Cooling device for ball screw of all-electric injection molding machine

Abstract

The utility model discloses a cooling device for a ball screw of an all-electric injection molding machine, which comprises the ball screw, one end of the ball screw is in threaded connection with a ball nut, the outer part of the ball nut is connected with a crosshead thrust seat, the middle part of the crosshead thrust seat is provided with a flow guide assembly, one side of the crosshead thrust seat is provided with a cooling assembly, and the other side of the crosshead thrust seat is provided with a water inlet and a water outlet. The output end of the cooling assembly is communicated with the flow guide assembly through a pipeline, after gas filtered by the gas source is treated by the vortex cooler, cooling gas is conveyed into the crosshead thrust seat through cooperation of a gas pipe and a gas pipe connector, a closed cavity formed by combining the crosshead thrust seat and the ball nut is filled with the cooling gas, and the crosshead thrust seat and the ball nut are sealed. The surface of the outer body of the ball nut is coated with the cooling gas, and the cooling gas with heat of the ball nut is exhausted through the exhaust pipeline and the silencer at the lower part of the crosshead thrust seat, so that the heat of the ball nut is taken away through continuous flowing of the cooling gas, the heat dissipation effect of the ball nut is improved, and the mold closing rate of the injection molding machine is increased.

Description

Technical Field

[0001] This utility model relates to the technical field of ball screw cooling equipment for all-electric injection molding machines, and in particular to a cooling device for ball screws of all-electric injection molding machines. Background Technology

[0002] With the development and popularization of all-electric injection molding machines, the ball screw and nut of the mold clamping and locking mechanism are subjected to a large working load during reciprocating mold clamping. Driven by the servo motor, the ball screw speed is 0~2000 rpm and takes 0.3 seconds. It drives the load of several tons to frequently start and stop and brake. The ball screw pair is subjected to extreme and variable friction, which causes the temperature to rise rapidly. However, the ball screw is embedded in the sealed casting body. The heat conduction efficiency of the casting body cannot meet the friction heat dissipation requirements of the ball screw pair, resulting in a low heat dissipation efficiency of the mold clamping ball nut.

[0003] If high-speed operation is maintained without other cooling measures, the accumulated heat from the reciprocating motion of the ball screw pair will eventually exceed the upper temperature limit of the ball screw pair, easily leading to damage to the ball nut. While pursuing the high rigidity, high speed, and high precision of ball screws, the problem of frictional heat generation in ball screws is becoming increasingly prominent. Even with sufficient lubrication, the occurrence of excessive temperature rise cannot be completely prevented. When the ball screw generates heat due to friction, the only solutions are to reduce the mold closing speed and shorten the grease supply interval. This not only fails to meet customer requirements for speed and efficiency but also increases operating costs due to excessive grease consumption. Utility Model Content

[0004] The purpose of this utility model is to provide a cooling device for ball screws in all-electric injection molding machines, so as to solve the problems mentioned in the background art, such as the ball nuts of the mold clamping and locking mechanism in all-electric injection molding machines being prone to overheating and damage during production.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a cooling device for ball screws in an all-electric injection molding machine, comprising a ball screw, a ball nut threadedly connected to one end of the ball screw, a crosshead thrust seat externally connected to the ball nut, a flow guide component in the middle of the crosshead thrust seat, a cooling component on one side of the crosshead thrust seat, and the output end of the cooling component connected to the flow guide component via a pipe.

[0006] Preferably, the flow guiding assembly includes a cooling groove annularly formed on the inner wall of the crosshead thrust seat, an air intake pipe connected to the cooling groove at the top of the crosshead thrust seat, an air pipe connector connected to the end of the air intake pipe, and an exhaust pipe connected to the cooling groove at the bottom of the crosshead thrust seat, with a muffler connected to the end of the exhaust pipe.

[0007] Preferably, the cooling assembly includes a vortex cooler provided on one side of the crosshead thrust seat, and the output end of the vortex cooler is connected to the air pipe connector through an air pipe.

[0008] Preferably, the crosshead thrust seat is provided with symmetrical mounting slots on the side of the cooling tank, and an O-ring is fitted inside the mounting slot.

[0009] Preferably, the outer wall of the crosshead thrust seat is provided with a temperature sensing socket, and a temperature sensing probe that fits against the surface of the ball nut is inserted into the end of the temperature sensing socket.

[0010] Preferably, after the ball nut is installed in the middle of the crosshead thrust seat, it forms a sealed cavity for the cooling groove.

[0011] Preferably, the intake pipe is provided with several plugs.

[0012] The beneficial effects of this utility model are:

[0013] 1. After being filtered by the air source, the gas is then processed by the vortex cooler and delivered to the crosshead thrust seat through the air pipe and air pipe connector. The cooling gas fills the sealed cavity where the crosshead thrust seat and the ball nut are joined, and the cooling gas covers the outer surface of the ball nut. The cooling gas carries the heat of the ball nut and is discharged through the exhaust pipe and silencer at the bottom of the crosshead thrust seat. The continuous flow of cooling gas carries away the heat of the ball nut, improving the heat dissipation effect of the ball nut and increasing the mold closing speed of the injection molding machine.

[0014] 2. The temperature of the ball nut is monitored in real time by contacting the surface of the ball nut with a temperature sensor. When the temperature sensor detects that the surface temperature of the ball nut reaches the preset upper limit of the working temperature of the vortex cooler, it will send a signal to the control system to control the vortex cooler to start working; when the temperature sensor detects that the surface temperature of the ball nut reaches the set lower limit of the working temperature of the vortex cooler, the control system will control the vortex cooler to stop working. Attached Figure Description

[0015] Figure 1 This is a usage state diagram of an embodiment of the present utility model;

[0016] Figure 2 This is a three-dimensional structural diagram of an embodiment of the present utility model;

[0017] Figure 3 This is a cross-sectional perspective view of the three-dimensional structure of an embodiment of the present utility model.

[0018] Figure 4 This is an enlarged structural diagram of point A in an embodiment of this utility model.

[0019] In the diagram: 1. Ball screw; 2. Ball nut; 3. Crosshead thrust seat; 4. Air guide assembly; 41. Cooling tank; 42. Intake pipe; 43. Air pipe connector; 44. Exhaust pipe; 45. Muffler; 5. Cooling assembly; 51. Vortex cooler; 52. Air pipe; 6. Mounting slot; 7. O-ring; 8. Temperature sensor socket; 9. Temperature sensor probe; 10. Plug. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figures 1 to 4 This utility model provides a cooling device for ball screws in all-electric injection molding machines, including a ball screw 1. One end of the ball screw 1 is threadedly connected to a ball nut 2. A crosshead thrust seat 3 is externally connected to the ball nut 2. A flow guide component 4 is provided in the middle of the crosshead thrust seat 3. A cooling component 5 is provided on one side of the crosshead thrust seat 3. The output end of the cooling component 5 is connected to the flow guide component 4 through a pipe. The system controls the operation of the vortex cooler 51 in the cooling component 5, thereby guiding the cooling gas through the air pipe 52 and the air pipe connector 43 to the cooling flow guide component 4 of the crosshead thrust seat 3. The cooling gas carries away the heat of the ball nut 2 through the flow guide component 4, improving the heat dissipation effect of the ball nut 2 when the injection molding machine is clamped, and preventing the ball nut 2 from overheating and being damaged during clamping.

[0022] like Figure 3 and Figure 4 As shown, specifically, the flow guiding assembly 4 includes a cooling groove 41 annularly formed on the inner wall of the crosshead thrust seat 3. An air inlet pipe 42 is provided at the top of the crosshead thrust seat 3, connecting to the cooling groove 41. An air pipe connector 43 is connected to the end of the air inlet pipe 42. An exhaust pipe 44 is provided at the bottom of the crosshead thrust seat 3, connecting to the cooling groove 41. A silencer 45 is connected to the end of the exhaust pipe 44. The air pipe connector 43 is connected to the output end of the vortex cooler 51 through the air pipe 52, so that when the vortex cooler 51 is working, the cooling gas is guided into the air inlet pipe 42 through the cooperation of the air pipe 52 and the air pipe connector 43, and then guided into the cavity formed by the cooling groove 41. The cooling gas is discharged from the inside of the crosshead thrust seat 3 through the exhaust pipe 44 and the silencer 45, thereby removing the heat of the ball nut 2, improving the heat dissipation effect of the ball nut 2, and increasing the mold closing speed of the injection molding machine.

[0023] Specifically, by installing a muffler 45 at the end of the exhaust pipe 44, noise pollution from cooling gas emissions is reduced, thereby protecting the environment and the hearing of operators.

[0024] Specifically, the cooling assembly 5 includes a vortex cooler 51 provided on one side of the crosshead thrust seat 3. The output end of the vortex cooler 51 is connected to the air pipe connector 43 through the air pipe 52. During the operation of the vortex cooler 51, the cooling gas is guided to the air inlet pipe 42 of the crosshead thrust seat 3 through the air pipe 52, thereby cooling the ball nut 2.

[0025] Specifically, the cooling component 5 can be replaced with a water cooling device, which drives the cooling water to circulate along the guide component 4 through a water pump, thereby carrying away the heat generated when the ball nut 2 is locked.

[0026] Specifically, the crosshead thrust seat 3 is symmetrically provided with mounting grooves 6 on the side of the cooling groove 41. An O-ring 7 is fitted inside the mounting groove 6. By opening mounting grooves 6 on both sides of the cooling groove 41 and installing O-rings 7, the cooling groove 41 is sealed after the ball nut 2 is installed in the middle of the crosshead thrust seat 3. This allows the cold air entering the crosshead thrust seat 3 to fill the cooling groove 41 and cool the ball nut 2.

[0027] like Figure 2 As shown, specifically, the outer wall of the crosshead thrust seat 3 is provided with a temperature sensing socket 8, and a temperature sensing probe 9 that fits against the surface of the ball nut 2 is inserted into the end of the temperature sensing socket 8. By connecting the temperature sensing probe 9 to the temperature sensing socket 8, the temperature sensing probe 9 can monitor the temperature of the ball nut 2 in real time. When the temperature sensing probe 9 detects that the surface temperature of the ball nut 2 reaches the preset upper limit of the working temperature of the vortex cooler 51, it will send a signal to the control system to control the vortex cooler 51 to start working; when the temperature sensing probe 9 detects that the surface temperature of the ball nut 2 reaches the set lower limit of the working temperature of the vortex cooler 51, the control system will control the vortex cooler 51 to stop working.

[0028] Specifically, after the ball nut 2 is installed in the middle of the crosshead thrust seat 3, the cooling groove 41 forms a sealed cavity. By setting the cooling groove 41, after the ball nut 2 is installed with the crosshead thrust seat 3, the cooling groove 41 forms a sealed cavity, which allows the vortex cooler to guide the cooling gas into the cavity to cool down the ball nut 2.

[0029] Specifically, the intake pipe 42 is provided with several plugs 10, which facilitates the processing of the intake pipe 42, connects the intake pipe 42 to the cooling tank 41, and seals the excess ends of the intake pipe 42 with several plugs 10 to prevent cooling gas from leaking out from the excess ends of the intake pipe 42, thereby improving the reliability of cooling the ball nut 2.

[0030] The working principle of this utility model is as follows: When in use, by controlling the operation of the vortex cooler 51, the cooling gas is guided through the air pipe 52 and the air pipe connector 43 to the air inlet pipe 42 of the crosshead thrust seat 3. The cooling gas is then guided through the air inlet pipe 42 to the sealed cavity formed by the cooling tank 41, and discharged from the inside of the crosshead thrust seat 3 through the exhaust pipe 44 and the silencer 45. This removes the heat from the ball nut 2, improves the heat dissipation effect of the ball nut 2 when the injection molding machine is clamping the mold, and prevents the ball nut 2 from overheating and being damaged.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A cooling device for a ball screw in an all-electric injection molding machine, comprising a ball screw (1), characterized in that: One end of the ball screw (1) is threadedly connected to a ball nut (2), and the ball nut (2) is externally connected to a crosshead thrust seat (3). The crosshead thrust seat (3) is provided with a flow guide component (4) in the middle, and a cooling component (5) is provided on one side of the crosshead thrust seat (3). The output end of the cooling component (5) is connected to the flow guide component (4) through a pipe.

2. The cooling device for ball screws in an all-electric injection molding machine according to claim 1, characterized in that: The flow guiding assembly (4) includes a cooling groove (41) annularly opened on the inner wall of the crosshead thrust seat (3). An air intake pipe (42) is opened at the top of the crosshead thrust seat (3) and connected to the cooling groove (41). An air pipe connector (43) is connected to the end of the air intake pipe (42). An exhaust pipe (44) is opened at the bottom of the crosshead thrust seat (3) and connected to the cooling groove (41). A muffler (45) is connected to the end of the exhaust pipe (44).

3. The cooling device for ball screws in an all-electric injection molding machine according to claim 2, characterized in that: The cooling assembly (5) includes a vortex cooler (51) provided on one side of the crosshead thrust seat (3), and the output end of the vortex cooler (51) is connected to the air pipe connector (43) through an air pipe (52).

4. A cooling device for ball screws in an all-electric injection molding machine according to claim 2, characterized in that: The crosshead thrust seat (3) is symmetrically provided with mounting slots (6) on the side of the cooling tank (41), and an O-ring (7) is fitted inside the mounting slot (6).

5. A cooling device for ball screws in an all-electric injection molding machine according to claim 1, characterized in that: The outer wall of the crosshead thrust seat (3) is provided with a temperature sensing socket (8), and the end of the temperature sensing socket (8) is provided with a temperature sensing probe (9) that fits against the surface of the ball nut (2).

6. A cooling device for ball screws in an all-electric injection molding machine according to claim 2, characterized in that: After the ball nut (2) is installed in the middle of the crosshead thrust seat (3), the cooling groove (41) is formed into a sealed cavity.

7. A cooling device for ball screws in an all-electric injection molding machine according to claim 2, characterized in that: The intake pipe (42) is provided with several plugs (10).

Images