Lost foam mold feeding structure

Abstract

The utility model discloses an evanescent mode mold feeding structure, which relates to the technical field of evanescent mode mold feeding and comprises a feeding cylinder, a first fixing frame is fixedly connected to the outer surface of the lower portion of the feeding cylinder, a vacuum pump is mounted on the upper surface of the first fixing frame, and the output end of the vacuum pump is arranged in the feeding cylinder. A vertical column is fixedly connected to the upper surface of the second fixing frame, a groove is formed in the inner side face of the vertical column, a sliding block is slidably connected to the surface of the groove, a lifting plate is fixedly connected to the surface of the sliding block, a piston rod is fixedly connected to the lower surface of the lifting plate, and a metal piston is slidably connected to the inner surface of the feeding cylinder. The end, away from the lifting plate, of the piston rod is fixedly connected with the upper surface of the metal piston, the left side of the feeding barrel is connected with a discharging pipe, and a second electromagnetic valve is installed on the surface of the discharging pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of lost foam mold feeding, in particular to a lost foam mold feeding structure. Background Art

[0002] Lost foam casting, also known as full-mold casting, is a new casting method. Its basic principle is to use wax or foam patterns of similar size and shape to the casting. These are bonded together into a cluster, coated with a refractory coating, dried, and then embedded in dry quartz sand for vibration molding. Molten metal is poured under negative pressure, vaporizing the pattern. The liquid metal then takes over the pattern and solidifies and cools to form the casting. This method eliminates the need to remove the mold, significantly improving casting design freedom and surface finish and dimensional accuracy. Lost foam casting is particularly suitable for producing complex shapes such as aluminum alloys, copper alloys, cast iron, and steel castings other than mild steel, with mechanical properties comparable to those of sand casting. Advantages of lost foam casting include using a vaporized mold, eliminating the need for a draft, parting surface, or core, resulting in castings with dimensional accuracy and surface finish similar to those of investment casting. Furthermore, this method reduces assembly time and costs, simplifies the molding process, shortens production cycles, and improves productivity.

[0003] Publication specification of utility model patent application in China CN216729412U A lost foam mold feeding structure disclosed in the document, although the utility model can not only complete fast feeding to prevent material blockage and fill the mold cavity, but also smoothly discharge gas from the mold cavity and maintain a relatively stable air pressure in the mold cavity, but during use, it is necessary to create a negative pressure environment for the inner cavity of the mold. Under the negative pressure environment, the molten plastic can be quickly injected into the mold. However, when used on a mass production line, it takes time for the mold to cool down, and after the mold is taken out, the mold needs to be vacuumed, the working time is long, and there is a disadvantage of low work efficiency. In order to improve work efficiency, a lost foam mold feeding structure is urgently needed. Utility Model Content

[0004] (1) Technical problems solved

[0005] In view of the deficiencies in the prior art, the present invention provides a lost foam mold feeding structure, which solves the problems raised in the above background technology.

[0006] (2) Technical solution

[0007] To achieve the above objectives, the utility model is implemented through the following technical solutions: a lost foam mold feeding structure, including a feed barrel, the outer surface of the lower part of the feed barrel is fixedly connected to a first fixing frame, the upper surface of the first fixing frame is installed with a vacuum pump, the output end of the vacuum pump is arranged in the feed barrel, the outer surface of the upper part of the feed barrel is fixedly connected to a second fixing frame, the upper surface of the second fixing frame is fixedly connected to a column, the inner side surface of the column is provided with a groove, the surface of the groove is slidably connected to a slider, the surface of the slider is fixedly connected to a lifting plate, the lower surface of the lifting plate is fixedly connected to a piston rod, the inner surface of the feed barrel is slidably connected to a metal piston, the end of the piston rod away from the lifting plate is fixedly connected to the upper surface of the metal piston, the left side of the feed barrel is connected to a discharge pipe, and the surface of the discharge pipe is installed with a second solenoid valve.

[0008] Optionally, a heater is installed on the outer surface of the middle part of the feed barrel, and a heating wire is installed inside the feed barrel, and the heater is electrically connected to the heating wire through a wire.

[0009] Optionally, a servo motor is installed on the upper surface of the column, the output end of the servo motor is fixedly connected to a reciprocating screw, bearings are provided at the connection between the two ends of the reciprocating screw and the groove, and a slider is threadedly connected to the surface of the reciprocating screw.

[0010] Optionally, a feed pipe is fixedly connected to the lower surface of the feed barrel, a three-way solenoid valve is installed on the surface of the feed pipe, an air intake pipe is installed on the left side of the three-way solenoid valve, and a connector is connected to the lower end of the feed pipe.

[0011] Optionally, one end of the discharge pipe is arranged to pass through the feed barrel, and the passing end is arranged in the feed barrel, and the other end of the discharge pipe is connected to the raw material box.

[0012] Optionally, the piston rod is slidably connected to the top surface of the feed cylinder.

[0013] The utility model provides a lost foam mold feeding structure, which has the following beneficial effects:

[0014] 1. This lost foam mold feeding structure has the effect of improving work efficiency through the arrangement of a feeding cylinder, a vacuum pump, a piston rod and a metal piston. When in use, the upper end of the discharge pipe is connected to the material tank filled with molten raw materials, and the feed pipe is connected to the injection hole of the mold through a connector. An air outlet is reserved on the mold. The three-way solenoid valve and the second solenoid valve are closed. Under the action of the vacuum pump, the feed cylinder is vacuumed, and then the second solenoid valve is opened. Since the feed cylinder is under negative pressure, the molten raw material fills the feed cylinder through the discharge pipe, and the third solenoid valve is closed. The second solenoid valve opens the three-way solenoid valve to connect the feed pipe with the connector, and at the same time turns on the servo motor, which drives the reciprocating screw to rotate, causing the slider connected to the threaded surface of the reciprocating screw to slide downward in the groove, and at the same time drives the lifting plate and the piston rod to move downward together, thereby causing the metal piston at the lower end of the piston rod to slide downward in the feed barrel. As the metal piston moves downward, the raw material in the feed barrel is squeezed into the inner cavity of the mold through the feed pipe, and the air in the mold is discharged through the air holes opened on the mold, thereby quickly pressing the molten raw material into the inner cavity of the mold, and the mold During the cooling process, the valve plate of the three-way solenoid valve is controlled to rotate to connect the feed pipe and the air inlet pipe. At this time, the servo motor is controlled to continue working, driving the slider to move upward in the groove, thereby making the metal piston slide upward on the inner surface of the feed barrel. The outside air enters the feed barrel through the air inlet pipe and the feed pipe. By controlling the position of the metal piston, the required mold dosage can also be changed. After the metal piston moves to the corresponding position, the three-way solenoid valve is closed. At this time, under the action of the vacuum pump, the feed barrel is vacuumed again. If the mold has not been cooled completely, the heater is turned on. When the current flows in the heating wire, the resistance will hinder the movement of electrons, causing the electrons to collide with metal atoms, thereby converting their kinetic energy into heat energy, causing the heating wire to heat up, and then keep the molten raw material in the feed barrel warm. When the mold is cooled, the same steps are repeated to cool the mold while storing the molten material in the feed barrel. During injection molding, the molten raw material can be quickly pressed into the mold cavity, saving the time required for the vacuum process, reducing the working time, and achieving the purpose of improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the front section of the utility model;

[0017] Figure 3 For this utility model Figure 2 Schematic diagram of the structure at A in the middle;

[0018] Figure 4 For this utility model Figure 2Schematic diagram of the structure at point B.

[0019] In the figure: 1. Feed barrel; 2. First fixed frame; 3. Vacuum pump; 4. Feed pipe; 41. Air inlet pipe; 5. Three-way solenoid valve; 6. Connector; 7. Heater; 8. Heating wire; 9. Second fixed frame; 10. Column; 11. Groove; 12. Servo motor; 13. Reciprocating screw; 14. Slider; 15. Lifting plate; 16. Piston rod; 17. Metal piston; 18. Discharge pipe; 19. Second solenoid valve. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] Example 1

[0022] See also Figures 1 to 4 The utility model provides a technical solution: a feeding structure of an lost foam mold, comprising a feeding barrel 1, a first fixing frame 2 being fixedly connected to the outer surface of the lower portion of the feeding barrel 1, a vacuum pump 3 being installed on the upper surface of the first fixing frame 2, an output end of the vacuum pump 3 being arranged in the feeding barrel 1, a heater 7 being installed on the outer surface of the middle portion of the feeding barrel 1, a heating wire 8 being installed inside the feeding barrel 1, the heater 7 being electrically connected to the heating wire 8 through a wire, a second fixing frame 9 being fixedly connected to the outer surface of the upper portion of the feeding barrel 1, a column 10 being fixedly connected to the upper surface of the second fixing frame 9, a groove 11 being provided on the inner side surface of the column 10, a slider 14 being slidably connected to the surface of the groove 11, a servo motor 12 being installed on the upper surface of the column 10, a reciprocating screw 13 being fixedly connected to the output end of the servo motor 12, bearings being provided at the connection between the two ends of the reciprocating screw 13 and the groove 11. The surface of the reciprocating screw 13 is threadedly connected to a slider 14, and the surface of the slider 14 is fixedly connected to a lifting plate 15, and the lower surface of the lifting plate 15 is fixedly connected to a piston rod 16. The inner surface of the feed barrel 1 is slidably connected to a metal piston 17, and the end of the piston rod 16 away from the lifting plate 15 is fixedly connected to the upper surface of the metal piston 17. The left side of the feed barrel 1 is connected to a discharge pipe 18, and a second solenoid valve 19 is installed on the surface of the discharge pipe 18. The lower surface of the feed barrel 1 is fixedly connected to the feed pipe 4, and a three-way solenoid valve 5 is installed on the surface of the feed pipe 4. The air intake pipe 41 is installed on the left side of the three-way solenoid valve 5, and the lower port of the feed pipe 4 is connected to a connector 6. One end of the discharge pipe 18 is arranged to pass through the feed barrel 1, and the penetrating end is arranged in the feed barrel 1. The other end of the discharge pipe 18 is connected to the raw material box, and the piston rod 16 is slidably connected to the top surface of the feed barrel 1.

[0023] In order to achieve the purpose of improving work efficiency, when in use, the feeding structure of the lost foam mold is provided with the effect of improving work efficiency through the arrangement of the feeding cylinder 1, the vacuum pump 3, the piston rod 16 and the metal piston 17. When in use, the upper end of the discharge pipe 18 is connected to the material tank filled with molten raw materials, the feeding pipe 4 is connected to the injection hole of the mold through the connector 6, and the air outlet is reserved on the mold. The three-way solenoid valve 5 and the second solenoid valve 19 are closed. Under the action of the vacuum pump 3, the feeding cylinder 1 is vacuumed, and then the second solenoid valve 19 is opened. Since the feeding cylinder 1 is under negative pressure, the molten raw material fills the feeding cylinder 1 through the discharge pipe 18. Close the second solenoid valve 19, open the three-way solenoid valve 5, connect the feed pipe 4 with the connector 6, and turn on the servo motor 12 at the same time. The servo motor 12 drives the reciprocating screw 13 to rotate, so that the slider 14 threaded on the surface of the reciprocating screw 13 slides downward in the groove 11, and at the same time drives the lifting plate 15 and the piston rod 16 to move downward together, thereby causing the metal piston 17 at the lower end of the piston rod 16 to slide downward in the feed barrel 1. As the metal piston 17 moves downward, the raw material in the feed barrel 1 is squeezed into the inner cavity of the mold through the feed pipe 4, and the air in the mold is discharged through the air holes opened on the mold, thereby causing the molten raw material to be quickly discharged. The metal piston 17 is pressed into the inner cavity of the mold. When the mold is cooling, the valve plate of the three-way solenoid valve 5 is controlled to rotate to connect the feed pipe 4 and the air inlet pipe 41. At this time, the servo motor 12 is controlled to continue working to drive the slider 14 to move upward in the groove 11, thereby making the metal piston 17 slide upward on the inner surface of the feed barrel 1. The outside air enters the feed barrel 1 through the air inlet pipe 41 and the feed pipe 4. By controlling the position of the metal piston 17, the required mold dosage can also be changed. After the metal piston 17 moves to the corresponding position, the three-way solenoid valve 5 is closed. At this time, under the action of the vacuum pump 3, the feed barrel 1 is vacuumed again. If the mold has not been cooled down, turn on the heater 7 and the heating wire 8. When the current flows in the heating wire 8, the resistance will hinder the movement of electrons, causing the electrons to collide with metal atoms, thereby converting their kinetic energy into heat energy, causing the heating wire 8 to heat up, and then keep the molten raw material in the feed barrel 1 warm. When the mold is cooled down, the same steps are repeated to cool the mold while storing the molten raw material in the feed barrel 1. During injection molding, the molten raw material can be quickly pressed into the mold cavity, saving the time required for the vacuum process, reducing the working time, and achieving the purpose of improving work efficiency.

[0024] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A feeding structure for an evaporative foam mold, comprising a feeding cylinder (1), characterized in that: The outer surface of the lower part of the feeding barrel (1) is fixedly connected to a first fixing frame (2), the upper surface of the first fixing frame (2) is installed with a vacuum pump (3), the output end of the vacuum pump (3) is arranged in the feeding barrel (1), the outer surface of the upper part of the feeding barrel (1) is fixedly connected to a second fixing frame (9), the upper surface of the second fixing frame (9) is fixedly connected to a column (10), the inner side surface of the column (10) is provided with a groove (11), the surface of the groove (11) is slidably connected to a slider (14), the surface of the slider (14) is fixedly connected to a lifting plate (15), the lower surface of the lifting plate (15) is fixedly connected to a piston rod (16), the inner surface of the feeding barrel (1) is slidably connected to a metal piston (17), the end of the piston rod (16) away from the lifting plate (15) is fixedly connected to the upper surface of the metal piston (17), the left side of the feeding barrel (1) is connected to a discharge pipe (18), and the surface of the discharge pipe (18) is installed with a second solenoid valve (19).

2. The lost foam mold feeding structure according to claim 1, characterized in that: A heater (7) is installed on the outer surface of the middle portion of the feed barrel (1), and a heating wire (8) is installed inside the feed barrel (1). The heater (7) is electrically connected to the heating wire (8) via a wire.

3. The lost foam mold feeding structure according to claim 1, characterized in that: A servo motor (12) is mounted on the upper surface of the column (10); a reciprocating screw (13) is fixedly connected to the output end of the servo motor (12); bearings are provided at the connection points between the two ends of the reciprocating screw (13) and the groove (11); and a slider (14) is threadedly connected to the surface of the reciprocating screw (13).

4. The lost foam mold feeding structure according to claim 1, characterized in that: A feed pipe (4) is fixedly connected to the lower surface of the feed barrel (1); a three-way solenoid valve (5) is installed on the surface of the feed pipe (4); an air intake pipe (41) is installed on the left side of the three-way solenoid valve (5); and a connector (6) is connected to the lower end of the feed pipe (4).

5. The lost foam mold feeding structure according to claim 1, characterized in that: One end of the discharge pipe (18) is arranged to pass through the feed barrel (1), and the penetrating end is arranged in the feed barrel (1), and the other end of the discharge pipe (18) is connected to the raw material box.

6. The lost foam mold feeding structure according to claim 1, characterized in that: The piston rod (16) is slidably connected to the top surface of the feed cylinder (1).

Images