Casting forming process for gold ornaments

Abstract

The invention belongs to the technical field of jewelry casting, and particularly relates to a gold jewelry casting forming process which comprises the following steps: step 10, manufacturing a wax tree, and respectively connecting a plurality of jewelry wax molds to a wax tree trunk through wax tree branches to form the wax tree; 20, a wax tree and the gypsum slurry container are matched to manufacture a gypsum mold, and the gypsum mold is provided with a wax tree cavity; 30, gold casting, wherein liquid gold is cast into the wax tree cavity; 40, the plaster mold is exploded through water cooling, and the gold ornament tree is taken out; and step 50, processing and forming the gold ornament, cleaning the gold ornament tree, and then cutting off the gold ornament. A plurality of gold ornament product cavities are formed in the plaster mold, a plurality of gold ornaments are arranged on a gold ornament tree formed by casting, the casting efficiency can be improved, when a product is upgraded, only an ornament wax mold of a new product needs to be manufactured into a wax tree, a casting mold does not need to be designed, and the cost is reduced. The problems of low production efficiency and high production cost of existing casting production of gold ornaments are solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of jewelry casting, and particularly relates to a casting and forming process for gold jewelry. Background Art

[0002] Gold jewelry combines beauty and value preservation, and is increasingly favored by people. Currently, most gold jewelry is produced by casting processes, with relatively low production efficiency. Moreover, the speed of new product launches for gold jewelry is very fast, which requires the manufacture of new casting molds, resulting in increased production costs. Summary of the Invention

[0003] The purpose of the present invention is to provide a casting and forming process for gold jewelry, aiming to solve the problems of low production efficiency and high production costs in the existing casting production of gold jewelry.

[0004] The present invention discloses a casting and forming process for gold jewelry, which includes the following steps:

[0005] Step 10. Making a wax tree

[0006] Connect a plurality of jewelry wax models to a wax tree trunk through wax tree branches respectively to form a wax tree.

[0007] Step 20. Making a gypsum mold

[0008] Fix the bottom end of the wax tree trunk of the wax tree to the rubber bottom cover of the gypsum slurry container, and then fasten the rubber bottom cover to the bottom end of the steel cup of the gypsum slurry container, so that the wax tree is located inside the steel cup.

[0009] Place a plurality of gypsum slurry containers with the wax trees installed on a support base, and then transfer the support base and the plurality of gypsum slurry containers to a gypsum mixing and filling device. The gypsum mixing and filling device makes gypsum slurry, fills the gypsum slurry into the plurality of gypsum slurry containers, and submerges the wax models into the gypsum slurry.

[0010] After taking out the plurality of gypsum slurry containers filled with gypsum slurry and the support base from the gypsum mixing and filling device, let them solidify. After the gypsum slurry solidifies, remove the rubber bottom cover to separate the rubber bottom cover from the bottom end of the wax tree trunk.

[0011] Next, place the plaster slurry container with the rubber bottom cover removed into a heating furnace for heating. The wax liquid formed after the wax tree melts and fuses flows out from the bottom end of the steel ladle. The plaster inside the plaster slurry container solidifies to form a plaster mold. The plaster mold has a wax tree cavity inside, and the gate of the wax tree cavity is located at the bottom end of the steel ladle. Among them, the cavity part corresponding to the wax tree rod forms the main runner, the cavity part corresponding to the wax tree branches forms the branch runners, and the cavity part corresponding to the jewelry wax mold forms the product cavity.

[0012] Step 30. Gold casting

[0013] After taking out the plaster slurry container and the plaster mold inside it from the heating furnace, turn it over so that the gate is on top, and transfer the hot plaster slurry container and the plaster mold inside it to the casting equipment. The casting equipment pours liquid gold into the wax tree cavity through the gate. After the liquid gold solidifies and forms a shape, take it out.

[0014] Step 40. Water-cooling to break the plaster mold

[0015] Place the plaster slurry container taken out from the casting equipment into water to break the plaster mold inside the plaster slurry container, and take out the gold jewelry tree formed inside the plaster mold.

[0016] Step 50. Processing and forming gold jewelry

[0017] Clean the gold jewelry tree, and then cut off the gold jewelry on the gold jewelry tree.

[0018] As an improvement, in step 40, after water-cooling to break the plaster mold, input the broken plaster pieces formed by the breakage into a plaster piece crushing device to be crushed into a mixed emulsion, and output the mixed emulsion to a screening device for gold recovery.

[0019] As an improvement, in step 50, first pickle the gold jewelry tree with acid, and then wash it with water.

[0020] As an improvement, the gold jewelry casting and forming process further includes: Step 60. Air-dry the cut-off gold jewelry.

[0021] As an improvement, the gypsum mixing and filling device includes a chassis, a vacuum barrel fixed inside the chassis, and a vacuum suction device for evacuating the vacuum barrel. The barrel opening of the vacuum barrel is disposed corresponding to the upper side of the chassis. It further includes a mixing device, a vacuum barrel cover fixed to the bottom of the mixing device, a moving drive mechanism for driving the mixing device and the vacuum barrel cover to move to / away from the barrel opening of the vacuum barrel, and an electric control device. The mixing device, the vacuum suction device, and the moving drive mechanism are respectively electrically connected to the electric control device. The mixing device includes a mixing cylinder body arranged vertically, a mixing barrel cover for covering the barrel opening of the mixing cylinder body, a mixing rotating shaft rotatably installed vertically inside the mixing cylinder body, a mixing structure installed on the mixing rotating shaft, and a mixing drive mechanism for driving the mixing rotating shaft to rotate. A plurality of filling valves penetrating through the vacuum barrel cover are provided at the bottom of the barrel of the mixing cylinder body.

[0022] As an improvement, support columns are fixed on the chassis, and support arms are fixed on the side of the mixing cylinder body. One side of the support arm away from the mixing cylinder body is rotatably installed on the support column. The moving drive mechanism is fixed at the top of the support column and is used for driving the mixing device and the vacuum barrel cover to rotate around the support column. The gypsum mixing and filling device further includes a cleaning basin fixed on the chassis on the side of the support column away from the vacuum barrel, a cleaning spray head fixed to the bottom of the cleaning basin, and a water supply pump communicated with the cleaning spray head. A drain port is provided on the side wall of the cleaning basin at the side of the cleaning spray head.

[0023] As an improvement, a cone is provided inside the mixing cylinder body and is fixed to the bottom of the barrel of the mixing cylinder body. A sealed setting is provided between the bottom of the cone and the bottom of the barrel of the mixing cylinder body. A gap is provided between the edge of the bottom of the cone and the inner side wall of the mixing cylinder body. The cone is provided with an axial through hole. A sleeve is fixed to the upper part of the cone. Bearings are respectively provided between the mixing rotating shaft and the axial through hole of the cone and the side of the sleeve away from the cone. The plurality of filling valves are arranged corresponding to the bottom part of the barrel of the mixing cylinder body between the edge of the bottom of the cone and the inner side wall of the mixing cylinder body and are arranged at intervals along the circumference of the mixing cylinder body.

[0024] As an improvement, the stirring structure includes an upper mounting ring fixed to the stirring rotating shaft, a lower mounting ring sleeved on the outer peripheral side of the sleeve, and at least two connecting vertical plates connected between the upper mounting ring and the lower mounting ring. A first stirring arm is fixed on each of the connecting vertical plates; a second stirring arm attached to the circumferential side surface of the conical body is fixed at the lower end of at least one of the connecting vertical plates. The second stirring arm extends from the upper part of the conical body to the bottom of the conical body. A fixed seat is provided at the end of the second stirring arm corresponding to the bottom of the conical body, and a scraping plate located between the edge of the bottom of the conical body and the inner side wall of the stirring cylinder is fixed on the fixed seat.

[0025] As an improvement, there are four connecting vertical plates, which are evenly distributed along the circumferences of the upper mounting ring and the lower mounting ring. The first stirring arms on the two opposite connecting vertical plates are correspondingly arranged, and the first stirring arms on the two connecting vertical plates of one group of opposite sides and the first stirring arms on the two connecting vertical plates of the other group of opposite sides are arranged at intervals along the axial direction of the stirring rotating shaft; the second stirring arms are respectively fixed at the lower ends of the two connecting vertical plates of one group of opposite sides.

[0026] As an improvement, the stirring device further includes a filtering structure arranged inside the stirring cylinder. A plurality of supporting blocks are provided on the inner side wall of the stirring cylinder at intervals along the circumference of the stirring cylinder, and the filtering structure is supported by the plurality of supporting blocks; the filtering structure includes a filtering cylinder, a filter screen fixed to the lower barrel opening of the filtering cylinder, and handles arranged on the opposite sides of the inner side wall of the filtering cylinder.

[0027] Due to the adoption of the above technical solutions, the beneficial effects obtained are as follows:

[0028] During casting, a plaster mold is made through the cooperation of a wax tree and a plaster slurry container. Since the wax tree is provided with a plurality of jewelry wax models, there are a plurality of product cavities for gold jewelry inside the plaster mold. There are a plurality of gold jewelry on the gold jewelry tree formed by casting through the plaster mold by a casting device, which can improve the casting efficiency. Moreover, when the product is updated, only the jewelry wax models of the new product need to be formed into a new wax tree, and there is no need to design a casting mold, which can reduce the production cost. The gold jewelry casting and forming process of the present invention solves the problems of low production efficiency and high production cost in the existing casting production of gold jewelry. Description of the Drawings

[0029] Figure 1 is an exploded structural schematic diagram of the plaster slurry container of the gold jewelry casting and forming process of the embodiment of the present invention;

[0030] Figure 2Schematic three-dimensional structure diagram showing multiple gypsum slurry containers of the gold jewelry casting and forming process according to an embodiment of the present invention placed on a support base;

[0031] Figure 3 Schematic three-dimensional structure diagram of a gypsum stirring and filling device of the gold jewelry casting and forming process according to an embodiment of the present invention;

[0032] Figure 4 Schematic cross-sectional structure diagram of a gypsum stirring and filling device of the gold jewelry casting and forming process according to an embodiment of the present invention;

[0033] Figure 5 Schematic three-dimensional structure diagram of a stirring structure of a gypsum stirring and filling device of the gold jewelry casting and forming process according to an embodiment of the present invention;

[0034] Figure 6 Schematic three-dimensional structure diagram of a gypsum block crushing device of the gold jewelry casting and forming process according to an embodiment of the present invention;

[0035] Figure 7 Schematic cross-sectional structure diagram of a gypsum block crushing device of the gold jewelry casting and forming process according to an embodiment of the present invention;

[0036] Among them, 11 is a steel cup; 111 is a retaining ring; 12 is a rubber bottom cover; 121 is a mounting seat; 13 is a support base; 131 is a lifting frame; 132 is a high positioning rod; 133 is a low positioning rod; 20 is a chassis; 21 is a vacuum barrel body; 22 is a cleaning basin; 30 is a stirring device; 31 is a stirring cylinder; 311 is a conical body; 312 is a sleeve; 313 is a support block; 32 is a support arm; 33 is a stirring rotating shaft; 34 is a stirring structure; 341 is an upper mounting ring; 342 is a lower mounting ring; 343 is a connecting vertical plate; 344 is a first stirring arm; 345 is a second stirring arm; 346 is a fixing seat; 35 is a stirring drive mechanism; 351 is a carrier plate; 36 is a filling valve; 37 is a stirring barrel cover; 381 is a filtering cylinder; 382 is a filter screen; 383 is a handle; 40 is a rotary cylinder; 41 is a support column; 50 is a vacuum barrel cover; 60 is an electric control device; 70 is a control electrical box; 80 is a gypsum block crushing device; 81 is a crushing support; 82 is a crushing cylinder; 83 is a crushing rotating shaft; 84 is a crushing rod; 85 is a feeding port; 851 is a notch; 86 is a recycling discharge port; 87 is a water inlet; 88 is a residue discharge port; 90 is a vibrator. Detailed implementation manners

[0037] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0038] Figures 1 to 7 is a schematic structural diagram of a gypsum slurry container, a gypsum stirring and filling device, and a gypsum block crushing device for the gold jewelry casting and forming process according to an embodiment of the present invention. Among them, Figure 1 shows a schematic exploded structural diagram of the gypsum slurry container for the gold jewelry casting and forming process according to an embodiment of the present invention, Figure 2 shows a three-dimensional structural diagram of a plurality of gypsum slurry containers for the gold jewelry casting and forming process according to an embodiment of the present invention placed on a support base, Figure 3 shows a three-dimensional structural diagram of the gypsum stirring and filling device for the gold jewelry casting and forming process according to an embodiment of the present invention, Figure 4 shows a sectional structural diagram of the gypsum stirring and filling device for the gold jewelry casting and forming process according to an embodiment of the present invention, Figure 5 shows a three-dimensional structural diagram of the stirring structure of the gypsum stirring and filling device for the gold jewelry casting and forming process according to an embodiment of the present invention, Figure 6 shows a three-dimensional structural diagram of the gypsum block crushing device for the gold jewelry casting and forming process according to an embodiment of the present invention, Figure 7 shows a sectional structural diagram of the gypsum block crushing device for the gold jewelry casting and forming process according to an embodiment of the present invention. For the sake of convenience in description, only the parts related to the present invention are shown in the figure.

[0039] It should be noted that if the directional indications (such as up, down, front, back, etc.) involved in the present invention are only used to explain the relative positional relationship between components in a certain specific posture, if this specific posture changes, then the directional indications will also change accordingly; if the descriptions such as "first", "second", etc. involved in the present invention are used, then the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features.

[0040] An embodiment of the present invention discloses a gold jewelry casting and forming process, including the following steps:

[0041] Step 10. Making a wax tree

[0042] Connect a plurality of jewelry wax models to a wax tree trunk through wax tree branches respectively to form a wax tree;

[0043] Generally, the jewelry wax model is welded to one end of the wax tree branch by an electric welding gun, and then the other end of the wax tree branch is welded to the wax tree trunk; in some other embodiments, the jewelry wax model and the wax tree branch may also be an integral structure, and the wax tree branch is formed simultaneously when manufacturing the jewelry wax model.

[0044] Step 20. Making a gypsum mold

[0045] Install the wax tree inside the gypsum slurry container. Among them, asFigure 1 As shown in Figure 1 , the gypsum slurry container includes a cylindrical steel cup 11. A plurality of through holes are provided on the side wall of the steel cup 11. A retaining ring 111 is provided on the outer peripheral side of the steel cup 11 near the bottom end of the steel cup 11. It also includes a breathable outer cover (not shown in the figure) sleeved between the retaining ring 111 and the upper end of the steel cup 11, and a rubber bottom cover 12 for installing at the bottom end of the steel cup 11. An installation seat 121 is provided on the rubber bottom cover 12. Fix the bottom end of the wax tree rod of the wax tree to the installation seat 121 of the rubber bottom cover 12, and then snap the rubber bottom cover 12 onto the bottom end of the steel cup 11 so that the wax mold is located inside the steel cup 11.

[0046] Place a plurality of gypsum slurry containers with wax trees on the support seat 13, and then transfer the support seat 13 and the plurality of gypsum slurry containers to the gypsum mixing and filling equipment. The gypsum slurry is made by the gypsum mixing and filling equipment, and the gypsum slurry is poured into the plurality of gypsum slurry containers and the wax mold is immersed in the gypsum slurry. Specifically, the support seat 13 and the plurality of gypsum slurry containers are transferred to the gypsum mixing and filling equipment through the lifting frame 131 of the support seat 13 by a lifting device. In order to facilitate the positioning of the gypsum slurry container on the support seat 13, a positioning structure is provided on the support seat 13 corresponding to each gypsum slurry container, including at least three high positioning rods 132 circumferentially arranged corresponding to the retaining ring 111 and at least three low positioning rods 133 circumferentially arranged corresponding to the rubber bottom cover 12, which can simultaneously position the retaining ring 111 of the steel cup 11 and the rubber bottom cover 12.

[0047] After taking out the plurality of gypsum slurry containers filled with gypsum slurry and the support seat 13 from the gypsum mixing and filling equipment, let them solidify. After the gypsum slurry solidifies, remove the rubber bottom cover 12 of the gypsum slurry container to separate the rubber bottom cover 12 from the bottom end of the wax tree rod.

[0048] Then put the gypsum slurry container with the rubber bottom cover 12 removed into a heating furnace for heating. The wax liquid formed after the wax tree melts flows out from the bottom end of the steel cup 11. The gypsum solidified inside the gypsum slurry container forms a gypsum mold. There is a wax tree cavity inside the gypsum mold, and the gate of the wax tree cavity is located at the bottom end of the steel cup 11. Among them, the cavity part corresponding to the wax tree rod forms the main runner, the cavity part corresponding to the wax tree branches forms the branch runners, and the cavity part corresponding to the jewelry wax mold forms the product cavity.

[0049] As Figure 3 、 Figure 4 and Figure 5As shown in the figure, the gypsum mixing and filling equipment includes a chassis 20, a vacuum barrel 21 fixed inside the chassis 20, and a vacuum suction device for evacuating the vacuum barrel 21. The barrel opening of the vacuum barrel 21 is arranged corresponding to the upper side of the chassis 20. It further includes a mixing device 30, a vacuum barrel cover 50 fixed at the bottom of the mixing device 30, a moving drive mechanism for driving the mixing device 30 and the vacuum barrel cover 50 to move to / away from the barrel opening of the vacuum barrel 21, and an electric control device 60. The mixing device 30, the vacuum suction device, and the moving drive mechanism are respectively electrically connected to the electric control device 60. The mixing device 30 includes a mixing cylinder body 31 arranged vertically, a mixing barrel cover 37 for covering the barrel opening of the mixing cylinder body 31, a mixing rotating shaft 33 rotatably installed vertically inside the mixing cylinder body 31, a mixing structure 34 installed on the mixing rotating shaft 33, and a mixing drive mechanism 35 for driving the mixing rotating shaft 33 to rotate. A plurality of filling valves 36 penetrating the vacuum barrel cover 50 are arranged at the bottom of the mixing cylinder body 31. During operation, after the support base 13 and a plurality of gypsum slurry containers placed on the support base 13 are transferred inside the vacuum barrel 21, the moving drive mechanism drives the mixing device 30 and the vacuum barrel cover 50 to move to the barrel opening of the vacuum barrel 21, and the vacuum barrel cover 50 is covered on the barrel opening of the vacuum barrel 21. Then, the mixing device 30 fills the gypsum slurry into a plurality of gypsum slurry containers through a plurality of filling valves 36 respectively. After filling, the vacuum suction device evacuates the vacuum barrel 21 covered with the vacuum barrel cover 50, and the air bubbles inside the gypsum slurry can be sucked out to avoid affecting the product cavity inside the gypsum mold. Usually, the filling valve 36 is a manual valve. Of course, it can also be set as an electromagnetic valve, which is convenient to operate and can accurately control the filling amount of the gypsum slurry.

[0050] Specifically, a support column 41 is fixed on the chassis 20, and a support arm 32 is fixed on the side of the mixing cylinder body 31. The side of the support arm 32 away from the mixing cylinder body 31 is rotatably installed on the support column 41. The moving drive mechanism is fixed at the top of the support column 41 and is used to drive the mixing device 30 and the vacuum barrel cover 50 to rotate around the support column 41. Usually, the moving drive mechanism is a rotary cylinder 40. The piston rod of the rotary cylinder 40 is fixedly connected to the top of the support column 41, and the support arm 32 is fixedly connected to the cylinder body of the rotary cylinder 40. Of course, the moving drive mechanism can also be set as a rotary electric cylinder.

[0051] As Figure 4As shown in the figure, a carrier plate 351 is also fixed to the side of the stirring cylinder body 31. One side of the carrier plate 351 away from the stirring cylinder body 31 is rotatably installed on the support column 41. The stirring drive mechanism 35 is fixedly installed on the carrier plate 351. A transmission mechanism is provided between the output shaft of the stirring drive mechanism 35 and the shaft body part of the stirring rotating shaft 33 outside the stirring cylinder body 31. Generally, the transmission mechanism respectively includes a driving pulley fixed to the output shaft of the stirring drive mechanism 35 and a driven pulley fixed to the shaft body part of the stirring rotating shaft 33 outside the stirring cylinder body 31. A conveyor belt is provided between the driving pulley and the driven pulley.

[0052] In order to facilitate the rotational installation of the stirring rotating shaft 33 on the stirring cylinder body 31, a conical body 311 fixed to the bottom of the stirring cylinder body 31 is provided inside the stirring cylinder body 31. A sealing is provided between the bottom of the conical body 311 and the bottom of the stirring cylinder body 31. Specifically, it is achieved by setting a gasket or applying sealant between the edge part of the bottom of the conical body 311 and the bottom of the stirring cylinder body 31. A spacing is provided between the edge part of the bottom of the conical body 311 and the inner side wall of the stirring cylinder body 31. The conical body 311 is provided with an axial through hole. A sleeve 312 is fixed to the upper part of the conical body 311. Bearings are respectively provided between the stirring rotating shaft 33 and the axial through hole of the conical body 311 and the side of the sleeve 312 away from the conical body 311. Correspondingly, a plurality of filling valves 36 are arranged corresponding to the bottom part of the stirring cylinder body 31 between the edge part of the bottom of the conical body 311 and the inner side wall of the stirring cylinder body 31, and are arranged at intervals along the circumferential direction of the stirring cylinder body 31. The inlets of the plurality of filling valves 36 are respectively arranged at the bottom part of the stirring cylinder body 31 between the edge part of the bottom of the conical body 311 and the inner side wall of the stirring cylinder body 31.

[0053] Generally, the axial through hole is set as a stepped hole. The small-diameter part of the stepped hole is arranged close to the bottom of the stirring cylinder body 31, and the large-diameter part of the stepped hole is arranged away from the bottom of the stirring cylinder body 31. The sleeve 312 is inserted into the large-diameter part of the stepped hole. A sealing structure, such as a sealing ring, sealant, etc., is provided between the sleeve 312 and the large-diameter part of the stepped hole.

[0054] As Figure 4 and Figure 5 shown in the figure, the stirring structure 34 includes an upper mounting ring 341 fixed to the stirring rotating shaft 33, a lower mounting ring 342 sleeved on the outer peripheral side of the sleeve 312, and at least two connecting vertical plates 343 connected between the upper mounting ring 341 and the lower mounting ring 342. A first stirring arm 344 is respectively fixed on each connecting vertical plate 343.

[0055] Specifically, four connecting vertical plates 343 are provided and are evenly distributed along the circumferences of the upper mounting ring 341 and the lower mounting ring 342. The first stirring arms 344 on two opposite-side connecting vertical plates 343 are correspondingly arranged, and the first stirring arms 344 on two opposite-side connecting vertical plates 343 of one group are spaced along the axial direction of the stirring rotating shaft 33 from the first stirring arms 344 on two opposite-side connecting vertical plates 343 of the other group, so as to stir at different heights.

[0056] Further, a second stirring arm 345 attached to the circumferential side surface of the conical body 311 is fixed at the lower end of at least one connecting vertical plate 343. The second stirring arm 345 extends from the upper part of the conical body 311 to the bottom of the conical body 311. A fixing seat 346 is provided at the end of the second stirring arm 345 corresponding to the bottom of the conical body 311. A scraping plate (not shown in the figure) located between the edge part of the bottom of the conical body 311 and the inner side wall of the stirring cylinder body 31 is fixed on the fixing seat 346, which is used to scrape the bottom part of the stirring cylinder body 31 between the edge part of the bottom of the conical body 311 and the inner side wall of the stirring cylinder body 31, so as to avoid blocking the inlet of the filling valve 36, and meanwhile can play a role in stirring; specifically, the second stirring arms 345 are respectively fixed at the lower ends of two opposite-side connecting vertical plates 343 of one group.

[0057] As Figure 4 shown, a filtering structure is further provided inside the stirring cylinder body 31 to prevent sundries from entering the inside of the stirring cylinder body 31. For the convenience of installation, a plurality of support blocks 313 are provided on the inner side wall of the stirring cylinder body 31 at intervals along the circumference of the stirring cylinder body 31, and the filtering structure is supported by the plurality of support blocks 313. Specifically, the filtering structure includes a filtering cylinder body 381, a filter screen 382 arranged at the lower barrel opening of the filtering cylinder body 381, and handles 383 arranged at opposite sides of the inner side wall of the filtering cylinder body 381. During installation, the filtering structure is directly placed inside the stirring cylinder body 31 so that the filtering structure is supported by the plurality of support blocks 313. The gypsum powder and water are directly poured into the cavity surrounded by the filtering cylinder body 381 and the filter screen 382. The gypsum powder and water enter the inside of the stirring cylinder body 31 through the filter screen 382, and the sundries remain in the cavity surrounded by the filtering cylinder body 381 and the filter screen 382.

[0058] After working for a period of time, the stirring device 30 needs to be cleaned to prevent the setting of the gypsum slurry from affecting stirring and clogging the filling valve 36. The gypsum stirring and filling equipment further includes a cleaning basin 22 disposed on the chassis 20, a cleaning nozzle fixed to the bottom of the cleaning basin 22, and a water supply pump communicated with the cleaning nozzle. A drain port is provided on the side wall of the cleaning basin 22 at the side of the cleaning nozzle; when the moving drive mechanism drives the stirring device 30 and the vacuum barrel cover 50 away from the barrel opening of the vacuum barrel body 21, it can drive the stirring device 30 and the vacuum barrel cover 50 to move to the cleaning basin 22. After working for a period of time, the moving drive mechanism drives the stirring device 30 and the vacuum barrel cover 50 to move to the cleaning basin 22, and the cleaning nozzle sprays water to clean the plurality of filling valves 36 and the vacuum barrel cover 50, and the staff cleans the inside of the stirring cylinder body 31. The residual gypsum washed down flows out through the plurality of filling valves 36 into the cleaning basin 22 and is discharged through the drain port.

[0059] Specifically, the cleaning basin 22 is disposed on one side of the support column 41 away from the vacuum barrel body 21 and is arranged side by side with the vacuum barrel body 21.

[0060] Specifically, the electric control device 60 includes a box body fixed to the chassis 20, a main board fixed inside the box body, a PLC controller disposed on the main board, a power cord connected to the main board, and a switch button disposed on the box body, etc. The structure of the electric control device 60 is a well-known technology, and its structure and function can be reasonably designed by technicians in the field according to the structure and operation process of the gypsum stirring and filling equipment, and will not be elaborated here.

[0061] In order to enhance the forming effect of the gypsum mold, a vibrator 90 electrically connected to the electric control device 60 is fixed to the bottom of the vacuum barrel body 21. After pouring the gypsum slurry into the plurality of gypsum slurry containers, the vibrator 90 is started, and the gypsum slurry inside the gypsum slurry container can be made more solid through vibration, avoiding the generation of air cavities inside the gypsum slurry.

[0062] For the convenience of operation, a control electric box 70 electrically connected to the electric control device 60 is fixed to the cylinder body of the rotary cylinder 40, and can control the stirring device 30, the vacuum suction device, the moving drive, the vibrator 90, and the cleaning nozzle.

[0063] In some other embodiments, the moving drive mechanism can also be set to the following structure, including a moving bracket, a translation drive mechanism fixed to the moving bracket, and a lifting drive mechanism fixed to the output part of the translation drive mechanism. The stirring cylinder body 31 is fixed to the output part of the lifting drive mechanism. Generally, the translation drive mechanism and the lifting drive mechanism are electric cylinders.

[0064] Step 30. Gold casting

[0065] After taking out the gypsum slurry container and the gypsum mold inside it from the heating furnace, turn them over so that the gate is on top, and transfer the gypsum slurry container and the gypsum mold inside it in a high-temperature state to the casting equipment. The casting equipment casts liquid gold into the wax tree cavity through the gate, and take it out after the liquid gold solidifies and forms a shape.

[0066] Then put the gypsum slurry container with the rubber bottom cover 12 removed into the heating furnace for heating. The wax liquid formed after the wax tree melts flows out from the bottom end of the steel cup 11. The solidified gypsum inside the gypsum slurry container forms a gypsum mold, and there is a wax tree cavity inside the gypsum mold. The gate of the wax tree cavity is located at the bottom end of the steel cup 11; among them, the cavity part corresponding to the wax tree rod forms the main runner, the cavity part corresponding to the wax tree branches forms the branch runners, and the cavity part corresponding to the jewelry wax mold forms the product cavity.

[0067] Step 40. Water-cooled explosion of the gypsum mold

[0068] Put the gypsum slurry container taken out from the casting equipment into water to explode the gypsum mold inside the gypsum slurry container, and take out the gold jewelry tree formed inside the gypsum mold.

[0069] Specifically, after the gypsum mold is water-cooled and exploded, the formed gypsum fragments are input into the gypsum fragment crushing equipment 80 for crushing to form a mixed emulsion, and the mixed emulsion is output to the screening equipment. The commonly used screening equipment is a screening bed for gold recovery.

[0070] Such as Figure 6 and Figure 7 As shown, the gypsum fragment crushing equipment 80 includes a crushing support 81, a crushing cylinder 82 fixed to the crushing support 81 in the horizontal direction. The two ends of the crushing cylinder 82 are closed. An inlet 85 communicating with the inside of the crushing cylinder 82 is provided on the upper side of one end of the crushing cylinder 82. A recovery discharge port 86 communicating with the inside of the crushing cylinder 82 is provided at the other end of the crushing cylinder 82. It also includes a crushing rotating shaft 83 rotatably installed between the two ends of the crushing cylinder 82, a crushing structure installed on the crushing rotating shaft 83, and a crushing driving mechanism for driving the crushing rotating shaft 83 to rotate. Usually, the crushing driving mechanism is a motor, and the crushing rotating shaft 83 is driven to rotate by means of a belt pulley and a belt.

[0071] Specifically, the crushing structure includes multiple groups of crushing teeth arranged at intervals along the axis of the crushing rotating shaft 83. Each group of crushing teeth respectively includes a first crushing rod group and a second crushing rod group arranged at intervals along the axis of the crushing rotating shaft 83. The first crushing rod group and the second crushing rod group respectively include at least two crushing rods 84 arranged at intervals along the circumferential direction of the crushing rotating shaft 83. At least two crushing rods 84 of the first crushing rod group and at least two crushing rods 84 of the second crushing rod group are arranged alternately in sequence along the circumferential direction of the crushing rotating shaft 83, which can increase the crushing effect. Among them, a notch 851 is provided on one side of the feeding port 85, which is convenient for the scraper conveyor to convey gypsum fragments to the feeding port 85.

[0072] After working for a period of time, deposits will be generated inside the crushing cylinder 82, and it is necessary to clean the inside of the crushing cylinder 82. A water inlet 87 is provided at the closed end of the crushing cylinder 82 away from the feeding port 85, and a residue discharge port 88 is provided at the bottom of the crushing cylinder 82 near the feeding port 85. Plugs are respectively provided at the water inlet 87 and the residue discharge port 88. During normal operation, the water inlet 87 and the residue discharge port 88 are in a blocked state. When cleaning is required, the plugs at the water inlet 87 and the residue discharge port 88 are removed, and then the water inlet 87 is connected to a water pipe, and the water pipe is used to flush the inside of the crushing cylinder 82 to achieve cleaning.

[0073] Step 50. Processing and forming gold jewelry

[0074] Clean the gold jewelry tree, then cut off the gold jewelry on the gold jewelry tree, and trim the outer surface of the gold jewelry.

[0075] Specifically, first pickle the gold jewelry tree with acid, and then wash it with water, which can improve the cleaning effect and reduce the residue on the outer side of the gold jewelry tree. Usually, hydrochloric acid is used for pickling.

[0076] The gold jewelry casting and forming process of the embodiment of the present invention further includes:

[0077] Step 60. Air drying

[0078] Air dry the cut-off gold jewelry to avoid liquid residue on the outer surface of the gold jewelry.

[0079] During casting, a gypsum mold is made through the cooperation of the wax tree and the gypsum slurry container. Since the wax tree is provided with multiple jewelry wax molds, there are multiple product cavities for gold jewelry inside the gypsum mold. There are multiple gold jewelry on the gold jewelry tree formed by casting through the gypsum mold by the casting equipment, which can improve the casting efficiency. Moreover, when the product is updated, only the jewelry wax mold of the new product needs to be formed into a new wax tree, and there is no need to design a casting mold, which can reduce the production cost. The gold jewelry casting and forming process of the present invention solves the problems of low production efficiency and high production cost in the existing casting production of gold jewelry.

[0080] The above are only some embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A casting process for gold jewelry, characterized in that, Including the following steps: Step 10. Making a wax tree Connecting multiple jewelry wax models to a wax tree trunk through wax tree branches respectively to form a wax tree; Step 20. Making a gypsum mold Fixing the bottom end of the wax tree trunk of the wax tree to the rubber bottom cover of a gypsum slurry container, and then buckling the rubber bottom cover to the bottom end of the steel cup of the gypsum slurry container, so that the wax tree is located inside the steel cup; Placing multiple gypsum slurry containers with the wax tree installed on a support base, and then transferring the support base and the multiple gypsum slurry containers to a gypsum mixing and filling device. Making gypsum slurry by the gypsum mixing and filling device, pouring the gypsum slurry into the multiple gypsum slurry containers and submerging the wax models into the gypsum slurry; Taking out the multiple gypsum slurry containers filled with gypsum slurry and the support base from the gypsum mixing and filling device and letting them solidify; after the gypsum slurry solidifies, removing the rubber bottom cover to separate the rubber bottom cover from the bottom end of the wax tree trunk; Then putting the gypsum slurry container with the rubber bottom cover removed into a heating furnace for heating. The wax liquid formed after the wax tree melts flows out from the bottom end of the steel cup. The gypsum solidified inside the gypsum slurry container forms a gypsum mold. There is a wax tree cavity inside the gypsum mold, and the gate of the wax tree cavity is located at the bottom end of the steel cup; wherein, the cavity part corresponding to the wax tree trunk forms a main runner, the cavity part corresponding to the wax tree branches forms branch runners, and the cavity part corresponding to the jewelry wax model forms a product cavity; Step 30. Gold casting Taking out the gypsum slurry container and the gypsum mold inside it from the heating furnace and turning them over so that the gate is located above, and transferring the gypsum slurry container and the gypsum mold inside it in a high-temperature state to a casting device. Casting liquid gold into the wax tree cavity through the gate by the casting device, and taking it out after the liquid gold solidifies and forms a shape; Step 40. Water-cooling and cracking the gypsum mold Putting the gypsum slurry container taken out from the casting device into water to crack the gypsum mold inside the gypsum slurry container, and taking out the gold jewelry tree formed inside the gypsum mold; Step 50. Processing and forming gold jewelry Cleaning the gold jewelry tree, and then cutting off the gold jewelry on the gold jewelry tree.

2. The gold jewelry casting process according to claim 1, characterized in that, In Step 40, after water-cooling and cracking the gypsum mold, inputting the gypsum fragments formed by cracking into a gypsum fragment crushing device to be crushed into a mixed emulsion, and outputting the mixed emulsion to a screening device for gold recovery.

3. The gold jewelry casting and forming process according to claim 1, characterized in that, In Step 50, pickling the gold jewelry tree first and then washing it with water.

4. The gold jewelry casting and forming process according to claim 1, wherein The gold jewelry casting and forming process further includes: Step 60. Air-drying the cut-off gold jewelry.

5. The gold jewelry casting and forming process according to any one of claims 1 to 4, characterized in that, The gypsum stirring and filling equipment includes a chassis, a vacuum barrel fixed inside the chassis, and a vacuum suction device for evacuating the vacuum barrel. The barrel opening of the vacuum barrel is arranged corresponding to the upper side of the chassis. It further includes a stirring device, a vacuum barrel cover fixed at the bottom of the stirring device, a moving drive mechanism for driving the stirring device and the vacuum barrel cover to move to / away from the barrel opening of the vacuum barrel, and an electric control device. The stirring device, the vacuum suction device, and the moving drive mechanism are respectively electrically connected to the electric control device. The stirring device includes a stirring cylinder body arranged vertically, a stirring barrel cover for covering the barrel opening of the stirring cylinder body, a stirring rotating shaft rotatably installed vertically inside the stirring cylinder body, a stirring structure installed on the stirring rotating shaft, and a stirring drive mechanism for driving the stirring rotating shaft to rotate. A plurality of filling valves are provided at the bottom of the stirring cylinder body and penetrate through the vacuum barrel cover.

6. The gold jewelry casting process according to claim 5, characterized in that, Support columns are fixed on the chassis, and a support arm is fixed on the side of the stirring cylinder body. The side of the support arm away from the stirring cylinder body is rotatably installed on the support column. The moving drive mechanism is fixed at the top of the support column and is used for driving the stirring device and the vacuum barrel cover to rotate around the support column. The gypsum stirring and filling equipment further includes a cleaning basin fixed on the chassis on the side of the support column away from the vacuum barrel, a cleaning spray head fixed at the bottom of the cleaning basin, and a water supply pump communicated with the cleaning spray head. A drain port is provided on the side wall of the cleaning basin at the side of the cleaning spray head.

7. The gold jewelry casting and molding process according to claim 5, characterized in that A cone is provided inside the stirring cylinder body and is fixed at the bottom of the stirring cylinder body. A seal is provided between the bottom of the cone and the bottom of the stirring cylinder body. A gap is provided between the edge of the bottom of the cone and the inner side wall of the stirring cylinder body. The cone is provided with an axial through hole. A sleeve is fixed on the upper part of the cone. Bearings are respectively provided between the stirring rotating shaft and the axial through hole of the cone and the side of the sleeve away from the cone. A plurality of the filling valves are arranged corresponding to the bottom part of the stirring cylinder body between the edge of the bottom of the cone and the inner side wall of the stirring cylinder body and are arranged at intervals along the circumference of the stirring cylinder body.

8. The gold jewelry casting process according to claim 7, characterized in that, The stirring structure includes an upper mounting ring fixed on the stirring rotating shaft, a lower mounting ring sleeved on the outer peripheral side of the sleeve, and at least two connecting vertical plates connected between the upper mounting ring and the lower mounting ring. A first stirring arm is fixed on each connecting vertical plate. A second stirring arm attached to the circumferential side surface of the cone is fixed at the lower end of at least one connecting vertical plate. The second stirring arm extends from the upper part of the cone to the bottom of the cone. A fixing seat is provided at the end of the second stirring arm corresponding to the bottom of the cone, and a scraping plate located between the edge of the bottom of the cone and the inner side wall of the stirring cylinder body is fixed on the fixing seat.

9. The gold jewelry casting and forming process according to claim 8, characterized in that, Four connecting vertical plates are provided, which are evenly distributed along the circumferences of the upper mounting ring and the lower mounting ring. The first stirring arms on the two connecting vertical plates on the opposite sides are correspondingly arranged, and the first stirring arms on the two connecting vertical plates on one set of opposite sides and the first stirring arms on the two connecting vertical plates on the other set of opposite sides are arranged at intervals along the axial direction of the stirring rotating shaft; the second stirring arms are respectively fixed at the lower ends of the two connecting vertical plates on one set of opposite sides.

10. The casting process for gold jewelry according to claim 5, characterized in that, The stirring device further includes a filtering structure arranged inside the stirring cylinder body. A plurality of supporting blocks are arranged at intervals along the circumference of the inner side wall of the stirring cylinder body, and the filtering structure is supported by the plurality of supporting blocks; the filtering structure includes a filtering cylinder body, a filter screen fixed to the lower barrel opening of the filtering cylinder body, and handles arranged at opposite sides of the inner side wall of the filtering cylinder body.

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