CN113459509B - Additive manufacturing equipment and method with multiple coupled forming modes - Google Patents
Additive manufacturing equipment and method with multiple coupled forming modes Download PDFInfo
- Publication number
- CN113459509B CN113459509B CN202110613888.6A CN202110613888A CN113459509B CN 113459509 B CN113459509 B CN 113459509B CN 202110613888 A CN202110613888 A CN 202110613888A CN 113459509 B CN113459509 B CN 113459509B
- Authority
- CN
- China
- Prior art keywords
- printing
- axis
- forming
- mounting plate
- module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/10—Processes of additive manufacturing
- B29C64/106—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
- B29C64/124—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified
- B29C64/129—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified characterised by the energy source therefor, e.g. by global irradiation combined with a mask
- B29C64/135—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified characterised by the energy source therefor, e.g. by global irradiation combined with a mask the energy source being concentrated, e.g. scanning lasers or focused light sources
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
- B29C64/205—Means for applying layers
- B29C64/214—Doctor blades
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
- B29C64/227—Driving means
- B29C64/232—Driving means for motion along the axis orthogonal to the plane of a layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
- B29C64/227—Driving means
- B29C64/236—Driving means for motion in a direction within the plane of a layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
- B29C64/295—Heating elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/30—Auxiliary operations or equipment
- B29C64/307—Handling of material to be used in additive manufacturing
- B29C64/321—Feeding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/30—Auxiliary operations or equipment
- B29C64/307—Handling of material to be used in additive manufacturing
- B29C64/321—Feeding
- B29C64/336—Feeding of two or more materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y50/00—Data acquisition or data processing for additive manufacturing
- B33Y50/02—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
A multi-forming mode coupled additive manufacturing device comprises a rack, a feeding forming module, a photocuring module, a scraper module, a material extrusion module and a heat preservation module; the material extrusion module comprises a moving mechanism and an extrusion assembly for extruding printing materials, the moving mechanism is arranged on the rack, and the moving mechanism is connected with the extrusion assembly and drives the extrusion assembly to move; the feed forming module comprises a forming piston and a feed piston, a groove is formed in the frame, the heat preservation module comprises a heat preservation cylinder, a forming cavity and a feed cavity are formed in the heat preservation cylinder, the forming cavity and the feed cavity are communicated with the bottom of the groove, the forming piston is embedded into the forming cavity in a sliding mode, and the feed piston is embedded into the feed cavity in a sliding mode. The multi-forming mode coupled additive manufacturing method is further provided, and the multi-forming mode coupled additive manufacturing equipment is adopted. The invention can control the viscosity of printing materials, ensure high precision and simultaneously realize multi-material printing and multi-material variable-concentration printing, and belongs to the technical field of additive manufacturing.
Description
Technical Field
The invention relates to the technical field of additive manufacturing, in particular to additive manufacturing equipment and method with coupled multiple forming modes.
Background
The 3D printing technology belongs to one of the rapid forming technology processes, and a complete entity is formed by utilizing three-dimensional model data and adopting a layer-by-layer accumulation mode. The 3D printing has the characteristics of high design freedom degree of the formed parts and low cost, and is widely applied to the fields of automobile manufacturing, aerospace and the like; in the medical field, the method has important application value in the aspects of preoperative planning, orthopedic implants and the like. Due to the outstanding advantages and great application value of 3D printing, more and more scholars pay more attention to the research on the three-dimensional printing.
Common 3D printing technologies mainly include Selective Laser Sintering (SLS), stereolithography (SLA/Digital Light Projection, DLP), and Fused Deposition (FDM). However, the existing forming methods all have respective defects, and the binder in the Selective Laser Sintering (SLS) technology has direct influence on the quality of printed parts and has higher requirements on the working environment and printing equipment; the photocuring technology can realize high-precision printing, but is difficult to realize multi-material printing, wherein the SLA technology is point forming, so that the printing speed is low, and the DLP technology of surface forming greatly improves the printing efficiency; fused deposition techniques are flexible, but have poor printing accuracy and slow speed.
In addition, the temperature of the material is often required during printing, which is particularly prominent in the field of bioprinting, and a common printer is not equipped with a heat preservation system, which affects the printing quality and even can not print.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention aims to: provided are additive manufacturing equipment and method for coupling multiple molding modes, wherein the viscosity and the fluidity of a printing material can be regulated and controlled.
In order to achieve the purpose, the invention adopts the following technical scheme:
a multi-forming mode coupled additive manufacturing device comprises a rack, a feeding forming module, a photocuring module, a scraper module, a material extrusion module and a heat preservation module for preserving heat of printing materials; the material extrusion module comprises a moving mechanism and an extrusion assembly for extruding printing materials, the moving mechanism is arranged on the rack, and the moving mechanism is connected with the extrusion assembly and drives the extrusion assembly to move; the feeding molding module comprises a molding piston and a feeding piston, a groove is formed in the rack, the heat preservation module comprises a heat preservation cylinder, a molding cavity and a feeding cavity are formed in the heat preservation cylinder, the molding cavity and the feeding cavity are both communicated with the bottom of the groove, the molding piston is slidably embedded into the molding cavity, and the feeding piston is slidably embedded into the feeding cavity; the scraper module comprises a scraper moving platform and a scraper for spreading printing materials, the scraper moving platform is installed on the rack, and the scraper moving platform is connected with the scraper and drives the scraper to move; the light curing module is arranged on the frame and comprises a curing light source. After adopting this kind of structure, the top of shaping chamber and the bottom intercommunication of recess, the shaping piston is from the bottom embedding shaping intracavity of shaping chamber to form the printing space between shaping piston and the shaping chamber. The top in feed chamber and the bottom intercommunication of recess, feed piston follow the bottom embedding feed intracavity in feed chamber to form storage space between feed piston and the feed chamber.
Preferably, the heat preservation module further comprises a water pump, a water storage tank, a heating element and a temperature detection element, a heat preservation flow channel is formed in the heat preservation cylinder, the heating element and the temperature detection element are both installed in the water storage tank, the water storage tank comprises a water tank inlet and a water tank outlet, the position of the water tank inlet is lower than that of the water tank outlet, the heat preservation flow channel comprises a flow channel inlet and a flow channel outlet, the position of the flow channel inlet is higher than that of the flow channel outlet, the water tank outlet is communicated with the flow channel inlet through the water pump, and the water tank inlet is communicated with the flow channel outlet. After the structure is adopted, heated water is pumped into the heat-preservation flow channel from the water storage tank through the water pump, flows out through the heat-preservation flow channel and then flows back into the water storage tank, and the heat preservation effect on the heat preservation cylinder is achieved.
Preferably, the moving mechanism comprises an X-axis moving platform for driving the extrusion assembly to translate along an X axis, a Y-axis moving platform for driving the extrusion assembly to translate along a Y axis, and a Z-axis moving platform for driving the extrusion assembly to translate along a Z axis; the direction of the X axis is horizontal, the direction of the Y axis is horizontal and vertical to the X axis, and the direction of the Z axis is vertical. After adopting this kind of structure, moving mechanism drives and extrudes the subassembly and move in three-dimensional space.
Preferably, the extrusion assembly comprises a needle cylinder, a needle cylinder mounting plate, a pressure lever, a discharging motor and a screw rod, the needle cylinder is fixedly connected with the needle cylinder mounting plate, a needle head of the needle cylinder faces downwards, and the pressure lever is slidably embedded into the needle cylinder; the discharge motor is arranged on the needle cylinder mounting plate and is connected with the pressure rod through a screw rod and drives the pressure rod to slide in the needle cylinder.
Preferably, the moving mechanism further comprises an X-axis mounting plate and a Z-axis mounting plate; the Y-axis moving platform is installed on the rack, the X-axis moving platform is connected with the Y-axis moving platform through the X-axis installation plate, the X-axis moving platform is driven by the Y-axis moving platform to translate along the Y axis, the Z-axis moving platform is connected with the X-axis moving platform through the Z-axis installation plate, the Z-axis moving platform is driven by the X-axis moving platform to translate along the X axis, and the Z-axis moving platform is connected with the extrusion assembly and drives the extrusion assembly to translate along the Z axis.
Preferably, the rack comprises a first mounting plate, a second mounting plate and a frame, the first mounting plate is horizontally arranged and fixedly connected with the frame, the groove is formed in the first mounting plate, the opening of the groove faces upwards, and the forming cavity and the feeding cavity are both positioned below the groove; the second mounting plate is fixedly connected with the framework and is positioned below the first mounting plate, the first mounting plate is parallel to the second mounting plate, and the water storage tank and the water pump are both mounted on the second mounting plate; be equipped with a plurality of stands between first mounting panel and the second mounting panel.
Preferably, the forming and feeding module further comprises a first lifting platform and a second lifting platform, the first lifting platform and the second lifting platform are both installed on the frame, the first lifting platform is connected with the feeding piston and drives the feeding piston to lift, the second lifting platform is connected with the forming piston and drives the forming piston to lift, and the printing platform is installed on the forming piston.
Preferably, the molding cavity and the feeding cavity are both of a columnar structure, the heat-insulation runner surrounds the outer sides of the molding cavity and the feeding cavity, the center lines of the molding cavity and the feeding cavity are vertical, and the projection of the heat-insulation runner on the horizontal plane is in an 8 shape.
A multi-forming mode coupling additive manufacturing method adopts the multi-forming mode coupling additive manufacturing equipment, and comprises the following steps:
s1, filling printing materials;
s2, starting the water pump, and setting the heating temperature of the heating element;
s3, observing the temperature detected by the temperature detecting element, and starting printing after reaching the set temperature;
s4, controlling the forming piston to descend by the thickness of one printing layer;
s5, if the current printing layer needs multi-material printing or multi-material variable-concentration printing, calculating a material extrusion path, controlling a moving mechanism to drive an extrusion assembly to move above a molding cavity, extruding the printing material in the extrusion assembly along the material extrusion path, and then controlling a curing light source to cure the extruded printing material; if the current printing layer does not need multi-material printing or multi-material variable-density printing, skipping the step;
s6, controlling the feeding piston to move upwards to push the required printing material into the groove;
s7, the scraper moving platform controls the scraper to move, and the printing material in the groove is paved on the forming cavity;
s8, controlling a curing light source to selectively cure the paved printing material;
s9, controlling the forming piston to descend by the thickness of one printing layer;
s10, resetting the scraper;
s11, repeating the steps S5-S10 until the printing is finished.
Preferably, in step S5, if the current printing layer needs multi-material variable density printing, the minimum resolution of the material extrusion module is one microcell, the current printing layer is uniformly divided into a plurality of material units, each material unit is divided into a plurality of microcells, the proportion of the printing material to the microcells is calculated according to the required density in each material unit, and the material extrusion path is calculated according to the proportion of the printing material to the microcells in each material unit.
The multi-material printing is a printing mode which adopts two printing materials and the two printing materials are formed independently, and the multi-material variable-concentration printing is a printing mode which adopts the two printing materials and the two printing materials are mixed and formed in different proportions.
When printing, steps S1-S11 are executed in sequence; in step S11, steps S5 to S10 are repeated, and steps S5 to S10 are sequentially executed.
When the scraper resets, descend print platform a certain distance earlier, prevent that the scraper from destroying the shaping material, carry out the scraper again and reset, then rise print platform to the normal position again.
In summary, the present invention has the following advantages:
(1) the invention integrates a material extrusion module based on multi-axis linkage on a photocuring molding system, one printing material is stored in a feeding cavity of a heat-insulating cylinder, the other material is stored in a needle cylinder of the extrusion system, and the material is extruded in a specific time and space by matching with the needle cylinder of an extrusion assembly on the basis of printing mainly by the material in the feeding cavity, so that the multi-material printing can be realized while the high-efficiency and high-precision molding is ensured by photocuring.
(2) The invention provides a method for printing three-dimensional parts with different material concentrations at different positions by changing material components in material units at different positions in a three-dimensional model and printing the three-dimensional parts with different material concentrations at different positions by using a minimum resolution in a forming mode with the lowest resolution as a micro unit, using a plurality of micro units as a material unit and adjusting different forming modes or the proportion of different materials to the micro units in the material unit through the cooperation among forming systems so as to realize the in-situ regulation and control of the material concentrations in the material unit.
(3) The invention integrates a heat preservation system mainly composed of a heat preservation cylinder, a water pump, a water storage tank and a heating element, and can heat the printing material and play a role in heat preservation, thereby realizing the precise regulation and control of the physical and chemical properties of the material, particularly the viscosity and the fluidity of the material, ensuring that various materials are accurately conveyed to a designated area, and ensuring that the equipment can achieve the optimal forming precision when forming different materials.
Drawings
Fig. 1 is a perspective view of a multi-mode coupled additive manufacturing apparatus.
Fig. 2 is an enlarged view of a portion of an additive manufacturing apparatus coupled in multiple forming modes.
Fig. 3 is a perspective view of the moving mechanism and the first mounting plate.
Fig. 4 is a schematic view of another view of the moving mechanism and the first mounting plate.
FIG. 5 is a perspective view of the warming cylinder.
FIG. 6 is a schematic view showing the internal structure of the heat-retaining cylinder.
Fig. 7 is a partial schematic view of a feed forming module.
Fig. 8 is a perspective view of the reservoir.
Fig. 9 is a flow chart of a multi-mode coupled additive manufacturing method.
Wherein, 1 is the frame, 2 is the photocuring module, 3 is the scraper module, 4 is feed shaping module, 5 is the heat preservation module, 6 is material extrusion module.
31 is a scraper, 32 is a scraper moving platform, and 33 is a scraper moving guide rail.
A forming piston 41, a feeding piston 42 and a printing platform 43.
The heat preservation cylinder 51, the molding cavity 52, the feeding cavity 53, the heat preservation flow channel 54, the flow channel outlet 55, the flow channel inlet 56, the water tank inlet 57 and the water tank outlet 58 are respectively arranged in the mold.
An X-axis moving platform 61, a Y-axis moving platform 62, a Z-axis moving platform 63, an X-axis mounting plate 64, a Z-axis mounting plate 65, a syringe mounting plate 66, a syringe 67, a pressure lever 68 and a discharge motor 69.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments.
As shown in fig. 1 to 8.
A multi-forming mode coupled additive manufacturing device comprises a rack, a feeding forming module, a photocuring module, a scraper module, a material extrusion module and a heat preservation module for preserving heat of a printing material; the material extrusion module comprises a moving mechanism and an extrusion assembly for extruding printing materials, the moving mechanism is arranged on the rack, and the moving mechanism is connected with the extrusion assembly and drives the extrusion assembly to move; the feeding forming module comprises a forming piston and a feeding piston, a groove is formed in the rack, the heat preservation module comprises a heat preservation cylinder, a forming cavity and a feeding cavity are formed in the heat preservation cylinder, the forming cavity and the feeding cavity are both communicated with the bottom of the groove, the forming piston is slidably embedded into the forming cavity, and the feeding piston is slidably embedded into the feeding cavity; the scraper module comprises a scraper moving platform and a scraper for spreading printing materials, the scraper moving platform is installed on the rack, and the scraper moving platform is connected with the scraper and drives the scraper to move; the light curing module is arranged on the rack and comprises a curing light source.
The heat preservation module still includes water pump, water storage box, heating element, temperature detection component, it has the heat preservation runner to open on the heat preservation jar, heating element and temperature detection component are all installed in the water storage box, and the water storage box includes water tank entry and water tank export, and the position of water tank entry is less than the water tank export, and the heat preservation runner includes runner entry and runner export, and the position of runner entry is higher than the runner export, and the water tank export communicates through water pump and runner entry, and water tank entry and runner export communicate.
The moving mechanism comprises an X-axis moving platform for driving the extrusion assembly to translate along an X axis, a Y-axis moving platform for driving the extrusion assembly to translate along a Y axis, and a Z-axis moving platform for driving the extrusion assembly to translate along a Z axis; the direction of the X axis is horizontal, the direction of the Y axis is horizontal and vertical to the X axis, and the direction of the Z axis is vertical.
The extrusion assembly comprises a needle cylinder, a needle cylinder mounting plate, a pressing rod, a discharging motor and a screw rod, the needle cylinder is fixedly connected with the needle cylinder mounting plate, a needle head of the needle cylinder faces downwards, and the pressing rod is slidably embedded into the needle cylinder; the discharge motor is arranged on the needle cylinder mounting plate and is connected with the pressure rod through a screw rod and drives the pressure rod to slide in the needle cylinder.
The moving mechanism also comprises an X-axis mounting plate and a Z-axis mounting plate; the Y-axis moving platform is installed on the rack, the X-axis moving platform is connected with the Y-axis moving platform through the X-axis installation plate, the X-axis moving platform is driven by the Y-axis moving platform to translate along the Y axis, the Z-axis moving platform is connected with the X-axis moving platform through the Z-axis installation plate, the Z-axis moving platform is driven by the X-axis moving platform to translate along the X axis, and the Z-axis moving platform is connected with the extrusion assembly and drives the extrusion assembly to translate along the Z axis.
The frame comprises a first mounting plate, a second mounting plate and a frame, the first mounting plate is horizontally arranged and fixedly connected with the frame, the groove is formed in the first mounting plate, the opening of the groove is upward, and the forming cavity and the feeding cavity are both positioned below the groove; the second mounting plate is fixedly connected with the framework and is positioned below the first mounting plate, the first mounting plate is parallel to the second mounting plate, and the water storage tank and the water pump are both mounted on the second mounting plate; a plurality of upright posts are arranged between the first mounting plate and the second mounting plate.
The forming and feeding module further comprises a first lifting platform and a second lifting platform, the first lifting platform and the second lifting platform are both mounted on the frame, the first lifting platform is connected with the feeding piston and drives the feeding piston to lift, the second lifting platform is connected with the forming piston and drives the forming piston to lift, and the printing platform is mounted on the forming piston.
The molding cavity and the feeding cavity are both of columnar structures, the heat-insulation flow channel surrounds the outer sides of the molding cavity and the feeding cavity, the center lines of the molding cavity and the feeding cavity are vertical, and the projection of the heat-insulation flow channel on the horizontal plane is in a shape like a Chinese character '8'.
The heating element is a heating rod which is commercially available and can automatically control the temperature, and the temperature detecting element is a temperature detector.
The scraper module also comprises a scraper moving guide rail, the scraper moving guide rail is fixedly connected with the first mounting plate, the scraper moving platform is mounted on the first mounting plate, a moving block is connected on the scraper moving guide rail in a sliding manner, and the scraper is fixedly connected with the scraper moving block; the moving mechanism further comprises a Y-axis moving guide rail, the Y-axis moving guide rail is fixedly connected with the first mounting plate, and the X-axis moving platform is connected with the Y-axis moving guide rail in a sliding mode.
The light curing module further comprises a light source fixing plate, the curing light source is connected with the rack through the light source fixing plate, and the curing light source adopts a light machine module.
The discharge motor adopts a stepping motor and is connected with the screw rod through a coupler, and the transmission motion drives the pressure rod to move during working, so that the material in the needle cylinder is extruded. X axle moving platform, Y axle moving platform, Z axle moving platform, scraper moving platform all adopt sharp module, and first lift platform, second lift platform all adopt the electric jar, and all are driven by servo motor.
The quantity of stand is 4, installs four corner positions in first mounting panel below respectively to through bolt and frame fixed connection, and the both ends face of stand is opened there is the locating hole, is used for the location between first mounting panel, second mounting panel and the stand, ensures to have certain depth of parallelism between first mounting panel and the second mounting panel.
The printing platform is arranged on the upper surface of the forming piston. First lift platform all installs on the second mounting panel with second lift platform. Rubber sealing rings are sleeved on the peripheries of the forming piston and the feeding piston.
The water storage tank is of a cuboid structure, the water tank inlet and the water tank outlet are respectively located on two opposite outer side faces of the water storage tank, and the flow channel inlet and the flow channel outlet are both located on the outer side of the heat preservation cylinder. The water tank inlet, the water tank outlet, the flow channel inlet and the flow channel outlet are respectively provided with an outward extending round nozzle pipe, the round nozzle pipe at the water tank inlet is connected with the round nozzle pipe at the flow channel outlet through a hose, the round nozzle pipe at the water tank outlet is connected with the input end of a water pump through a hose, and the output end of the water pump is connected with the round nozzle pipe at the flow channel inlet through a hose.
The top surface of the water storage tank is provided with a first mounting hole and a second mounting hole, the heating rod is mounted in the water storage tank through the first mounting hole, the temperature detection element is mounted in the water storage tank through the second mounting hole, the first mounting hole is close to the water tank inlet relative to the second mounting hole, and the second mounting hole is close to the water tank outlet relative to the first mounting hole.
The heat-insulating flow passage is circular in cross section and is surrounded in a winding and circling manner.
The water pump adopts a peristaltic pump with better sealing performance.
A multi-forming mode coupling additive manufacturing method is adopted, the multi-forming mode coupling additive manufacturing equipment is used for realizing multi-material printing, and the printing process is as follows:
firstly, filling one main printing material in a storage space enclosed by a feeding cavity and a feeding piston, and then filling the other printing material in a needle cylinder; secondly, filling water into the water storage tank, starting the peristaltic pump to enable the water to circularly flow in the heat preservation system, setting the constant temperature of the heating rod to be a specified temperature, and starting the heating rod to heat the water; then, importing the slice file of the part to be printed into the upper computer software of the printing equipment; arranging the positions of the parts to be printed in the upper computer software according to the actual conditions such as the number, the size and the like of the parts to be printed, and setting the forming parameters such as the printing layer thickness, the laser speed and the like; and then observing whether the temperature displayed on the temperature detector reaches the specified temperature or not, and starting printing after the specified temperature is reached.
The second lifting platform drives the printing platform to descend by a distance of one printing layer thickness, the printing process starts, and the needle cylinder moves to an appointed space position under the combined driving of the X-axis moving platform, the Y-axis moving platform and the Z-axis moving platform. After the printing platform and the needle cylinder reach the designated position, the discharge motor receives a control signal to drive the pressure rod to move so as to extrude the other material in the needle cylinder at the preset position. After extrusion is completed, the needle cylinder is reset, and the curing light source selectively irradiates and cures the material. Thereafter, control signal is received to first lift platform, drive feed piston upward movement, to printing material propelling movement to the recess in, the process that covers is covered to the feeding process completion and material, scraper moving platform drives the scraper with the certain speed and removes to the shaping chamber direction under the direction of scraper moving guide rail and make the even cover of printing material cover at the print platform upper surface, the process that covers is covered to the scraper removal after the assigned position, then solidification light source carries out the face exposure solidification to the printing material on the print platform according to the slicing file data, the thick distance of printing layer is printed in printing platform decline after the solidification is accomplished, the scraper resets, to this end, the printing process on a printing layer finishes, repeat above-mentioned printing process after that, the successive layer is printed to the shaping and is gone out complete part.
Example two
A multi-forming mode coupling additive manufacturing method adopts multi-forming mode coupling additive manufacturing equipment to realize multi-material variable-density printing, and the printing process is as follows.
The preparation process comprises the following steps: firstly, filling a printing material in a storage space enclosed by a feeding cavity and a feeding piston, and then filling a certain component in the printing material under the specified concentration into a needle cylinder; secondly, filling water into the water storage tank, starting the peristaltic pump to enable the water to circularly flow in the heat preservation system, setting the constant temperature of the heating rod to be a specified temperature, and starting the heating rod to heat the water; then, importing the slice file of the part to be printed into the upper computer software of the printing equipment; arranging the positions of the parts to be printed in the upper computer software according to the actual conditions such as the number, the size and the like of the parts to be printed, and setting the forming parameters such as the printing layer thickness, the laser speed and the like; and then observing whether the temperature displayed on the temperature detector reaches the specified temperature or not, and starting printing after the temperature reaches the specified temperature.
The equipment takes the minimum resolution of the material extrusion module as one microcell, takes a plurality of microcells as one material unit, plans the proportion of different materials in each material unit to the microcells according to the preset parameters of the model, and plans the time and the running path of the material extrusion module, which need to extrude the materials.
The second lifting platform drives the printing platform to descend by a distance equal to the thickness of a printing layer, the printing process starts, and the needle cylinder moves to a specified spatial position under the combined driving of the X-axis moving platform, the Y-axis moving platform and the Z-axis moving platform. After the printing platform and the needle cylinder reach the designated position, the discharge motor receives a control signal to drive the needle cylinder pressure rod to move so as to extrude the printing material in the needle cylinder at the corresponding position according to a pre-planned path. After extrusion is completed, the needle cylinder is reset by the joint motion of the three shafts, and the curing light source selectively irradiates and cures the material. Afterwards, control signal is received to first lift platform, drive feed piston upward movement, to printing material propelling movement to the recess in, the feeding process finishes and the material is spread and is covered the process and begin, scraper moving platform drives the scraper with the certain speed and removes to the shaping chamber direction under the direction of scraper moving guide rail and make printing material evenly spread and cover at the print platform upper surface, the process of spreading covers the process and finishes after the scraper moves to the assigned position, then solidification light source carries out the face exposure solidification to printing material on the print platform according to the slicing file data, afterwards, solidification light source carries out the face exposure solidification again to printing material on the print platform, after the solidification finishes printing platform descends the distance of a printing layer thickness, the scraper resets, to this moment, the printing process on a printing layer finishes, repeat above-mentioned printing process after that, the successive layer is printed to the shaping and is gone out complete part.
The additive manufacturing apparatus adopting a multi-molding coupling manner in this embodiment is the same as that in the first embodiment.
EXAMPLE III
A multi-forming mode coupled additive manufacturing method adopts multi-forming mode coupled additive manufacturing equipment to realize single material printing, and the printing process is as follows:
firstly, filling one main printing material in a storage space enclosed by a feeding cavity and a feeding piston, and then filling the other printing material in a needle cylinder; secondly, filling water into the water storage tank, starting the peristaltic pump to enable the water to circularly flow in the heat preservation system, setting the constant temperature of the heating rod to be a specified temperature, and starting the heating rod to heat the water; then, importing the slice file of the part to be printed into the upper computer software of the printing equipment; arranging the positions of the parts to be printed in the upper computer software according to the actual conditions such as the number, the size and the like of the parts to be printed, and setting the forming parameters such as the printing layer thickness, the laser speed and the like; and then observing whether the temperature displayed on the temperature detector reaches the specified temperature or not, and starting printing after the temperature reaches the specified temperature.
The second lift platform drives print platform and descends the distance of a print layer thickness, the printing process begins, first lift platform receives control signal, drive feed piston upward movement, with printing material propelling movement to the recess in, the feed process finishes and the material covers the process and begins, scraper moving platform drives the scraper with the constant speed and removes to the shaping chamber direction under the direction of scraper moving guide rail and makes the printing material evenly cover and cover at print platform upper surface, the process that covers is accomplished after the scraper moves the assigned position, then the solidification light source carries out the face exposure solidification to the printing material on print platform according to the file data of cutting into slices, the distance of a print layer thickness that print platform descends after the solidification is accomplished, the scraper resets, to this point, the printing process on a print layer ends, repeat above-mentioned print process after that, the successive layer is printed to shaping out complete part.
The additive manufacturing apparatus adopting a multi-molding coupling manner in this embodiment is the same as that in the first embodiment.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (9)
1. A multi-forming mode coupled additive manufacturing method is characterized in that: the additive manufacturing equipment coupled by adopting a multi-forming mode comprises a rack, a feeding forming module, a photocuring module, a scraper module, a material extruding module and a heat preservation module for preserving heat of a printing material;
the material extrusion module comprises a moving mechanism and an extrusion assembly for extruding printing materials, the moving mechanism is arranged on the rack, and the moving mechanism is connected with the extrusion assembly and drives the extrusion assembly to move;
the feeding forming module comprises a forming piston and a feeding piston, a groove is formed in the rack, the heat preservation module comprises a heat preservation cylinder, a forming cavity and a feeding cavity are formed in the heat preservation cylinder, the forming cavity and the feeding cavity are both communicated with the bottom of the groove, the forming piston is slidably embedded into the forming cavity, and the feeding piston is slidably embedded into the feeding cavity;
the scraper module comprises a scraper moving platform and a scraper for spreading printing materials, the scraper moving platform is installed on the rack, and the scraper moving platform is connected with the scraper and drives the scraper to move;
the light curing module is arranged on the rack and comprises a curing light source;
the heat preservation module further comprises a water pump, a water storage tank, a heating element and a temperature detection element, wherein a heat preservation flow channel is formed in the heat preservation cylinder, the heating element and the temperature detection element are both arranged in the water storage tank, the water storage tank comprises a water tank inlet and a water tank outlet, the heat preservation flow channel comprises a flow channel inlet and a flow channel outlet, the water tank outlet is communicated with the flow channel inlet through the water pump, and the water tank inlet is communicated with the flow channel outlet;
a multi-forming mode coupling additive manufacturing method comprises the following steps:
s1, filling printing materials;
s2, starting the water pump, and setting the heating temperature of the heating element;
s3, observing the temperature detected by the temperature detecting element, and starting printing after reaching the set temperature;
s4, controlling the forming piston to descend by the thickness of one printing layer;
s5, if the current printing layer needs multi-material printing or multi-material variable-concentration printing, calculating a material extrusion path, controlling a moving mechanism to drive an extrusion assembly to move above a molding cavity, extruding the printing material in the extrusion assembly along the material extrusion path, and then controlling a curing light source to cure the extruded printing material; if the current printing layer does not need multi-material printing or multi-material variable-density printing, skipping the step;
s6, controlling the feeding piston to move upwards to push the required printing material into the groove;
s7, the scraper moving platform controls the scraper to move, and the printing material in the groove is paved on the forming cavity;
s8, controlling a curing light source to selectively cure the paved printing material;
s9, controlling the forming piston to descend by the thickness of one printing layer;
s10, resetting the scraper;
s11, repeating the steps S5-S10 until the printing is finished.
2. A multi-form coupled additive manufacturing method according to claim 1, wherein: the position of the water tank inlet is lower than that of the water tank outlet, and the position of the flow passage inlet is higher than that of the flow passage outlet.
3. A multi-form coupled additive manufacturing method according to claim 2, wherein: the moving mechanism comprises an X-axis moving platform for driving the extrusion assembly to translate along an X axis, a Y-axis moving platform for driving the extrusion assembly to translate along a Y axis, and a Z-axis moving platform for driving the extrusion assembly to translate along a Z axis;
the direction of the X axis is horizontal, the direction of the Y axis is horizontal and vertical to the X axis, and the direction of the Z axis is vertical.
4. A multi-form coupled additive manufacturing method according to claim 2, wherein: the extrusion assembly comprises a needle cylinder, a needle cylinder mounting plate, a pressing rod, a discharging motor and a screw rod, the needle cylinder is fixedly connected with the needle cylinder mounting plate, a needle head of the needle cylinder faces downwards, and the pressing rod is slidably embedded into the needle cylinder;
the discharge motor is arranged on the needle cylinder mounting plate and is connected with the pressure rod through a screw rod and drives the pressure rod to slide in the needle cylinder.
5. A multi-form coupled additive manufacturing method according to claim 3, wherein: the moving mechanism also comprises an X-axis mounting plate and a Z-axis mounting plate;
the Y-axis moving platform is installed on the rack, the X-axis moving platform is connected with the Y-axis moving platform through the X-axis installation plate, the X-axis moving platform is driven by the Y-axis moving platform to translate along the Y axis, the Z-axis moving platform is connected with the X-axis moving platform through the Z-axis installation plate, the Z-axis moving platform is driven by the X-axis moving platform to translate along the X axis, and the Z-axis moving platform is connected with the extrusion assembly and drives the extrusion assembly to translate along the Z axis.
6. A multi-form coupled additive manufacturing method according to claim 2, wherein: the frame comprises a first mounting plate, a second mounting plate and a frame, the first mounting plate is horizontally arranged and fixedly connected with the frame, the groove is formed in the first mounting plate, the opening of the groove is upward, and the forming cavity and the feeding cavity are both positioned below the groove;
the second mounting plate is fixedly connected with the framework and is positioned below the first mounting plate, the first mounting plate is parallel to the second mounting plate, and the water storage tank and the water pump are both mounted on the second mounting plate;
a plurality of upright posts are arranged between the first mounting plate and the second mounting plate.
7. A multi-form coupled additive manufacturing method according to claim 2, wherein: the forming and feeding module further comprises a first lifting platform and a second lifting platform, the first lifting platform and the second lifting platform are both mounted on the frame, the first lifting platform is connected with the feeding piston and drives the feeding piston to lift, the second lifting platform is connected with the forming piston and drives the forming piston to lift, and the printing platform is mounted on the forming piston.
8. A multi-form coupled additive manufacturing method according to claim 2, wherein: the molding cavity and the feeding cavity are both of columnar structures, the heat-insulation flow channel surrounds the outer sides of the molding cavity and the feeding cavity, the center lines of the molding cavity and the feeding cavity are vertical, and the projection of the heat-insulation flow channel on the horizontal plane is in a shape like a Chinese character '8'.
9. A multi-form coupled additive manufacturing method according to claim 1, wherein: in step S5, if the current print layer needs multi-material variable density printing, the minimum resolution of the material extrusion module is taken as one micro-unit, the current print layer is uniformly divided into a plurality of material units, each material unit is divided into a plurality of micro-units, the proportion of the print material to the micro-units is calculated according to the required density in each material unit, and the material extrusion path is calculated according to the proportion of the print material to the micro-units in each material unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110613888.6A CN113459509B (en) | 2021-06-02 | 2021-06-02 | Additive manufacturing equipment and method with multiple coupled forming modes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110613888.6A CN113459509B (en) | 2021-06-02 | 2021-06-02 | Additive manufacturing equipment and method with multiple coupled forming modes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113459509A CN113459509A (en) | 2021-10-01 |
| CN113459509B true CN113459509B (en) | 2022-08-12 |
Family
ID=77872043
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110613888.6A Active CN113459509B (en) | 2021-06-02 | 2021-06-02 | Additive manufacturing equipment and method with multiple coupled forming modes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113459509B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116653285B (en) * | 2023-07-26 | 2023-11-07 | 中南大学 | Multi-material additive manufacturing device and method for regulating rheological property of photosensitive slurry |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BR112017006487A2 (en) * | 2014-09-30 | 2018-07-03 | Hewlett Packard Development Co | generation of a three dimensional object |
| EP3408046A4 (en) * | 2016-01-29 | 2019-10-16 | Hewlett-Packard Development Company, L.P. | Three-dimensional (3d) printing |
| CN105963049B (en) * | 2016-04-20 | 2017-07-28 | 清华大学深圳研究生院 | Extrusion system can be printed with the intelligent biological of real time stepless gearshift adjustment extrusion capacity |
| EP3455054B1 (en) * | 2016-05-12 | 2023-03-29 | Hewlett-Packard Development Company, L.P. | Three-dimensional printing method |
| CN110039773B (en) * | 2019-05-08 | 2020-07-28 | 清华大学 | Three-dimensional printer with composite process and printing method thereof |
-
2021
- 2021-06-02 CN CN202110613888.6A patent/CN113459509B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN113459509A (en) | 2021-10-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8033811B2 (en) | Pantograph assembly for digital manufacturing system | |
| KR101691052B1 (en) | Additive manufacturing system with extended printing volume, and methods of use thereof | |
| US6253116B1 (en) | Method and apparatus for rapid freezing prototyping | |
| KR20160132498A (en) | Device for constructing models in layers | |
| CN106626358B (en) | A kind of more material 3D printers and liquid object accumulate 3D printing method | |
| CN113459509B (en) | Additive manufacturing equipment and method with multiple coupled forming modes | |
| JP7193548B2 (en) | Additive Manufacturing Apparatus, System, and Method | |
| CN203401819U (en) | 3D printing molding system | |
| CN1974185A (en) | Improved rapid prototyping and manufacturing system and method | |
| CN108971482B (en) | Planar array type magnetic control additive manufacturing method | |
| CN101024307A (en) | Resin liquid-level control for photo-solidification quick formation and resin coating method and apparatus | |
| CN103815992B (en) | A kind of 3D printing equipment of multiple branch circuit three-dimensional biological structure and Method of printing | |
| US11312078B2 (en) | Waste disposal for additive manufacture | |
| US20190351609A1 (en) | Supportless photoresin 3d printer | |
| US20180290398A1 (en) | Additive manufacturing system with a channeled starter piece and method of printing a 3d part utilizing the starter piece | |
| CN109846122A (en) | A kind of wig glue spreader | |
| CN113290846B (en) | DLP and FDM-based composite multi-material additive manufacturing device and method | |
| CN204914579U (en) | Catalytic curing type 3D printer | |
| KR102288941B1 (en) | stereo lithography 3D printer by using multi-resin coated film | |
| CN105014972A (en) | Catalytic curing type 3D printing technology and printer | |
| CN201070836Y (en) | Resin heating system for photo-curing rapid-shaping | |
| CN114013034B (en) | Adhesive injection molding all-in-one machine based on wood fiber biomass material | |
| CN214605914U (en) | Powder supply mechanism used in selective laser sintering forming device | |
| CN215589947U (en) | Multi-material 3D printer based on jet bonding technology | |
| CN115195113A (en) | Double-extrusion-head direct-writing type 3D printing device and printing method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |