CN216760821U - 3D printer for paraffin material - Google Patents

Abstract

The utility model discloses a paraffin material 3D printer, which comprises a screw extruder and a remote feeding device, wherein the remote feeding device comprises a pressure charging barrel, a pressure gauge and a compressed air pipe are arranged on the pressure charging barrel, the other end of the compressed air pipe is connected with an air compressor, a bottom contact discharging pipe is also arranged on the pressure charging barrel, the feeding end of the bottom contact discharging pipe extends into the pressure charging barrel, the discharging end of the bottom contact discharging pipe is connected with one end of a silica gel material pipe, the other end of the silica gel material pipe is connected with the screw extruder, and a printing platform is arranged below the screw extruder. The characteristic that temperature control range is big can adapt to the printing of different paraffin class materials, has the extrusion precision height, and characteristics such as once feed many are fit for printing various large-scale paraffin class products.

Description

3D printer for paraffin material

Technical Field

The utility model relates to the technical field of 3D printing, in particular to a 3D printer for paraffin materials.

Background

FDM is an abbreviation for "Fused Deposition Modeling", i.e., a Deposition Modeling method, in which various wires (e.g., engineering plastics such as ABS, polycarbonate PC, etc.) are heated and melted to form a stack. The FDM working principle is as follows: the heating nozzle is controlled by a computer to do X-Y plane motion according to the section profile information of a product part, the thermoplastic filamentous material is sent to the hot melting nozzle by a filament supply mechanism, is heated and melted into semi-liquid state in the nozzle, is extruded out, is selectively coated on a workbench, and forms a layer of sheet profile with the thickness of about 0.127mm after being rapidly cooled. After the section of one layer is formed, the workbench descends by a certain height, then cladding of the next layer is carried out, the section outline is 'drawn' layer by layer, and the steps are repeated, so that the three-dimensional product part is finally formed. Most of the existing 3D printers cannot support 3D printing of a plurality of paraffin materials as printing materials, and have the defects of poor extrusion precision, less one-time loading and the like.

Disclosure of Invention

The utility model aims to realize that a paraffin material is used as a printing device of a 3D printing material, the characteristics of large extrusion torque and large temperature control amplitude can be suitable for printing of different paraffin materials, and the printing device has the characteristics of high extrusion precision, more material loading at one time and the like and is suitable for printing various large paraffin products.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a paraffin material 3D printer, includes screw extruder and long-range material feeding unit, long-range material feeding unit includes the pressure feed cylinder, be provided with manometer and compressed air pipe on the pressure feed cylinder, air compressor is connected to compressed air pipe's the other end, still be provided with on the pressure feed cylinder and touch end discharging pipe, the feed end that touches end discharging pipe stretches into inside the pressure feed cylinder, the discharge end that touches end discharging pipe is connected with the one end of silica gel material pipe, the other end of silica gel material pipe with screw extruder connects, screw extruder's below is provided with print platform.

Preferably, the silica gel material pipe is wrapped with a heating wire.

Preferably, the outer side wall of the pressure charging barrel is coated with a heat preservation ring, the heat preservation ring is an annular heat preservation ring and is used for raising the temperature of the pressure charging barrel to 60-80 ℃ of the melting temperature of the paraffin printing material, keeping the temperature and keeping the melting state of the internal material.

Preferably, the screw extruder includes step motor, extrudes screw rod, storage silo and screw rod and beats printer head, step motor's output shaft pass through the stainless steel shaft coupling with extrude the screw rod and connect, the feed end of extruding the screw rod is provided with the storage silo, the storage silo has the feed inlet through the pipe connection, the discharge end cover of extruding the screw rod is equipped with the screw rod and extrudes the sleeve, the telescopic end of screw rod extrusion is installed screw rod and is beaten printer head.

Preferably, the storage bin is externally coated with a first heating device, a connecting copper column is arranged between the stepping motor and the first heating device, and a second heating device is arranged at the joint of the screw extrusion sleeve and the screw printing head.

Preferably, the second heating device is internally provided with a micro heating rod, a temperature control probe and a temperature controller.

Compared with the prior art, the utility model solves the following key problems and achieves the corresponding technical effects:

1. remote feeding: the paraffin printing material is stored in the pressure charging barrel, so that high-capacity consumable material filling can be realized, a printing device can print a large model by one-time charging, the weight of a printing head is obviously reduced, the movement inertia of the printing device is reduced, the printing working speed of the printing device is increased, and the printing efficiency is further improved.

2. Mixing and extruding; the solid paraffin material is firstly heated to 120 ℃ in a pressure charging barrel to be melted into high-fluidity liquid, 0.3-0.8 MPa of compressed air is output to the pressure charging barrel by an air compressor, and the liquid paraffin printing material is pumped to a storage bin of a screw printer through a silica gel material pipe with a built-in heating wire. At the moment, the heating wire silica gel heat preservation hose is heated to 70-80 ℃ to keep the paraffin printing material in a liquid state. The temperature of the storage bin part of the screw printing head is kept at 65-75 ℃ so that the liquid paraffin material flow is reduced and material leakage is prevented. And extruding the semi-molten material into a printing nozzle through a screw to be extruded, printed and molded. When the printing head is used for printing and extruding, the printing nozzle can be heated by the heating device to 3-5 degrees higher than the temperature of the printing head storage bin, so that the material circulation of the paraffin printing material is improved. The paraffin printing extrusion speed is accurately controlled through the temperature difference of different positions. High-speed and high-precision printing is realized.

3. Multiplexing the printing materials; the paraffin printing material can be directly recycled, other processing is not needed, the printing cost is greatly reduced, the loss of printing failure is reduced, the model of printing failure can be directly placed into the pressure charging barrel for heating and recycling, and the material waste is prevented.

Drawings

FIG. 1 is a schematic overall structure diagram of an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of a screw extruder according to an embodiment of the present invention;

FIG. 3 is a partial schematic view of a pressure cartridge according to an embodiment of the present invention;

in the figure: 1. an FDM printer; 2. a screw extruder; 3. a silica gel material pipe; 4. a pressure gauge; 5. a compressed air pipe; 6. a heat preservation ring; 7. a printing platform; 8. a pressure charging barrel; 9. a stepping motor; 10. connecting the copper columns; 11. a stainless steel coupler; 12. a storage bin; 13. a first heating device; 14. extruding a sleeve by a screw; 15. Extruding a screw; 16. a feed inlet; 17. a second heating device; 18. a screw print head; 19. heating wires; 20. A bottom contact discharge pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: the utility model provides a paraffin material 3D printer, includes screw extruder 2 and long-range material feeding unit, long-range material feeding unit includes pressure feed cylinder 8, be provided with manometer 4 and compressed air pipe 5 on the pressure feed cylinder 8, air compressor is connected to compressed air pipe 5's the other end, still be provided with on the pressure feed cylinder 8 and touch end discharging pipe 20, the feed end that touches end discharging pipe 20 stretches into inside the pressure feed cylinder 8, the discharge end that touches end discharging pipe 20 is connected with the one end of silica gel material pipe 3, the other end of silica gel material pipe 3 with screw extruder 2 is connected, the below of screw extruder 2 is provided with print platform 7.

Specifically, through the temperature cooperation between the air compressor, the pressure charging barrel 8, the silica gel material pipe 3 and the screw printing head 18, the fluidity of the printing material at different stages changes according to requirements, and the printing effect and efficiency are greatly improved. Firstly, heating a solid paraffin material to 120 ℃ in a pressure charging barrel 8 to melt the solid paraffin material into high-fluidity liquid, wherein the temperature is highest and the paraffin fluidity is best; meanwhile, the air compressor can press the liquid paraffin printing material in the pressure charging barrel 8 into the feeding hole 16 of the screw extruder 2 through the silica gel material pipe 3 by using compressed air with lower pressure, and further enters the storage bin 12, at the moment, the temperature of the silica gel material pipe 3 is kept at 70-80 ℃ under the assistance of the heating wire 19, and the fluidity of the paraffin printing material is normal; the connecting part of the feed inlet 16 of the screw extruder and the storage bin 12 is also provided with a first heating device 13, and the temperature of the storage bin 12 is kept at 65-75 ℃, so that the paraffin printing material is kept at low fluidity, and material leakage is prevented; at last, the paraffin printing material is extruded to the printing nozzle through the screw rod for extrusion molding, and at the moment, the first heating device 13 of the printing nozzle can finely adjust the printing temperature according to the extrusion requirement, so that the extrusion is more stable.

As a preferred embodiment of the present invention, the silica gel material pipe is externally wrapped with a heating wire 19.

As a preferred embodiment of the utility model, the outer side wall of the pressure charging barrel 8 is coated with a heat preservation ring 6.

As a preferred embodiment of the present invention, the screw extruder 2 includes a stepping motor 9, an extrusion screw 15, a storage bin 12 and a screw print head 18, an output shaft of the stepping motor 9 is connected to the extrusion screw 15 through a stainless steel coupler 11, the storage bin 12 is disposed at a feed end of the extrusion screw 15, the storage bin 12 is connected to a feed port 16 through a pipeline, a screw extrusion sleeve 14 is sleeved at a discharge end of the extrusion screw 15, and the screw print head 18 is mounted at a tail end of the screw extrusion sleeve 14.

As a preferred embodiment of the present invention, the exterior of the storage bin 12 is covered with a first heating device 13, a connecting copper column 10 is disposed between the stepping motor 9 and the first heating device 13, and a second heating device 17 is disposed at a connection position between the screw extrusion sleeve 14 and the screw print head 18.

In a preferred embodiment of the present invention, a micro heating rod, a temperature control probe and a temperature controller are disposed in the second heating device 17.

Specifically, the paraffin printing material heated to liquid state enters the storage bin 12 through the feeding port 16, and the temperature of the material is slightly reduced, so that the fluidity of the paraffin printing material is reduced, and the phenomenon of material leakage is reduced. Then, the stepping motor 9 drives the extrusion screw 15 to pump the liquid paraffin printing material in the storage bin 12 to the bolt printing head 18, the temperature of the screw extrusion sleeve 14 from the storage bin 12 to the bolt printing head 18 slowly rises to the highest temperature when the bolt extrusion sleeve is used for printing, the fluidity of the material is increased, and finally the paraffin printing material is extruded and molded.

The working process of the utility model is as follows: the prepared paraffin material is sent into a pressure charging barrel 8 and is pressurized to 0.5-0.8 MPa, and the solid paraffin material is melted into a liquid paraffin printing material; a pressure charging barrel 8 is extruded by air pressure, and the paraffin printing material melted into liquid enters a screw extruder 2 through a heated and constant-temperature silica gel material pipe 3;

the heating wire 19 which generates heat is arranged in the silica gel material pipe 3, so that the material pipe can be heated to 60-120 ℃, and the silica material has a good heat preservation effect, so that the paraffin printing material can not be solidified when the pressure charging barrel 8 enters the screw extruder 2;

the liquid paraffin printing material entering the screw extruder 2 is extruded to the screw printing head 18 by the screw to be extruded to the heatable printing platform 7 for printing and forming, at the moment, the heatable printing platform 7 should be kept at the temperature of 40-60 ℃, and then corresponding printing work is carried out.

Compared with the prior art, the utility model solves the following key problems and achieves the corresponding technical effects:

1. remote feeding: the paraffin printing material is stored in the pressure charging barrel 8, so that high-capacity consumable material filling can be realized, a printing device can print a large model by filling once, the weight of a printing head is obviously reduced, the movement inertia of the printing device is reduced, the printing working speed of the printing device is increased, and the printing efficiency is further improved.

2. Mixing and extruding; the solid paraffin material is firstly heated to 120 ℃ in a pressure charging barrel 8 and melted into high-fluidity liquid, 0.3-0.8 MPa of compressed air is output to the pressure charging barrel 8 by an air compressor, and the liquid paraffin printing material is pumped to a storage bin 12 of a screw printer 2 through a silica gel material pipe 3 with a built-in heating wire 19. At the moment, the heating wire silica gel heat preservation hose is heated to 70-80 ℃ to keep the paraffin printing material in a liquid state. The temperature of the portion of the storage bin 12 of the screw head 18 is maintained at 65-75 degrees celsius so that the flow of the liquid paraffin material is reduced to prevent leakage. And extruding the semi-molten material into a printing nozzle through a screw to be extruded, printed and molded. When the printing head is extruded, the printing head can be heated by the heating device to 3-5 degrees higher than the temperature of the printing head storage bin 12, so that the material circulation of the paraffin printing material is improved. The paraffin printing extrusion speed is accurately controlled through the temperature difference of different positions. High-speed and high-precision printing is realized.

3. Multiplexing the printing materials; the paraffin printing material can be directly recycled, other processing is not needed, the printing cost is greatly reduced, the loss of printing failure is reduced, the model of printing failure can be directly placed into the pressure charging barrel 8 for heating and recycling, and the material waste is prevented.

Claims (6)

1. The utility model provides a paraffin material 3D printer, a serial communication port, including screw extruder (2) and long-range material feeding unit, long-range material feeding unit includes pressure feed cylinder (8), be provided with manometer (4) and compressed air pipe (5) on pressure feed cylinder (8), air compressor is connected to the other end of compressed air pipe (5), still be provided with on pressure feed cylinder (8) and touch end discharging pipe (20), the feed end that touches end discharging pipe (20) stretches into inside pressure feed cylinder (8), the discharge end that touches end discharging pipe (20) is connected with the one end of silica gel material pipe (3), the other end of silica gel material pipe (3) with screw extruder (2) are connected, the below of screw extruder (2) is provided with printing platform (7).

2. The paraffin material 3D printer according to claim 1, characterized in that the outside of the silica gel material tube (3) is coated with heating wires (19).

3. 3D printer according to claim 1, characterized in that the outer side wall of the pressure cylinder (8) is covered with a heat-insulating ring (6).

4. The paraffin material 3D printer according to claim 1, wherein the screw extruder (2) comprises a stepping motor (9), an extrusion screw (15), a storage bin (12) and a screw printing head (18), an output shaft of the stepping motor (9) is connected with the extrusion screw (15) through a stainless steel coupler (11), the storage bin (12) is arranged at a feed end of the extrusion screw (15), the storage bin (12) is connected with a feed inlet (16) through a pipeline, a screw extrusion sleeve (14) is sleeved at a discharge end of the extrusion screw (15), and the screw printing head (18) is installed at the tail end of the screw extrusion sleeve (14).

5. The 3D paraffin material printer according to claim 4, wherein the storage bin (12) is externally coated with a first heating device (13), a connecting copper column (10) is arranged between the stepping motor (9) and the first heating device (13), and a second heating device (17) is arranged at the joint of the screw extrusion sleeve (14) and the screw printing head (18).

6. The 3D printer for the paraffin material as claimed in claim 5, wherein the second heating device (17) is provided with a micro heating rod, a temperature control probe and a temperature controller.

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