Liquefying and roasting device for hollow-shell workpiece

Abstract

The utility model provides an empty shell workpiece liquefaction roasting device which comprises a compartment-shaped furnace body, a roasting conveying mechanism and a heating mechanism, wherein the roasting conveying mechanism and the heating mechanism are arranged in the compartment-shaped furnace body; a feeding port is formed in one end of the compartment-shaped furnace body, a discharging port is formed in the other end of the compartment-shaped furnace body, the heating mechanism comprises a plurality of natural gas burners and an electric heater, an isolation door is arranged in the middle of the compartment-shaped furnace body, the electric heater is installed between the isolation door and the feeding port, and the natural gas burners are installed between the isolation door and the discharging port. The empty shell workpiece liquefying and roasting device comprises an electric heating mode and a natural gas combustion heating mode, in the using process, low-temperature roasting is conducted in the electric heating mode, foam is liquefied and flows out, an empty shell is formed after low-temperature glue discharging, and then residual foam is removed through natural gas combustion heating.

Description

Technical Field

[0001] The utility model relates to a production device for shell workpieces, specifically to a liquefaction roasting device for shell workpieces. Background Art

[0002] The lost foam shell casting method uses a new type of coating with strong fire resistance. First, EPS foam is burned off by low-temperature roasting to form a cavity shell mold with very little residual carbon content, and then high-temperature molten metal is poured. Currently, most lost foam shell castings use an electric heating furnace (for example, a roasting furnace for roasting mold shells disclosed in Chinese Patent CN202254770U) to first perform low-temperature roasting and then increase the temperature for high-temperature roasting. However, in the low-temperature liquefaction process of the casting method through the roasting furnace, since there is still a small amount of foam residue in the shell during the low-temperature liquefaction of the workpiece, subsequent high-temperature roasting is required to remove the residual foam. During the high-temperature roasting process, odors are generated before the residual foam burns, increasing the difficulty of subsequent treatment; in addition, it takes a long time to reach the required temperature for high-temperature roasting using an electric heating furnace, resulting in a long production cycle and being unfavorable for improving production efficiency; if direct high-temperature treatment is carried out, thermal expansion and contraction will occur, easily damaging the workpiece.

[0003] In order to solve the above problems, people have been seeking an ideal technical solution. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and thus provide a liquefaction roasting device for shell workpieces.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A liquefaction roasting device for shell workpieces includes a box-shaped furnace body, a roasting conveying mechanism and a heating mechanism arranged inside the box-shaped furnace body; an inlet is opened at one end of the box-shaped furnace body, and an outlet is opened at the other end of the box-shaped furnace body. The heating mechanism includes a number of natural gas burners and electric heaters. An isolation door is arranged in the middle of the box-shaped furnace body. The electric heaters are installed between the isolation door and the inlet, and the natural gas burners are installed between the isolation door and the outlet.

[0007] The box-shaped furnace body is respectively provided with gantry frames corresponding to the inlet and the outlet. A lifting mechanism is arranged on the top cross beam of the gantry frame. A closing door is arranged between the two vertical supports of the gantry frame. Vertical slides are arranged on both sides of the vertical supports corresponding to the closing door. Sliders are respectively arranged on both sides of the closing door. The sliders are slidably matched with the vertical slides. The lifting mechanism drives the closing door to move up and down along the vertical slides.

[0008] The box-shaped furnace body includes a rectangular outer shell and a heat insulation layer arranged inside the rectangular outer shell. Two groups of opposite first installation grooves are arranged inside the heat insulation layer, and the two groups of first installation grooves are respectively located on both sides of the roasting conveyor mechanism. The natural gas burner is installed in this installation groove, and a natural gas delivery pipeline is arranged outside the box-shaped furnace body corresponding to the natural gas burner.

[0009] The heat insulation layer located at the bottom surface of the box-shaped furnace body is provided with a second installation groove, and the roasting conveyor mechanism is installed in this second installation groove.

[0010] The isolation door is of a rolling shutter door structure. The heat insulation layer located at the top surface of the box-shaped furnace body is provided with a third installation groove. The upper end of the isolation door is installed in the third installation groove. Third installation grooves are arranged on both sides of the third installation groove, and both ends of the third installation groove are communicated with the third installation groove to form an inverted U shape; both sides of the isolation door are clamped into the third installation groove.

[0011] Several fourth installation grooves are respectively arranged on both sides of the roasting conveyor mechanism. An air inlet is arranged inside the fourth installation groove, and the air inlet is communicated with an air delivery pipeline. Several exhaust pipelines are opened at the top of the box-shaped furnace body.

[0012] Compared with the prior art, the beneficial effects of the present utility model are that the present utility model provides a liquefaction roasting device for hollow shell workpieces, which includes two heating methods: electric heating and natural gas combustion heating. During use, close the isolation door, open the sealing door, first enter between the isolation door and the feed port and carry out low-temperature roasting in an electric heating manner, so that the foam liquefies and flows out. After low-temperature degumming, a hollow shell is formed, and the sharp rise in temperature has little impact. Then open the isolation door, enter between the isolation door and the discharge port, and after closing the isolation door, use natural gas combustion heating to remove the remaining foam. Brief Description of the Drawings

[0013] Figure 1 It is the structural schematic diagram (one) of the present utility model.

[0014] Figure 2 It is the structural schematic diagram (two) of the present utility model.

[0015] Figure 3 It is the structural schematic diagram (three) of the present utility model.

[0016] In the figure: 1. Box-shaped furnace body; 2. Feed port; 3. Discharge port; 4. Electric heater; 5. Natural gas burner; 6. Gantry; 7. Sealing door; 8. Vertical slideway; 9. Lifting mechanism; 10. Rectangular outer shell; 11. Heat insulation layer; 12. Natural gas delivery pipeline; 13. Exhaust pipeline; 14. Air inlet. Detailed Embodiment

[0017] Next, through specific embodiments, the technical solutions of the present utility model will be further described in detail.

[0018] In the description of the utility model, it should be noted that unless otherwise clearly specified and defined, terms such as "installation", "equipped with", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. "Installation", "equipped with", "connection", etc. can adopt conventional means in the prior art, such as: integral setting, snap-in installation, welded connection, adhesive connection, bolt connection, etc. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances, and suitable connection, setting or installation methods can be selected in the prior art.

[0019] As Figures 1-3 shown, a liquefaction roasting device for an empty-shell workpiece includes a box-shaped furnace body 1 and a roasting conveying mechanism and a heating mechanism arranged inside the box-shaped furnace body 1; an inlet 2 is provided at one end of the box-shaped furnace body 1, and an outlet 3 is provided at the other end of the box-shaped furnace body 1. The heating mechanism includes a plurality of natural gas burners 5 and an electric heater 4. An isolation door is arranged in the middle of the box-shaped furnace body 1. The electric heater 4 is installed between the isolation door and the inlet 2, and the natural gas burners 5 are installed between the isolation door and the outlet 3. Specifically, the roasting conveying mechanism can adopt a common conveying mechanism in the prior art, such as: a roller conveyor.

[0020] This liquefaction roasting device for an empty-shell workpiece is designed with two heating methods: electric heating and natural gas combustion heating. During use, close the isolation door, open the closing door. First, enter the area between the isolation door and the inlet and carry out low-temperature roasting by electric heating, so that the foam liquefies and flows out. After low-temperature degumming, an empty shell is formed, and the sharp rise in temperature has little impact. Then open the isolation door, enter the area between the isolation door and the outlet, close the isolation door and then use natural gas combustion heating to remove the remaining foam.

[0021] In one embodiment, gantry frames 6 are respectively arranged corresponding to the inlet 2 and the outlet 3 of the box-shaped furnace body 1. A lifting mechanism 9 is arranged on the top cross beam of the gantry frame 6. A closing door 7 is arranged between the two vertical supports of the gantry frame 6. Vertical slideways 8 are arranged on both sides of the vertical supports corresponding to the closing door 7. Sliders are respectively arranged on both sides of the closing door 7, and the sliders are slidably matched with the vertical slideways 8. The lifting mechanism 9 drives the closing door 7 to move up and down along the vertical slideways 8, which is convenient for opening and closing the closing door; specifically, the lifting mechanism can adopt a winch. A steel wire rope is wound around the drum of the winch, and the lower end of the steel wire rope is connected to the closing door. The drum is driven by a motor to rotate, so that the steel wire rope drives the closing door to lift and lower.

[0022] In one embodiment, the box-shaped furnace body 1 includes a rectangular outer shell 10 and an insulation layer 11 arranged inside the rectangular outer shell 10, and two groups of opposite first mounting grooves are arranged inside the insulation layer 11. The two groups of first mounting grooves are respectively located on both sides of the roasting conveying mechanism. The natural gas burner 5 is installed in the mounting groove, and a natural gas transmission pipeline 12 is arranged on the outside of the box-shaped furnace body 1 corresponding to the natural gas burner 5.

[0023] In one embodiment, the heat insulation layer 11 located on the bottom surface of the box-shaped furnace body 1 is provided with a second installation groove, and the roasting conveying mechanism is installed in the second installation groove.

[0024] In one embodiment, the isolation door is a rolling door structure, the heat insulation layer 11 located on the top surface of the box-shaped furnace body 1 is provided with a third mounting groove, the upper end of the isolation door is installed in the third mounting groove, the third mounting groove is provided on both sides of the third mounting groove, and the two ends of the third mounting groove are connected to the third mounting groove to form an inverted U shape; the two sides of the isolation door are inserted into the third mounting groove. Preferably, a vertical slide can be provided in the third mounting groove, and sliders are provided on both sides of the lower end of the rolling door to slide with the vertical slide, and during the opening and closing process of the rolling door, the lower end of the rolling door moves up and down along the vertical slide.

[0025] In one of the embodiments, a plurality of fourth mounting grooves are respectively provided on both sides of the roasting conveying mechanism, and internal air inlets 14 of the fourth mounting grooves are connected to the air delivery pipe, which is convenient for delivering air to the interior of the box-shaped furnace body. A plurality of exhaust pipes 13 are opened on the top of the box-shaped furnace body 1 to facilitate the discharge of gas inside the box-shaped furnace body.

[0026] It should be noted that in the utility model, the electric heater, natural gas burner, isolation door, closed door, roasting and conveying mechanism, gas supply pipe, exhaust pipe, etc. can all adopt common structures and materials in the prior art, and can adopt corresponding fireproof materials, heat insulation materials, etc. as needed. This is not the focus of the improvement of the utility model. The improvement of the utility model mainly lies in assembling these structures together for roasting empty shell workpieces.

[0027] The above embodiments can be combined with each other.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the utility model, which should be included in the scope of the technical solution for protection of the utility model.

Claims

1. A hollow shell workpiece liquefaction roasting device, comprising a box-shaped furnace body and a roasting conveying mechanism and a heating mechanism arranged inside the box-shaped furnace body; characterized in that: A feed port is provided at one end of the box-shaped furnace body, and a discharge port is provided at the other end of the box-shaped furnace body. The heating mechanism includes a plurality of natural gas burners and an electric heater. An isolation door is provided in the middle of the box-shaped furnace body, the electric heater is installed between the isolation door and the feed port, and the natural gas burner is installed between the isolation door and the discharge port.

2. The hollow shell workpiece liquefaction roasting device according to claim 1, characterized in that: The box-shaped furnace body is respectively provided with a portal frame corresponding to the feed port and the discharge port, the top cross beam of the portal frame is provided with a lifting mechanism, a closed door is provided between the two vertical brackets of the portal frame, vertical brackets are provided with vertical slideways on both sides of the closed door corresponding to the closed door, sliders are respectively provided on both sides of the closed door, the sliders slide in cooperation with the vertical slideways, and the lifting mechanism drives the closed door to move up and down along the vertical slideways.

3. The hollow shell workpiece liquefaction roasting device according to claim 2, characterized in that: The box-shaped furnace body includes a rectangular outer shell and an insulation layer arranged inside the rectangular outer shell. Two groups of opposite first mounting grooves are arranged inside the insulation layer. The two groups of first mounting grooves are respectively located on both sides of the roasting conveying mechanism. The natural gas burner is installed in the mounting groove. A natural gas transmission pipeline is arranged on the outside of the box-shaped furnace body corresponding to the natural gas burner.

4. The hollow shell workpiece liquefaction roasting device according to claim 3, characterized in that: A second installation groove is arranged on the heat insulation layer at the bottom surface of the box-shaped furnace body, and the roasting and conveying mechanism is installed in the second installation groove.

5. The hollow shell workpiece liquefaction roasting device according to claim 4, characterized in that: The isolation door is a rolling door structure, and a third mounting groove is provided on the insulation layer located on the top surface of the box-shaped furnace body. The upper end of the isolation door is installed in the third mounting groove, and third mounting grooves are provided on both sides of the third mounting groove. The two ends of the third mounting groove are connected to the third mounting groove to form an inverted U shape; the two sides of the isolation door are inserted into the third mounting groove.

6. The hollow shell workpiece liquefaction roasting device according to claim 5, characterized in that: A plurality of fourth installation slots are respectively arranged on both sides of the roasting and conveying mechanism, and the internal air inlets of the fourth installation slots are connected to the air conveying pipeline, and a plurality of exhaust pipelines are opened on the top of the box-shaped furnace body.

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