Low-temperature wax injection machine

Abstract

The utility model relates to a low-temperature wax injection machine, which comprises an upper mold and a lower mold which can move in opposite directions, and a material injection pipe for injecting materials into a cavity formed inside the upper mold and the lower mold when the upper mold and the lower mold are closed, and further comprises a cooling box for injecting cooling liquid into the lower mold, and one end of the cooling box is connected with one end of the lower mold through a liquid outlet pipe; and a cooling liquid flowing part is arranged in the cooling box, the cooling liquid flowing part is arranged at the end, close to the liquid return pipe, in the cooling box, and the cooling liquid flowing part is used for driving cooling liquid in the cooling box to one side of the liquid outlet pipe from one side of the liquid return pipe. The cooling device has the beneficial effects that the cooling box, the liquid outlet pipe, the liquid return pipe and the cooling liquid flowing piece are arranged, so that the circulating flow of cooling liquid between the cooling box and the lower die can be effectively realized, and the cooling efficiency of the lower die is improved.

Description

Technical Field

[0001] This utility model relates to a casting equipment, and more particularly to a low-temperature wax injection machine. Background Technology

[0002] In existing technologies, low-temperature wax injection machines are widely used in the precision casting field, especially in the production of wax models with complex shapes. The process typically involves injecting liquid wax into a mold and then rapidly solidifying it using a cooling device. During operation, the upper and lower molds close to form a cavity, and the liquid wax is injected into the cavity through a connecting pipe. The wax is then cooled by a cooling assembly to accelerate solidification. After cooling, the mold is opened, the formed wax model is removed, and the cycle begins. This equipment significantly improves production efficiency and ensures the accuracy of the wax models, thus it is widely adopted.

[0003] Chinese patent document CN221819421U discloses a fully automatic low-temperature wax injection machine, which includes a frame, a lower mold, a cylinder, a connecting plate, an upper mold, a connecting pipe, and a cooling component. The lower mold is fixed to the frame, the cylinder is fixed to the top of the frame, the connecting plate is slidably connected to the frame, the telescopic rod of the cylinder is fixed to the top of the connecting plate, the upper mold is fixed to the bottom of the connecting plate, a connecting pipe is provided on the upper mold, and a cooling component is provided in the lower mold for rapidly cooling the injected liquid wax.

[0004] However, existing low-temperature wax injection machines have significant drawbacks. For example, the lack of a coolant flow device within the cooling tank causes heat to accumulate at the inlet after the coolant re-enters the tank, hindering even heat dissipation. This not only reduces cooling efficiency but can also lead to coolant performance degradation or even failure due to localized overheating, thus affecting the molding quality of the wax mold. Furthermore, heat accumulation can cause equipment instability or increased energy consumption, and long-term use may damage the cooling system, increasing maintenance costs and production risks. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a low-temperature wax injection machine that improves the efficiency of coolant use.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a low-temperature wax injection machine, comprising an upper mold and a lower mold that can move toward each other, and an injection pipe for injecting material into the cavity formed inside the upper and lower molds when they are closed, and a cooling tank for injecting coolant into the lower mold. One end of the cooling tank is connected to one end of the lower mold through an outlet pipe, and the other end is connected to one end of the lower mold through a return pipe. A coolant flow element is provided inside the cooling tank. The coolant flow element is located inside the cooling tank near the return pipe and is used to drive the coolant in the cooling tank from the return pipe side to the outlet pipe side.

[0007] The beneficial effects of this invention are as follows: By incorporating a cooling tank, an outlet pipe, a return pipe, and a coolant flow component, the coolant can effectively circulate between the cooling tank and the lower mold, thereby improving the cooling efficiency of the lower mold. The coolant flow component allows the coolant to flow directionally within the cooling tank, preventing a decrease in cooling efficiency due to coolant stagnation. Furthermore, this structure is simple, reliable, and easy to maintain, reducing equipment operating costs. As a preferred embodiment, the coolant flow component can employ a mechanical impeller structure, driven by a motor to further enhance the flow performance of the coolant and ensure long-term stable operation of the cooling system.

[0008] Furthermore, the coolant flow element is a drive fan, and the coolant flow element is disposed on the end face of the coolant tank where a return pipe connection port is provided, with the center of the coolant flow element coinciding with the center of the return pipe connection port.

[0009] By designing the coolant flow component as a drive fan and placing it inside the cooling tank near the return pipe, not only can the coolant flow within the cooling tank be driven, but a negative pressure can also be created at the return pipe, thereby promoting the return flow of coolant inside the lower mold. This design fully utilizes fluid mechanics principles, reduces the need for additional power units, and simplifies the system structure. Furthermore, the alignment of the drive fan with the return pipe connection center ensures more uniform coolant flow, avoiding localized insufficient cooling. As a preferred approach, the blade angle of the drive fan can be adjusted according to actual needs to adapt to different flow rate and pressure requirements, thereby further optimizing the cooling effect.

[0010] Furthermore, the bottom of the cooling tank is provided with an injection pipe and a suction pipe that are connected to the outside. The injection pipe is used to inject coolant into the cooling tank, and the suction pipe is used to extract coolant from the cooling tank. The injection pipe and the suction pipe work periodically to refresh the coolant in the cooling tank.

[0011] By installing injection and extraction pipes at the bottom of the cooling tank and operating them periodically, the coolant can be regularly renewed, preventing cooling performance from being affected by coolant aging or contamination. This design not only improves the reliability of the cooling system but also extends the coolant's lifespan and reduces maintenance costs. Furthermore, the periodic operation of the injection and extraction pipes can be achieved using a simple timing device, making operation convenient and easy to control. As a preferred approach, the injection and extraction pipes can be connected to an external coolant storage tank and a waste coolant recovery tank, respectively, with an automated pumping system handling coolant injection and extraction, further enhancing the system's intelligence.

[0012] Furthermore, a temperature sensor is installed inside the cooling box, and both the injection pipe and the extraction pipe are equipped with solenoid valves that are controlled by the control system to open and close the internal flow channels of the pipes. The temperature sensor is used to transmit signals to the control system to control the opening and closing of the solenoid valves in the injection pipe and the extraction pipe.

[0013] By installing a temperature sensor inside the cooling tank, combined with solenoid valves and a control system in the injection and extraction pipes, the entire coolant replacement process can be automated. When the temperature sensor detects that the coolant temperature exceeds a set threshold, the control system automatically opens the solenoid valves in the injection and extraction pipes to complete the coolant replacement operation, thus ensuring the efficient operation of the cooling system. This design not only improves the system's response speed but also reduces the need for manual intervention and lowers the possibility of operational errors. As a preferred approach, the control system can integrate a display module to show the coolant temperature and solenoid valve status in real time, facilitating user monitoring and adjustment of system parameters.

[0014] Furthermore, two sets of outlet pipes and return pipes are provided respectively, and serpentine flow channels are provided in the lower mold corresponding to the number of outlet pipes and return pipes, which are respectively connected to the two. The upper end of the serpentine flow channel is set close to the contact surface between the upper mold and the lower mold.

[0015] By setting up two sets of outlet and return pipes and designing corresponding serpentine flow channels within the lower mold, the flow path and time of the coolant within the lower mold can be significantly increased, thereby improving cooling efficiency. The design of the serpentine flow channels close to the contact surfaces of the upper and lower molds allows the coolant to reach closer to the high-temperature areas of the mold, further enhancing the cooling effect. Furthermore, the design of multiple sets of pipes enhances system redundancy; even if one set of pipes fails, the others can continue to operate, ensuring system stability. As a preferred approach, the cross-sectional shape of the serpentine flow channels can be designed as rectangular or trapezoidal to optimize the flow characteristics of the coolant, reduce flow resistance, and improve cooling uniformity. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of the cooling box according to an embodiment of the present utility model;

[0018] Figure 3 This is a schematic diagram of the distribution of the serpentine flow channels inside the lower mold in an embodiment of this utility model. Detailed Implementation

[0019] This utility model embodiment provides a low-temperature wax injection machine, such as... Figure 1-3As shown: The system includes an upper mold 1 and a lower mold 2, which can be brought close together to complete the mold closing operation. After the upper and lower molds are closed, an internal cavity is formed. An injection pipe (not shown in the figure) for injecting low-temperature wax is connected to this cavity to inject the molten wax. To ensure rapid cooling and molding of the molten wax within the mold, a cooling system is also designed. The cooling tank 3 is the core component of the cooling system. It is connected to the lower mold 2 via an outlet pipe 31 and a return pipe 32, forming a circulation loop. A coolant flow element 33 is provided at one end of the cooling tank 3 near the return pipe 32. Its function is to push the coolant from the return pipe 32 side to the outlet pipe 31 side, ensuring more efficient coolant flow.

[0020] The coolant flow component 33 is specifically a drive fan, installed on the end face of the coolant tank 3 with a return pipe connection port, and the center of the drive fan coincides with the center of the return pipe 32 connection port. This design effectively utilizes the fan's power to ensure uniform coolant flow within the coolant tank 3, preventing localized overheating or uneven cooling. Furthermore, the bottom of the coolant tank 3 is equipped with an injection pipe 34 and an extraction pipe 35, used for injecting fresh coolant into the coolant tank 3 and extracting used coolant, respectively. The injection pipe 34 and extraction pipe 35 operate periodically, continuously replenishing the coolant within the coolant tank 3 to ensure optimal cooling performance at all times.

[0021] To further optimize the cooling system's performance, a temperature sensor 36 is installed inside the cooling tank 3 to monitor the coolant temperature in real time. Solenoid valves 37 are installed in the injection pipe 34 and the extraction pipe 35, respectively, and their opening and closing are controlled by the control system. When the temperature sensor 36 detects that the coolant temperature exceeds the set value, it sends a signal to the control system, which then opens the solenoid valves 37 in the injection pipe 34 and the extraction pipe 35 to replace the coolant. This automated control method not only improves the equipment's intelligence level but also significantly enhances cooling efficiency.

[0022] In the specific coolant flow path design, two sets of outlet pipes 31 and return pipes 32 are respectively provided and connected to the serpentine channel 21 in the lower mold 2. The design of the serpentine channel 21 allows the coolant to flow in a meandering manner within the lower mold 2, thereby more fully absorbing the heat within the mold. The upper end of the serpentine channel 21 is located close to the contact surface between the upper mold 1 and the lower mold 2, which can better cool the wax inside the mold and ensure that the wax solidifies and forms a shape quickly.

[0023] The working principle of this low-temperature wax injection machine is as follows: First, the upper mold 1 and lower mold 2 approach each other to complete mold closing, and the injection pipe (not specifically marked in the figure) injects low-temperature wax into the mold cavity. Simultaneously, the cooling system starts working. The coolant in the cooling tank 3, driven by the fan (coolant flow component 33), is pushed from the return pipe 32 to the outlet pipe 31, entering the serpentine channel 21 within the lower mold 2. The design of the serpentine channel 21 allows the coolant to evenly absorb heat from the mold, thereby rapidly reducing the temperature of the wax. When the temperature sensor 36 detects an increase in coolant temperature, it triggers the control system to open the solenoid valves 37 in the injection pipe 34 and the extraction pipe 35, injecting fresh coolant and discharging old coolant, thus maintaining optimal cooling capacity of the coolant. Throughout the process, the flow, renewal, and temperature monitoring of the coolant are all completed by an automated system, greatly improving the equipment's efficiency and product quality.

[0024] The above embodiments are merely one preferred embodiment of the present utility model. Ordinary changes and substitutions made by those skilled in the art within the scope of the present utility model's technical solution are all included within the protection scope of the present utility model.

Claims

1. A low-temperature wax injection machine, comprising an upper mold and a lower mold that can move towards each other, and an injection pipe for injecting wax into the cavity formed inside the upper and lower molds when they are closed, further comprising a cooling tank for injecting coolant into the lower mold, one end of the cooling tank being connected to one end of the lower mold via an outlet pipe, and the other end being connected to one end of the lower mold via a return pipe, characterized in that: The cooling tank is equipped with a coolant flow element, which is located at one end of the cooling tank near the return pipe and is used to drive the coolant in the cooling tank from the return pipe side to the outlet pipe side.

2. The low-temperature wax injection machine according to claim 1, characterized in that: The coolant flow element is a drive fan. The coolant flow element is located on the end face of the cooling tank where a return pipe connection port is provided. The center of the coolant flow element coincides with the center of the return pipe connection port.

3. The low-temperature wax injection machine according to claim 2, characterized in that: The bottom of the cooling tank is equipped with an injection pipe and a suction pipe that are connected to the outside. The injection pipe is used to inject coolant into the cooling tank, and the suction pipe is used to extract coolant from the cooling tank. The injection pipe and the suction pipe work periodically to refresh the coolant in the cooling tank.

4. The low-temperature wax injection machine according to claim 3, characterized in that: The cooling box is equipped with a temperature sensor, and both the injection pipe and the extraction pipe are equipped with solenoid valves that are controlled by the control system to open and close the flow channels inside the pipes. The temperature sensor is used to transmit signals to the control system to control the opening and closing of the solenoid valves in the injection pipe and the extraction pipe.

5. The low-temperature wax injection machine according to claim 2, characterized in that: Two sets of outlet pipes and return pipes are provided respectively. The lower mold is provided with serpentine flow channels that are connected to the outlet pipes and return pipes respectively. The upper end of the serpentine flow channel is set close to the contact surface between the upper mold and the lower mold.

Images