A 3D printing sand mold and molding method for a supercharger four-port exhaust pipe
Through 3D printing technology, the sand shape and modeling method of the four-port exhaust pipe of the supercharger has been designed, which has solved the problem of poor production speed and achieved efficient production and low-cost development.
Patent Information
- Application Number
- CN202210938947.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-08-05
- Publication Date
- 2025-08-12
- Estimated Expiration
- 2042-08-05
AI Technical Summary
The prior art has poor speed in the production of four-port exhaust pipes of supercharger, resulting in low production efficiency.
The lower box sand type, upper box sand type, hanging lug and cold iron sand core are designed using 3D printing technology, combined with furan resin and ceramic sand, and the integrated design and rapid boxing of scattered components are achieved through 3D printing of sand type and modeling methods.
It improves the production speed and efficiency of the four-port exhaust pipe of the supercharger, shortens the development cycle of new products, and reduces R&D costs.
Smart Images
Figure CN115283615B_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of sand casting, and in particular to a 3D printing sand mold and a molding method for a four-port exhaust pipe of a supercharger. Background Art
[0002] At present, manual shaping is adopted in the production of supercharger four-port exhaust pipes. Because the four-port exhaust pipes are special-shaped parts, it is difficult to position the core, and the surface quality is poor, the dimensional error is large, and there are many seams. Polishing the production blanks is time-consuming and labor-intensive.
[0003] The traditional method of preparing sand molds is to make a wooden mold or a metal mold, pour the raw materials into the wooden mold or the metal mold, and wait for the raw materials to self-harden and form to obtain the corresponding sand mold.
[0004] However, in the process of producing supercharger four-port exhaust pipes using traditional methods using wooden or metal molds, each model and specification of the product corresponds to a set of dedicated molds. The mold structure needs to take into account issues such as draft angle, live blocks, blanking, blanking, processing, assembly, polishing and long cycle, resulting in poor production efficiency of supercharger four-port exhaust pipes, thereby affecting the production efficiency of supercharger four-port exhaust pipes. Summary of the Invention
[0005] The purpose of the present invention is to provide a 3D printing sand mold and molding method for a supercharger four-port exhaust pipe, aiming to solve the problem that the existing technology for producing supercharger four-port exhaust pipes is not fast enough, thereby affecting the production efficiency of supercharger four-port exhaust pipes.
[0006] To achieve the above objectives, in a first aspect, the present invention provides a 3D printed sand mold for a four-port exhaust pipe of a supercharger, wherein the 3D printed sand mold comprises a lower box sand mold, an upper box sand mold, two lower box sand mold lifting ears, and two upper box sand mold lifting ears;
[0007] The upper box sand mold is arranged on the top of the lower box sand mold, the two lower box sand mold lifting ears are respectively arranged on both sides of the lower box sand mold, the two upper box sand mold lifting ears are respectively arranged on both sides of the upper box sand mold, the upper box sand mold has a large square convex stop and a small square convex stop, the lower box sand mold has a large square concave stop and a small square concave stop, the upper box sand mold has ten ingates, a horizontal runner, a straight runner, two edge pressure risers and eight top risers, the straight runner and the ten ingates are respectively connected to the horizontal runner.
[0008] Among them, the 3D printing sand mold also includes a cold iron sand core, which is arranged on the side of the lower box sand mold away from the upper box sand mold. The cold iron sand core has a cold iron groove, and the cold iron groove is located at the top of the cold iron sand core.
[0009] Wherein, the lower box sand mold has an outer right exhaust pipe cavity, an outer left exhaust pipe cavity, an inner right exhaust pipe cavity and an inner left exhaust pipe cavity.
[0010] The upper box sand mold also has an outer right exhaust pipe cavity, an outer left exhaust pipe cavity, an inner right exhaust pipe cavity and an inner left exhaust pipe cavity.
[0011] In a second aspect, the present invention further provides a 3D printing sand mold molding method for a supercharger four-port exhaust pipe, comprising the following steps:
[0012] Designing a three-dimensional model according to the drawings of the four-port exhaust pipe of the supercharger, and determining printing conditions based on the three-dimensional model;
[0013] Based on the printing conditions, ceramsite sand is added to the sand mixing tank, and 3D printing furan resin is added to the liquid material tank;
[0014] Set the furan resin addition amount, curing agent addition amount and printing layer thickness in the control panel;
[0015] Add the curing agent into the sand mixing tank and mix evenly. Use the sand spreader to spread a layer of sand from left to right on the molding area. Then the print head sprays the resin onto the sand surface according to the instructions.
[0016] The lifting mechanism descends, and the sand spreader spreads another layer of sand from right to left on the molding area. Then, the print head sprays resin ink on the sand surface according to the instruction, and the layers are stacked until the number of stacking times reaches a preset value.
[0017] The printing box is lifted out and placed in the storage area to remain still. After the sand mold is completely solidified, the printing box is lifted to the cleaning area for cleaning, and the sand mold is lifted out to complete the molding.
[0018] The present invention relates to a 3D printing sand mold and molding method for a supercharger four-port exhaust pipe. The design of the lower box sand mold lifting ear is convenient for lifting the lower box sand mold, and the design of the upper box sand mold lifting ear is convenient for lifting the upper box sand mold. During the production process, it is divided into two boxes of molding, the lower box sand mold and the upper box sand mold. The large square convex stop and the small square convex stop of the upper box sand mold cooperate with the large square concave stop and the small square concave stop of the lower box sand mold to form a gap positioning. The upper box sand mold is provided with ten said inner gates, and the ten said inner gates are evenly distributed and connected with the said conforming cross runner. The straight runner passes through the upper box sand mold and is connected with the cross runner. The upper The box sand mold is provided with eight top risers along the exhaust port, and the blue hot node is compensated for shrinkage. The upper box sand mold is provided with two edge pressure risers along the air inlet. The lower box sand mold and the upper box sand mold are both 3D printed sand molds, and the box assembly is convenient and fast. The original assembled scattered parts are integrated into an integrated design to improve the product functional demands and the performance of the casting, shorten the new product development cycle, and have low R&D costs. It realizes the improvement of the speed of production of the supercharger four-port exhaust pipe, thereby improving the production efficiency of the supercharger four-port exhaust pipe, and solves the problem that the prior art of producing the supercharger four-port exhaust pipe is not fast enough, thereby affecting the production efficiency of the supercharger four-port exhaust pipe. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0020] Figure 1 It is a schematic structural diagram of the 3D printed sand mold of the supercharger four-port exhaust pipe of the present invention.
[0021] Figure 2 It is a schematic diagram of the auxiliary structure of the 3D printing sand mold of the supercharger four-port exhaust pipe of the present invention.
[0022] Figure 3 3D printing sand mold of the supercharger four-port exhaust pipe of the present invention is a bottom-up schematic diagram of the upper box sand mold.
[0023] Figure 4 3D printing sand mold of the supercharger four-port exhaust pipe of the present invention is a schematic top view of the lower box sand mold.
[0024] Figure 5 The present invention is a flowchart of the steps of the 3D printing sand mold molding method for the supercharger four-port exhaust pipe.
[0025] Figure 6It is a structural schematic diagram of tools used in the molding method of the 3D printing sand mold of the supercharger four-port exhaust pipe of the present invention.
[0026] 1- lower box sand mold, 2- chilled iron sand core, 3- chilled iron trough, 4- outer right exhaust pipe cavity, 5- outer right exhaust pipe sand core, 6- outer left exhaust pipe sand core, 7- chilled iron sand core, 8- outer left exhaust pipe cavity, 9- horizontal runner, 10- large square convex stopper, 11- upper box sand mold, 12- pressure edge riser, 13- top riser, 14- small square convex stopper, 15- lower box sand mold lifting ear, 16- upper box sand Lifting ear, 17-inner right exhaust pipe cavity, 18-inner left exhaust pipe cavity, 19-inner left exhaust pipe sand core, 20-large square concave stop, 21-inner right exhaust pipe sand core, 22-sprue, 23-ingate, 24-sand mixing tank, 25-liquid material box, 26-sand spreader, 27-lifting mechanism, 28-print head, 29-molding area, 30-print box, 31-small square concave stop. DETAILED DESCRIPTION
[0027] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention.
[0028] See also Figures 1 to 4 The present invention provides a 3D printing sand mold and molding method for a four-port exhaust pipe of a supercharger, wherein the 3D printing sand mold includes a lower box sand mold 1, an upper box sand mold 11, two lower box sand mold lifting ears 15 and two upper box sand mold lifting ears 16;
[0029] The upper box sand mold 11 is arranged on the top of the lower box sand mold 1, the two lower box sand mold lifting ears 15 are respectively arranged on both sides of the lower box sand mold 1, and the two upper box sand mold lifting ears 16 are respectively arranged on both sides of the upper box sand mold 11. The upper box sand mold 11 has a large square convex stop 10 and a small square convex stop 14, and the lower box sand mold 1 has a large square concave stop 20 and a small square concave stop 31. The upper box sand mold 11 has ten ingates 23, a horizontal runner 9, a straight runner 22, two edge pressure risers 12 and eight top risers 13. The straight runner 22 and the ten ingates 23 are respectively connected to the horizontal runner 9.
[0030] In this embodiment, the design of the lower sand mold lifting ear 15 is convenient for lifting the lower sand mold 1, and the design of the upper sand mold lifting ear 16 is convenient for lifting the upper sand mold 11. During the production process, it is divided into two box moldings, the lower sand mold 1 and the upper sand mold 11. The large square convex stop 10 and the small square convex stop 14 of the upper sand mold 11 cooperate with the large square concave stop 20 and the small square concave stop 31 of the lower sand mold 1 to form a gap positioning. The upper sand mold 11 is provided with ten inner gates 23, which are evenly distributed and connected to the conformal runner 9. The straight runner 2 2 passes through the upper sand mold 11 and is connected to the runner 9. The upper sand mold 11 is provided with eight top risers 13 along the exhaust port and is used to feed the blue heat node. The upper sand mold 11 is provided with two side pressure risers 12 along the air inlet. The lower sand mold 1 and the upper sand mold 11 are both 3D printed sand molds, which are convenient and fast to be assembled. The original scattered parts that were assembled are integrated into an integrated design to improve the product functional appeal and the performance of the casting, shorten the new product development cycle, and have low R&D costs, thereby improving the efficiency of the production of the four-port exhaust pipe of the supercharger, thereby improving the production efficiency of the four-port exhaust pipe of the supercharger.
[0031] Furthermore, the 3D printed sand mold also includes a cold iron sand core 72, which is arranged on the side of the lower box sand mold 1 away from the upper box sand mold 11, and the cold iron sand core 72 has a cold iron groove 3, and the cold iron groove 3 is located at the top of the cold iron sand core 72; the lower box sand mold 1 has an outer right exhaust pipe cavity 4, an outer left exhaust pipe cavity 8, an inner right exhaust pipe cavity 17 and an inner left exhaust pipe cavity 18; the upper box sand mold 11 also has an outer right exhaust pipe cavity 4, an outer left exhaust pipe cavity 8, an inner right exhaust pipe cavity 17 and an inner left exhaust pipe cavity 18.
[0032] In this embodiment, the lower box cold iron groove 3 is used to place cold iron to enhance the local cooling rate of the casting. The outer right exhaust pipe cavity 4 and the outer left exhaust pipe cavity 8 of the lower box sand mold 1 have an outer right exhaust pipe sand core 5 and an outer left exhaust pipe sand core 6, and are connected with the outer mold sand mold to form a whole. The inner right exhaust pipe cavity 17 and the inner left exhaust pipe cavity 18 of the upper box sand mold 11 have an inner right exhaust pipe sand core 21 and an inner left exhaust pipe sand core 19, and are connected with the outer mold sand mold to form a whole.
[0033] See also Figures 5 and 6 In a second aspect, the present invention further provides a 3D printing sand mold molding method for a supercharger four-port exhaust pipe, comprising the following steps:
[0034] S1 designs a three-dimensional model according to a drawing of a four-port exhaust pipe of a supercharger, and determines printing conditions based on the three-dimensional model;
[0035] Specifically, the three-dimensional model is designed according to the drawing of the supercharger four-port exhaust pipe casting, which includes the lower box sand mold 1, the upper box sand mold 11 and the cold iron sand core 2. The three-dimensional model format is converted into STL3D printing format, and the printer conditions are determined according to the size of the three-dimensional model.
[0036] S2 adds ceramsite sand to the sand mixing tank and adds 3D printing furan resin to the liquid material tank based on the printing conditions;
[0037] Specifically, 70 / 140 mesh ceramsite sand is added to the sand mixing tank 24, and 3D printing furan resin is added to the liquid material tank 25.
[0038] S3 sets the furan resin addition amount, curing agent addition amount and printing layer thickness in the control panel;
[0039] Specifically, the furan resin addition amount is set to 1.6%, the curing agent addition amount is set to 0.7%, and the printing layer thickness is set to 0.3 mm.
[0040] S4 adds the curing agent into the sand mixing tank and mixes it evenly. Then, a layer of sand is spread from left to right on the molding area using a sand spreader. Then, the print head sprays the resin onto the sand surface according to the instructions.
[0041] Specifically, a curing agent is added to the sand mixing tank 24 and stirred evenly, a layer of sand is spread from left to right on the molding area 29 by the sand spreader 26, and then the print head 28 sprays the resin onto the sand surface according to instructions.
[0042] S5: The lifting mechanism descends, and the sand spreader spreads another layer of sand from right to left on the molding area. Then, the print head sprays resin ink on the sand surface according to the instruction, and the stacking is continued until the number of stacking reaches a preset value.
[0043] Specifically, the lifting mechanism 27 is lowered by 0.3 mm, and the sand spreader 26 spreads another layer of sand from right to left in the molding area 29. Then, the print head 28 sprays resin ink on the sand surface according to the instruction, and this is superimposed multiple times until the instruction ends.
[0044] S6: The printing box is lifted out and placed in a storage area to rest. After the sand mold is completely solidified, the printing box is lifted to a cleaning area for cleaning, and the sand mold is lifted out to complete the molding.
[0045] Specifically, the printing box 30 is lifted out and placed in the storage area to rest for 60 minutes. After the sand mold is completely solidified, the printing box 30 is lifted to the cleaning area and the sand mold is lifted out. After cleaning the unsolidified sand, the molding is completed.
[0046] The above disclosure is only a preferred embodiment of the patent name of the present invention, and it is certainly not used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment are implemented, and equivalent changes made according to the claims of the present invention are still within the scope of the invention.
Claims
1. A 3D printed sand mold for a supercharger four-port exhaust pipe, characterized in that: The 3D printing sand mold includes a lower sand mold, an upper sand mold, two lower sand mold lifting ears and two upper sand mold lifting ears; The upper box sand mold is arranged on the top of the lower box sand mold, and the two lower box sand mold lifting ears are respectively arranged on both sides of the lower box sand mold, and the two upper box sand mold lifting ears are respectively arranged on both sides of the upper box sand mold, the upper box sand mold has a large square convex stop and a small square convex stop, and the lower box sand mold has a large square concave stop and a small square concave stop, the upper box sand mold has ten ingates, a cross runner, a straight runner, two pressure edge risers and eight top risers, and the straight runner and the ten ingates are respectively connected to the cross runner; the 3D printing sand mold also includes a cold iron sand core, which is arranged on the side of the lower box sand mold away from the upper box sand mold, and the cold iron sand core has a cold iron groove, and the cold iron groove is located at the top of the cold iron sand core; the lower box sand mold has an outer right exhaust pipe type cavity, outer left exhaust pipe cavity, inner right exhaust pipe cavity and inner left exhaust pipe cavity; the upper box sand mold also has an outer right exhaust pipe cavity, an outer left exhaust pipe cavity, an inner right exhaust pipe cavity and an inner left exhaust pipe cavity, the large square convex stop and the small square convex stop of the upper box sand mold cooperate with the large square concave stop and the small square concave stop of the lower box sand mold to form a gap positioning, the outer right exhaust pipe cavity and the outer left exhaust pipe cavity of the lower box sand mold have an outer right exhaust pipe sand core and an outer left exhaust pipe sand core, and are connected with the outer mold sand mold to form a whole, the inner right exhaust pipe cavity and the inner left exhaust pipe cavity of the upper box sand mold have an inner right exhaust pipe sand core and an inner left exhaust pipe sand core, and are connected with the outer mold sand mold to form a whole.
2. A method for forming a 3D printed sand mold of a supercharger four-port exhaust pipe according to claim 1, characterized in that: The following steps are involved: Designing a three-dimensional model according to the drawings of the four-port exhaust pipe of the supercharger, and determining printing conditions based on the three-dimensional model; Based on the printing conditions, ceramsite sand is added to the sand mixing tank, and 3D printing furan resin is added to the liquid material tank; Set the furan resin addition amount, curing agent addition amount and printing layer thickness in the control panel; Add the curing agent into the sand mixing tank and mix evenly. Use the sand spreader to spread a layer of sand from left to right on the molding area. Then the print head sprays the resin onto the sand surface according to the instructions. The lifting mechanism descends, and the sand spreader spreads another layer of sand from right to left on the molding area. Then, the print head sprays resin ink on the sand surface according to the instruction, and the layers are stacked until the number of stacking times reaches a preset value. The printing box is lifted out and placed in the storage area to remain still. After the sand mold is completely solidified, the printing box is lifted to the cleaning area for cleaning, and the sand mold is lifted out to complete the molding.
Citation Information
Patent Citations
Automobile engine exhaust manifold parting and parting scheme thereof
CN108296451A
3D printing sand mold of supercharger bearing shell and modeling method
CN114749625A