Wax mold 3d printing equipment for precision casting parts manufacturing

Abstract

The application relates to the technical field of wax mold printing, in particular to a wax mold 3D printing device for precision casting part manufacturing, which comprises a printer bin and a wax cylinder for supplying liquid wax to the printer bin, the outside of the wax cylinder is provided with a pressure synchronization cylinder, a temperature control horizontal cylinder is arranged on the pressure synchronization cylinder, the temperature control horizontal cylinder penetrates the side wall of the pressure synchronization cylinder and is communicated with the wax cylinder, and an opening and closing valve disc is arranged at the end of the temperature control horizontal cylinder; when the liquid wax in the wax cylinder is insufficient, the wax is supplemented through the pressure synchronization cylinder without affecting printing, compared with the wax supplementing mode of using an additional wax cylinder in the traditional technology, the wax can be quantitatively controlled according to the required amount of the wax cylinder, and the remaining wax particles are completely saved in a wax storage hopper, so that the wax can be recycled.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wax mold printing, in particular to a wax mold 3D printing device for precision casting part manufacturing. BACKGROUND

[0002] The wax mold 3D printing device is a special device for producing wax molds required for precision casting of automobile parts. The digital part model is directly formed into a wax mold with complex geometric structure by layer-by-layer accumulation of wax-based materials, providing a master mold for the subsequent precision casting process. Since automobile parts such as turbine blades and complex chassis connecting parts are large in volume and irregular in shape, the volume estimation error of the parts is large, and therefore the wax material in the wax cylinder may be insufficient during the 3D printing process.

[0003] Most of the wax cylinder feeding methods on the market are through the action of gas pressure on the wax cylinder, using gas pressure to force liquid wax to flow out to supply wax to the printer tank. Once the cylinder is opened to replenish wax during printing, the gas pressure will disappear, the wax supply will be interrupted, and the printing will be forced to stop. The impact of printing interruption is more serious, increasing the part forming error, and even leading to part printing failure. In the prior art, an additional wax cylinder is provided, which melts the wax in the additional wax cylinder and maintains a consistent pressure to replenish wax into the wax cylinder. However, the additional wax cylinder will melt all the wax inside it, and since some custom parts are large in volume and irregular in shape, the volume estimation error of the parts is large, and the volume of the required wax replenishment can only be estimated with sufficient margin, often leading to the fact that the wax liquid in the additional wax cylinder cannot be used up and is in a molten state, making it difficult to recover. SUMMARY

[0004] The present application aims to provide a wax mold 3D printing device for precision casting part manufacturing to solve the problem of difficult recovery of wax in the additional wax cylinder as described in the background.

[0005] In order to achieve the above object, the present application provides the following technical scheme: the wax mold 3D printing equipment for precision casting parts manufacturing, including printer warehouse and wax cylinder for supplying liquid wax to printer warehouse, the outside of the wax cylinder is provided with pressure synchronization cylinder, the pressure synchronization cylinder is provided with temperature control horizontal cylinder, the temperature control horizontal cylinder communicates with the wax cylinder through the side wall of the pressure synchronization cylinder, the end of the temperature control horizontal cylinder is provided with an opening and closing valve disc, the opening and closing valve disc controls the temperature control horizontal cylinder through axial movement; the inside of the pressure synchronization cylinder is fixedly provided with a wax melting pot, a crushing cover cylinder and a wax material storage hopper, the wax melting pot communicates with the temperature control horizontal cylinder, and the wax material particles are stored in the wax material storage hopper; the pressure synchronization cylinder can adjust the internal gas pressure, when it is necessary to supplement the wax in the wax cylinder, the gas pressure in the pressure synchronization cylinder and the wax cylinder is controlled to be consistent, the wax material particles in the wax material storage hopper are crushed through the crushing cover cylinder and then sent into the wax melting pot for melting, the liquid wax flows into the temperature control horizontal cylinder for temperature control, and the wax is supplemented into the wax cylinder under the condition that the temperature control horizontal cylinder is opened.

[0006] The center position of the wax melting pot is provided with a conical center cover, and the lower portion of the conical center cover is provided with an array of legs, and the conical center cover is fixedly installed with the inner wall surface of the wax melting pot through the array of legs.

[0007] The conical center cover and the side wall of the wax melting pot are respectively embedded with a wax melting heating coil, the conical center cover and the wax melting pot are heated through the wax melting heating coil, and the crushed wax material falling in the crushing cover cylinder is sequentially heated and melted through the conical center cover and the wax melting pot.

[0008] The inside of the pressure synchronization cylinder is further provided with a rotating main shaft, one end of the rotating main shaft penetrates through the wax material storage hopper and extends into the crushing cover cylinder; the crushing cover cylinder is provided with a crushing blade, and the rotating main shaft can drive the crushing blade to rotate, so that the crushing cover cylinder can crush the wax material particles passing through the inside of the crushing cover cylinder.

[0009] The outside of the rotating main shaft is further provided with a centrifugal gate mechanism, and the centrifugal gate mechanism blocks the lower portion of the wax material storage hopper; when the rotating main shaft is in a stationary state or the rotating speed is lower than a set threshold value, the centrifugal gate mechanism closes the lower portion of the wax material storage hopper, so that the wax material in the wax material storage hopper does not fall into the crushing cover cylinder; when the rotating speed of the rotating main shaft exceeds the set threshold value, the centrifugal gate mechanism is opened, so that the wax material in the wax material storage hopper falls into the crushing cover cylinder.

[0010] The centrifugal gate mechanism comprises a centrifugal track arm and a normally closed gate, the centrifugal track arm is fixedly arranged outside the rotating main shaft, and the centrifugal track arm penetrates through the normally closed gate to limit and support the normally closed gate; when the normally closed gate moves to the position of the rotating main shaft, the lower portion of the wax material storage hopper is blocked and closed by the normally closed gate; when the normally closed gate moves away from the rotating main shaft, the lower portion of the wax material storage hopper is opened.

[0011] The end of the centrifugal orbit arm is fixedly provided with a vertical arm, the normally closed gate plate is fixedly provided with a gate plate shaft, the gate plate shaft penetrates through the vertical arm, the outside of the gate plate shaft is sleeved with a gate plate spring, the gate plate spring applies elastic pressure to the normally closed gate plate, so that the normally closed gate plate has a tendency to move towards the direction of the rotating main shaft.

[0012] The end of the rotating main shaft is provided with a split shaft, the split shaft corresponds to the rotating main shaft coaxially, the split shaft can rotate relative to the rotating main shaft, the crushing blade is fixedly installed on the split shaft, and the rotating main shaft drives the crushing blade to rotate through the split shaft.

[0013] The inside of the rotating main shaft is provided with a main shaft inner cavity, the main shaft inner cavity is provided with an adjusting sleeve, a limiting wall groove is formed in the inner wall of the main shaft inner cavity, a sleeve convex rib is fixedly arranged on the outer wall of the adjusting sleeve, and the sleeve convex rib is limitedly arranged in the limiting wall groove. Through the limiting cooperation of the limiting wall groove and the sleeve convex rib, the adjusting sleeve can move axially along the main shaft inner cavity and cannot rotate relatively.

[0014] The main shaft inner cavity is provided with a screw rod inner shaft, the screw rod inner shaft is fixedly installed with the split shaft, the screw rod inner shaft penetrates through the adjusting sleeve and is in screw cooperation with the adjusting sleeve, when the screw rod inner shaft rotates relative to the rotating main shaft, the adjusting sleeve moves axially for adjustment.

[0015] The inside of the main shaft inner cavity is fixedly provided with a separation inner ring, the separation inner ring is provided below with a reset torsion spring, and the two ends of the reset torsion spring are fixedly connected with the separation inner ring and the split shaft respectively, so that the split shaft has an elastic tendency of reset rotation relative to the rotating main shaft. The number of the centrifugal orbit arms is two groups and is symmetrically distributed, a fixed counterweight is fixedly arranged on one group of the centrifugal orbit arms, and a dynamic counterweight is movably arranged on the other group of the centrifugal orbit arms. An adjusting steel rope is connected between the dynamic counterweight and the adjusting sleeve, and when the adjusting sleeve moves axially, the dynamic counterweight can be driven to adjust the position.

[0016] The side wall of the temperature control transverse cylinder is embedded with a temperature control heating coil, the temperature control transverse cylinder is heated by the temperature control heating coil, so that the temperature control transverse cylinder can control the temperature of the liquid wax.

[0017] The surface of the wax storage hopper is attached with an external temperature insulation sleeve.

[0018] The surface of the opening and closing valve disc is fixedly provided with a valve disc control shaft, the valve disc control shaft penetrates through the end of the temperature control transverse cylinder and the side wall of the pressure synchronizing cylinder and extends to the outside of the pressure synchronizing cylinder, an L-shaped support is fixedly arranged on the valve disc control shaft, an extension controller is fixedly arranged at the bottom of the pressure synchronizing cylinder, and the extension controller is used to drive the L-shaped support to move, so as to drive the valve disc control shaft to move axially.

[0019] A wax mold 3D printing process for precision casting parts manufacturing, which adopts a wax mold 3D printing equipment for precision casting parts manufacturing, comprising the following steps:

[0020] Step one, supply liquid wax to the printer bin through the wax cylinder for printing;

[0021] Step two, when the liquid wax in the wax cylinder is insufficient, first control the gas pressure in the pressure synchronization cylinder and the wax cylinder to be consistent, and control the opening and closing valve disc to open;

[0022] Step three, the wax particles in the wax storage hopper are crushed by the crushing cover cylinder, melted by the wax melting hopper, flow into the temperature control horizontal cylinder, and then enter the wax cylinder for wax replenishment.

[0023] Compared with the prior art, the beneficial effects of the present application are:

[0024] 1、The present application can replenish wax in the wax cylinder without affecting printing when the liquid wax in the wax cylinder is insufficient, and compared with the traditional technology of replenishing wax by using an additional wax cylinder, the present application can quantitatively control the replenishment of wax according to the required amount of the wax cylinder by cooperating the wax storage hopper, crushing cover cylinder and wax melting hopper, etc., and the remaining wax particles are completely saved in the wax storage hopper, avoiding the complete melting of the wax particles and facilitating recycling.

[0025] 2、The centrifugal gate mechanism can adapt to the working state of the rotating spindle, and can control the opening and closing of the wax storage hopper, and only needs to control the rotation start and stop of the rotating spindle to complete the opening and closing control of the discharging at the same time, thereby reducing the electrical control cost.

[0026] 3、The present application can adjust the rotation amplitude of the rotating spindle according to the load change of the crushing blade by cooperating the split shaft, adjusting sliding sleeve and dynamic counterweight, etc., when the crushing blade is empty, the rotation amplitude of the rotating spindle is automatically increased, the rotation of the rotating spindle is vibrated to improve the smoothness of the discharging, and vice versa when the crushing blade is heavy, the rotation amplitude of the rotating spindle is reduced to reduce the promoting effect of the rotating spindle vibration on the discharging. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0028] Figure 2 It is a schematic diagram of the wax cylinder and the pressure synchronization cylinder.

[0029] Figure 3 It is a front view of the wax cylinder and the pressure synchronization cylinder.

[0030] Figure 4The internal structure display diagram of the wax cylinder and the pressure synchronization cylinder of the present application.

[0031] Figure 5 The three-dimensional half-section schematic diagram of the wax cylinder and the pressure synchronization cylinder of the present application.

[0032] Figure 6 The three-dimensional half-section front view of the pressure synchronization cylinder of the present application.

[0033] Figure 7 The structure schematic diagram of the rotating main shaft of the present application.

[0034] Figure 8 The three-dimensional half-section schematic diagram of the rotating main shaft of the present application.

[0035] Figure 9 The three-dimensional half-section schematic diagram of the internal cavity of the main shaft of the present application.

[0036] In the figure: 1, printer bin; 2, wax cylinder; 3, pressure synchronization cylinder; 4, temperature control horizontal cylinder; 5, on-off valve disc; 6, molten wax hopper; 7, crushing cover cylinder; 8, wax material storage hopper; 601, conical center cover; 602, array support leg; 603, molten wax heating coil; 9, rotating main shaft; 901, crushing blade; 902, centrifugal track arm; 903, normally closed gate plate; 904, vertical arm; 905, gate plate shaft; 906, gate plate spring; 907, split shaft; 908, main shaft internal cavity; 909, adjusting sliding sleeve; 910, limiting wall groove; 911, sliding sleeve convex rib; 912, screw internal shaft; 913, separation internal ring; 914, reset torsional spring; 915, fixed counterweight; 916, dynamic counterweight; 917, adjusting steel rope; 401, temperature control heating coil; 501, valve disc control shaft; 502, L-shaped support; 503, telescopic controller; 801, external temperature insulation sleeve; 101, equipment rack; 102, temperature controller; 103, main unit; 201, stirring blade shaft; 202, pneumatic motor; 203, outer wall heating coil; 204, output wax pipe; 205, first air pressure control pipe; 206, stabilizing wall plate; 301, main shaft motor; 302, second air pressure control pipe. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0038] Please refer to Figures 1 to 9This invention provides a technical solution: a wax model 3D printing device for precision casting parts manufacturing, including a printer chamber 1 and a wax tank 2 for supplying liquid wax to the printer chamber 1, such as... Figure 1 As shown, an equipment frame 101 is provided on the outside of the printer compartment 1. The printer compartment 1 is supported and placed by the equipment frame 101. A temperature controller 102 and a host unit 103 are fixed on the equipment frame 101 by screws. The host unit 103 is used to program and control the printer compartment 1, the temperature controller 102 and the wax tank 2. The host unit 103 will not be described in detail in this application.

[0039] The wax cylinder 2 feeds liquid wax into the printer compartment 1 through a double-layered tube. The double-layered tube is a structure in which a large-diameter pipe is fitted with a small-diameter pipe and there is a gap between the two. Heating oil is placed in the gap between the large-diameter pipe and the small-diameter pipe. The temperature of the heating oil is controlled by the temperature controller 102, so that the molten wax does not solidify when it is fed into the printer compartment 1 through the double-layered tube.

[0040] The printer compartment 1 includes a main wax nozzle and a support wax nozzle. Both the main wax nozzle and the support wax nozzle are controlled for printing movement via X-axis, Y-axis, and Z-axis motion control arms. This is a traditional 3D printing drive system, which will not be described further in this application. Figure 1 As shown in the figure, the wax cylinder 2 in this invention is provided with two sets, namely the main wax nozzle and the support wax nozzle for feeding. The two sets of wax cylinder 2 are respectively filled with support wax and molding wax. The two have different melting points. The molding wax constitutes the parts, and the support wax is used to support the parts that are prone to collapse. After printing is completed, the support wax is removed by taking advantage of the lower melting point of the support wax.

[0041] like Figure 4 As shown, a stirring blade shaft 201 is installed inside the wax tank 2, and a pneumatic motor 202 is installed on the upper part of the wax tank 2. By inputting compressed air into the pneumatic motor 202, the pneumatic motor 202 is made to run, driving the stirring blade shaft 201 to rotate and stir the wax liquid in the wax tank 2, so that the wax is more uniform and the problem of layering is reduced during the wax supply process.

[0042] An outer wall heating coil 203 is wound around the outer surface of the wax cylinder 2. When the outer wall heating coil 203 is energized, it can generate heat, thereby enabling the wax cylinder 2 to heat the wax liquid inside.

[0043] A pressure synchronizing cylinder 3 is installed on the outside of the wax cylinder 2, such as... Figure 4As shown in the figure, the wax cylinder 2 is also provided with an output wax pipe 204, and a first air pressure control pipe 205 is arranged in communication with the upper part of the wax cylinder 2. The compressed gas is input into the wax cylinder 2 through the first air pressure control pipe 205, so that the wax liquid in the wax cylinder 2 is discharged to the outside through the output wax pipe 204 under the action of pressure, so as to realize the supply to the printer cartridge 1. As shown in the figure, Figure 2 As shown in the figure, a stabilizing wall plate 206 is fixedly arranged between the wax cylinder 2 and the pressure synchronization cylinder 3, so that the position of the pressure synchronization cylinder 3 is more stable. The temperature control horizontal cylinder 4 is arranged on the pressure synchronization cylinder 3 and communicates with the wax cylinder 2 through the side wall of the pressure synchronization cylinder 3. The end of the temperature control horizontal cylinder 4 is provided with an opening and closing valve disc 5, which controls the on-off of the temperature control horizontal cylinder 4 through axial movement.

[0044] The inside of the pressure synchronization cylinder 3 is fixedly provided with a wax melting hopper 6, a crushing cover cylinder 7 and a wax material storage hopper 8. The wax melting hopper 6 communicates with the temperature control horizontal cylinder 4, and the wax material particles are stored in the wax material storage hopper 8. The pressure synchronization cylinder 3 can adjust the internal gas pressure. When it is necessary to supplement the wax in the wax cylinder 2, the gas pressure in the pressure synchronization cylinder 3 is controlled to be consistent with that in the wax cylinder 2. After the wax material particles in the wax material storage hopper 8 are crushed through the crushing cover cylinder 7, they are sent into the wax melting hopper 6 to be melted. The liquid wax flows into the temperature control horizontal cylinder 4 to be temperature controlled. In the open state of the temperature control horizontal cylinder 4, the wax is supplemented into the wax cylinder 2.

[0045] A conical center cover 601 is arranged at the center position of the wax melting hopper 6. An array of legs 602 is arranged below the conical center cover 601. The conical center cover 601 is fixedly arranged with the inner wall surface of the wax melting hopper 6 through the array of legs 602.

[0046] The conical center cover 601 and the side wall of the wax melting hopper 6 are respectively embedded with a wax melting heating coil 603. The conical center cover 601 and the wax melting hopper 6 are heated through the wax melting heating coil 603. The crushed wax material falling in the crushing cover cylinder 7 is heated and melted in sequence through the conical center cover 601 and the wax melting hopper 6.

[0047] The inside of the pressure synchronization cylinder 3 is also provided with a rotating main shaft 9. One end of the rotating main shaft 9 penetrates through the wax material storage hopper 8 and extends into the crushing cover cylinder 7. Figure 5As shown in the middle, the main shaft motor 301 is fixedly installed at the upper portion of the pressure synchronization cylinder 3, the main shaft motor 301 is in transmission connection with the rotating main shaft 9, and the rotating main shaft 9 is driven to rotate by the main shaft motor 301; the second gas pressure control pipe 302 is arranged on the surface of the pressure synchronization cylinder 3 in communication, and the gas pressure in the pressure synchronization cylinder 3 is controlled through the second gas pressure control pipe 302. The gas pressure sensor is arranged in the wax cylinder 2 and the pressure synchronization cylinder 3 respectively, so as to realize closed-loop control, so that the gas pressure control in the wax cylinder 2 and the pressure synchronization cylinder 3 is more accurate, and the liquid level sensor is also arranged in the wax cylinder 2, which is used for monitoring the wax liquid level in the wax cylinder 2; the crushing blade 901 is arranged in the crushing cover cylinder 7, the rotating main shaft 9 can drive the crushing blade 901 to rotate, so that the crushing cover cylinder 7 can crush the wax material particles passing through the inside of the crushing cover cylinder 7.

[0048] The outer portion of the rotating main shaft 9 is also provided with a centrifugal gate mechanism, the centrifugal gate mechanism blocks the lower portion of the wax material storage hopper 8, when the rotating main shaft 9 is in a static state or the rotating speed is lower than a set threshold value, the centrifugal gate mechanism closes the lower portion of the wax material storage hopper 8, at this time, the wax material in the wax material storage hopper 8 will not fall into the crushing cover cylinder 7; when the rotating speed of the rotating main shaft 9 exceeds the set threshold value, the centrifugal gate mechanism will be opened, so that the wax material in the wax material storage hopper 8 falls into the crushing cover cylinder 7.

[0049] The centrifugal gate mechanism comprises a centrifugal track arm 902 and a normally closed gate 903, the centrifugal track arm 902 is fixedly arranged on the outer portion of the rotating main shaft 9, the centrifugal track arm 902 penetrates through the normally closed gate 903 to limit and support the normally closed gate 903, when the normally closed gate 903 moves to the position in the direction of the rotating main shaft 9, the lower portion of the wax material storage hopper 8 is blocked and closed by the normally closed gate 903, when the normally closed gate 903 moves away from the rotating main shaft 9, the lower portion of the wax material storage hopper 8 is opened.

[0050] The end portion of the centrifugal track arm 902 is fixedly provided with a vertical arm 904, the normally closed gate 903 is fixedly provided with a gate shaft 905, the gate shaft 905 penetrates through the vertical arm 904, the outer portion of the gate shaft 905 is sleeved with a gate spring 906, the gate spring 906 applies elastic pressure to the normally closed gate 903, so that the normally closed gate 903 has a tendency to move in the direction of the rotating main shaft 9.

[0051] The end portion of the rotating main shaft 9 is provided with a split shaft 907, the split shaft 907 is coaxial with the rotating main shaft 9, the split shaft 907 can rotate relative to the rotating main shaft 9, the crushing blade 901 is fixedly installed on the split shaft 907, and the rotating main shaft 9 drives the crushing blade 901 to rotate through the split shaft 907.

[0052] The interior of the rotating main shaft 9 is provided with a main shaft inner cavity 908, and the main shaft inner cavity 908 is provided with an adjusting sliding sleeve 909. A limiting wall groove 910 is formed in the inner wall of the main shaft inner cavity 908. A sliding sleeve protruding rib 911 is fixedly arranged on the outer wall of the adjusting sliding sleeve 909, and the sliding sleeve protruding rib 911 is limitedly arranged in the limiting wall groove 910. The limiting wall groove 910 and the sliding sleeve protruding rib 911 are limitedly matched, so that the adjusting sliding sleeve 909 can move axially along the main shaft inner cavity 908 and cannot rotate relatively.

[0053] The main shaft inner cavity 908 is provided with a screw rod inner shaft 912, and the screw rod inner shaft 912 is fixedly installed with the split shaft 907. The screw rod inner shaft 912 penetrates through the adjusting sliding sleeve 909 and is screwingly matched with the adjusting sliding sleeve 909. When the screw rod inner shaft 912 rotates relative to the rotating main shaft 9, the adjusting sliding sleeve 909 moves axially.

[0054] The main shaft inner cavity 908 is fixedly provided with a separation inner ring 913, and the separation inner ring 913 is provided below with a reset torsion spring 914. The two ends of the reset torsion spring 914 are fixedly connected with the separation inner ring 913 and the split shaft 907 respectively, so that the split shaft 907 has an elastic tendency of reset rotation relative to the rotating main shaft 9.

[0055] The number of the centrifugal track arms 902 is two groups, and they are symmetrically distributed. A fixed counterweight 915 is fixedly arranged on one group of the centrifugal track arms 902, and a dynamic counterweight 916 is movably arranged on the other group of the centrifugal track arms 902. The dynamic counterweight 916 and the adjusting sliding sleeve 909 are connected with an adjusting steel wire 917. When the adjusting sliding sleeve 909 moves axially, the dynamic counterweight 916 can be adjusted in position.

[0056] A temperature control heating coil 401 is embedded and installed in the side wall of the temperature control horizontal cylinder 4. The temperature control heating coil 401 heats the temperature control horizontal cylinder 4, so that the temperature control horizontal cylinder 4 can control the temperature of the liquid wax. An external temperature insulation sleeve 801 is attached to the surface of the wax storage hopper 8. The external temperature insulation sleeve 801 is made of heat insulation material, which can prevent the wax in the wax storage hopper 8 from melting due to heating.

[0057] A valve disc control shaft 501 is fixedly arranged on the surface of the open-close valve disc 5. The valve disc control shaft 501 penetrates through the end of the temperature control horizontal cylinder 4 and the side wall of the pressure synchronization cylinder 3, and extends to the outside of the pressure synchronization cylinder 3. An L-shaped bracket 502 is fixedly arranged on the valve disc control shaft 501. An extension controller 503 is fixedly arranged at the bottom of the pressure synchronization cylinder 3. The extension controller 503 is used to drive the L-shaped bracket 502 to move, so as to drive the valve disc control shaft 501 to move axially.

[0058] A wax mold 3D printing process for precision casting parts manufacturing, which adopts a wax mold 3D printing equipment for precision casting parts manufacturing, comprising the following steps:

[0059] Step one, print by supplying liquid wax from wax tank 2 to printer tank 1;

[0060] Step two, when the liquid wax in wax tank 2 is insufficient, first control the pressure synchronization tank 3 to keep the same pressure with wax tank 2, and control the opening and closing valve disc 5 to open;

[0061] Step three, the wax particles in wax storage hopper 8 are crushed by crushing cover cylinder 7, melted by melting wax hopper 6, flow into temperature control horizontal cylinder 4, and then into wax tank 2 to supplement wax.

[0062] During the printing process, when the liquid wax in wax tank 2 is insufficient, first input compressed air into pressure synchronization tank 3 through second air pressure control pipe 302, so that the pressure in pressure synchronization tank 3 keeps the same with that in wax tank 2; as shown in Figure 5 , control the opening and closing valve disc 5 to move to the left side, at this time the end of temperature control horizontal cylinder 4 is opened, and pressure synchronization tank 3 communicates with wax tank 2 through temperature control horizontal cylinder 4. Since the pressure in pressure synchronization tank 3 is the same as that in wax tank 2, when pressure synchronization tank 3 communicates with wax tank 2, the internal pressure of wax tank 2 will not fluctuate obviously, so as not to affect the printing process.

[0063] Reference Figure 6 and Figure 7 At this time, control the rotation of rotating main shaft 9, when rotating main shaft 9 rotates, the normally closed gate plate 903 will be subjected to centrifugal force outward, when the rotating speed of rotating main shaft 9 reaches a set threshold value, the centrifugal force is greater than the elastic support force of gate spring 906, at this time the normally closed gate plate 903 moves outward, as shown in Figure 7 , the normally closed gate plate 903 is provided with two groups, which block the lower part of wax storage hopper 8, when the two groups of normally closed gate plates 903 separate from each other, the wax particles in wax storage hopper 8 fall into crushing cover cylinder 7 through the gap between the two groups of normally closed gate plates 903; therefore, the above-mentioned set threshold value is related to the elastic force of gate spring 906, the greater the elastic force of gate spring 906, the higher the rotating speed of rotating main shaft 9 is required to make the wax storage hopper 8 discharge, and the elastic force of gate spring 906 is selected according to actual needs.

[0064] The rotation of rotating main shaft 9 can drive the rotation of crushing blade 901, and the high-speed rotation of crushing blade 901 in crushing cover cylinder 7 can crush the wax particles passing through crushing cover cylinder 7, as shown in Figure 6As shown in the figure, the broken wax in the crushing cover cylinder 7 falls on the conical center cover 601, and the conical center cover 601 and the wax melting bucket 6 can be heated and melted in turn by the melting wax heating coil 603, and finally flows into the temperature control horizontal cylinder 4; The standard wax particles for 3D printing of automobile parts wax mold are usually spherical or cylindrical particles, with a diameter of 1-5 mm according to different models, stored in the wax storage hopper 8, crushed by the crushing cover cylinder 7, which can make the wax more crushed, increase the heat exchange area, and be more easily melted.

[0065] As shown in the figure, Figure 6 As shown in the figure, the temperature control horizontal cylinder 4 is temperature controlled by the temperature control heating coil 401, so that the temperature of the liquid wax after passing through the temperature control horizontal cylinder 4 is as close as possible to that of the liquid wax in the wax cylinder 2, reducing the influence of wax supplement on printing.

[0066] The wax in the wax storage hopper 8 of the application will not be completely melted, but will be supplemented in real time according to the need, so that when recycling, the standard wax particles in the wax storage hopper 8 can be directly recycled by opening the pressure synchronization cylinder 3 after pressure relief.

[0067] As shown in the figure, Figure 8 And Figure 9 As shown in the figure, when the rotating main shaft 9 controls the rotation of the crushing blade 901, the rotating main shaft 9 in the application indirectly drives the rotation of the crushing blade 901 through the split shaft 907, and the split shaft 907 can rotate within a certain range relative to the rotating main shaft 9.

[0068] As shown in the figure, Figure 9 As shown in the figure, when the rotating main shaft 9 rotates, the split shaft 907 is rotated by the reset torsional spring 914 transmitting torsional force, so when the wax in the crushing cover cylinder 7 flows at too large a flow rate, the resistance received by the crushing blade 901 and the split shaft 907 during the rotating cutting process is greater, and at this time the reset torsional spring 914 is twisted to a greater extent. During the twisting of the reset torsional spring 914, the screw inner shaft 912 is driven to rotate relative to the rotating main shaft 9 by the split shaft 907, so that the adjusting sleeve 909 is driven to move upward, and the adjusting steel rope 917 pulls the dynamic counterweight 916 to move, at this time the dynamic counterweight 916 moves towards the position of the rotating main shaft 9. In the application, the dynamic counterweight 916 and the fixed counterweight 915 are set so that the position of the fixed counterweight 915 does not change, and the more the dynamic counterweight 916 moves towards the rotating main shaft 9, the more the dynamic counterweight 916 and the fixed counterweight 915 tend to be counterbalanced, and the smaller the rotating vibration amplitude of the rotating main shaft 9, thereby reducing the promoting effect of the vibration of the rotating main shaft 9 on the discharging.

[0069] When the wax flow through the broken cover cylinder 7 is too small, under the reset elastic force of the reset torsion spring 914, the screw inner shaft 912 reverses, so that the adjusting sleeve 909 moves down to reset, at this time the adjusting steel wire 917 is relaxed, and the centrifugal force of the cooperating dynamic counterweight 916 makes the dynamic counterweight 916 move away from the rotating main shaft 9, the farther the dynamic counterweight 916 is from the rotating main shaft 9, the more the dynamic counterweight 916 and the fixed counterweight 915 tend to be out of balance, thereby increasing the amplitude of the rotating main shaft 9 during rotation, and the vibration of the rotating main shaft 9 improves the smoothness of the discharge, realizing self-adaptive flow regulation.

[0070] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A wax mold 3D printing device for precision casting parts manufacturing, comprising a printer bin (1) and a wax tank (2) for supplying liquid wax to the printer bin (1), characterized in that: The outside of the wax cylinder (2) is provided with a pressure synchronization cylinder (3), the pressure synchronization cylinder (3) is provided with a temperature control horizontal cylinder (4), the temperature control horizontal cylinder (4) communicates with the wax cylinder (2) through the side wall of the pressure synchronization cylinder (3), and the end of the temperature control horizontal cylinder (4) is provided with an opening and closing valve disc (5); the opening and closing valve disc (5) controls the temperature control horizontal cylinder (4) by axial movement. The inside of the pressure synchronization cylinder (3) is fixedly provided with a wax melting bucket (6), a crushing cover cylinder (7) and a wax material storage bucket (8), the wax melting bucket (6) communicates with the temperature control horizontal cylinder (4), and the wax material particles are stored in the wax material storage bucket (8); the pressure synchronization cylinder (3) can be adjusted in internal gas pressure, when it is necessary to supplement the wax in the wax cylinder (2), the gas pressure in the pressure synchronization cylinder (3) is controlled to be consistent with that in the wax cylinder (2), the wax material particles in the wax material storage bucket (8) are crushed through the crushing cover cylinder (7) and then are sent into the wax melting bucket (6) to be melted, the liquid wax flows into the temperature control horizontal cylinder (4) to be controlled in temperature, and the wax is supplemented into the wax cylinder (2) under the opening state of the opening and closing valve disc (5). The inside of the pressure synchronization cylinder (3) is further provided with a rotating main shaft (9), one end of the rotating main shaft (9) penetrates through the wax material storage bucket (8) and extends into the crushing cover cylinder (7); the crushing cover cylinder (7) is provided with a crushing blade (901), and the rotating main shaft (9) can drive the crushing blade (901) to rotate, so that the crushing cover cylinder (7) can crush the wax material particles passing through the inside of the crushing cover cylinder (7); the outside of the rotating main shaft (9) is further provided with a centrifugal gate mechanism, the centrifugal gate mechanism is blocked at the lower part of the wax material storage bucket (8), when the rotating main shaft (9) is in a static state or the rotating speed is lower than a set threshold value, the centrifugal gate mechanism closes the lower part of the wax material storage bucket (8), at this time, the wax material in the wax material storage bucket (8) cannot fall into the crushing cover cylinder (7); when the rotating speed of the rotating main shaft (9) exceeds the set threshold value, the centrifugal gate mechanism is opened, so that the wax material in the wax material storage bucket (8) falls into the crushing cover cylinder (7); the centrifugal gate mechanism comprises a centrifugal track arm (902) and a normally closed gate (903), the centrifugal track arm (902) is fixedly arranged outside the rotating main shaft (9), the centrifugal track arm (902) penetrates through the normally closed gate (903) to limit and support the normally closed gate (903), when the normally closed gate (903) moves to the position in the direction of the rotating main shaft (9), the lower part of the wax material storage bucket (8) is blocked and closed by the normally closed gate (903), when the normally closed gate (903) moves away from the rotating main shaft (9), the lower part of the wax material storage bucket (8) is opened.

2. The precision casting wax pattern 3D printing apparatus for manufacturing a wax pattern for a precision casting part according to claim 1, characterized in that: A conical center cover (601) is arranged at the center position of the wax melting bucket (6), and an array support leg (602) is arranged below the conical center cover (601); the conical center cover (601) is fixedly installed with the inner wall surface of the wax melting bucket (6) through the array support leg (602).

3. The wax 3D printing apparatus for manufacturing a precision cast part according to claim 2, wherein: The conical center cover (601) and the side wall of the wax melting pot (6) are respectively embedded with a wax melting heating coil (603), the wax melting heating coil (603) is used for heating the conical center cover (601) and the wax melting pot (6), and the broken wax in the broken cover cylinder (7) is sequentially heated and melted through the conical center cover (601) and the wax melting pot (6).

4. The wax mold 3D printing apparatus for precision casting parts manufacturing according to claim 1, characterized in that: The end of the centrifugal orbit arm (902) is fixedly provided with a vertical arm (904), the normally closed gate plate (903) is fixedly provided with a gate plate shaft (905), the gate plate shaft (905) penetrates through the vertical arm (904), the outside of the gate plate shaft (905) is sleeved with a gate plate spring (906), the gate plate spring (906) applies elastic pressure to the normally closed gate plate (903), so that the normally closed gate plate (903) has a tendency to move towards the direction where the rotating main shaft (9) is located.

5. The wax mold 3D printing apparatus for precision casting parts manufacturing according to claim 1, characterized in that: The end of the rotating main shaft (9) is provided with a split shaft (907), the split shaft (907) corresponds to the rotating main shaft (9) coaxially, the split shaft (907) can rotate relative to the rotating main shaft (9), and the broken blade (901) is fixedly installed on the split shaft (907). The rotating main shaft (9) drives the broken blade (901) to rotate through the split shaft (907).

6. The precision casting wax pattern 3D printing apparatus for manufacturing a wax pattern according to claim 5, wherein: The inside of the rotating main shaft (9) is provided with a main shaft inner cavity (908), the main shaft inner cavity (908) is provided with an adjusting sleeve (909), the inner wall of the main shaft inner cavity (908) is provided with a limiting wall groove (910), the outer wall of the adjusting sleeve (909) is fixedly provided with a sleeve convex rib (911), the sleeve convex rib (911) is limitedly arranged in the limiting wall groove (910), and the limiting wall groove (910) and the sleeve convex rib (911) are limitedly matched, so that the adjusting sleeve (909) can move axially along the main shaft inner cavity (908) and cannot rotate relatively.

7. The precision foundry parts manufacturing wax mold 3D printing apparatus according to claim 6, characterized in that: The main shaft inner cavity (908) is provided with a lead screw inner shaft (912), the lead screw inner shaft (912) is fixedly installed with the split shaft (907), the lead screw inner shaft (912) penetrates through the adjusting sleeve (909) and is screw-connected with the adjusting sleeve (909), when the lead screw inner shaft (912) rotates relative to the rotating main shaft (9), the adjusting sleeve (909) moves axially for adjustment; The inside of the main shaft inner cavity (908) is fixedly provided with a separation inner ring (913), the separation inner ring (913) is provided below with a reset torsion spring (914), and the two ends of the reset torsion spring (914) are fixedly connected with the separation inner ring (913) and the split shaft (907) respectively, so that the split shaft (907) has an elastic tendency of reset rotation relative to the rotating main shaft (9). The number of the centrifugal orbit arms (902) is provided with two groups which are symmetrically distributed, one group of the centrifugal orbit arms (902) is fixedly provided with fixed counterweights (915), the other group of the centrifugal orbit arms (902) is movably provided with dynamic counterweights (916), the dynamic counterweights (916) and the adjusting sliding sleeve (909) are connected and provided with adjusting steel ropes (917), when the adjusting sliding sleeve (909) moves axially, the dynamic counterweights (916) can be adjusted in position.

8. The precision foundry parts manufacturing wax mold 3D printing apparatus according to claim 1, characterized by: The temperature control transverse cylinder (4) is embedded with a temperature control heating coil (401) in the side wall, the temperature control transverse cylinder (4) is heated by the temperature control heating coil (401), so that the temperature control transverse cylinder (4) can control the temperature of the liquid wax; The surface of the wax storage hopper (8) is attached with an external temperature insulation sleeve (801).

9. The precision foundry parts manufacturing wax mold 3D printing apparatus according to claim 1, characterized by: The surface of the opening and closing valve disc (5) is fixedly provided with a valve disc control shaft (501), the valve disc control shaft (501) is sealed through the end of the temperature control transverse cylinder (4) and the side wall of the pressure synchronization cylinder (3), and extends to the outside of the pressure synchronization cylinder (3), the valve disc control shaft (501) is fixedly provided with an L-shaped support (502), the bottom of the pressure synchronization cylinder (3) is fixedly provided with a telescopic controller (503), the telescopic controller (503) is used to drive the L-shaped support (502) to move, so as to drive the valve disc control shaft (501) to move axially.

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