Adhesive spraying and processing manufacturing apparatus based on selective powder application mode

Abstract

This invention discloses an adhesive spraying and addition processing apparatus based on a selective powder application mode. [Solution] The apparatus includes a case, an adhesive spraying device, a powder laying device, and a lifting platform, the adhesive spraying device includes a plurality of adhesive storage chambers, corresponding adhesive nozzles and a near-infrared lamp, the powder laying device includes a supply port, a powder laying roller positioned below the supply port, blades positioned on both sides of the powder laying roller, a powder adsorption device provided inside the powder laying roller and a powder discharge device. The selective powder laying adhesive spraying processing manufacturing apparatus of the present invention can accurately lay two different powder materials in the same layer and can adhere two or more powder materials.

Description

Technical Field

[0001] The present invention belongs to the field of additive manufacturing technology, and relates to an adhesive jetting additive manufacturing apparatus based on a selective powder laying mode.

Background Art

[0002] Currently, adhesive jetting additive manufacturing is an additive manufacturing technology for manufacturing three-dimensional objects using adhesives and powdery materials. The advantages of this technology are that it can manufacture objects of large sizes, is compatible with various materials, has a high material utilization rate, a high forming efficiency, and is suitable for realizing rapid forming design, production of complex parts, and customization of products. In particular, when used for metal printing, it can avoid technical problems such as low laser absorption rate of powders and inability to melt or generation of stress warping during the high-temperature cooling process in the process of laser-printing metal materials. However, its disadvantage is that in conventional adhesive jetting additive manufacturing, it is often only possible to perform single-layer printing for one type of material, and some printed parts that require distribution of spatially heterogeneous materials cannot complete manufacturing.

Summary of the Invention

Problems to be Solved by the Invention

[0003] In view of the above problems, an object of the present invention is to propose an adhesive jetting additive manufacturing apparatus based on a selective powder laying mode in order to solve the problem that parts of spatially heterogeneous materials cannot be printed in conventional adhesive jetting additive manufacturing.

Means for Solving the Problems

[0004] The technical solution of the present invention is as follows. An adhesive jetting additive manufacturing apparatus based on a selective powder laying mode according to the present invention, including a case, a powder inlet is provided above the case, An adhesive spraying device is installed inside the case, and the adhesive spraying device includes a plurality of adhesive storage chambers, each of which has a guide rod connected to its lower end, and each of which has an adhesive nozzle attached to its lower end.

[0005] Furthermore, the adhesive spraying device is fixed and moved by four guide rails connected to the inner wall of the case, and the four guide rails include two guide rails at the top and two guide rails on both sides. The two guide rails at its upper end are clean, belt-type motorized sliders that control the movement of the adhesive spraying device. The two guide rails on either side are ball slide rails that secure the adhesive spraying device.

[0006] Furthermore, the adhesive nozzles are arranged in three rows, and a small heating coil is attached above each adhesive nozzle.

[0007] Furthermore, a plurality of near-infrared lamps are attached behind the adhesive nozzle, and each near-infrared lamp consists of two rows of near-infrared lamp beads.

[0008] Furthermore, the powder inlet includes powder supply hopper a and powder supply hopper b. The upper opening of the powder supply hopper a is a rectangle that contracts downwards to become smaller. The aforementioned powder supply hopper b has the same shape as the powder supply hopper a.

[0009] Furthermore, a powder laying tank is installed inside the case, below the powder supply hopper a and powder supply hopper b, and two guide rails are installed below the powder laying tank for fixing and moving the powder laying tank, and the guide rails are clean belt-type electric sliders.

[0010] Furthermore, the powder spreading tank includes a powder spreading device a and a powder spreading device b, and two supply ports corresponding to the powder spreading device a and the powder spreading device b are opened inside and above the powder spreading device a and the powder spreading device b, and discharge ports are opened at the opposite ends of the supply ports. A powder spreading roller is attached to each of the two aforementioned discharge ports, blades are attached to both sides of the powder spreading roller, and a powder adsorption device and a powder discharge device are installed symmetrically inside the powder spreading roller, one above the other.

[0011] Furthermore, pores are distributed across the entire surface of the powder-laying roller. The diameter of the aforementioned pore is <1 μm.

[0012] Furthermore, a nozzle head with the same diameter as the holes drilled on the surface of the powder dispensing roller is positioned on the lower surface of the powder dispensing device. The valves of the powder spreading roller and the nozzle head of the powder discharge device are wirelessly connected to the monitoring system.

[0013] Furthermore, a printing platform is installed in the middle of the lower interior of the case. This printing platform is a vertically movable platform, which is driven up and down by a single filament rod, and four guide rods are attached around its circumference to ensure the vertical stability of the platform. [Effects of the Invention]

[0014] Beneficial Effects of the Invention: The selective powder laying adhesive spraying processing apparatus of the present invention can accurately lay two different powder materials in the same layer and adhere two or more powder materials, which is of significant benefit to the machinery and materials industries. [Brief explanation of the drawing]

[0015] [Figure 1] This is a schematic diagram of the overall structure of the present invention. [Figure 2]It is a half-sectional view of the front view of FIG. 1. [Figure 3] It is a half-sectional view of the left side view of FIG. 1. [Figure 4] It is a schematic diagram of the internal structure of the powder laying device in the present invention. [Figure 5] It is a schematic diagram of the internal structure of the adhesive injection device in the present invention. [Figure 6] It is a schematic diagram of a clean belt-type electric slider in the present invention. [Figure 7] It is a schematic diagram of powder supply during the operation of the present invention. [Figure 8] It is a schematic diagram of powder laying during the operation of the present invention. [Figure 9] It is a schematic diagram of adhesive injection during the operation of the present invention.

Embodiments for Carrying Out the Invention

[0016] Hereinafter, the specific technical solutions of the present invention will be described in more detail using specific examples.

[0017] As shown in FIGS. 1 to 6, the adhesive injection additive manufacturing device based on the selective powder laying mode described in the present invention mainly includes a case 1. A powder inlet 2 is attached above (the upper right side of) the case 1. Powder enters the device from the powder inlet 2 through a material supply device (not shown). The powder inlet 2 includes a powder supply hopper a6 and a powder supply hopper b7. The adhesive injection device 3 includes a plurality of adhesive storage chambers 15, an adhesive nozzle 16 corresponding to each adhesive storage chamber 15, and a near-infrared lamp 17 provided behind the adhesive nozzle 16. Below the powder supply hopper a6 and the powder supply hopper b7, corresponding powder laying tanks 4 are installed. The powder laying tanks 4 are divided into a powder laying device a8 and a powder laying device b9. At the top ends of the powder laying device a8 and the powder laying device b9, supply ports 10 are opened. At the opposite ends of the supply ports 10, discharge ports are opened. Below the discharge ports, powder laying rollers 13 are arranged. On both sides of the powder laying rollers 13, blades 11 are arranged. Inside the powder laying rollers 13, a powder adsorption device 12 and a powder discharge device 14 are provided.

[0018] The upper opening of the powder supply hopper a6 is a quadrilateral that contracts downward to become smaller.

[0019] The powder supply hopper b7 has the same shape as the powder supply hopper a6.

[0020] The width of the adhesive injection device 3 is smaller than the distance between the powder laying tank 4 and the case 1 so that the powder laying tank 4 can move freely. Above the adhesive injection device 3, a plurality of adhesive storage chambers 15 are arranged. The adhesive storage chambers 15 are placed in parallel above the adhesive injection device 3. Below each adhesive storage chamber 15, one guide rod is connected.

[0021] Below the adhesive storage chamber 15, an adhesive nozzle 16 is connected via a guide rod. The adhesive nozzle 16 is connected to the guide rod. The adhesive nozzle 16 has three rows. Above each adhesive nozzle 16, a small heating coil for ejecting the adhesive is provided.

[0022] Behind the adhesive nozzle 16, a near-infrared lamp 17 consisting of two rows of near-infrared lamp beads is provided to rapidly cure the adhesive injection site.

[0023] The adhesive spraying device 3 (intermediate position) is fixed to move stably back and forth by four guide rails. The height of the guide rails is higher than the height of the powder laying tank 4. The two upper rails are clean belt-type electric sliders that control the movement of the spraying device 3. Their closed design effectively blocks the entry of dust and ensures stable operation of the machine. The two rails on both sides are ball slide rails, which also ensure stable operation.

[0024] The powder laying tank 4 is located below the powder supply hopper b7 and the powder supply hopper a6, connected by two guide rails, fixed and movable by the two guide rails, and fixed to the guide rails via connecting members so as to be stably movable from side to side.

[0025] The aforementioned guide rail is a clean, belt-type electric slider.

[0026] The powder laying tank 4 is located below the powder supply hopper, and the height of the powder laying tank 4 is lower than the height of the guide rail of the fixing adhesive spraying device 3. The upper interior of the powder laying tank 4 has two supply ports 10 corresponding to the powder supply hopper b7 and the powder supply hopper a6. The supply ports 10 are designed to narrow downwards in order to ensure that the powder enters the corresponding supply port 10 accurately when supplied.

[0027] A powder-laying roller 13 is placed at the discharge port below the supply port 10. Fine pores are distributed across the entire surface of the powder-laying roller 13, and the diameter of the pores is smaller than 1 μm (the maximum diameter of the pores is smaller than the minimum diameter of the powder), thereby effectively blocking the entry of powder into the inside of the roller powder-laying roller 13.

[0028] The aforementioned outlet is arc-shaped.

[0029] Two blades 11 are symmetrically provided on both sides of the powder-laying roller 13, and the blades 11 are radially movable to adjust the thickness of the powder laid in each layer in order to lay the fallen powder uniformly and evenly.

[0030] A powder adsorption device 12 is provided above the inside of the powder laying roller 13. The powder adsorption device 12 uniformly and firmly adsorbs powder onto the surface of the powder laying roller 13 by drawing in air. The powder adsorption device 12 is also used to apply an electric charge to the powder laying roller 13 and further adsorb the fallen powder onto the powder laying roller 13.

[0031] A powder discharge device 14 is provided on the inside lower part of the powder laying roller 13 to discharge a charge opposite to the charge applied by the powder adsorption device 12, and to lay the powder at the corresponding position on the powder laying roller 13 onto the lower printing platform.

[0032] The printing platform is mounted in the center of the device and consists of a lifting platform 5 that can move up and down. The lifting platform 5 is driven up and down by a single filament rod, and four guide rods are attached around its circumference to ensure the stability of the platform's movement.

[0033] The powder adsorption device 12 releases a constant Coulomb force, thereby adsorbing the powder that has just come out of the supply port 10 onto the powder laying roller 13.

[0034] The powder-laying roller 13 has a constant negative pressure inside, and under the action of this negative pressure, the powder is further adsorbed onto the powder-laying roller 13. Because the diameter of the pores on the surface of the powder-laying roller 13 is smaller than the diameter of the powder particles, the powder does not enter the inside of the powder-laying roller 13.

[0035] A fine nozzle head with the same diameter as the holes on the surface of the powder laying roller 13 is positioned on the underside of the powder discharge device 14. When the area on the powder laying roller 13 where powder laying is required rotates to a relative position, the nozzle head at the corresponding position of the powder discharge device 14 starts to operate, quantitatively ejecting an airflow at a constant pressure, thereby providing sufficient force to the powder below to resist the negative pressure suction force and lay it on the lifting platform 5.

[0036] The rotational position of the powder-laying roller 13 and the opening position of the nozzle head valve of the powder discharge device 14 are controlled collectively by the system.

[0037] The operating principle or method of the present invention is as follows.

[0038] As shown in Figures 7 to 9, powder a enters the right-side supply port 10 of the powder laying tank 4 from the right-side powder supply hopper a6, and powder b enters the left-side supply port 10 of the powder laying tank 4 from the left-side powder supply hopper b7, and the powder falls from the supply ports 10. Through the action of the powder adsorption device 12, the powder adsorption device 12 applies a Coulomb force to the powder, and combined with the negative pressure inside the powder laying roller 13, the powder is uniformly adsorbed onto the outer surface of the powder laying roller 13. The powder laying tank 4 is translated to the left, the powder laying roller 13 rotates counterclockwise, the blades 11 flatten the powder, and when the powder laying roller 13 moves to the corresponding position, the powder discharge device 14 begins to operate. The nozzle heads at the corresponding positions of the powder discharge device 14 begin to operate, quantitatively ejecting a constant pressure airflow, thereby providing sufficient force to resist the negative pressure suction force on the powder below, and laying the corresponding powder at the corresponding positions onto the printing stage. When the adhesive spray device 3 moves forward and reaches the corresponding position, the heating coil operates, and the corresponding adhesive nozzle 16 drips adhesive, which is further cured by irradiation from the rear near-infrared lamp 17. The lifting platform 5 moves to the lower layer. The above process is repeated until printing is complete, the model is removed, placed in the furnace for sintering, and after a series of post-processing steps, printing is complete. [Explanation of Symbols]

[0039] In the diagram 1. Case 2. Powder inlet 3. Adhesive spraying device 4. Powder laying tank 5. Elevator platform 6. Powder supply hopper a 7. Powder supply hopper b 8, powder laying device a 9, powder laying device b 10. Supply port 11. Blade 12, powder adsorption device 13. Powder laying roller 14, powder discharge device 15. Adhesive storage chamber 16. Adhesive nozzle 17. Near-infrared lamp

Claims

1. An adhesive spraying and addition processing manufacturing apparatus based on a selective powder laying mode, Including a case (1), a powder inlet (2) is provided above the case (1). An adhesive spraying and addition processing manufacturing apparatus based on a selective powder laying mode, characterized in that an adhesive spraying device (3) is installed inside the case (1), the adhesive spraying device (3) includes a plurality of adhesive storage chambers (15), a single guide rod is connected to the lower end of each of the plurality of adhesive storage chambers (15), and an adhesive nozzle (16) is attached to the lower end of each of the guide rods.

2. The adhesive spraying device (3) is fixed and moved by four guide rails connected to the inner wall of the case (1), and the four guide rails include two guide rails at the upper end and two guide rails on both sides. The two guide rails at the upper end are clean belt-type electric sliders that control the movement of the adhesive spraying device (3). The adhesive spraying and addition processing manufacturing apparatus based on a selective powder laying mode according to claim 1, characterized in that the two guide rails on both sides are ball slide rails and fix the adhesive spraying device (3).

3. The adhesive spraying and addition processing apparatus based on a selective powder laying mode according to claim 1, characterized in that the adhesive nozzles (16) are arranged in three rows, and a small heating coil is attached above each adhesive nozzle (16).

4. The adhesive spraying and addition processing apparatus based on a selective powder laying mode according to claim 3, characterized in that a plurality of near-infrared lamps (17) are further attached behind the adhesive nozzle (16), and the near-infrared lamps (17) consist of two rows of near-infrared lamp beads.

5. The aforementioned powder inlet (2) includes a powder supply hopper a (6) and a powder supply hopper b (7), The upper opening of the powder supply hopper a(6) is a rectangle that contracts downwards to become smaller, The adhesive spraying and processing manufacturing apparatus based on a selective powder laying mode according to claim 1, characterized in that the powder supply hopper b (7) has the same shape as the powder supply hopper a (6).

6. The adhesive spraying and adding processing apparatus based on a selective powdering mode according to claim 5, characterized in that a powder laying tank (4) is installed inside the case (1), below the powder supply hopper a (6) and the powder supply hopper b (7), and two guide rails for fixing and moving the powder laying tank (4) are installed below the powder laying tank (4), and the guide rails are clean belt-type electric sliders.

7. The powder spreading tank (4) includes a powder spreading device a (8) and a powder spreading device b (9), and two supply ports (10) are opened inside the upper part of the powder spreading device a (8) and the powder spreading device b (9), and discharge ports are opened at opposite ends of the supply ports (10). The adhesive spraying and adding processing apparatus based on a selective powder laying mode according to claim 6, characterized in that one powder laying roller (13) is attached near each of the two aforementioned discharge ports, blades (11) are attached to both sides of the powder laying roller (13), and a powder adsorption device (12) and a powder discharge device (14) are mounted symmetrically in the upper and lower parts inside the powder laying roller (13).

8. Pores are distributed across the entire surface of the powder-laying roller (13). The adhesive spraying and processing manufacturing apparatus based on a selective powder laying mode according to claim 7, characterized in that the diameter of the hole is <1 μm.

9. A nozzle head with the same diameter as the hole made on the surface of the powder dispensing device (13) is positioned on the lower surface of the powder dispensing device (14). The adhesive spraying and adding processing apparatus based on a selective powder laying mode according to claim 8, characterized in that the valves of the powder laying roller (13) and the nozzle head of the powder discharge device (14) are wirelessly connected to a monitoring system.

10. A printing platform is further attached to the middle of the lower inside of the case (1). The adhesive spraying and processing manufacturing apparatus based on a selective powder laying mode according to claim 6, characterized in that the printing platform consists of a lifting platform (5) that can be raised and lowered, the lifting platform (5) is driven by a single filament rod to move up and down, and four guide rods are attached around its four sides to ensure the stability of the platform's raising and lowering.

Images