Rubber extruder

Abstract

The utility model discloses a rubber extruding machine which comprises a machine barrel, a gear pump is fixedly installed at the left end of the machine barrel, a machine head is fixedly installed at the left end of the gear pump, an extruding head is arranged in the machine head, an extruding screw is arranged in the machine barrel, a feeding device is fixedly installed at the right end of the machine barrel, and a discharging device is fixedly installed at the right end of the machine barrel. A feeding opening is fixedly formed in the top of the feeding device. Rubber is extruded through the extruder, uniform and stable rubber material molding can be kept, the quality of products is ensured to be within a qualified range, the product percent of pass is effectively improved, the quality of the finished products is high, the unit energy consumption of the products is reduced, and the problems that rubber materials at a discharge port of an existing extruder are not uniform, the pressure of a head part of the extruder fluctuates, and the product quality is low are solved. The quality of a finished product is influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of extruders, in particular to a rubber extruder. Background Art

[0002] Rubber extruder, or extruder for short, is a basic equipment in the rubber industry and one of the key equipment that affects product quality. The rubber enters from the feed port, and the extrusion screw is driven by the motor to rotate and bring the rubber into the barrel. After heating, it is extruded and stirred, and the rubber becomes a semi-fluid state and is discharged from the die of the die. The die can be processed into different shapes. Under continuous operation, the required rubber products can be produced uninterruptedly.

[0003] The invention patent with the patent application publication number CN110978451A discloses a gear pump extruder, including: a feeding assembly, including a first feeding roller and / or a second feeding roller; a gear pump assembly, including a first gear and a second gear meshing with each other, and a first feeding channel is formed between the first gear and the first feeding roller. The gear pump extruder provided by the invention shortens the feeding stroke, reduces energy consumption, reduces the temperature rise of the material, and improves the product quality.

[0004] In the prior art, the current extruder screw is a whole and relatively long one. During the rubber feeding process, the rubber cannot enter the barrel evenly. Therefore, the pressure at the head of the extruder fluctuates, and the final result is that the width and thickness of the semi-finished product exceed the standard requirements. Therefore, improvements are needed. Utility Model Content

[0005] The utility model aims to provide a rubber extruder, which solves the problem that the pressure fluctuation at the head of the extruder affects the quality of the extruded product.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a rubber extruder comprises a barrel, a gear pump is fixedly mounted on the left end of the barrel, a head is fixedly mounted on the left end of the gear pump, an extrusion head is arranged inside the head, an extrusion screw is arranged inside the barrel, a feeding device is fixedly mounted on the right end of the barrel, and a feeding port is fixedly mounted on the top of the feeding device.

[0007] Preferably, a first pressure sensor is disposed inside the left end of the barrel. By designing the first pressure sensor, the extrusion pressure at the rear end of the extrusion screw can be monitored.

[0008] Preferably, a second pressure sensor is provided inside the die head. By designing the second pressure sensor, the extrusion pressure of the extruder head can be monitored.

[0009] Preferably, a servo motor is fixedly mounted at the front end of the gear pump, and the output end of the servo motor is connected to the gear pump. The gear pump can be driven by designing the servo motor.

[0010] Preferably, the left end of the gear pump is provided with an outlet, and the right end of the gear pump is provided with an inlet. The gear pump can be designed to transport soft rubber materials.

[0011] Preferably, the servo motor is provided with a servo controller. By designing the servo controller, the output speed of the servo motor can be controlled.

[0012] Preferably, the servo motor control mode is a torque control mode. Through the setting of the torque control mode, when the external analog quantity is set to 5V, the motor shaft output is 2.5Nm. If the motor shaft load is less than 2.5Nm, the motor rotates forward. When the external load is equal to 2.5Nm, the motor does not rotate. When it is greater than 2.5Nm, the motor reverses. When the external load remains unchanged, the motor will operate at a constant torque.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] The utility model discloses to carry out rubber extrusion through the extruder, can keep the rubber material out of the mold uniform and stable, ensure the quality of the product is within the qualified range, effectively improve the product qualification rate, high finished product quality, and reduce the unit energy consumption of the product, solve the existing technical problems that the rubber material at the discharge port of the extruder is uneven, the pressure fluctuation at the head of the extruder affects the quality of the finished product. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 For this utility model Figure 1 Top view of the local structure.

[0017] In the figure: 1. barrel; 2. die head; 3. extrusion head; 4. extrusion screw; 5. feeding device; 6. feeding port; 7. first pressure sensor; 8. gear pump; 9. second pressure sensor; 10. servo motor; 11. servo controller. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1 , Figure 2 A rubber extruder comprises a barrel 1, a first pressure sensor 7 is arranged inside the left end of the barrel 1, and the extrusion pressure at the tail end of the extrusion screw 4 can be monitored by designing the first pressure sensor 7, a gear pump 8 is fixedly installed at the left end of the barrel 1, an outlet is arranged at the left end of the gear pump 8, and an inlet is arranged at the right end of the gear pump 8, and the soft rubber material can be transported by designing the gear pump 8, a servo motor 10 is fixedly installed at the front end of the gear pump 8, and the output end of the servo motor 10 is connected to the gear pump 8, and the gear pump 8 can be driven by designing the servo motor 10.

[0020] See also Figure 1 , Figure 2 A servo controller 11 is provided on the servo motor 10. By designing the servo controller 11, the output speed of the servo motor 10 can be controlled. The control mode of the servo motor 10 is a torque control mode. Through the setting of the torque control mode, when the external analog quantity is set to 5V, the motor shaft output is 2.5Nm. If the motor shaft load is lower than 2.5Nm, the motor rotates forward. When the external load is equal to 2.5Nm, the motor does not rotate. When it is greater than 2.5Nm, the motor reverses. When the external load remains unchanged, the motor will operate at a constant torque.

[0021] See also Figure 1 , Figure 2 The left end of the gear pump 8 is provided with an outlet, and the right end of the gear pump 8 is provided with an inlet. The gear pump 8 is designed to transport soft rubber materials. The left end of the gear pump 8 is fixedly installed with a machine head 2, and a second pressure sensor 9 is arranged inside the machine head 2. By designing the second pressure sensor 9, the extrusion pressure of the extrusion head 3 can be monitored. The machine head 2 is provided with an extrusion head 3, and the barrel 1 is provided with an extrusion screw 4. A feeding device 5 is fixedly installed on the right end of the barrel 1, and a feeding port 6 is fixedly installed on the top of the feeding device 5.

[0022] The specific implementation process of the utility model is as follows: when in use, the raw material is first added into the feeding device 5 through the feeding port 6, and then the raw material is transported to the extrusion screw 4. The extrusion screw 4 gradually changes the rubber material at room temperature into a soft rubber material with a certain fluidity of about 100°C through rotation and extrusion; then after the servo motor 10 starts to work, the gear pump 8 rotates together, and the gear pump 8 extrude the rubber material from the die of the extrusion head 3 of the head 2 to form a rubber product with the same shape as the die plate; during the working process, as the rubber material is ejected, the pressure at the outlet of the gear pump 8 will drop slightly, and the resistance torque will drop at this time. The servo controller 11 will detect the drop in the output current of the servo motor 10, and the servo controller 11 will issue an instruction to increase the output of the current, increase the speed of the servo motor 10, increase the discharge of the rubber material, and the pressure of the rubber material returns to the set value to maintain the normal supply of the ejected rubber material; on the contrary, when the pressure of the rubber material increases, the speed of the servo motor 10 will decrease slightly, and finally the rubber material ejection will be kept stable to ensure that the quality of the product is within the qualified range. The system can effectively increase the product qualification rate and reduce the unit energy consumption of the product.

[0023] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rubber extruder, comprising a barrel (1), characterized in that: A gear pump (8) is fixedly mounted on the left end of the barrel (1), a head (2) is fixedly mounted on the left end of the gear pump (8), an extrusion head (3) is arranged inside the head (2), an extrusion screw (4) is arranged inside the barrel (1), a feeding device (5) is fixedly mounted on the right end of the barrel (1), a feeding port (6) is fixedly mounted on the top of the feeding device (5); a first pressure sensor (7) is arranged inside the left end of the barrel (1); a second pressure sensor (9) is arranged inside the head (2); and the control mode of the servo motor (10) is a torque control mode.

2. A rubber extruder according to claim 1, characterized in that: A servo motor (10) is fixedly mounted on the front end of the gear pump (8), and an output end of the servo motor (10) is connected to the gear pump (8).

3. A rubber extruder according to claim 1, characterized in that: The left end of the gear pump (8) is provided with an outlet, and the right end of the gear pump (8) is provided with an inlet.

4. A rubber extruder according to claim 1, characterized in that: The servo motor (10) is provided with a servo controller (11).

Images