A continuous drying device for lost foam coating

Abstract

The present invention discloses a continuous drying device for lost foam coating, comprising a material storage base, a guide material plate, a first support plate and a feed bin. During use of the present invention, hot air sucked upwards through the guide fan blades will be ejected outwards through the drying holes on the top of the drying shell, thereby drying the bottom of the cylindrical mold. When the second annular expansion airbag is fully deployed, the second annular expansion airbag will be supported on the inner wall of the cylindrical mold, and the area inside the cylindrical mold will be separated, so that the hot air in the bottom area of ​​the cylindrical mold is slowly retained, thereby ensuring the continuous contact effect of the hot gas with the inner wall of the cylindrical mold. At this time, the opening area of ​​the cylindrical mold faces the bottom of the guide material plate, and the suction pipe sucks the hot gas ejected from the jet box and ejects it through the spray hole in the groove. Since the spray hole is parallel to the guide material plate, the hot gas will directly rush into the interior of the cylindrical mold, thereby improving the drying effect of the inner wall of the cylindrical mold.

Description

Technical Field

[0001] The invention relates to the technical field of drying lost foam mold coating, in particular to a continuous drying device for lost foam coating. Background Art

[0002] Lost foam casting is a new casting method in which foam plastic molds are cast using dry sand without binder and vacuum technology. Foam models with similar size and shape to the casting are bonded together into a model cluster, coated with refractory coating and dried, and then buried in dry quartz sand for vibration molding. The model is poured under negative pressure to vaporize the model, and liquid metal occupies the position of the model. After solidification and cooling, the casting is formed. The lost foam coating is divided into: cast iron lost foam coating, cast steel lost foam coating, alloy steel, high-melting steel, and high-manganese steel lost foam coating. At the same time, from the perspective of preventing sand from sticking to the casting, the surface of the foam model must be coated with coating, and the coating must be as dense as possible; but a dense coating is not conducive to the escape of gas generated after the gasification mold is vaporized. Therefore, the coating is required to have a certain air permeability so that the gas generated by the gasification of the model can easily pass through the coating and be sucked away by the vacuum pump through the gap between the mold materials. The coating for lost foam casting should be applied on the surface of the lost foam pattern, while the coating for traditional sand casting is brushed on the surface of the prepared casting mold. The coating methods of the two are very different, and their technical requirements are also different. There are many methods for applying lost foam coatings, such as brushing, dipping, showering, spraying or a combination of dipping and showering.

[0003] In the prior art, a continuous drying device for lost foam coating disclosed in the publication number "CN116099987A" includes a drying chamber, a feed port is provided on one side of the drying chamber, a discharge port is provided on the other side of the drying chamber, protective door curtains are installed at the feed port and the discharge port, a continuous drying mechanism is installed on the drying chamber, the continuous drying mechanism can continuously move the lost foam into the drying chamber for drying, an automatic multi-layer feeding mechanism is installed on the ground on one side of the drying chamber, and the automatic multi-layer feeding mechanism can automatically add multiple lost foams. The beneficial effect of the present invention is that after the lost foam is dipped in slurry, multiple lost foams can be automatically placed in the drying rack by rotating the containing rack and the feeding rack, and then the drying rack can be moved in the drying chamber by the driving of the driving rack, so that the lost foam can be dried continuously, which improves the work efficiency and reduces the labor intensity of the staff.

[0004] However, the existing technology still has major deficiencies, such as:

[0005] In the above-mentioned device and the prior art, the cylindrical mold needs to dry the coating after surface and inner cavity coating, and the number of coating layers is increased according to the casting requirements. If a single coating is applied, it will cause the coating to be difficult to completely solidify when drying, or the coating will crack due to excessively high drying temperature. However, it is difficult to guide the injection of external gas into the inner cavity of the cylindrical mold. The drying gas can only dry the coating on the outer surface of the cylindrical mold, resulting in the inner cavity of the cylindrical mold not being dried in time. When the coating on the outer surface of the cylindrical mold is dried, the coating on the inner cavity of the cylindrical mold dries unevenly. Summary of the invention

[0006] The object of the present invention is to provide a continuous drying device for lost foam coatings to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above-mentioned object, the present invention provides the following technical solutions: a continuous drying device for lost foam coating, comprising a material storage base, a material guide plate, a first support plate and a material supply bin, wherein a second support plate is installed on the material storage base, the first support plate is installed on the top of the second support plate, the material supply bin is arranged on one side of the top of the first support plate, the material guide plate is obliquely installed on one side of the first support plate, and a conveyor belt is arranged on one side of the first support plate;

[0008] A mold positioning and fixing unit is provided on both sides of the conveyor belt surface, and is used to place the mold in sections when the material is unloaded from the feed bin, and to lock and fix the mold at the same time, so that the mold is stably and continuously dried in the subsequent drying steps;

[0009] The mold cavity paint drying unit is installed on the surface of the mold positioning unit. After the mold is partitioned and fixed in place, the paint area of ​​the mold is cyclically dried so that the paint layer applied to the mold cavity is quickly dried.

[0010] Preferably, the mold positioning and fixing unit includes a heat-resistant rubber block, a ventilated rubber sleeve and a first air supply chamber, the heat-resistant rubber blocks are installed at intervals on the surface of the conveyor belt, an air supply cavity is arranged inside the heat-resistant rubber block, an air jet hole is opened in the central area of ​​the surface of the heat-resistant rubber block, the air jet hole is connected with the air supply cavity, an annular air supply unit is installed on the top of the heat-resistant rubber block, an embedded groove is opened on the surface of the heat-resistant rubber block, a first annular expansion air bag is installed in the inner circle of the annular air supply unit, and adjacent heat-resistant rubber blocks are connected through the ventilated rubber sleeve.

[0011] Preferably, the mold inner cavity paint drying unit includes a drying shell, which is installed on the top of the air jet holes, and the air jet holes are arranged in two groups, a vertical column is installed between the two groups of air jet holes, and guide blades are installed at intervals on the surface of the vertical column, a ventilation duct is arranged in the embedded groove, one end of the ventilation duct is connected with the annular air supply unit, an annular jet box is installed on one side of the surface of the drying shell, a second annular expansion air bag is installed on the outer ring of the annular jet box, one end of the ventilation duct passes through the embedded groove and is connected with the annular jet box, drying holes are arranged on the surface of the drying shell, and the drying holes are also arranged on the top of the drying shell.

[0012] Preferably, a mold outer wall drying unit is provided at the bottom of the conveyor belt, and the mold outer wall drying unit includes a heating box, a jet box and a nozzle. The heating box is installed on one side of the second support plate, and the jet box is symmetrically installed on the top of the heating box. One side of the jet box is inclined, and the nozzle is connected and installed on the inclined surface of the jet box.

[0013] Preferably, a semi-cylinder is installed on one side of the guide plate close to the heating box.

[0014] Preferably, a bracket is installed on one side of the first support plate, the feed bin is installed on the top of the bracket, a feed discharge hole is opened in the central area of ​​the feed bin, and installation grooves are opened on both sides of the bottom of the feed bin.

[0015] Preferably, a movable guide rail is installed in the installation groove, a clamping block is installed on the movable end of the movable guide rail, and one end of the clamping block is slidably inserted into the installation groove.

[0016] Preferably, a dustproof plate is installed on one side of the material storage base, an elastic plate is installed at one end of the material storage base, the elastic plate is inclined, a jet plate is installed at one end of the elastic plate, one end of the jet plate is inclined, a groove is provided on the surface of the jet plate, a spray hole is provided on the inner wall of the groove, the spray hole is inclined, and the spray hole is parallel to the guide plate.

[0017] Preferably, an air suction box is installed on the top of the jet plate, an air suction pipe is installed on one side of the air suction box, one end of the air suction pipe faces the top of the guide plate, the air suction pipe is arranged in several groups, and one end of the air suction pipe is connected to the spray hole.

[0018] Preferably, a motorized roller is installed on one side of the first support plate, and the conveyor belt is sleeved on the surface of the motorized roller.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The operator can load the lost foam mold with the coating applied in advance through the set feeding bin, and the adjacent clamping blocks will lock the mold into the feeding bin, and then drive the electric roller to rotate, thereby driving the conveyor belt to transport the heat-resistant rubber block to the bottom of the feeding bin. When the drying shell is at the bottom of the discharge hole, the movable guide rail is controlled to release the clamping block to lower the cylindrical mold, and the cylindrical mold falls on the top of the heat-resistant rubber block. When the cylindrical mold is in place, the annular air supply unit will inject gas into the first annular expansion airbag and the annular jet box respectively. After the first annular expansion airbag is inflated, it will support and tighten the outer ring of the end of the cylindrical mold, thereby locking and fixing the top opening area of ​​the cylindrical mold;

[0021] 2. When the annular air supply unit injects gas into the first annular expansion airbag, it will inject part of the gas into the annular jet box through the ventilation duct. After the annular jet box is fully inflated, it will fill the gas into the second annular expansion airbag. The second annular expansion airbag is inflated to support and tighten the inner ring of the bottom of the cylindrical mold on both sides, further improving the support and fixing effect of the inner wall of the cylindrical mold;

[0022] 3. The first air supply bin will inject hot gas into the air supply cavity inside a group of heat-resistant rubber blocks, and the hot gas will be discharged outward through the jet hole. The hot gas pushes the guide blades to rotate, and the guide blades rotate and push out part of the hot gas. This part of the hot gas passes through the drying hole to the inner wall of the cylindrical mold for drying. The hot air sucked upward through the guide blades will be ejected outward through the drying hole on the top of the drying shell, thereby drying the bottom of the cylindrical mold. When the second annular expansion airbag is fully deployed, the second annular expansion airbag will be supported on the inner wall of the cylindrical mold, and the area inside the cylindrical mold will be separated, so that the hot air in the bottom area of ​​the cylindrical mold is slowly retained on one side, and the hot gas will flow in through the gap between the second annular expansion airbag and the inner wall of the cylindrical mold, thereby ensuring the continuous contact time of the hot gas with the inner wall of the cylindrical mold and ensuring the drying effect of the inner wall of the cylindrical mold;

[0023] 4. As the conveyor belt continues to rotate, when the conveyor belt drives the cylindrical mold to complete the reversal, the cylindrical mold installed on the heat-resistant rubber block will pass through the drying unit of the mold outer wall. The heating box injects hot gas into the jet box and sprays it outward intermittently through the nozzle. Since one side of the jet box is inclined, the inclined nozzles on both sides circulate and spray with the surface of the cylindrical mold, further improving the drying effect of the outer surface of the cylindrical mold;

[0024] 5. When the conveyor belt drives the cylindrical mold to the top of the guide plate, the gas is drawn back by controlling the annular air supply unit, and the first annular expansion airbag and the second annular expansion airbag are contracted, thereby lowering the cylindrical mold. The cylindrical mold falls to the top of the guide plate and collides with the semi-cylinder to complete the turn. At this time, the opening area of ​​the cylindrical mold faces the bottom of the guide plate, and the suction pipe sucks in the hot gas sprayed from the jet box and sprays it through the spray hole in the groove. Since the spray hole is parallel to the guide plate, the hot gas will directly rush into the interior of the cylindrical mold, thereby further improving the drying effect of the inner wall of the cylindrical mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is an overall schematic diagram of the device of the present invention;

[0026] Figure 2 It is a partial schematic diagram of the jet plate in the present invention;

[0027] Figure 3 It is a partial cross-sectional view of the feed bin in the present invention;

[0028] Figure 4 It is a partial cross-sectional view of the heat-resistant rubber block in the present invention;

[0029] Figure 5 It is a schematic diagram of the feed bin part in the present invention;

[0030] Figure 6 For the present invention Figure 5 A magnified schematic diagram of part A;

[0031] Figure 7 It is a partial schematic diagram of the heating box in the present invention;

[0032] Figure 8 It is a schematic diagram of the connection part of multiple groups of heat-resistant adhesive blocks in the present invention.

[0033] In the figure: 1, material storage base; 11, second support plate; 12, dustproof plate; 13, elastic plate; 14, jet plate; 141, groove; 142, spray hole; 2, guide plate; 21, semi-cylinder; 3, first support plate; 31, conveyor belt; 32, electric roller; 4, feed bin; 41, mounting groove; 42, bracket; 43, clamping block; 44, movable guide rail; 45, feed hole; 5, heating box; 51, spray box; 5 2. Nozzle; 6. Heat-resistant rubber block; 61. Air supply cavity; 611. Jet hole; 62. Embedded groove; 63. Ventilation rubber sleeve; 64. Annular air supply unit; 641. First annular expansion airbag; 642. Ventilation duct; 65. Drying shell; 66. Annular jet box; 661. Second annular expansion airbag; 67. Vertical column; 671. Guide fan blade; 68. Drying hole; 7. First air supply bin; 8. Intake pipe; 9. Intake box. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] See also Figure 1-8 , the present invention provides a technical solution:

[0036] Embodiment 1: A continuous drying device for lost foam coating: comprising a material storage base 1, a guide plate 2, a first support plate 3 and a feed bin 4, wherein a second support plate 11 is mounted on the material storage base 1, the first support plate 3 is mounted on the top of the second support plate 11, the feed bin 4 is arranged on one side of the top of the first support plate 3, the guide plate 2 is obliquely mounted on one side of the first support plate 3, and a conveyor belt 31 is arranged on one side of the first support plate 3;

[0037] A semi-cylinder 21 is installed on one side of the guide plate 2 close to the heating box 5 .

[0038] A bracket 42 is installed on one side of the first support plate 3 , and the feed bin 4 is installed on the top of the bracket 42 . A feeding hole 45 is opened in the central area of ​​the feed bin 4 , and installation grooves 41 are opened on both sides of the bottom of the feed bin 4 .

[0039] A movable guide rail 44 is installed in the installation groove 41 , and a clamping block 43 is installed on the movable end of the movable guide rail 44 . One end of the clamping block 43 is slidably inserted into the installation groove 41 .

[0040] A motorized roller 32 is installed on one side of the first support plate 3 , and the conveyor belt 31 is sleeved on the surface of the motorized roller 32 .

[0041] In this embodiment, the operator can load the lost foam mold with the paint applied in advance through the set feed bin 4, and the adjacent clamping block 43 will lock the mold into the feed bin 4, and then drive the electric roller 32 to rotate, thereby driving the conveyor belt 31 to transport the heat-resistant rubber block 6 to the bottom of the feed bin 4. When the drying shell 65 is located at the bottom of the discharge hole 45, the movable guide rail 44 is controlled to release the clamping block 43 to lower the cylindrical mold, and the cylindrical mold falls on the top of the heat-resistant rubber block 6. When the cylindrical mold is in place, the annular air supply unit 64 will inject gas into the first annular expansion airbag 641 and the annular jet box 66 respectively. After the first annular expansion airbag 641 is inflated, it will support and tighten the outer ring of the end of the cylindrical mold, thereby locking and fixing the top opening area of ​​the cylindrical mold.

[0042] The mold positioning and fixing unit is arranged on both sides of the surface of the conveyor belt 31, and is used to place the mold in different areas when the material is unloaded from the feeding bin 4, and to lock and fix the mold at the same time, so that the mold can be stably and continuously dried in the subsequent drying steps;

[0043] The mold positioning and fixing unit includes a heat-resistant rubber block 6, a ventilation rubber sleeve 63 and a first air supply bin 7. The heat-resistant rubber blocks 6 are installed at intervals on the surface of the conveyor belt 31. An air supply cavity 61 is arranged inside the heat-resistant rubber block 6. An injection hole 611 is opened in the central area of ​​the surface of the heat-resistant rubber block 6. The injection hole 611 is connected to the air supply cavity 61. An annular air supply unit 64 is installed on the top of the heat-resistant rubber block 6. An embedded groove 62 is opened on the surface of the heat-resistant rubber block 6. The inner circle of the annular air supply unit 64 is connected and installed with a first annular expansion air bag 641. Adjacent heat-resistant rubber blocks 6 are connected through the ventilation rubber sleeve 63.

[0044] In this embodiment, the first air supply bin 7 will inject hot gas into the air supply cavity 61 inside a group of heat-resistant rubber blocks 6, and the hot gas will be discharged outward through the jet hole 611. The hot gas pushes the guide blades 671 to rotate, and the guide blades 671 rotate and push out part of the hot gas. This part of the hot gas passes through the drying hole 68 to the inner wall of the cylindrical mold for drying. The hot air sucked upward through the guide blades 671 will be ejected outward through the drying hole 68 at the top of the drying shell 65, thereby drying the bottom of the cylindrical mold. The ventilation rubber sleeve 63 will continuously transport the transported hot gas, and then fill the interior of multiple groups of heat-resistant rubber blocks 6 with the hot gas.

[0045] The mold cavity paint drying unit is installed on the surface of the mold positioning unit. After the mold is partitioned and fixed in place, the paint area of ​​the mold is cyclically dried so that the paint layer applied to the mold cavity can be quickly dried.

[0046] The mold cavity paint drying unit includes a drying shell 65, which is installed on the top of the jet hole 611. The jet hole 611 is arranged in two groups. A vertical column 67 is installed between the two groups of jet holes 611. Guide blades 671 are installed at intervals on the surface of the vertical column 67. A ventilation duct 642 is arranged in the embedded groove 62. One end of the ventilation duct 642 is connected to the annular air supply unit 64. An annular jet box 66 is installed on one side of the surface of the drying shell 65. A second annular expansion airbag 661 is installed on the outer circle of the annular jet box 66. One end of the ventilation duct 642 passes through the embedded groove 62 and is connected to the annular jet box 66. Drying holes 68 are arranged on the surface of the drying shell 65, and drying holes 68 are also arranged on the top of the drying shell 65.

[0047] In this embodiment, when the annular air supply unit 64 injects gas into the first annular expansion airbag 641, part of the gas will be injected into the annular jet box 66 through the ventilation duct 642. After the annular jet box 66 is fully inflated, the gas will be filled into the second annular expansion airbag 661. The second annular expansion airbag 661 is inflated to support and tighten the inner ring of the bottom of the cylindrical mold on both sides, further improving the support and fixing effect of the inner wall of the cylindrical mold. The first air supply bin 7 will inject hot gas into the air supply cavity 61 inside a group of heat-resistant rubber blocks 6, and the hot gas will be discharged outward through the jet hole 611. The hot gas pushes the guide blade 671 to rotate, and the guide blade 671 will partially Part of the hot gas is rotated and pushed out, and this part of the hot gas is dried toward the inner wall of the cylindrical mold through the drying hole 68. The hot air sucked upward through the guide fan blades 671 will be ejected outward through the drying hole 68 at the top of the drying shell 65, thereby drying the bottom of the cylindrical mold. When the second annular expansion airbag 661 is fully deployed, the second annular expansion airbag 661 will be supported on the inner wall of the cylindrical mold, and the area inside the cylindrical mold will be separated, so that the hot air in the bottom area of ​​the cylindrical mold is slowly retained on one side, thereby ensuring that the hot gas continues to contact the inner wall of the cylindrical mold, and ensuring the drying effect of the inner wall of the cylindrical mold.

[0048] A mold outer wall drying unit is arranged at the bottom of the conveyor belt 31, and the mold outer wall drying unit includes a heating box 5, a jet box 51 and a nozzle 52. The heating box 5 is installed on one side of the second support plate 11, and the jet box 51 is symmetrically installed on the top of the heating box 5. One side of the jet box 51 is inclined, and the nozzle 52 is connected and installed on the inclined surface of the jet box 51.

[0049] In this embodiment, as the conveyor belt 31 continues to rotate, when the conveyor belt 31 drives the cylindrical mold to complete the reversal, the cylindrical mold installed on the heat-resistant rubber block 6 will pass through the drying unit part of the outer wall of the mold, and the heating box 5 will inject hot gas into the jet box 51 and intermittently spray it outward through the nozzle 52. Since one side of the jet box 51 is inclined, the inclined nozzles 52 on both sides circulate and spray with the surface of the cylindrical mold, further improving the drying effect on the outer surface of the cylindrical mold.

[0050] Embodiment 2:

[0051] This embodiment is based on the first embodiment. Considering that when the cylindrical mold is positioned and installed, the inner and outer walls of the cylindrical mold are supported and tightened by the airbag, but the inner ring of the cylindrical mold and the airbag contact area cannot be dried during the drying process. Therefore, a hot gas inclined injection structure is provided in this embodiment, so that during the cylindrical mold blanking process, the hot gas is injected into the inside of the cylindrical mold in parallel, so as to further dry the inner ring of the cylindrical mold and the airbag contact area;

[0052] A dustproof plate 12 is installed on one side of the material storage base 1, an elastic plate 13 is installed on one end of the material storage base 1, the elastic plate 13 is tilted, an air jet plate 14 is installed on one end of the elastic plate 13, one end of the air jet plate 14 is tilted, a groove 141 is provided on the surface of the air jet plate 14, a spray hole 142 is provided on the inner wall of the groove 141, the spray hole 142 is tilted, and the spray hole 142 is parallel to the guide plate 2;

[0053] An air suction box 9 is installed on the top of the jet plate 14 , and an air suction pipe 8 is installed on one side of the air suction box 9 . One end of the air suction pipe 8 faces the top of the guide plate 2 . The air suction pipe 8 is arranged in several groups, and one end of the air suction pipe 8 is connected to the spray hole 142 .

[0054] In this embodiment, when the conveyor belt 31 drives the cylindrical mold to the top of the guide plate 2, the gas is drawn back by controlling the annular air supply unit 64, and the first annular expansion airbag 641 and the second annular expansion airbag 661 shrink, thereby lowering the cylindrical mold. The cylindrical mold falls to the top of the guide plate 2 and collides with the semi-cylinder 21 to complete the turn. At this time, the opening area of ​​the cylindrical mold faces the bottom of the guide plate 2, and the suction pipe 8 sucks the hot gas sprayed from the jet box 51 into the suction box 9 and sprays it through the spray hole 142 in the groove 141. Since the spray hole 142 is parallel to the guide plate 2, the hot gas will directly rush into the interior of the cylindrical mold, thereby further improving the drying effect of the inner wall of the cylindrical mold.

[0055] Working principle: During the use of this device,

[0056] The feeding bin 4 loads the lost foam mold with the coating applied in advance, and the adjacent clamping block 43 locks the mold into the feeding bin 4, and then drives the electric roller 32 to rotate, thereby driving the conveyor belt 31 to transport the heat-resistant rubber block 6 to the bottom of the feeding bin 4. When the drying shell 65 is located at the bottom of the discharge hole 45, the movable guide rail 44 is controlled to release the clamping block 43 to lower the cylindrical mold, and the cylindrical mold falls on the top of the heat-resistant rubber block 6. When the cylindrical mold is in place, the annular air supply unit 64 will inject gas into the first annular expansion airbag 641 and the annular jet box 66 respectively. After the first annular expansion airbag 641 is inflated, it will support and tighten the outer ring of the end of the cylindrical mold, thereby locking and fixing the top opening area of ​​the cylindrical mold;

[0057] When the annular air supply unit 64 injects gas into the first annular expansion airbag 641, part of the gas will be injected into the annular jet box 66 through the ventilation duct 642. After the annular jet box 66 is fully inflated, the gas will be injected into the second annular expansion airbag 661. The second annular expansion airbag 661 is inflated to support and tighten the inner ring of the bottom of the cylindrical mold on both sides, further improving the support and fixing effect of the inner wall of the cylindrical mold. The first air supply bin 7 will inject hot gas into the air supply cavity 61 inside a group of heat-resistant rubber blocks 6. The hot gas will be discharged outward through the jet hole 611. The hot gas pushes the guide blade 671 to rotate, and the guide blade 671 will part of the heat The gas is rotated and pushed out, and this part of the hot gas passes through the drying hole 68 to the inner wall of the cylindrical mold for drying treatment. The hot air sucked upwards through the guide fan blades 671 will be ejected outwards through the drying hole 68 at the top of the drying shell 65, thereby drying the bottom of the cylindrical mold. When the second annular expansion airbag 661 is fully deployed, the second annular expansion airbag 661 will be supported on the inner wall of the cylindrical mold, and the area inside the cylindrical mold will be separated, so that the hot air in the bottom area of ​​the cylindrical mold is slowly retained on one side, thereby ensuring the continuous contact effect of the hot gas with the inner wall of the cylindrical mold and ensuring the drying effect of the inner wall of the cylindrical mold;

[0058] When the conveyor belt 31 drives the cylindrical mold to complete the reversal, the cylindrical mold installed on the heat-resistant rubber block 6 will pass through the drying unit of the mold outer wall, and the heating box 5 will inject the hot gas into the jet box 51 and intermittently spray it outward through the nozzle 52. Since one side of the jet box 51 is inclined, the nozzles 52 inclined on both sides circulate and spray with the surface of the cylindrical mold, further improving the drying effect of the outer surface of the cylindrical mold;

[0059] When the conveyor belt 31 drives the cylindrical mold to the top of the guide plate 2, the gas is drawn back by controlling the annular air supply unit 64, and the first annular expansion airbag 641 and the second annular expansion airbag 661 shrink, thereby lowering the cylindrical mold. The cylindrical mold falls to the top of the guide plate 2 and collides with the semi-cylinder 21 to complete the turn. At this time, the opening area of ​​the cylindrical mold faces the bottom of the guide plate 2, and the suction pipe 8 sucks in the hot gas sprayed from the jet box 51 and sprays it through the spray hole 142 in the groove 141. Since the spray hole 142 is parallel to the guide plate 2, the hot gas will directly rush into the interior of the cylindrical mold, thereby further improving the drying effect of the inner wall of the cylindrical mold.

[0060] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A continuous drying device for lost foam coating, characterized in that: The material storage device comprises a material storage base (1), a material guide plate (2), a first support plate (3) and a material supply bin (4); the material storage base (1) is mounted with a second support plate (11); the first support plate (3) is mounted on the top of the second support plate (11); the material supply bin (4) is arranged on one side of the top of the first support plate (3); the material guide plate (2) is obliquely mounted on one side of the first support plate (3); and a conveyor belt (31) is arranged on one side of the first support plate (3); A mold positioning and fixing unit, the mold positioning and fixing unit comprising a heat-resistant rubber block (6), a ventilating rubber sleeve (63) and a first air supply chamber (7), the heat-resistant rubber block (6) being installed at intervals on the surface of the conveyor belt (31), an air supply cavity (61) being arranged inside the heat-resistant rubber block (6), an air jet hole (611) being provided in the central area of ​​the surface of the heat-resistant rubber block (6), the air jet hole (611) being communicated with the air supply cavity (61), an annular air supply unit (64) being installed on the top of the heat-resistant rubber block (6), an embedded groove (62) being provided on the surface of the heat-resistant rubber block (6), a first annular expansion air bag (641) being connected and installed in the inner circle of the annular air supply unit (64), and adjacent heat-resistant rubber blocks (6) being communicated through the ventilating rubber sleeve (63); A mold cavity paint drying unit, the mold cavity paint drying unit comprising a drying shell (65), the drying shell (65) being mounted on the top of the jet hole (611), the jet hole (611) being arranged in two groups, a vertical column (67) being mounted between the two groups of the jet holes (611), guide blades (671) being mounted at intervals on the surface of the vertical column (67), a ventilation duct (642) being arranged in the embedded groove (62), the ventilation duct (642) being arranged An end of the drying shell (65) is connected to the annular air supply unit (64); an annular jet box (66) is installed on one side of the surface of the drying shell (65); a second annular expansion air bag (661) is installed on the outer ring of the annular jet box (66); one end of the ventilation conduit (642) passes through the embedded groove (62) and is connected to the annular jet box (66); a drying hole (68) is provided on the surface of the drying shell (65); and the drying hole (68) is also provided on the top of the drying shell (65).

2. A continuous drying device for lost foam coating according to claim 1, characterized in that: A mould outer wall drying unit is arranged at the bottom of the conveyor belt (31), and the mould outer wall drying unit comprises a heating box (5), a jet box (51) and a nozzle (52); the heating box (5) is mounted on one side of the second support plate (11); the jet box (51) is symmetrically mounted on the top of the heating box (5); one side of the jet box (51) is inclined; and the nozzle (52) is connected and mounted on the inclined surface of the jet box (51).

3. A continuous drying device for lost foam coating according to claim 2, characterized in that: A semi-cylinder (21) is installed on one side of the guide plate (2) close to the heating box (5).

4. A continuous drying device for lost foam coating according to claim 1, characterized in that: A bracket (42) is installed on one side of the first support plate (3), the feed bin (4) is installed on the top of the bracket (42), a feed hole (45) is provided in the central area of ​​the feed bin (4), and mounting grooves (41) are provided on both sides of the bottom of the feed bin (4).

5. A continuous drying device for lost foam coating according to claim 4, characterized in that: A movable guide rail (44) is installed in the installation groove (41), a clamping block (43) is installed on the movable end of the movable guide rail (44), and one end of the clamping block (43) is slidably inserted through the installation groove (41).

6. A continuous drying device for lost foam coating according to claim 1, characterized in that: A dustproof plate (12) is installed on one side of the material storage base (1), and an elastic plate (13) is installed on one end of the material storage base (1), and the elastic plate (13) is arranged obliquely. An air jet plate (14) is installed on one end of the elastic plate (13), and one end of the air jet plate (14) is arranged obliquely. A groove (141) is arranged on the surface of the air jet plate (14), and a spray hole (142) is arranged on the inner wall of the groove (141), and the spray hole (142) is arranged obliquely and parallel to the guide plate (2).

7. A continuous drying device for lost foam coating according to claim 6, characterized in that: An air suction box (9) is installed on the top of the jet plate (14), and an air suction pipe (8) is installed on one side of the air suction box (9). One end of the air suction pipe (8) faces the top of the guide plate (2). The air suction pipe (8) is arranged in a plurality of groups, and one end of the air suction pipe (8) is connected to the spray hole (142).

8. The continuous drying device for lost foam coating according to claim 1, characterized in that: A motorized roller (32) is mounted on one side of the first support plate (3), and the conveyor belt (31) is sleeved on the surface of the motorized roller (32).

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