with a porous die plate mounted at the lower end of the barrel. The porous die plate is a plate of uniform thickness with multiple holes of equal diameter evenly spaced across its surface. During operation, the material is placed in the barrel, and hydraulic pressure forces the extrusion plate to force the material out of the porous die plate. Because the barrel remains stationary during the extrusion process, the inner wall of the barrel exerts frictional resistance on the material in contact with it. This, combined with the inherent viscosity of the material and the porous die plate's structure, results in extremely uneven discharge rates among the various holes in the die plate, with holes closer to the center exhibiting faster discharge rates. This highly uneven discharge severely impacts the efficiency of subsequent processes. Summary of the Invention

[0003] In order to overcome the above-mentioned shortcomings of the prior art, the present invention provides a hydraulic balancing extruder, whose barrel can move in the extrusion direction at a speed higher than the extrusion disk, so that the difference in discharge speed between the holes of the porous die disk with equal thickness can be controlled within a smaller range, thereby improving the production efficiency of the subsequent process.

[0004] The technical solution adopted by the present invention to solve its technical problem is: the designed hydraulic balanced extruder includes a porous die plate seat, a porous die plate, an extrusion plate, a left bearing, a bearing seat, a barrel, a hydraulic cylinder, a frame, a bearing cover, a reduction motor, a gear, a right bearing and a rack. The porous die plate seat, the hydraulic cylinder, the bearing seat and the reduction motor are installed on the frame. The motor of the reduction motor is an AC variable frequency motor. The left bearing and the right bearing constitute a sliding bearing. The bearing seat and the bearing cover constitute a split sliding bearing seat. The porous die plate seat is a cylindrical body. The hole die plate is a plate of equal thickness, and its disk surface is evenly distributed with multiple through holes of the same diameter in a manner of equal hole spacing. The porous die plate is arranged at the top of the porous die plate seat and is made into an integral part with the porous die plate seat. The porous die plate and the porous die plate seat are clearance-matched with the barrel. The extrusion plate is connected to the end of the piston rod of the hydraulic cylinder and is clearance-matched with the barrel. The barrel and the sliding bearing composed of the left and right bearings are clearance-matched. Bosses are provided on the outside of both ends of the barrel, and the bosses are connected to the rack with bolts. The gear is installed on the output shaft of the reduction motor and meshes with the rack.

[0005] The reducer of the reduction motor described in this technical solution can be a cycloid pinwheel reducer.

[0006] The operating principle of the present invention is that when the barrel moves faster in the extrusion direction than the extrusion disc, the friction exerted by the barrel's inner wall on the material in contact with it acts as a traction force on the material. Due to the viscosity effect, this traction also affects areas farther from the barrel's inner wall, with areas closer to the inner wall being more affected. The greater the effect, the greater the effect on increasing the discharge speed. This can reduce the aforementioned uneven discharge and minimize the difference in discharge speed between holes. It should be noted that on a multi-hole die, the larger the radius, the more holes there are. To achieve the same discharge speed for each hole, areas with larger radii require more material than areas with smaller radii. However, due to the viscosity effect, this cannot be achieved even if the barrel and the extrusion disc move in the same direction and at the same speed. During operation, the electronic control system adjusts the AC power frequency to adjust the output speed of the reduction motor, causing the barrel, driven by the rack and pinion, to move faster in the extrusion direction than the extrusion disc, thereby minimizing the difference in discharge speed between holes.

[0007] The beneficial effect of the present invention is that during operation, the barrel moves in the extrusion direction faster than the extrusion disk, so that the difference in discharge speed between the holes of the porous die disk with equal thickness is controlled within a small range, thereby improving the production efficiency of the subsequent process. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is the front view of the present invention.

[0009] Figure 2 yes Figure 1 AA cross-sectional view.

[0010] In the figure, 1. porous die plate seat, 2. porous die plate, 3. extrusion plate, 4. left bearing, 5. bearing seat, 6. barrel, 7. hydraulic cylinder, 8. frame, 9. bearing cover, 10. reduction motor, 11. gear, 12. right bearing, 13. rack. DETAILED DESCRIPTION

[0011] from Figure 1 and Figure 2As can be seen in the figure, the hydraulic balancing extruder of the embodiment of the present invention includes a porous die plate base 1, a porous die plate 2, an extrusion plate 3, a left bearing 4, a bearing seat 5, a barrel 6, a hydraulic cylinder 7, a frame 8, a bearing cover 9, a reduction motor 10, a gear 11, a right bearing 12 and a rack 13. The porous die plate 2 is a plate of uniform thickness, and a plurality of through holes of the same diameter are evenly distributed on its surface in a manner of equal hole spacing. The porous die plate base 1, the hydraulic cylinder 7, the bearing seat 5 and the reduction motor 10 are mounted on the frame 8. The motor of the reduction motor 10 is an AC variable frequency motor, and the reducer of the reduction motor 10 is a cycloidal pinwheel reducer. The left bearing 4 and the right bearing 12 constitute a sliding bearing, and the bearing seat 5 and the bearing cover 9 constitute a split sliding bearing seat. The porous die base 1 is cylindrical. The porous die base 2 is positioned at the top of the porous die base 1 and is integrally formed with the porous die base 1. The porous die base 2 and the porous die base 1 have a clearance fit with the barrel 6. The extrusion plate 3 is connected to the piston rod end of the hydraulic cylinder 7 and has a clearance fit with the barrel 6. The barrel 6 and the sliding bearing formed by the left and right bearing shells 4 and 12 have a clearance fit. Bosses are provided on the exterior of the barrel 6 at both ends, which are bolted to the rack 13. Gear 11 is mounted on the output shaft of the reduction motor 10 and meshes with the rack 13. During operation, the output speed of the reduction motor 10 is adjusted by adjusting the power supply frequency through the electronic control system, so that the barrel 6, driven by gear 11 and rack 13, moves in the extrusion direction at a faster speed than the extrusion plate 3. In this way, the frictional force exerted by the inner wall of barrel 6 on the material in contact with it is transformed into a traction force on the material. Due to the viscosity effect, this traction force also affects areas farther from the inner wall of barrel 6, with the effect being less pronounced the further away the area is from the inner wall. The more pronounced the effect, that is, the closer the area is to the inner wall of barrel 6, the greater the effect of increasing the discharge speed. This can reduce the aforementioned uneven discharge and keep the difference in discharge speed between each hole within a small range. This effectively keeps the difference in discharge speed between each hole within a small range.

Claims

1. A hydraulic balancing extruder, comprising a porous die plate base, a porous die plate, an extrusion plate, a left bearing, a bearing seat, a barrel, a hydraulic cylinder, a frame, a bearing cover, a reduction motor, a gear, a right bearing and a rack, characterized in that: The porous die plate seat, hydraulic cylinder, bearing seat and reduction motor are installed on the frame. The motor of the reduction motor is an AC variable frequency motor. The left bearing and the right bearing constitute a sliding bearing. The bearing seat and the bearing cover constitute a split sliding bearing seat. The porous die plate seat is a cylindrical body. The porous die plate is a plate of equal thickness. Its plate surface is evenly distributed with multiple through holes of the same diameter in a manner of equal hole spacing. The porous die plate is located at the top of the porous die plate seat and is made into one piece with the porous die plate seat. The porous die plate and the porous die plate seat are clearance-matched with the barrel. The extrusion plate is connected The piston rod end connected to the hydraulic cylinder has a clearance fit with the barrel, and the barrel has a clearance fit with the sliding bearing composed of the left and right bearings. Bosses are provided on the outside of both ends of the barrel, and the bosses are connected to the rack with bolts. The gear is installed on the output shaft of the reduction motor and meshes with the rack. When working, the output speed of the reduction motor is adjusted by adjusting the AC frequency of the power supply through the electronic control system, so that the barrel driven by the gear rack moves in the extrusion direction faster than the extrusion disk, thereby controlling the difference in discharge speed between each hole within a smaller range.

2. The hydraulic balancing extruder according to claim 1, characterized in that: The reducer of the reduction motor is a cycloid pinwheel reducer.

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