A lost wax casting shell making device

Abstract

The present invention belongs to the technical field of lost wax casting, and specifically is a lost wax casting shell making device, comprising a machine base; two fixed columns are fixedly connected to the top of the machine base; a drying box with multiple output end electric heaters is provided to dry and solidify the wax trees that are suspended and transported, so as to achieve the effect of non-stop drying and shell making of the wax trees on the barbecue grill, thereby reducing the situation where the workpiece is not dried and solidified after sanding, resulting in difficulty in firm adhesion of powder on the surface of the wax mold; the wax trees are uniformly dried synchronously from different angles through the multiple output ends of the electric heater, and symmetrical air supply at the four corners can form a three-dimensional circulating airflow, avoiding uneven drying caused by unilateral air supply, and preventing the shell from generating stress cracks due to excessive local drying, thereby improving the effect of drying and solidifying the wax trees; the method of hanging, conveying, drying and solidifying the wax trees composed of the barbecue grill by a ring conveyor can avoid adhesion of the wax trees to the contact surface, thereby ensuring drying efficiency and reducing the risk of wax mold deformation.

Description

Technical Field

[0001] The invention belongs to the technical field of lost wax casting, in particular to a shell making device using a lost wax casting method. Background Art

[0002] Lost wax casting, also known as investment casting, is a precision metal forming process. Its core process is as follows: first, a precise wax mold is made with fusible wax material, which is assembled into a wax tree. Then, it is repeatedly coated with refractory slurry and sanded, and dried and solidified to form a multi-layer ceramic shell; then it is heated and dewaxed to form a hollow shell, which is then roasted at high temperature and poured with molten metal. After cooling, the shell is removed to obtain high-precision castings. This process is particularly suitable for manufacturing metal parts with complex structures and high surface finish requirements.

[0003] A patent application with publication number CN119839240A discloses a shell making machine for lost wax casting, including a circulating conveyor line and a first slurry dipping assembly and a sand sprinkling mechanism arranged in sequence along the conveying direction of the circulating conveyor line. The bottom surface of the moving part of the circulating conveyor line is fixedly connected with evenly distributed suspension assemblies. This application can facilitate the removal and placement of wax molds through the set lost wax casting shell making machine, and there is no need to stop work and production during the removal and placement of the wax molds, thereby improving work efficiency.

[0004] In the lost wax casting shell making technology, although the above-mentioned shell making device can apply slurry and sand to the assembled wax mold, and take and place the wax mold without stopping the machine, this technology effectively improves production efficiency. However, this shell making device has certain limitations. For example, the workpiece is not dried and solidified after sanding. The lack of drying and solidification treatment can easily lead to the powder on the surface of the wax mold failing to adhere firmly, thereby affecting the final casting quality of the finished product.

[0005] To this end, the present invention provides a shell making device using a lost wax casting method. Summary of the Invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve its technical problems is: the lost wax casting shell making device described in the present invention includes a machine base; two fixed columns are fixedly connected to the top of the machine base; a ring conveyor is fixedly connected to the fixed columns, and the two fixed columns are supported on the bottom of the ring conveyor; a plurality of fixed blocks are fixedly connected to the bottom of the conveyor belt of the ring conveyor; an electric cylinder is fixedly connected to the bottom of the fixed block; a drying box is fixedly connected to the side of the machine base close to the ring conveyor; an electric heater is fixedly connected to the interior of the drying box, and the electric heater is provided with multiple output ends, and the multiple output ends of the electric heater are respectively located at the four corners of the inner wall of the drying box.

[0008] Preferably, a bending plate is fixedly connected to the bottom end of the electric cylinder; a No. 1 rotating rod is rotatably connected to the bottom inner wall of the bending plate; and a roller is fixedly connected to one end of the No. 1 rotating rod.

[0009] Preferably, the rotating roller is provided with two opposite and crossed limiting chutes, and the two limiting chutes are divided into a main chute and a secondary chute, and the depth of the main chute is deeper than the depth of the secondary chute; the inner wall of the drying box is respectively fixed with a No. 1 fixed rod and a No. 2 fixed rod, and the No. 1 fixed rod and the No. 2 fixed rod are opposite and spaced apart, and the No. 1 fixed rod and the No. 2 fixed rod correspond to the two limiting chutes respectively.

[0010] Preferably, the end of the No. 1 rotating rod away from the roller is fixedly connected to a connecting seat; the bottom of the connecting seat is rotatably connected to the No. 2 rotating rod; the bottom end of the No. 2 rotating rod is fixedly connected to a suspension seat; the bottom end of the suspension seat is threadedly connected to a threaded column; the bottom end of the threaded column is fixedly connected to a fixing frame.

[0011] Preferably, a turntable is fixedly connected to the outer wall of the second rotating rod; a friction plate is fixedly connected to the inner wall of the drying box and the side close to the first fixed rod; and an anti-slip pad is fixedly connected to the outer wall of the friction plate.

[0012] Preferably, the openings at both ends of the drying box are connected to rotating shafts via torsion springs for relative rotation; a sealing plate is fixed to the outer wall of the rotating shaft, and inclined surfaces are provided on opposite sides of the two sealing plates.

[0013] Preferably, two sealing pads are relatively fixedly connected to the drying box; the sealing pads are made of silicone rubber.

[0014] Preferably, a slurry hanging cylinder is fixedly connected to the side of the machine base away from the drying box; and a sand spreading cylinder is fixedly connected to the side of the machine base close to the slurry hanging cylinder.

[0015] Preferably, a fixing seat is fixedly connected to one side of the drying box close to the pulp hanging cylinder; a No. 3 fixing rod is fixedly connected to the outer wall of the fixing seat, and the No. 3 fixing rod corresponds to a limiting sliding groove.

[0016] Preferably, a receiving seat is fixedly connected to the machine base; the receiving seat is located on the side of the slurry hanging cylinder away from the sand spreading cylinder.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. The shell-making device of the lost wax casting method described in the present invention dries and solidifies the wax trees that are suspended and transported by setting a drying box with multiple output end electric heaters, thereby playing the role of drying and shell-making the wax trees of the barbecue grill without stopping, and reducing the situation where the workpiece is not dried and solidified after sanding, which makes it difficult for the powder on the surface of the wax mold to adhere firmly; the multiple output ends of the electric heater are respectively located at the four corners of the inner wall of the drying box, so that the wax trees can be uniformly dried synchronously from different angles, and the symmetrical air supply at the four corners can form a three-dimensional circulating airflow, avoids the uneven drying caused by unilateral air supply, and prevents the shell from generating stress cracks due to local excessive drying, thereby improving the effect of drying and solidifying the wax trees; the hot air generated by the output end of the electric heater penetrates the gap between the wax trees from multiple angles, accelerates the evaporation of water in the slurry layer, and shortens the drying time compared with static drying; the method of hanging and transporting the wax trees composed of the barbecue grill by the ring conveyor for drying and solidification can avoid the wax trees from sticking to the contact surface, and cooperates with the mild convection hot air to ensure the drying efficiency and reduce the risk of deformation of the wax mold.

[0019] 2. The lost wax casting shell making device described in the present invention drives the roller to rotate in the forward and reverse directions at intervals by the set No. 1 fixed rod and the No. 2 fixed rod, so as to realize the bidirectional rotation drying and solidification of the wax tree in the drying box. The wax tree is dried by rotating alternately in the forward and reverse directions instead of rotating in a single direction, and the bidirectional rotation can offset the unidirectional migration of the slurry caused by centrifugal force; the friction between the outer wall of the turntable and the friction plate is utilized, and the anti-slip pad increases the friction with the turntable surface, so that the suspended wax tree remains in a horizontal state for rotation and drying. When rotating horizontally, gravity always acts perpendicularly to the axial direction of the wax tree, so that the slurry is evenly distributed in the circumferential direction, which can avoid the accumulation of slurry at the lower end when it is vertically suspended; at the same time, the centrifugal force generated by the horizontal rotation of the wax tree can timely throw off the excess unbonded sand particles to maintain the surface roughness. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] Figure 1 It is a perspective view of the present invention;

[0022] Figure 2 It is a structural schematic diagram of the ring conveyor in the present invention;

[0023] Figure 3 It is a structural schematic diagram of the transfer roller of the present invention;

[0024] Figure 4 It is a structural schematic diagram of the drying box in the present invention;

[0025] Figure 5 It is a structural schematic diagram of the friction plate in the present invention.

[0026] In the figure: 1. Machine base; 11. Fixed column; 12. Ring conveyor; 13. Fixed block; 14. Electric cylinder; 15. Drying box; 16. Electric heater; 2. Bending plate; 21. Rotating rod No. 1; 22. Roller; 3. Fixed rod No. 1; 31. Fixed rod No. 2; 4. Connecting seat; 41. Rotating rod No. 2; 42. Suspension seat; 43. Threaded column; 44. Fixed frame; 5. Turntable; 51. Friction plate; 52. Anti-slip pad; 6. Rotating shaft; 61. Sealing plate; 7. Sealing pad; 8. Slurry hanging cylinder; 81. Sand spreading cylinder; 9. Fixed seat; 91. Fixed rod No. 3; 92. Receiver seat. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0028] like Figures 1 to 5As shown, a lost wax casting shell making device according to an embodiment of the present invention comprises a machine base 1; two fixing columns 11 are fixedly connected to the top of the machine base 1; a ring conveyor 12 is fixedly connected to the fixing columns 11, and the two fixing columns 11 are supported on the bottom of the ring conveyor 12; a plurality of fixing blocks 13 are fixedly connected to the bottom of the conveyor belt of the ring conveyor 12; an electric cylinder 14 is fixedly connected to the bottom end of the fixing block 13; a drying box 15 is fixedly connected to the side of the machine base 1 close to the ring conveyor 12; an electric heater 16 is fixedly connected to the interior of the drying box 15, and the electric heater 16 is provided with a plurality of output terminals, and the plurality of output terminals of the electric heater 16 are respectively located at The four corners of the inner wall of the drying box 15; in the lost wax casting workpiece shell making technology, taking the barbecue grill shell making as an example, the liquid wax is first pressed into the metal mold using a wax injection machine, and the wax mold of the barbecue grill is taken out after cooling, and multiple wax molds are welded to form a wax tree, and then the wax tree is hung on the bottom end of the electric cylinder 14. The fixed column 11 on the machine base 1 supports the circular conveyor 12. As the circular conveyor 12 and the electric heater 16 start working, the multiple output ends of the electric heater 16 supply heat to the inside of the drying box 15. The conveyor belt of the circular conveyor 12 synchronously drives the multiple fixed blocks 13 to rotate in a circular manner. During the rotation, the wax tree is subjected to the slurry and sanding process. Then the electric cylinder 14 is rotated according to the rotation of the wax tree. The inlet and outlet heights automatically adjust the height of the hanging wax tree, and the wax tree hung after sanding is sent into the drying box 15. The multiple output ends of the electric heater 16 blow hot air from the inner wall of the drying box 15 to the hanging wax tree, and dry and solidify the wax tree. The dried and solidified wax tree leaves the drying box 15 as it is continuously transported by the ring conveyor 12, and then the slurry coating, sanding and drying and solidification are repeated until the shell thickness meets the standard, that is, the shell making is completed, which plays the role of drying and shell making the barbecue rack wax tree without stopping, and reduces the situation where the powder on the surface of the wax mold is difficult to adhere firmly to the workpiece due to the lack of drying and solidification after sanding; the multiple output ends of the electric heater 16 are located at the drying box 15 The four corners of the inner wall of the box 15 can simultaneously and evenly dry the wax tree from different angles. The symmetrical air supply at the four corners can form a three-dimensional circulating airflow, avoiding uneven drying caused by unilateral air supply, and preventing the shell from generating stress cracks due to local excessive drying, thereby improving the drying and curing effect of the wax tree; the hot air generated at the output end of the electric heater 16 penetrates the gaps between the wax trees from multiple angles, accelerates the evaporation of moisture in the slurry layer, and shortens the drying time compared to static drying; the wax tree hanging, conveying, drying and curing method composed of a pair of grills composed of a ring conveyor 12 can avoid the wax tree from sticking to the contact surface, and with the help of mild convection hot air, it can not only ensure drying efficiency but also reduce the risk of wax mold deformation.

[0029] The bottom end of the electric cylinder 14 is fixedly connected to a bending plate 2; the bottom inner wall of the bending plate 2 is rotatably connected to a No. 1 rotating rod 21; one end of the No. 1 rotating rod 21 is fixedly connected to a roller 22; when the wax tree composed of the barbecue grill is hung and shelled, the wax tree is hung and fixed on the end of the No. 1 rotating rod 21 away from the roller 22, and the bending plate 2 is fixed to the bottom end of the electric cylinder 14 to support the No. 1 rotating rod 21. As the wax tree is coated with pulp and sanded and sent into the drying box 15, the roller 22 can be rotated by a tool, and the roller 22 synchronously drives the No. The wax tree suspended on the rotating rod 21 rotates on the inner wall of the curved plate 2, presenting an annular suspended rotating drying. In the rotating state, all surfaces of the wax tree including the complex inner cavity structure can be evenly exposed to the action of hot air, eliminating the stress cracks of the mold shell caused by local uneven drying; the centrifugal effect generated by the rotation can enhance the penetration of hot air into the gap between the modules, and improve the evaporation efficiency of the water in the slurry layer; the rotating wax tree can prevent the undried slurry from gathering downward due to gravity, and reduce the accumulation of slurry at the bottom of the wax tree when the wax tree is suspended and transported horizontally for drying, thereby ensuring the thickness of the shell layer.

[0030] The roller 22 is provided with two opposite and cross limiting chutes, and the two limiting chutes are divided into a main groove and a sub-groove, and the depth of the main groove is deeper than the depth of the sub-groove; the inner wall of the drying box 15 is fixedly connected with a No. 1 fixed rod 3 and a No. 2 fixed rod 31, respectively, and the No. 1 fixed rod 3 and the No. 2 fixed rod 31 are opposite and spaced apart, and the No. 1 fixed rod 3 and the No. 2 fixed rod 31 correspond to the two limiting chutes respectively; when the hanging wax tree is sent into the drying box 15 for drying and solidification, the wax tree is suspended and transported into the drying box 15, and the No. 1 fixed rod 3 first slides into the main groove of the two limiting chutes on the roller 22, and as the wax tree continues to dry, the No. 1 fixed rod 3 slides into the main groove of the two limiting chutes on the roller 22. Sliding, the No. 1 fixed rod 3 slides in the main groove and drives the roller 22 to rotate, and the wax tree also rotates forward. Then, when the roller 22 slides to the No. 2 fixed rod 31, the No. 2 fixed rod 31 slides into the auxiliary grooves of the two limiting slides, driving the wax tree to rotate in the opposite direction. Since the depths of the main groove and the auxiliary groove are different, the No. 1 fixed rod 3 and the No. 2 fixed rod 31 can continue to slide in one groove during the sliding process, realizing the effect of driving the wax tree to rotate in both directions for drying and solidification in the drying box 15. The drying of the wax tree is replaced by drying in a single direction by alternating forward and reverse rotation. The bidirectional rotation can offset the unidirectional migration of the slurry caused by centrifugal force.

[0031] like Figures 1 to 3As shown, the end of the No. 1 rotating rod 21 away from the roller 22 is fixedly connected to the connecting seat 4; the bottom of the connecting seat 4 is rotatably connected to the No. 2 rotating rod 41; the bottom end of the No. 2 rotating rod 41 is fixedly connected to the hanging seat 42; the bottom end of the hanging seat 42 is threadedly connected to the threaded column 43; the bottom end of the threaded column 43 is fixedly connected to the fixing frame 44; when hanging the wax tree, the connecting seat 4 cooperates with the No. 2 rotating rod 41 to be fixed to the end of the No. 1 rotating rod 21 away from the roller 22 as the main support for hanging the wax tree, and the hanging seat 42 is fixed to the bottom of the No. 2 rotating rod 41 for docking and hanging the wax tree, and multiple wax molds are welded to both sides of the fixing frame 44 to form a wax tree, and the threaded column 43 fixed on the handheld fixing frame 44 is screwed into the bottom of the hanging seat 42 for fixing, thereby realizing the hanging of the wax tree. At the same time, when the shell is completed, the threaded column 43 is unscrewed in the reverse direction to unload the wax tree.

[0032] like Figures 1 to 5 As shown, the outer wall of the No. 2 rotating rod 41 is fixed with a turntable 5; the inner wall of the drying box 15 and the side close to the No. 1 fixed rod 3 are fixed with a friction plate 51; the outer wall of the friction plate 51 is fixed with an anti-slip pad 52; when the wax tree is sent into the drying box 15 for drying and curing, the turntable 5 fixed on the No. 2 rotating rod 41 and the outer wall of the friction plate 51 are rubbed, and the anti-slip pad 52 increases the friction force with the surface of the turntable 5, so that the suspended wax tree remains in a horizontal state and rotates to dry. When rotating horizontally, gravity always acts perpendicularly to the axial direction of the wax tree, so that the slurry is evenly distributed in the circumferential direction, which can avoid the accumulation of slurry at the lower end when it is vertically suspended; at the same time, the centrifugal force generated by the horizontal rotation of the wax tree can timely throw off the excess unbonded sand particles to maintain the surface roughness.

[0033] like Figure 1 、 Figure 2 、 Figure 4 and Figure 5 As shown, the openings at both ends of the drying box 15 are connected to the rotating shaft 6 by torsion springs for relative rotation in pairs; the outer wall of the rotating shaft 6 is fixedly connected to a sealing plate 61, and the two sealing plates 61 are provided with an inclined surface on the opposite side; when the wax tree is hung and sent into the drying box 15 for drying and curing, four rotating shafts 6 facing each other are respectively located at the openings at both ends of the drying box 15, and a sealing plate 61 is installed on each rotating shaft 6. The four sealing plates 61 seal the openings at both ends of the drying box 15, thereby reducing heat loss in the drying box 15 and ensuring the drying and curing temperature in the drying box 15; at the same time, when the wax tree is hung and transported to the opening of the drying box 15, the turntable 5 can squeeze the two sealing plates 61 at the front end of the wax tree to open the opening of the drying box 15 along with the two rotating shafts 6, and the torsion spring contracts and is stressed until the roller 22 enters the interior of the drying box 15, at which time the elastic force of the torsion spring drives the rotating shaft 6 and the sealing plate 61 to rotate and reset, thereby playing the role of adaptively opening and closing the openings at both ends of the drying box 15.

[0034] Two sealing pads 7 are relatively fixedly connected to the drying box 15; the material of the sealing pads 7 is silicone rubber; when the wax tree is heated and cured inside the drying box 15, the two sealing pads 7 made of silicone rubber are relatively fixed to the opening above the drying box 15 to seal, which can reduce the loss of heat inside the drying box 15. When the bending plate 2 is suspended and slid to the sealing pads 7, the bending plate 2 can squeeze the two sealing pads 7 to ensure that the bending plate 2 can normally suspend the wax tree and transport it into the drying box 15.

[0035] like Figure 1 and Figure 2 As shown, a slurry hanging tube 8 is fixedly connected to the side of the machine base 1 away from the drying box 15; a sanding tube 81 is fixedly connected to the side of the machine base 1 close to the slurry hanging tube 8; when the wax tree consisting of the wax mold of the barbecue grill is slurried and sanded, the wax tree is suspended and transported to the top of the slurry hanging tube 8, and the output end of the electric cylinder 14 drives the suspended wax tree to descend in height, and the wax tree then enters the slurry hanging tube 8 for slurrying, and then the output end of the electric cylinder 14 drives the wax tree to rise and continue to be transported. When the wax tree after slurrying is sent to the top of the sanding tube 81, the output end of the electric cylinder 14 descends in height again, and the wax tree enters the sanding tube 81 for sanding, and then the output end of the electric cylinder 14 drives the wax tree to rise and continue to be transported to the drying box 15 for drying, which plays the role of slurrying and sanding the wax tree.

[0036] like Figure 1 、 Figure 2 、 Figure 4 and Figure 5 As shown, the drying box 15 is fixedly connected to a fixed seat 9 on one side close to the slurry hanging tube 8; the outer wall of the fixed seat 9 is fixedly connected to a No. 3 fixed rod 91, and the No. 3 fixed rod 91 corresponds to a limiting slide; when the wax tree is hung and transported to hang slurry, the wax tree goes deep into the slurry hanging tube 8 for hanging slurry, and then the wax tree is lifted up by the electric cylinder 14 to continue transportation. At this time, the No. 3 fixed rod 91 fixed by the fixed seat 9 corresponds to the limiting slide of the roller 22, driving the wax tree with hanging slurry to rotate. The dynamic rotation can destroy the thixotropic structure of the slurry and reduce the teardrop-shaped slurry accumulation generated during vertical hanging.

[0037] like Figure 1 As shown, a receiving seat 92 is fixed to the machine base 1; the receiving seat 92 is located on the side of the slurry hanging tube 8 away from the sand spreading tube 81; when multiple wax trees are loaded, the multiple wax trees are placed on the receiving seat 92 in sequence, and as the hanging seat 42 is suspended and transported to a position above the receiving seat 92, the ring conveyor 12 stops conveying briefly to load and hang the wax trees. The two wax trees that have been hung before are respectively located directly above the slurry hanging tube 8 and the sand spreading tube 81, and slurry is hung and sanded respectively, which plays a role in loading the wax trees; at the same time, when unloading the wax trees, after the wax trees that have completed shell making are hung and transported above the receiving seat 92, the ring conveyor 12 stops conveying briefly, and the finished wax trees are removed and replaced with semi-finished products, which plays a role in unloading the finished wax trees.

[0038] Working process: In the lost wax casting shell making technology, taking the barbecue grill shell making as an example, first use a wax injection machine to press the liquid wax into the metal mold, take out the wax mold of the barbecue grill after cooling, and weld multiple wax molds to form a wax tree, and then hang the wax tree at the bottom end of the electric cylinder 14. The fixed column 11 on the machine base 1 supports the ring conveyor 12. As the ring conveyor 12 and the electric heater 16 start to work, the multiple output ends of the electric heater 16 supply heat to the inside of the drying box 15. The conveyor belt of the ring conveyor 12 synchronously drives the multiple fixed blocks 13 to rotate in a ring. During the rotation, the wax tree is slurried and sanded. Then the electric cylinder 14 automatically adjusts the height of the suspended wax tree according to the inlet and outlet heights, and the sanded wax tree is The hanging wax trees are sent into the drying box 15, and the multiple output ends of the electric heater 16 blow hot air from the inner wall of the drying box 15 to the hanging wax trees, so as to dry and solidify the wax trees. The dried and solidified wax trees leave the drying box 15 as the ring conveyor 12 continues to transport them, and then the slurry coating, sanding and drying and solidification are repeated until the shell thickness meets the standard, that is, the shell making is completed, which plays the role of drying and shelling the barbecue rack wax trees without stopping, and reduces the situation where the powder on the surface of the wax mold is difficult to adhere firmly due to the workpiece not being dried and solidified after sanding; the multiple output ends of the electric heater 16 are located at the four corners of the inner wall of the drying box 15, which can simultaneously dry the wax trees evenly from different angles, and the symmetrical air supply at the four corners can form a vertical The circulating airflow avoids uneven drying caused by unilateral air supply and prevents stress cracks in the shell due to excessive local drying, thereby improving the drying and curing effect of the wax tree; the hot air generated at the output end of the electric heater 16 penetrates the wax tree gap from multiple angles, accelerates the evaporation of water in the slurry layer, and shortens the drying time compared to static drying; the wax tree composed of the grill is hung and transported by the ring conveyor 12 for drying and curing, which can avoid the wax tree from adhering to the contact surface, and with the help of mild convection hot air, it can ensure drying efficiency and reduce the risk of deformation of the wax mold; when the wax tree composed of the grill is hung to make a shell, the wax tree is fixed to the end of the No. 1 rotating rod 21 away from the roller 22, and the bending plate 2 is fixed to the bottom of the electric cylinder 14 The end supports the No. 1 rotating rod 21. As the wax tree is coated with slurry and sanded and sent into the drying box 15, the roller 22 can be rotated by a tool. The roller 22 synchronously drives the wax tree suspended on the No. 1 rotating rod 21 to rotate on the inner wall of the curved plate 2, presenting a circular hanging and rotating drying. In the rotating state, all surfaces of the wax tree, including the complex inner cavity structure, can be evenly exposed to the hot air, eliminating the stress cracks of the shell caused by local uneven drying; the centrifugal effect generated by the rotation can enhance the penetration of the hot air into the gap between the modules, and the evaporation efficiency of the water in the slurry layer is improved; the rotating wax tree can prevent the undried slurry from gathering downward due to gravity, and reduce the slurry accumulation at the bottom of the wax tree when the wax tree is hung and horizontally fed for drying, thereby ensuring the thickness of the shell layer;When the wax tree is hung and sent into the drying box 15 for drying and solidification, the wax tree is hung and transported into the drying box 15, and the No. 1 fixed rod 3 first slides into the main groove of the two limiting chutes on the roller 22. As the wax tree continues to slide, the No. 1 fixed rod 3 slides in the main groove, driving the roller 22 to rotate, and the wax tree also rotates forwardly. Subsequently, when the roller 22 slides to the No. 2 fixed rod 31, the No. 2 fixed rod 31 slides into the auxiliary groove of the two limiting chutes, driving the wax tree to rotate in the opposite direction. Due to the different depths of the main groove and the auxiliary groove, the No. 1 fixed rod 3 and the No. 2 fixed rod 31 can continue to slide in one groove during the sliding process, thereby driving the wax tree to rotate in both directions in the drying box 15 for drying and solidification. By rotating the wax tree alternately in forward and reverse directions to dry instead of rotating in a single direction, the bidirectional rotation can offset the unidirectional migration of the slurry caused by centrifugal force; when the wax tree is hung, the connecting seat 4 cooperates with the No. 2 rotating rod 41 to be fixed on the No. 1 rotating rod 21 away from The bottom of the hanging seat 42 is fixed to the bottom of the second rotating rod 41 for docking and hanging the wax tree. A plurality of wax molds are welded to both sides of the fixing frame 44 to form a wax tree. The threaded column 43 fixed on the handheld fixing frame 44 is screwed into the bottom of the hanging seat 42 for fixing, thereby realizing the hanging of the wax tree. At the same time, when the shell is completed, the threaded column 43 is screwed down in the reverse direction to unscrew the threaded column 43; when the wax tree is sent to the drying box 15 for drying and solidification, the turntable 5 fixed on the second rotating rod 41 is rubbed against the outer wall of the friction plate 51, and the anti-slip pad 52 increases the friction force with the surface of the turntable 5, so that the suspended wax tree remains in a horizontal state for rotation and drying. When rotating horizontally, gravity always acts perpendicularly to the axial direction of the wax tree, so that the slurry is evenly distributed in the circumferential direction, which can avoid the accumulation of slurry at the lower end when it is vertically suspended; at the same time, the centrifugal force generated by the horizontal rotation of the wax tree can timely throw off the excess sand particles that are not bonded, and maintain the surface roughness;

[0039] When the wax tree is hung and transported into the drying box 15 for drying and curing, four rotating shafts 6, which are opposite to each other in pairs, are respectively located at the openings at both ends of the drying box 15. A sealing plate 61 is installed on each rotating shaft 6. The four sealing plates 61 seal the openings at both ends of the drying box 15, thereby reducing the heat loss in the drying box 15 and ensuring the drying and curing temperature in the drying box 15. At the same time, when the wax tree is hung and transported to the opening of the drying box 15, the turntable 5 can squeeze the two sealing plates 61 at the front end of the wax tree to open the opening of the drying box 15 along with the two rotating shafts 6. The torsion spring contracts and is stressed until the roller 22 enters the interior of the drying box 15. The elastic force of the torsion spring drives the rotating shaft 6 and the sealing plate 61 to rotate and reset, thereby playing the role of adaptively opening and closing the openings at both ends of the drying box 15.

[0040] When the wax tree is heated and solidified inside the drying box 15, two sealing pads 7 made of silicone rubber are fixed relatively to the opening above the drying box 15 to seal it, which can reduce the loss of heat inside the drying box 15. When the curved plate 2 is suspended and slid to the sealing pads 7, the curved plate 2 can squeeze the two sealing pads 7 to ensure that the curved plate 2 can normally suspend the wax tree and transport it into the drying box 15.

[0041] When the wax tree composed of the wax model of the barbecue grill is slurried and sanded, the wax tree is suspended and transported to the top of the slurry hanging drum 8, and the output end of the electric cylinder 14 drives the suspended wax tree to descend, and the wax tree then enters the slurry hanging drum 8 for slurrying. Subsequently, the output end of the electric cylinder 14 drives the wax tree to rise and continue to be transported. When the wax tree after slurrying is sent to the top of the sand-spreading drum 81, the output end of the electric cylinder 14 descends again, and the wax tree enters the sand-spreading drum 81 for sanding. Subsequently, the output end of the electric cylinder 14 drives the wax tree to rise and continue to be transported to the drying box 15 for drying, which plays the role of slurrying and sanding the wax tree; when the wax tree is hung and transported for slurrying, the wax tree goes deep into the slurry hanging drum 8 for slurrying, and then the wax tree is lifted up by the electric cylinder 14 and continues to be transported. At this time, the No. 3 fixed rod 91 fixed by the fixed seat 9 corresponds to the limiting slide groove of the rotating roller 22, driving the wax tree with slurry to rotate. Dynamic rotation can destroy the thixotropic structure of the slurry and reduce the teardrop-shaped slurry accumulation generated when it is vertically suspended;

[0042] When loading multiple wax trees, the multiple wax trees are placed on the receiving seat 92 in sequence. As the hanging seat 42 suspends and transports them to a position above the receiving seat 92, the ring conveyor 12 stops conveying briefly to load and hang the wax trees. The two wax trees that have been hung previously are respectively located directly above the slurry hanging tube 8 and the sand spreading tube 81, for slurry hanging and sand spreading, respectively, which plays the role of loading the wax trees. At the same time, when unloading the wax trees, after the wax trees that have completed shell making are hung and transported to the top of the receiving seat 92, the ring conveyor 12 stops conveying briefly, and the finished wax trees are removed and replaced with semi-finished products, which plays the role of unloading the finished wax trees.

[0043] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A lost wax casting shell making device, characterized in that: The machine comprises a base; two fixing columns are fixedly connected to the top of the base; a ring conveyor is fixedly connected to the fixing columns, and the two fixing columns are supported on the bottom of the ring conveyor; a plurality of fixing blocks are fixedly connected to the bottom of the conveyor belt of the ring conveyor; an electric cylinder is fixedly connected to the bottom end of each fixing block; a drying box is fixedly connected to the side of the machine base close to the ring conveyor; an electric heater is fixedly connected to the interior of the drying box, and the electric heater is provided with multiple output terminals, and the multiple output terminals of the electric heater are respectively located at the four corners of the inner wall of the drying box; The bottom end of the electric cylinder is fixedly connected to a curved plate; the bottom inner wall of the curved plate is rotatably connected to a first rotating rod; one end of the first rotating rod is fixedly connected to a rotating roller; The rotating roller is provided with two opposite and crossed limiting chutes, and the two limiting chutes are divided into a main chute and a secondary chute, and the depth of the main chute is deeper than that of the secondary chute; the inner wall of the drying box is fixedly connected with a No. 1 fixed rod and a No. 2 fixed rod, respectively, and the No. 1 fixed rod and the No. 2 fixed rod are opposite and spaced apart, and the No. 1 fixed rod and the No. 2 fixed rod correspond to the two limiting chutes respectively.

2. The shell-making device of lost wax casting according to claim 1, characterized in that: The end of the No. 1 rotating rod away from the roller is fixedly connected to a connecting seat; the bottom of the connecting seat is rotatably connected to the No. 2 rotating rod; the bottom end of the No. 2 rotating rod is fixedly connected to a hanging seat; the bottom end of the hanging seat is threadedly connected to a threaded column; the bottom end of the threaded column is fixedly connected to a fixing frame.

3. The shell-making device of lost wax casting according to claim 2, characterized in that: A turntable is fixedly connected to the outer wall of the second rotating rod; a friction plate is fixedly connected to the inner wall of the drying box and one side close to the first fixed rod; and an anti-slip pad is fixedly connected to the outer wall of the friction plate.

4. The shell-making device of lost wax casting according to claim 3, characterized in that: The openings at both ends of the drying box are connected to rotating shafts via torsion springs so as to rotate relative to each other; a blocking plate is fixedly connected to the outer wall of the rotating shaft, and an inclined surface is provided on the opposite side of the two blocking plates.

5. The shell-making device of lost wax casting according to claim 4, characterized in that: Two sealing pads are relatively fixedly connected to the drying box; the material of the sealing pads is silicone rubber.

6. The shell-making device of lost wax casting according to claim 5, characterized in that: A slurry hanging cylinder is fixedly connected to the side of the machine base away from the drying box; and a sand spreading cylinder is fixedly connected to the side of the machine base close to the slurry hanging cylinder.

7. The shell-making device of lost wax casting according to claim 6, characterized in that: A fixing seat is fixedly connected to one side of the drying box close to the pulp hanging cylinder; a No. 3 fixing rod is fixedly connected to the outer wall of the fixing seat, and the No. 3 fixing rod corresponds to a limiting sliding groove.

8. The shell-making device of lost wax casting according to claim 7, characterized in that: A receiving seat is fixedly connected to the machine base; the receiving seat is located on a side of the slurry hanging cylinder away from the sand spreading cylinder.

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