Extruder with vacuum waste removing device

Abstract

The utility model relates to an extruder with a vacuum waste material removing device. The extruder comprises a machine barrel and the vacuum waste material removing device, wherein the vacuum waste material removing device is mounted on a machine barrel and comprises a vacuum connecting seat, a gland, a cylinder seat plate, a vacuum guide column, a sealing assembly and a vacuum cylinder; the connecting base is installed above the machine barrel, the gland is installed on the top of the vacuum connecting base, the air cylinder base plate is arranged above the gland, one end of the vacuum guide column is connected with the air cylinder base plate, and the other end of the vacuum guide column sequentially penetrates through the gland and the vacuum connecting base, extends into the machine barrel and abuts against the screw rod. The vacuum cylinder is mounted on the cylinder seat plate; and a cylinder piston rod is connected with the gland. The vacuum guide pillar provided by the utility model is integrally designed, is simple to disassemble and convenient to maintain and clean regularly, and meanwhile, by arranging the sealing assembly, the sealing effect between the vacuum guide pillar and the gland is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of extruders, in particular to an extruder with a vacuum waste removal device. Background Art

[0002] An extruder is a type of processing equipment used for the continuous production of plastic products, widely used in the plastics processing industry. It transforms raw plastic into various shapes through a process of heating, melting, extrusion, and cooling. During the extrusion process, the material may contain air, moisture, and other volatile components. If not removed promptly, these can form bubbles or holes in the final product, affecting its mechanical properties and appearance. A vacuum degassing device can effectively remove these gases and volatiles, ensuring the quality of the finished product.

[0003] There are some designs in the prior art for extruders with vacuum waste removal devices. However, the existing vacuum waste removal devices usually provide a special-shaped piston at the bottom of the guide column to achieve a mating connection with the screw in the barrel. This combined vacuum guide column is difficult to disassemble, which is not conducive to regular maintenance and cleaning of the vacuum waste removal device. In addition, the existing vacuum guide column is usually only equipped with an O-ring or oil seal for sealing. When the guide column moves up and down to clean the material, it is easy to cause displacement and leakage. Utility Model Content

[0004] The purpose of the utility model is to solve one of the above-mentioned technical problems and to provide an extruder with a vacuum waste removal device. By designing an integrated vacuum guide column, the disassembly process of the vacuum waste removal device is simplified, and the efficiency of maintenance and cleaning is improved. At the same time, by arranging a double oil seal on the vacuum guide column, the sealing effect of the connection between the vacuum guide column and the pressure cover is improved.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] An extruder with a vacuum waste removal device, comprising:

[0007] a barrel, in which a screw is provided;

[0008] Vacuum waste removal device, the vacuum waste removal device includes:

[0009] Vacuum connecting seat, the connecting seat is installed above the barrel;

[0010] Gland, which is installed on the top of the vacuum connection seat;

[0011] Cylinder seat plate, which is arranged above the gland;

[0012] The vacuum guide pin has one end connected to the cylinder base plate, and the other end passes through the gland and the vacuum connection seat in sequence, extends into the barrel, and abuts against the screw;

[0013] The sealing assembly includes at least two oil seals, which are respectively arranged on the upper and lower sides of the gland, and the vacuum guide column passes through the interior of the oil seals;

[0014] Vacuum cylinder, the vacuum cylinder includes a cylinder body, a piston and a piston rod. The cylinder body is fixed above the cylinder base plate, the piston is arranged inside the cylinder body, one end of the piston rod is connected to the piston, and the other end passes through the bottom of the cylinder body and is connected to the pressure cover.

[0015] In some embodiments of the present invention, a connecting section is provided at one end of the vacuum guide column, and the cross-sectional shape of the connecting section is rectangular; a groove is provided on the surface of the cylinder base plate, and the cross-sectional shape of the groove matches the cross-sectional shape of the connecting section; the connecting section is inserted into the groove and is connected to the cylinder base plate;

[0016] In some embodiments of the present invention, a vacuum guide column baffle and screws are provided on the cylinder seat plate; the screws sequentially penetrate the vacuum guide column baffle and the cylinder seat plate and are inserted into the vacuum guide column to be connected and fixed to the vacuum guide column.

[0017] In some embodiments of the present invention, the axial cross-section of one end of the vacuum guide column connected to the screw is arranged in an arc shape, and the curvature thereof matches the curvature of the outer wall of the screw.

[0018] In some embodiments of the present invention, the vacuum guide columns include two, and the two vacuum guide columns are symmetrically arranged relative to the piston rod.

[0019] In some embodiments of the present invention, a ball valve and a pressure gauge are further provided above the gland, and the ball valve, the pressure gauge and the gland are connected via a three-way connector.

[0020] In some embodiments of the present invention, the sealing assembly further includes an external sealing member, which is sleeved on the outside of the oil seal and completely wraps the oil seal.

[0021] In some embodiments of the present invention, one end of the pressure cover is hinged to the vacuum connection seat, and the other end is movably connected to the vacuum connection seat through a buckle.

[0022] In some embodiments of the present invention, a first connecting portion is provided in sequence at one end of the piston rod connected to the gland, one end of the first connecting portion is connected to the piston rod body, and the other end is connected to the gland; the diameter of the first connecting portion is larger than the piston rod body;

[0023] A clearance sleeve is sleeved on the piston rod, and the clearance sleeve abuts against the first connecting portion.

[0024] In some embodiments of the present invention, a plurality of vacuum waste removal devices are arranged at intervals along the extension direction of the barrel.

[0025] The beneficial effects of the present invention are:

[0026] 1. The vacuum guide column provided by the utility model is an integrated design with the same upper and lower diameters. After removing the cylinder base plate, the entire vacuum guide column can be directly taken out, which is simple to disassemble and convenient for regular maintenance and cleaning.

[0027] 2. The end of the vacuum guide column provided by the utility model that contacts the screw is set to be arc-shaped so as to fit the screw and ensure the cleaning effect of the material.

[0028] 3. The vacuum guide column provided in this embodiment is equipped with two oil seals, which improve the sealing effect of the connection between the vacuum guide column and the pressure cover, and avoid displacement of the oil seal and leakage when the guide column moves up and down to clean materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0030] Figure 1 It is a structural schematic diagram of an extruder with a vacuum waste removal device;

[0031] Figure 2 It is a structural schematic diagram of the working state of the vacuum waste removal device;

[0032] Figure 3 A top view of the vacuum waste removal device in working condition;

[0033] Figure 4 It is a side view of the vacuum waste removal device in working state;

[0034] Figure 5 It is a front view of the vacuum waste removal device in working state;

[0035] Figure 6 for Figure 5 Middle AA section view;

[0036] Figure 7 This is a structural diagram of the vacuum waste removal device in a non-working state;

[0037] Figure 8 It is a side view of the vacuum waste removal device in a non-working state;

[0038] Figure 9 Front view of the vacuum waste removal device in non-working state

[0039] Figure 10 for Figure 9 Middle AA section view;

[0040] Figure 11 Schematic diagram of the structure of the vacuum guide column;

[0041] Figure 12 is a side view of the vacuum guide column;

[0042] Wherein, the accompanying drawings are marked as follows:

[0043] 1. Barrel; 11. Barrel sleeve; 12. Heating ring;

[0044] 2. Vacuum waste removal device; 21. Vacuum connector; 211. Butterfly hinge; 212. Buckle; 22. Gland; 23. Cylinder seat plate; 231. Vacuum guide post retainer; 232. Screw; 24. Vacuum guide post; 241. Vacuum guide post body; 242. Connecting section; 243. Threaded hole; 25. Seal assembly; 251. Oil seal; 252. External seal; 26. Vacuum cylinder; 261. Cylinder body; 262. Piston rod; 263. Piston; 264. Clearance sleeve; 27. Pressure gauge; 28. Ball valve; 29. ​​Three-way connector;

[0045] 3. Feeding device;

[0046] 4. Confluence core assembly;

[0047] 5. Frame; 51. Front support; 52. Rear support. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is described and illustrated below in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely used to explain this application and are not intended to limit this application. Based on the embodiments provided in this application, all other embodiments obtained by those of ordinary skill in the art without making any creative efforts are within the scope of protection of this application.

[0049] Obviously, the drawings described below are only some examples or embodiments of the present application. For ordinary technicians in this field, they can also apply the present application to other similar scenarios based on these drawings without any creative work.

[0050] The terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the quantity of the technical features indicated. Therefore, the terms "first" and "second" may explicitly or implicitly include one or more of the features.

[0051] Unless otherwise defined, technical or scientific terms used in this application shall have the ordinary meanings understood by persons of ordinary skill in the technical field to which this application belongs. The terms "a," "an," "an," and similar expressions used in this application do not indicate limitations on quantity and may refer to the singular or plural. The terms "include," "comprising," "having," and any variations thereof used in this application are intended to cover non-exclusive inclusions.

[0052] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0053] The technical solution of the present invention is described in detail below in conjunction with specific embodiments and the accompanying drawings.

[0054] As attached Figure 1 -Attached Figure 12 As shown, in an illustrative embodiment of an extruder with a vacuum waste removal device 2 of the present invention, the extruder includes a barrel 1 and a vacuum waste removal device 2 .

[0055] Among them, such as Figure 1 As shown, the outer side of the barrel 1 is provided with a plurality of barrel sleeves 11 arranged in an arranged manner, and each barrel sleeve 11 is provided with a heating coil 12. A feeding device 3 is connected to one end of the barrel 1 in the longitudinal direction, and a confluence core assembly 4 is installed at the other end. A cavity is provided in the barrel 1, and at least one screw is provided in the cavity. A vacuum port is provided on the wall of the barrel 1, and one end of the vacuum port is connected to the cavity in the barrel 1. A frame 5 is provided at the bottom of the barrel 1, and the frame 5 includes a front support portion 51 and a rear support portion 52, which are respectively supported at both ends of the barrel 1 in the longitudinal direction.

[0056] The vacuum waste removal device 2 is installed above the barrel 1 and is located between two adjacent barrel sleeves 11. A plurality of vacuum waste removal devices 2 are arranged at intervals along the extension direction of the barrel 1.

[0057] The vacuum waste removal device 2 includes a vacuum connection seat 21 , a pressure cover 22 , a cylinder seat plate 23 , a vacuum guide column 24 , a sealing assembly 25 and a vacuum cylinder 26 .

[0058] Among them, the vacuum connecting seat 21 is fixedly installed above the barrel 1, and a cavity is provided inside the vacuum connecting seat 21. The cavity inside the vacuum connecting seat 21 is connected to the cavity in the barrel 1 through the vacuum port on the barrel wall of the barrel 1.

[0059] The pressure cover 22 is installed on the top of the vacuum connection seat 21 to seal the cavity in the vacuum connection seat 21, fix the vacuum guide column 24, and install a pressure gauge 27 and a valve to monitor and control the vacuum degree in the cavity.

[0060] The cylinder base plate 23 is spaced apart from the gland 22 and is arranged above the gland 22 for fixing the vacuum guide pins 24 and the vacuum cylinder 26 .

[0061] One end of the vacuum guide pin 24 is connected to the cylinder base plate 23, and the other end passes through the gland 22 and the vacuum connection seat 21 in sequence, extends into the cavity of the barrel 1 through the vacuum port, and abuts against the screw.

[0062] The sealing assembly 25 includes at least two oil seals 251, which are respectively fixed to the upper and lower sides of the gland 22. The vacuum guide column 24 passes through the two oil seals 251 on the upper and lower sides of the gland 22 to avoid air leakage and improve sealing when the vacuum guide column 24 moves up and down to clean materials.

[0063] The vacuum cylinder 26 includes a cylinder body 261, a piston 263, and a piston rod 262. The cylinder body 261 is fixed above the cylinder base plate 23, the piston 263 is disposed inside the cylinder body 261, and one end of the piston rod 262 is connected to the piston 263, while the other end passes through the bottom of the cylinder body 261 and is fixedly connected to the top of the gland 22.

[0064] The vacuum guide pin 24 provided in this embodiment is an integrated design with identical diameters at the top and bottom. The entire vacuum guide pin 24 can be removed directly after removing the cylinder base plate 23, making disassembly simple and convenient for regular maintenance and cleaning. The end of the vacuum guide pin 24 that contacts the screw is designed in an arc shape to conform to the screw and ensure effective material cleaning. Furthermore, the vacuum guide pin 24 provided in this embodiment is equipped with two oil seals 251, which enhance the sealing effect at the connection between the vacuum guide pin 24 and the gland 22, preventing oil seal displacement and air leakage when the guide pin moves up and down to clean material.

[0065] In order to improve the stability and reliability of the connection between the vacuum guide column 24 and the cylinder base plate 23 and prevent the vacuum guide column 24 from rotating or shifting during operation, in some embodiments of the present invention, as shown in the attached Figure 11 -Attached Figure 12 As shown, the vacuum guide column 24 includes an integral vacuum guide column body 241 and a connecting section 242. The connecting section 242 has a rectangular cross-section. A groove is formed on the surface of the cylinder base plate 23, and the cross-section of the groove matches the cross-section of the connecting section 242. The connecting section 242 is inserted into the groove and connected to the cylinder base plate 23.

[0066] In order to further improve the stability and reliability of the connection between the vacuum guide column 24 and the cylinder base plate 23, in some embodiments of the present invention, as shown in the attached Figure 2-Attached Figure 10 As shown, a vacuum guide post baffle 231 and a hexagon socket head screw 232 are provided on the cylinder base plate 23; a threaded hole 243 is formed at the end of the vacuum guide post 24 connected to the cylinder base plate 23, and the screw 232 passes through the vacuum guide post baffle 231 and the cylinder base plate 23 in sequence and is inserted into the threaded hole 243 to be connected and fixed to the vacuum guide post 24.

[0067] In order to make the contact between the vacuum guide column 24 and the screw closer, reduce the wear of the contact surface, and improve the service life of the device, in some embodiments of the present invention, the axial cross-section of one end of the vacuum guide column 24 connected to the screw is arc-shaped, and its curvature matches the curvature of the outer wall of the screw.

[0068] In order to balance the force of the vacuum guide column 24, reduce deformation and wear caused by uneven force on one side, and improve the stability and durability of the device, in some embodiments of the present invention, the vacuum guide column 24 includes two vacuum guide columns 24, and the two vacuum guide columns 24 are symmetrically arranged relative to the piston rod 262.

[0069] In order to monitor and adjust the working status of the vacuum waste removal device 2 in real time, ensure that the system operates at the optimal pressure, and prevent overpressure or leakage, in some embodiments of the present invention, a ball valve 28 and a pressure gauge 27 are further provided above the pressure cover 22, and the ball valve 28, the pressure gauge 27 are connected to the pressure cover 22 through a three-way connector 29.

[0070] In order to further improve the sealing effect of the sealing assembly 25, prevent the oil seal 251 from failing due to external environmental influences, and extend the service life of the sealing assembly 25, in some embodiments of the present invention, the sealing assembly 25 further includes an external seal 252, which is sleeved on the outside of the oil seal 251 and completely wraps the oil seal 251.

[0071] In order to improve the efficiency of device maintenance and cleaning, in some embodiments of the present invention, one end of the pressure cover 22 is hinged to the vacuum connection seat 21 through a butterfly hinge 211, and the other end is movably connected to the vacuum connection seat 21 through a buckle 212.

[0072] In order to improve the stability of the connection between the piston rod 262 and the pressure cover 22 and reduce the swing and wear of the piston rod 262, in some embodiments of the present invention, the end of the piston rod 262 connected to the pressure cover 22 is provided with a first connecting portion and a second connecting portion connected to each other in sequence, wherein the diameter of the first connecting portion is larger than the piston rod 262 body, and the diameter of the second connecting portion is smaller than the first connecting portion. One end of the first connecting portion is connected to the piston rod 262 body, and the other end is connected to the second connecting portion. The second connecting portion is inserted into the interior of the pressure cover 22 and connected to the pressure cover 22, and after the second connecting portion is connected, the first connecting portion abuts against the pressure cover 22. In this embodiment, the first connecting portion, the second connecting portion and the piston rod 262 body are of an integrated design. A gap sleeve 264 is provided on the piston rod 262 body, and the gap sleeve 264 abuts against the first connecting portion.

[0073] The working principle of this utility model is:

[0074] When in use, the vacuum guide pins 24 on the cylinder base plate 23 can move up and down under the action of the vacuum cylinder 26.

[0075] When there is no need to clean the material, the vacuum waste removal device 2 is in a non-working state, as shown in the attached Figure 7 -Attached Figure 10 As shown, the piston rod 262 is in the state of being released from the cylinder, and at this time, the vacuum guide pin 24 exits the vacuum hole of the barrel 1.

[0076] When material cleaning is required, the vacuum waste removal device 2 is in working state, as shown in the attached Figure 2 -Attached Figure 6 As shown, the piston rod 262 retreats into the cylinder body 261 of the vacuum cylinder 26, driving the vacuum guide column 24 to enter the vacuum port of the barrel 1, pushing the material in the vacuum port back into the barrel 1, and then the vacuum cylinder 26 drives the vacuum guide column 24 to reset, completing a cleaning action.

[0077] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0078] The above embodiments are only used to illustrate the technical solution of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention. They should all be included in the scope of the technical solution for which protection is requested in the present invention.

Claims

1. An extruder with a vacuum waste removal device, characterized in that: include: a barrel, wherein a screw is provided in the barrel; A vacuum waste removal device, comprising: A vacuum connecting seat, the connecting seat being installed above the barrel; A gland, mounted on the top of the vacuum connection seat; A cylinder seat plate, the cylinder seat plate being arranged above the gland; a vacuum guide pin, one end of which is connected to the cylinder base plate, and the other end of which passes through the gland and the vacuum connection seat in sequence, extends into the barrel, and abuts against the screw; A sealing assembly comprising at least two oil seals, respectively disposed on the upper and lower sides of the gland, wherein the vacuum guide pin passes through the interior of the oil seals; A vacuum cylinder comprises a cylinder body, a piston and a piston rod. The cylinder body is fixed above the cylinder seat plate. The piston is arranged inside the cylinder body. One end of the piston rod is connected to the piston, and the other end passes through the bottom of the cylinder body and is connected to the pressure cover.

2. The extruder with a vacuum waste removal device according to claim 1, characterized in that: A connecting section is provided at one end of the vacuum guide column, and the cross-sectional shape of the connecting section is rectangular; a groove is provided on the plate surface of the cylinder seat plate, and the cross-sectional shape of the groove matches the cross-sectional shape of the connecting section; the connecting section is inserted into the groove and matched with the cylinder seat plate.

3. The extruder with vacuum waste removal device according to claim 1, characterized in that: The cylinder seat plate is provided with a vacuum guide column baffle and screws; the screws sequentially penetrate the vacuum guide column baffle and the cylinder seat plate and are inserted into the vacuum guide column to be connected and fixed to the vacuum guide column.

4. The extruder with a vacuum waste removal device according to claim 1, characterized in that: The axial cross-section of one end of the vacuum guide column connected to the screw is arranged in an arc shape, and the curvature thereof matches the curvature of the outer wall of the screw.

5. The extruder with a vacuum waste removal device according to any one of claims 1 to 4, characterized in that: The vacuum guide columns include two, and the two vacuum guide columns are symmetrically arranged relative to the piston rod.

6. The extruder with vacuum waste removal device according to claim 1, characterized in that: A ball valve and a pressure gauge are also provided above the gland, and the ball valve, the pressure gauge and the gland are connected via a three-way connector.

7. The extruder with vacuum waste removal device according to claim 1, characterized in that: The sealing assembly further includes an external sealing member, which is sleeved on the outside of the oil seal and completely wraps the oil seal.

8. The extruder with vacuum waste removal device according to claim 1, characterized in that: One end of the pressure cover is hinged to the vacuum connection seat, and the other end is movably connected to the vacuum connection seat through a buckle.

9. The extruder with vacuum waste removal device according to claim 1, characterized in that: The end of the piston rod connected to the gland is provided with a first connecting portion, one end of the first connecting portion is connected to the piston rod body, and the other end is connected to the gland; the diameter of the first connecting portion is larger than the piston rod body; A clearance sleeve is sleeved on the piston rod, and the clearance sleeve abuts against the first connecting portion.

10. The extruder with a vacuum waste removal device according to claim 1, characterized in that: A plurality of vacuum waste removal devices are arranged at intervals along the extending direction of the barrel.

Images