Special actuator for hot runner
By introducing encoder, bearing cap and other components into the special actuator for hot runners and using cold water for heat dissipation, the problem that existing actuators cannot withstand high temperatures and improve system efficiency.
Patent Information
- Application Number
- CN202421642632.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-12
- Publication Date
- 2025-06-03
- Estimated Expiration
- 2034-07-12
AI Technical Summary
The existing hot runner-specific actuators have limited space and cannot withstand high temperatures, resulting in a decrease in the efficiency of the hot runner system.
A special actuator for hot runners is designed. By introducing components such as encoder, bearing cap, bearing, cylinder, stator, rotor, secondary bearing and waterway into the actuator, cold water absorbs heat generated by the hot runner through the waterway for heat dissipation, thereby improving the working efficiency of the actuator.
In a limited space, the working efficiency of the actuator is improved, and it can better adapt to the high-temperature environment and ensure the efficient operation of the hot runner system.
Smart Images
Figure CN222933252U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of actuators, and more specifically, to a special actuator for hot runner. Background Art
[0002] The main function of the special actuator for hot runner is to control the opening and closing of each nozzle in the hot runner system to ensure that plastic materials can be accurately injected into each cavity of the mold. This actuator is usually operated by electric or pneumatic means, featuring high precision, high response speed, and high temperature resistance. Currently, the main control of hot runner is by cylinders and oil cylinders. However, due to limited space and high temperature in the hot runner, the existing electric cylinders cannot meet the requirements, thus reducing the efficiency of the hot runner. Content of the Utility Model
[0003] The purpose of the utility model is to provide a special actuator for hot runner to solve the problems raised in the above background art: The main function of the special actuator for hot runner is to control the opening and closing of each nozzle in the hot runner system to ensure that plastic materials can be accurately injected into each cavity of the mold. This actuator is usually operated by electric or pneumatic means, featuring high precision, high response speed, and high temperature resistance. Currently, the main control of hot runner is by cylinders and oil cylinders. However, due to limited space and high temperature in the hot runner, the existing electric cylinders cannot meet the requirements, thus reducing the efficiency of the hot runner.
[0004] The special actuator for hot runner includes a rear end cover. One end of the inner cavity of the rear end cover is connected with an encoder. The end of the encoder far away from the rear end cover is connected with a bearing gland. The end of the bearing gland far away from the encoder is connected with a bearing. An encoder is a sensor used to measure position, angle, speed, or other physical quantities. It realizes the monitoring and control of the movement process by converting mechanical movement into electrical signals. Encoders are widely used in automated control systems, robots, numerical control machine tools, and various precision equipment. And the bearing gland is a mechanical component used to fix and protect the bearing. It is usually located outside the bearing housing, fixes the bearing in the correct position through bolts or other fixing devices, and prevents the bearing from generating axial movement or detachment during operation. The bearing gland can also provide a certain sealing effect to prevent dust, moisture, and other pollutants from entering the bearing, thereby extending the service life of the bearing.
[0005] Preferably, the outer side of one end of the rear end cover close to the encoder is connected with a cylinder block. The end of the cylinder block far away from the rear end cover is connected with a front end cover. The rear end cover, the front end cover, and the cylinder block are combined to form an actuator housing.
[0006] Preferably, a stator is connected to the inner surface of the cylinder block. A rotor is connected to the inner cavity of the stator. One end of the rotor away from the bearing is connected to a secondary bearing. And a lead screw is connected to the inner cavity of the rotor. A secondary bearing refers to a bearing used to assist the main bearing (or primary bearing) in machinery. It is usually used to support a secondary shaft or auxiliary shaft to share the load, reduce friction, and improve the stability of the machinery. Secondary bearings are widely used in various mechanical equipment, especially in machinery that requires multiple shafts or complex movements.
[0007] Preferably, a water channel is provided in the inner cavity of the cylinder block. One end of the water channel close to the rear end cover is connected to a water inlet. One end of the water channel away from the rear end cover is connected to a water outlet. One end of the outer surface of the cylinder block close to the rear end cover is connected to an encoder plug. One end of the encoder plug away from the rear end cover is connected to a power line plug. An encoder plug is an electrical connector used to connect an encoder to other electronic devices (such as a controller, a driver, or a computer). The encoder plug transmits the signals generated by the encoder to monitor and control parameters such as position, speed, or angle.
[0008] Preferably, the rear end cover, the encoder, the bearing gland, the bearing, the cylinder block, the stator, the rotor, the secondary bearing, the front end cover, the lead screw, the water outlet, the power line plug, the encoder plug, the water inlet, and the water channel together form a special actuator for a hot runner. A power line plug is an electrical connector used to connect an electrical device to a power source.
[0009] Preferably, the water inlet communicates with the water outlet through the water channel.
[0010] Compared with the prior art, the advantages of the present utility model are as follows:
[0011] 1) In the present utility model, by installing the stator into the cylinder block and then installing the rotor into the stator. At this time, it is fixed at one end of the cylinder block through a bearing support seat, and the bearing is fixed through a bearing gland. The other end of the rotor is fixed on the upper end of the front end cover through a secondary bearing. Then the lead screw is fixed on the rotor. At the same time, one end of the lead screw is connected to an encoder, and power is provided for the actuator through a power line plug. Position information is collected through an encoder plug. Finally, cold water enters the water channel through the water inlet. At this time, the cold water in the water channel will absorb the heat generated by the hot runner, and then the water with heat flows out through the water outlet. In this way, the heat generated by the hot runner can be dissipated by using the water inlet, the water channel, and the water outlet, thereby improving the working efficiency of the actuator within a limited space. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 is the overall structural schematic diagram of the present utility model;
[0013] Figure 2This is the schematic diagram of the overall split structure of the utility model.
[0014] Explanation of the reference numerals in the figure: 1. Rear end cover; 2. Encoder; 3. Bearing gland; 4. Bearing; 5. Cylinder block; 6. Stator; 7. Rotor; 8. Secondary bearing; 9. Front end cover; 10. Lead screw; 11. Water outlet; 12. Power line plug; 13. Encoder plug; 14. Water inlet; 15. Water channel. Specific implementation mode
[0015] Example: Please refer to Figure 1-2 , the special actuator for hot runner, including the rear end cover 1, one end of the inner cavity of the rear end cover 1 is connected with an encoder 2, one end of the encoder 2 away from the rear end cover 1 is connected with a bearing gland 3, one end of the bearing gland 3 away from the encoder 2 is connected with a bearing 4. A bearing is a mechanical component, mainly used to reduce the resistance generated by friction during mechanical transmission, thereby improving the transmission efficiency and service life. The bearing 4 can support the rotating shaft and other moving parts to keep them running smoothly.
[0016] Please refer to Figure 1-2 , on the outer side of one end of the rear end cover 1 close to the encoder 2 is connected with a cylinder block 5, one end of the cylinder block 5 away from the rear end cover 1 is connected with a front end cover 9, and the rear end cover 1, the front end cover 9 and the cylinder block 5 are combined to form the actuator housing.
[0017] Please refer to Figure 1-2 , on the inner surface of the cylinder block 5 is connected with a stator 6, in the inner cavity of the stator 6 is connected with a rotor 7, one end of the rotor 7 away from the bearing 4 is connected with a secondary bearing 8, and in the inner cavity of the rotor 7 is connected with a lead screw 10.
[0018] Please refer to Figure 1-2 , in the inner cavity of the cylinder block 5 is provided with a water channel 15, one end of the water channel 15 close to the rear end cover 1 is connected with a water inlet 14, one end of the water channel 15 away from the rear end cover 1 is connected with a water outlet 11, on the outer surface of the cylinder block 5 close to one end of the rear end cover 1 is connected with an encoder plug 13, one end of the encoder plug 13 away from the rear end cover 1 is connected with a power line plug 12, and the power line plug 12 provides power for the actuator, and the encoder plug 13 collects position information.
[0019] Please refer to Figure 1-2 , the rear end cover 1, the encoder 2, the bearing gland 3, the bearing 4, the cylinder block 5, the stator 6, the rotor 7, the secondary bearing 8, the front end cover 9, the lead screw 10, the water outlet 11, the power line plug 12, the encoder plug 13, the water inlet 14 and the water channel 15 together form the special actuator for hot runner.
[0020] Please refer to Figure 1-2, the water inlet 14 is connected to the water outlet 11 through the water channel 15, and cold water enters the water channel 15 through the water inlet 14. At this time, the cold water in the water channel 15 will absorb the heat generated by the hot runner, and then the water with heat will flow out through the water outlet 11.
[0021] Working principle: First, the stator 6 is installed in the cylinder block 5, and then the rotor 7 is installed in the stator 6. At this time, it is supported by the bearing 4 support seat and fixed at one end of the cylinder block 5, and the bearing 4 is fixed by the bearing gland 3. The other end of the rotor 7 is fixed on the upper end of the front end cover 9 through the secondary bearing 8. Then, the lead screw 10 is fixed on the rotor 7. At the same time, one end of the lead screw 10 is connected to the encoder 2, and power is provided for the actuator through the power line plug 12. The position information is collected through the encoder plug 13. Finally, cold water enters the water channel 15 through the water inlet 14. At this time, the cold water in the water channel 15 will absorb the heat generated by the hot runner, and then the water with heat will flow out through the water outlet 11, and all operations end here.
[0022] The above shows and describes the basic principle, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions in the specification are only preferred examples of the present invention and do not limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.
Claims
1. A hot runner actuator, comprising a rear end cover (1), characterized in that: One end of the inner cavity of the rear end cover (1) is connected to an encoder (2), one end of the encoder (2) away from the rear end cover (1) is connected to a bearing cover (3), and one end of the bearing cover (3) away from the encoder (2) is connected to a bearing (4); The outer side of the end of the rear end cover (1) close to the encoder (2) is connected to a cylinder body (5), and the end of the cylinder body (5) away from the rear end cover (1) is connected to a front end cover (9), and the rear end cover (1), the front end cover (9) and the cylinder body (5) are combined to form an actuator housing; The inner surface of the cylinder body (5) is connected to a stator (6), the inner cavity of the stator (6) is connected to a rotor (7), the end of the rotor (7) away from the bearing (4) is connected to a secondary bearing (8), and the inner cavity of the rotor (7) is connected to a screw rod (10); The inner cavity of the cylinder body (5) is provided with a water channel (15); an end of the water channel (15) close to the rear end cover (1) is connected to a water inlet (14); an end of the water channel (15) away from the rear end cover (1) is connected to a water outlet (11); an end of the outer surface of the cylinder body (5) close to the rear end cover (1) is connected to an encoder plug (13); and an end of the encoder plug (13) away from the rear end cover (1) is connected to a power line plug (12).
2. The hot runner actuator according to claim 1, characterized in that: The water inlet (14) is connected to the water outlet (11) through a water channel (15).