Foam production device for lost foam

Abstract

The utility model particularly relates to a foam production device for lost foam, which comprises a heating device and a screening device, the heating device comprises a heating kettle, the heating kettle is of a double-layer structure, a heating wire is wound in an interlayer of the heating kettle, the top of the heating kettle is provided with a feeding hopper and a stirring device, and the bottom of the heating kettle is provided with a vertically arranged material pipe. A waste screening device is arranged on the material pipe and comprises a first fan, an air outlet of the first fan is communicated with one side of the material pipe, a screening barrel is arranged at the bottom of the material pipe, the top of the screening barrel is of an opening structure, a first filter screen is arranged in the screening barrel, and a vibration motor is installed in the center of the bottom of the screening barrel. A plurality of buffer springs are distributed on the circumference of the bottom of the screening barrel, the bottoms of the buffer springs are connected with a base, the side portion of the screening barrel is connected with a first discharging pipe and a second discharging pipe, and the other side of the discharging pipe is connected with a qualified material screening device.

Description

Technical Field

[0001] The utility model relates to the field of lost foam equipment, and particularly relates to a foam production device for lost foam. Background Art

[0002] Lost foam casting is a new casting method, also known as full-mold casting. It uses paraffin or foam models similar in size and shape to the castings. After brushing refractory coatings and drying, they are buried in dry quartz sand and vibrated to form a mold. Molten metal is poured under negative pressure, causing the model to gasify, and the liquid metal occupies the position of the model and solidifies and cools to form the casting. This method has the advantages of accurate casting size and shape, high surface finish, simplified molding process, etc. At the same time, it reduces casting defects and waste caused by core making and core setting. The design of lost foam casting is flexible, which can eliminate many defects in traditional casting and conforms to the innovation trend of casting technology.

[0003] Lost foam casting requires the use of foam particles. The foam particles are made by heating raw materials and the action of blowing agents, causing the foam raw materials to expand into porous materials. When the foam raw materials are heated and foamed, they will stick together and become flakes, which need to be screened out during use. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the utility model provides a foam production device for lost foam.

[0005] The technical solution of the utility model is realized as follows: A foam production device for lost foam includes a heating device and a screening device. The heating device includes a heating kettle, which is of a double-layer structure. A heating wire is wound in the interlayer of the heating kettle. A feed hopper and a stirring device are arranged at the top of the heating kettle. A vertically arranged material pipe is arranged at the bottom of the heating kettle. A waste screening device is arranged on the material pipe. The screening device includes a blower one. The air outlet of the blower one is communicated with one side of the material pipe. A screening barrel is arranged at the bottom of the material pipe. The top of the screening barrel is of an open structure. A filter screen one is arranged in the screening barrel. A vibration motor is installed at the center position of the bottom of the screening barrel. A plurality of buffer springs are distributed circumferentially at the bottom of the screening barrel. The bottom of the buffer springs is connected with a base. An outlet pipe one and an outlet pipe two are respectively connected to the side part of the screening barrel. The other side of the material pipe is connected with a qualified material screening device.

[0006] The qualified material screening device includes a horizontal outlet pipe. A material box is connected to the outlet of the horizontal outlet pipe. The material box is of a cuboid cavity structure. A blower two is connected to the back plate of the material box. A vertically arranged filter screen two is installed at the middle position in the length direction of the material box.

[0007] A spiral conveyor is connected to the feed hopper and is inclined. At the bottom of the higher side of the spiral conveyor, there is a second discharge pipe, and the second discharge pipe is connected to the feed hopper. At the top of the lower side of the spiral conveyor, there is a feed hopper, and the feed hopper is connected to a raw material box for holding raw materials.

[0008] The stirring device includes a stirring motor. A vertically arranged connecting shaft is connected to the rotating shaft of the stirring motor. A number of stirring rods are vertically arranged on the connecting shaft, and the lengths of two adjacent stirring rods are different.

[0009] The first discharge pipe and the second discharge pipe are respectively located on both sides of the screening barrel and are above and below the first filter screen.

[0010] The technical solution of the present utility model has the following positive effects: The heating kettle of the present utility model is a double-layer structure, and electric heating wires are arranged in the interlayer. After the foam particles are heated and foamed, they are divided into two parts by the first fan. One part is that the first fan sends the light and qualified foam particles into the material box, and the other part of the unqualified and adhered ones fall into the screening barrel due to gravity; the unqualified particles in the qualified foam particles are screened out by the second fan, and the qualified particles in the unqualified particles are screened out by the vibration motor. Description of the Drawings

[0011] Figure 1 It is the front view of the present utility model.

[0012] Figure 2 It is the side view of the connection between the raw material box and the second fan. Detailed Embodiment

[0013] As Figure 1-2 shown, a foam production device for lost foam casting includes a heating device and a screening device. The heating device includes a heating kettle 1, the heating kettle 1 is a double-layer structure, heating wires 2 are wound in the interlayer of the heating kettle 1, a feed hopper 3 and a stirring device are arranged at the top of the heating kettle 1, a vertically arranged material pipe 4 is arranged at the bottom of the heating kettle 1, a waste screening device is arranged at the bottom of the material pipe 4, the screening device includes a first fan 5, the air outlet of the first fan 5 is communicated with one side of the material pipe 4, a screening barrel 6 is arranged at the bottom of the material pipe 4, the top of the screening barrel 6 is an open structure, a first filter screen 7 is arranged in the screening barrel 6, a vibration motor 14 is installed at the central position of the bottom of the screening barrel 6, a number of buffer springs 9 are circumferentially distributed at the bottom of the screening barrel 6, the bottom of the buffer springs 9 is connected to a base 10, the side parts of the screening barrel 6 are respectively connected with a first discharge pipe 21 and a second discharge pipe 11, and a qualified material screening device is connected to the other side of the material pipe 4.

[0014] Specifically, the raw materials are added from the feed hopper 3 into the heating kettle 1, and the heating wire heats and foams the raw materials, so that the raw materials become foam particles. The foamed foam particles come out from the bottom material pipe 4. The first blower 5 is started, and the appropriate wind speed is adjusted. The qualified foam particles will enter the qualified material screening device from the horizontal discharge pipe, while the unqualified foam particles that are heavier and stick together will enter the screening barrel 6 from the bottom of the material pipe 4 to further screen the unqualified materials. The vibration motor 14 is started, and the unqualified agglomerated foam particles will remain on the top of the first filter screen 7, and the qualified foam particles mixed in will fall through the through holes of the first filter screen 7. The unqualified materials go out from the first discharge pipe 21, and the qualified materials go out from the second discharge pipe 11.

[0015] The qualified material screening device includes a horizontal discharge pipe 19. The position of the first blower 5 is opposite to that of the horizontal discharge pipe 19. A material box 8 is connected to the discharge port of the horizontal discharge pipe 19. The material box 8 is a cuboid cavity structure. A second blower 9 is connected to the back plate of the material box 8. A vertically arranged second filter screen 15 is installed at the middle position in the length direction of the material box 8. Specifically, the qualified materials all enter the material box 8 through the first blower 5 and the horizontal discharge pipe 19. When using the qualified foam particles, the second blower 9 is started to blow the materials from the back of the material box 8 to the front of the material box 8, that is, from the back of the second filter screen 10 to the front. The qualified materials can pass through the mesh holes of the second filter screen 10, and the unqualified materials will remain at the back.

[0016] An inclined screw conveyor 12 is connected to the feed hopper 3. The bottom of the higher side of the screw conveyor 12 is connected to a second discharge pipe 13, and the second discharge pipe 13 is connected to the feed hopper 3. The top of the lower side of the screw conveyor 12 is connected to a raw material box 20, and the top of the raw material box 20 is an open structure. The bottom discharge port of the raw material box 20 is communicated with the feed port of the screw conveyor 12.

[0017] Specifically, the raw materials are poured into the raw material box 8, and the raw materials enter the feed hopper 3 through the screw conveyor 12 and the second discharge pipe 13 and finally reach the heating kettle 1 for heating and foaming the raw materials.

[0018] The stirring device includes a stirring motor 16. A vertically arranged connecting shaft 17 is connected to the rotating shaft of the stirring motor 16. The connecting shaft 17 is vertically arranged. A number of horizontally arranged stirring rods 18 are installed on the connecting shaft 17 along its height direction. The lengths of two adjacent stirring rods 18 are different. The stirring motor 16 is started to stir the raw materials in the heating kettle, so that the raw materials can be heated faster. The stirring rods 18 are arranged with different lengths, making the stirring range larger and the effect better.

[0019] The first discharge pipe 21 and the second discharge pipe 11 are respectively located on both sides of the screening barrel 6 and above and below the first filter screen 7; the diameter of the first discharge pipe 21 is larger than that of the second discharge pipe 11, and the unqualified materials go out through the first discharge pipe 21, and the qualified materials go out through the second discharge pipe 11.

Claims

1. A foam production device for lost foam casting, comprising a heating device and a screening device, characterized in that: The heating device includes a heating kettle, which has a double-layer structure. A heating wire is wound inside the interlayer of the heating kettle. A feed hopper and a stirring device are arranged at the top of the heating kettle. A vertically arranged material pipe is provided at the bottom of the heating kettle. A waste screening device is arranged on the material pipe. The screening device includes a first fan, and the air outlet of the first fan is communicated with one side of the material pipe. A screening barrel is arranged at the bottom of the material pipe. The top of the screening barrel is an open structure. A first filter screen is arranged inside the screening barrel. A vibration motor is installed at the center of the bottom of the screening barrel. A number of buffer springs are circumferentially distributed at the bottom of the screening barrel. The bottom of the buffer spring is connected to a base. An outlet pipe one and an outlet pipe two are respectively connected to the side part of the screening barrel. The other side of the material pipe is connected to a qualified material screening device.

2. The foam production device for lost foam according to claim 1, wherein: The qualified material screening device includes a horizontal outlet pipe. A material box is connected to the outlet of the horizontal outlet pipe. The material box has a cuboid cavity structure. A second fan is connected to the back plate of the material box. A vertically arranged second filter screen is installed at the middle position in the length direction of the material box.

3. The foam production device for lost foam according to claim 1, wherein: An inclined screw conveyor is connected to the feed hopper. The bottom of the higher side of the screw conveyor is connected to the outlet pipe two, and the outlet pipe two is connected to the feed hopper. The top of the lower side of the screw conveyor is provided with a feed hopper, and the feed hopper is connected to a raw material box for containing raw materials.

4. A foam production device for lost foam according to claim 1, characterized in that: The stirring device includes a stirring motor. A vertically arranged connecting shaft is connected to the rotating shaft of the stirring motor. A number of stirring rods are vertically arranged on the connecting shaft, and the lengths of two adjacent stirring rods are different.

5. A foam production device for lost foam casting according to claim 1, characterized in that: The outlet pipe one and the outlet pipe two are respectively located above and below the first filter screen.

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