CN112248437B - Silicone rubber liquid 3D printing feeding and extruding device and 3D printing equipment - Google Patents
Silicone rubber liquid 3D printing feeding and extruding device and 3D printing equipment Download PDFInfo
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- CN112248437B CN112248437B CN202010908818.9A CN202010908818A CN112248437B CN 112248437 B CN112248437 B CN 112248437B CN 202010908818 A CN202010908818 A CN 202010908818A CN 112248437 B CN112248437 B CN 112248437B
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- 229920002379 silicone rubber Polymers 0.000 title claims abstract description 45
- 238000010146 3D printing Methods 0.000 title claims abstract description 40
- 239000004945 silicone rubber Substances 0.000 title claims abstract description 37
- 239000007788 liquid Substances 0.000 title claims abstract description 24
- 238000003860 storage Methods 0.000 claims abstract description 20
- 238000007599 discharging Methods 0.000 claims abstract description 5
- 238000002156 mixing Methods 0.000 claims description 48
- 239000000463 material Substances 0.000 claims description 20
- 239000000839 emulsion Substances 0.000 claims description 16
- 238000010438 heat treatment Methods 0.000 claims description 16
- 239000004065 semiconductor Substances 0.000 claims description 16
- 238000003756 stirring Methods 0.000 claims description 13
- 230000009467 reduction Effects 0.000 claims description 12
- 238000009529 body temperature measurement Methods 0.000 claims description 5
- 230000006870 function Effects 0.000 claims description 5
- 238000005259 measurement Methods 0.000 claims description 5
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- 230000009471 action Effects 0.000 description 2
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- 239000003292 glue Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000004073 vulcanization Methods 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
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- 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
- B29C64/209—Heads; Nozzles
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- 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
- B29C64/30—Auxiliary operations or equipment
- B29C64/386—Data acquisition or data processing for additive manufacturing
- B29C64/393—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
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- 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
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Optics & Photonics (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The invention discloses a silicone rubber liquid 3D printing feeding and extruding device and 3D printing equipment, which comprise a power system and a feeding system, wherein the power system comprises: step motor, the ball is vice, fixed clamp, a piston, a supporting plate, the support column, the bottom fixing plate, nozzle and mixed jar, mixed jar and backup pad fixed connection, support column one end is passed the backup pad and is connected with the bottom fixing plate, the support column other end and fixed clamp fixed connection, the fixed clamp dress presss from both sides on step motor's outer wall, step motor drive ball is linear motion, ball's tip and piston fixed connection, piston slidable ground imbeds in the mixed jar, feeding system is including setting up ejection of compact check valve and at least one feed unit on the nozzle, arbitrary feed unit is in proper order with the flowmeter, the feed check valve, the order of storage vat is connected with the feed inlet of mixed jar. The stepping motor and the ball screw are used as a propelling mechanism, so that the defect of inaccurate pneumatic driving discharging is avoided.
Description
Technical Field
The invention relates to a silicone rubber liquid 3D printing feeding and extruding device and 3D printing equipment, and belongs to the field of silicone rubber 3D printing forming.
Background
The silicon rubber is the largest rubber in the aviation sealing products, and has important application value in the aviation sealing piece manufacturing industry because of excellent elasticity, high and low temperature resistance, corrosion resistance and good weather resistance. However, the silicone rubber molding process is single, the structure with a single section can be formed by extrusion, and the complicated structure needs to be formed by compression molding. The traditional compression molding has the defects of long mold manufacturing period, high mold price, complex mold, low automation degree of the process flow and the like, and the 3D printing molding mode can overcome the adverse factors in the traditional compression molding and realize the flexible and automatic molding of the silicon rubber structural part.
In 3D printing of silicone rubber liquids, difficulties are mainly concentrated on:
1. precise ratio of multiple components.
2. And (4) automatically conveying materials.
3. And (3) monitoring and controlling the viscosity of the silicone rubber emulsion on line.
4. And monitoring and controlling the temperature of the silicone rubber emulsion.
5. Precision extrusion of silicone rubber emulsions.
The viscosity of the silicone rubber emulsion is a key parameter of liquid direct-writing 3D printing, and the forming quality is determined. Therefore, the viscosity adjustment of the silicone rubber emulsion is the key point of 3D printing and forming of the silicone rubber and is also a difficult point. The additive components and concentrations determine the viscosity of the silicone rubber emulsion in the initial state, and the vulcanization rate of the silicone rubber emulsion determines the law of the viscosity change with time. The vulcanization rate of the silicone rubber emulsion is comprehensively influenced by a plurality of factors such as additive components and concentrations, vulcanizing agent concentrations, temperature, pressure, shear rate and the like, and the influence degrees of the factors are nonlinear. Especially the temperature and shear rate have the greatest effect on viscosity.
In summary, the following limitations or problems exist in the current 3D printing and forming technology for silicone rubber:
1. only the shear thinning effect of the silicone rubber emulsion is considered by using screw shearing, and the dynamic influence of temperature on viscosity is not considered.
2. The patent of realizing the 3D printing and extruding mechanism of the silicon rubber adopts pneumatic and screw shearing, the manufacturing cost and the mechanical complexity are improved, and the high-pressure air source has certain danger.
3. There is no on-line viscosity monitoring and adjustment and there is no control over the molding process.
4. The multi-component high-flux preparation function is not realized.
Disclosure of Invention
In order to solve the above problems, the invention provides a silicone rubber liquid 3D printing feeding and extruding device, which comprises a power system and a feeding system, wherein,
the power system comprises: a stepping motor, a ball screw pair, a fixed clamp, a piston, a supporting plate, a supporting column, a bottom fixing plate, a nozzle and a temperature-controllable mixing cylinder,
the bottom fixing plate is connected with the 3D printing platform machine head, so that the nozzle penetrates through the 3D printing platform machine head, the temperature-controllable mixing cylinder is fixedly connected with the supporting plate, one ends of a plurality of supporting columns penetrate through the supporting plate to be connected with the bottom fixing plate, the other ends of the plurality of supporting columns are fixedly connected with the fixing clamp, the temperature-controllable mixing cylinder is fixed on the supporting columns through the supporting plate, the fixing clamp is clamped on the outer wall of the stepping motor, the stepping motor outputs motion to the ball screw pair to drive the ball screw to do linear motion, the end part of the ball screw is fixedly connected with the piston, and the piston is slidably embedded into the temperature-controllable mixing cylinder,
the feeding system comprises a discharge one-way valve and at least one feeding unit which are arranged on the nozzle, wherein any feeding unit comprises a storage barrel, a feeding one-way valve and a flowmeter, and any feeding unit is connected with a feeding hole of the temperature-controllable mixing cylinder in sequence through the flowmeter, the feeding one-way valve and the storage barrel.
Preferably, still include control system, control system includes host computer and the control panel of electricity connection, the control panel is connected and ejection of compact check valve, each feed check valve, each flowmeter electricity with step motor's driver electricity, the host computer sends control command, conveys to the control panel through serial ports communication, and the control panel sends control pulse drive step motor to the step motor driver and drives piston work to, the control panel sends control command to feed check valve, ejection of compact check valve, cooperates step motor to accomplish the function of extruding and feeding.
Preferably, still include electromagnetic stirring system, electromagnetic stirring system includes cavity rotation step motor and magnetic stirrers, and cavity rotation step motor cover is outside the controllable type mixing tank of temperature, and the permanent magnet is fixed in cavity rotation step motor inboard, and the magnetic stirrers is placed in the controllable type mixing tank of temperature, and cavity rotation step motor is connected with the control panel electricity, and the magnetic stirrers mixes the stirring to silicon rubber emulsion in the controllable type mixing tank of temperature under the drive of the rotating magnetic field that cavity rotation step motor and permanent magnet formed.
Preferably, the temperature measurement feedback system comprises a temperature sensor, a heating wire and a semiconductor refrigerating piece, the heating wire is wound on the outer wall of the temperature-controllable mixing cylinder, the semiconductor refrigerating piece is sleeved on the outer wall of the temperature-controllable mixing cylinder, the heating wire and the semiconductor refrigerating piece are respectively electrically connected with the control board, and the control board adjusts the heating wire or the semiconductor refrigerating piece to work in real time according to the obtained feedback temperature.
Preferably, the viscosity measurement feedback system comprises a torque sensor arranged in the hollow rotary stepping motor, the torque sensor is electrically connected with the control board, and the control board adjusts the rotary magnetic field intensity of the hollow rotary stepping motor and controls the heating wire or the semiconductor refrigerating sheet to work in real time according to the obtained feedback viscosity.
Preferably, the ball screw pair comprises a ball screw and a nut matched with the ball screw, and when the piston is withdrawn, the part of the ball screw except the piston is completely retracted into the nut matched with the piston.
Preferably, the fixed clamp is provided with a radial tightening adjusting bolt, and the position of the fixed clamp clamped on the stepping motor is adjusted through the tightening adjusting bolt.
Preferably, the stepping motor further comprises a reduction gearbox, and the stepping motor outputs motion to the ball screw pair through the reduction gearbox.
The invention also provides 3D printing equipment which comprises a printing platform machine head and the 3D printing feeding and extruding device for the silicon rubber liquid, wherein the bottom fixing plate is connected with the 3D printing platform machine head, so that a nozzle penetrates through the 3D printing platform machine head.
Compared with the existing silicone rubber liquid direct-writing 3D printing feeding and extruding device, the device has the following advantages and outstanding effects:
(1) the power part of the invention is accurately controlled, and the stepping motor and the ball screw are used as the propelling mechanism, so the structure form is simple. The stepping motor is used as power, so that the defect of inaccurate pneumatic driving discharging is avoided. The mixing cylinder can be conveniently replaced, and has strong maintainability and use flexibility;
(2) the programmable electromagnetic one-way valve and the flowmeter are used for realizing the programmable high-flux mixing of multiple components of the silicone rubber emulsion, and the method is simple and efficient;
(3) the cold and hot two-way active control of the silicone rubber emulsion is achieved by matching and using the semiconductor refrigerating sheet and the heating wire in a mixed manner, and the temperature control is accurate;
(4) the hollow rotary stepping motor and the magnetic stirrer act together, the magnetic stirrer is regular in appearance and easy to take out, the residual glue is easier to clean compared with a mixing cylinder for stirring by a screw rod, and meanwhile, the glue viscosity information is fed back to the control panel by utilizing the torque sensor, so that a closed loop for controlling the stirring speed is formed.
Drawings
The above features and technical advantages of the present invention will become more apparent and readily appreciated from the following description of the embodiments thereof taken in conjunction with the accompanying drawings.
FIG. 1 is a schematic diagram of a silicone rubber liquid 3D printing feeding and extruding device;
FIG. 2 is a schematic diagram of a silicone rubber liquid 3D printing feeding and extruding device;
fig. 3 is an enlarged view of a portion a in fig. 2.
In the figure: 1-a step motor; 2-a reduction gearbox; 3-ball screw; 4, fixing a clamp; 5-a piston; 6-tightening the adjusting bolt; 7-a support plate; 8-A series storage barrels; 9-B series storage barrels; 10-A port flowmeter; 11-port B flow meter; a 12-A series check valve; 13-B series check valves; 14-A feed port; 15-B feed port; 16-a support column; a 17-A series material pipe; 18-B series material pipes; 19-a one-way valve; 20-bottom fixation plate; 21-3D printing platform head; 22-a nozzle; 23-temperature controllable mixing cylinder; 24-hollow rotating stepper motor; 25-magnetic stirrer; 26-permanent magnet.
Detailed Description
Embodiments of the high-temperature vulcanized silicone rubber 3D liquid direct-write printing feeding and extruding device according to the present invention will be described below with reference to the accompanying drawings. Those of ordinary skill in the art will recognize that the described embodiments can be modified in various different ways, or combinations thereof, without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims. Furthermore, in the present description, the drawings are not to scale and like reference numerals refer to like parts.
Fig. 1 is a schematic flow chart of a silicone rubber liquid 3D printing feeding and extruding operation, fig. 2 is a schematic structural diagram of a silicone rubber liquid 3D printing feeding and extruding device, and fig. 3 is an enlarged view of a portion a in fig. 2. The apparatus is described below with reference to fig. 1, 2 and 3.
The device comprises a control system, a power system, a feeding system, an electromagnetic stirring system, a viscosity measurement feedback system and a temperature measurement feedback system. The power system comprises: the device comprises a stepping motor 1, a reduction gearbox 2, a ball screw pair, a fixing clamp 4, a piston 5, a tightening adjusting bolt 6, a supporting plate 7, a supporting column 16, a bottom fixing plate 20, a nozzle 22 and a temperature-controllable mixing cylinder 23. The bottom fixing plate 20 is connected to the 3D printing platform head such that the nozzle 22 passes through the 3D printing platform head 21. The stepping motor 1 is connected with the reduction gearbox, the control panel is electrically connected with a driver of the stepping motor 1 to control the stepping motor 1 to operate, the stepping motor 1 drives the reduction gearbox 2 to output motion to the ball screw pair, the ball screw pair is formed by matching a ball screw and a nut, the reduction gearbox 2 outputs motion to the nut of the ball screw pair, and the ball screw is driven to do linear motion by the rotation motion of the nut. The piston 5 is embedded in the temperature-controllable mixing cylinder 23 and is in sliding fit with the temperature-controllable mixing cylinder 23. The end of the ball screw 3 is fixedly connected with the piston 5, so that the piston 5 is driven to make relative linear motion with respect to the temperature-controllable mixing cylinder 23. As shown in fig. 2, when the piston 5 is pushed to move downwards, the silicone rubber is extruded from the nozzle 22 for forming and printing, and when the piston 5 is pulled to be drawn back upwards, the material is sucked into the temperature-controllable mixing cylinder 23. Preferably, the ball screw part except the piston 5 can be completely retracted into the nut matched with the ball screw part when the piston is withdrawn, so that the volume of the device can be reduced.
The cylinder body of the temperature-controllable mixing cylinder 23 is fixedly connected to the supporting plate 7, and one ends of the supporting pillars 16 penetrate through the supporting plate 7 to be connected to the bottom fixing plate 20, so that the temperature-controllable mixing cylinder 23 can be supported. An annular shoulder for supporting the support plate 7 may be formed on the support column 16. The fixed hoop 4 is clamped on the outer wall of the reduction gearbox 2, the other end of the support column 16 is fixedly connected with the fixed hoop 4, and as shown in figure 2, the other end of the support column 16 penetrates through the fixed hoop 4 and is fastened by a bolt. And the stepping motor 1 and the reduction gearbox 2 can be supported by fastening the adjusting bolts 6. Can tightly decide adjusting bolt 6 and adjust step motor 1 position through the position of the fixed clamp 4 of transform, be applicable to the mixed jar of different volumes, under the prerequisite that supports firmly, compact structure. It should be noted that the ball screw pair may be directly driven by the stepping motor 1 without using the reduction gear box 2.
The feeding system comprises a discharge one-way valve and at least one feeding unit which are arranged on the nozzle 22, wherein any feeding unit comprises a storage barrel, a feeding one-way valve and a flowmeter, and any feeding unit is connected with a feeding hole of the temperature-controllable mixing cylinder in sequence of the flowmeter, the feeding one-way valve and the storage barrel. The following description will be given by taking two sets of supply units of the A series and the B series as examples.
The device comprises an A series storage barrel 8, a B series storage barrel 9, an A port flowmeter 10, a B port flowmeter 11, an A series check valve 12, a B series check valve 13, an A feed port 14, a B feed port 15, an A series material pipe 17, a B series material pipe 18 and a nozzle check valve 19. The multi-component silicon rubber and various additives are stored in the A series storage barrel 8 and the B series storage barrel 9, and liquid materials with corresponding volume fractions can be accurately controlled through a program and enter the temperature-controllable mixing cylinder 23. An a-series check valve 12 is arranged between the a-series storage vat 8 and the a-series material tube 17, only the a-series storage vat 8 is shown in fig. 2, of course, a plurality of a-series storage vats 8 are also possible, an a-series check valve 12 is installed between each a-series storage vat 8 and the a-series material tube 17, an a-port flowmeter 10 is further installed at the a-port 14, and a material enters the a-series material tube 17 from the a-series storage vat 8 through the a-series check valve 12 and enters the a-port flowmeter 10 and then enters the temperature-controllable mixing cylinder 23. Similarly, a B-series check valve 13 is arranged between the B-series storage barrel 9 and the B-series material pipe 18, a B-port flowmeter 11 is arranged at the B-feed port 15, and the material enters the B-series material pipe 18 from the B-series storage barrel 9 through the B-series check valve 13 and enters the A-feed port 14 after passing through the B-port flowmeter 11, so as to enter the temperature-controllable mixing cylinder 23. The above a series and B series are merely illustrative, and the present embodiment does not exclude that other series may also be present.
When the piston 5 is driven by the ball screw to be drawn back for feeding, the nozzle check valve 19 is closed, a certain negative pressure is generated in the temperature-controllable mixing cylinder 23, the check valve of the corresponding material is opened under the control of the control panel, and under the action of the negative pressure in the temperature-controllable mixing cylinder 23, the silica gel raw material sequentially enters the temperature-controllable mixing cylinder 23 from the A-series check valve 12 and the B-series check valve 13 through the A-series material pipe 17, the B-series material pipe 18, the A-port flowmeter 10, the B-port flowmeter 11, the A feed port 14 and the B feed port 15.
The electromagnetic stirring comprises a hollow rotating stepping motor 24, a magnetic stirrer 25 and a permanent magnet 26, the hollow rotating stepping motor 24 is sleeved outside the temperature-controllable mixing cylinder 23, the magnetic stirrer 25 is placed in the temperature-controllable mixing cylinder 23, the permanent magnet 26 is fixed on the inner side of the hollow rotating stepping motor 24, and the magnetic stirrer 25 can be in an ellipsoid shape. The magnetic stirrer 25 is driven by a rotating magnetic field formed by the hollow rotating stepping motor 24 and the permanent magnet 26 to rotate in the temperature-controllable mixing cylinder 23, so that the silicone rubber emulsion is subjected to mixing and stirring and shear thinning treatment, and the advantages of non-contact are achieved.
The viscosity measurement feedback system monitors the viscosity of the silicone rubber emulsion in the cylinder by measuring the received resistance torque of the magnetic stirrer 25 through a torque sensor arranged in the hollow rotating stepping motor 24, has the characteristic of real-time online viscosity monitoring, and adjusts the viscosity in the mixing cylinder by utilizing the shearing action of stirring and a temperature control module of the mixing cylinder. The measurement principle of the device is similar to that of a stirring viscometer, when the magnetic stirrer 25 stably rotates in liquid, the resistance torque borne by the magnetic stirrer is equal to the driving torque of the hollow rotating stepping motor 24, and is a function of the rotating speed and the viscosity of the liquid, and the relationship between the viscosity and the driving torque at different speeds can be obtained by calibrating the liquid with standard viscosity.
The temperature measurement feedback system also comprises a temperature sensor, an electric heating wire and a semiconductor refrigerating sheet. Temperature sensor is fixed in the inboard bottom of the controllable type mixing cylinder 23 of temperature, can adopt SMD temperature sensor, can feed back the temperature that detects to the control panel in real time, has the heating wire at the outer wall winding of the controllable type mixing cylinder 23 of temperature to the cover is equipped with the semiconductor refrigeration piece, and heating wire and semiconductor refrigeration piece all are connected with the control panel electricity respectively, and the control panel adjusts heating wire or semiconductor refrigeration piece work in real time according to the feedback temperature who obtains, the heating is accomplished to the heating wire, and the cooling is accomplished to annular semiconductor refrigeration piece to can adjust the temperature of the material in the controllable type mixing cylinder 23 of temperature. Has the characteristics of quick temperature response, flexible control and small volume.
The control system comprises an upper computer and a control panel which are electrically connected, wherein the control panel is electrically connected with the stepping motor driver and is electrically connected with each one-way valve and each flowmeter. The upper computer sends out control command, conveys to the control panel through serial port communication, and the control panel sends control pulse drive step motor to step motor driver and drives piston 5 work. Meanwhile, the control panel sends control commands to the programmable A series check valve 12, the programmable B series check valve 13 and the programmable nozzle check valve 19, and the control panel is matched with a stepping motor to complete the functions of extruding and withdrawing materials. The control board carries out closed-loop control according to preset temperature and viscosity according to temperature and viscosity information fed back by the online monitoring sensors in the temperature-controllable mixing cylinder 23 and the hollow rotary stepping motor 24.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A silicone rubber liquid 3D printing feeding and extruding device is characterized by comprising a power system and a feeding system, wherein,
the power system comprises: a stepping motor (1), a ball screw pair, a fixed clamp (4), a piston (5), a support plate (7), a support column (16), a bottom fixed plate (20), a nozzle (22) and a temperature-controllable mixing cylinder (23),
the temperature-controllable mixing cylinder is fixedly connected with the supporting plate, one end of each supporting column penetrates through the supporting plate to be connected with the bottom fixing plate, the other end of each supporting column is fixedly connected with the fixing clamp, the temperature-controllable mixing cylinder is fixed on the supporting columns through the supporting plate, the fixing clamp is clamped on the outer wall of the stepping motor, the stepping motor outputs motion to the ball screw pair to drive the ball screw to do linear motion, the end part of the ball screw is fixedly connected with the piston, and the piston is slidably embedded into the temperature-controllable mixing cylinder,
the feeding system comprises a discharging one-way valve and at least one feeding unit which are arranged on a nozzle, wherein any feeding unit comprises a material storage barrel, a feeding one-way valve and a flow meter, any feeding unit is sequentially connected with a feeding hole of the temperature-controllable mixing cylinder in the sequence of the flow meter, the feeding one-way valve and the material storage barrel,
the silicon rubber emulsion mixer is characterized by further comprising an electromagnetic stirring system, wherein the electromagnetic stirring system comprises a hollow rotary stepping motor and a magnetic stirrer, the hollow rotary stepping motor is sleeved outside the temperature-controllable mixing cylinder, the permanent magnet is fixed on the inner side of the hollow rotary stepping motor, the magnetic stirrer is placed in the temperature-controllable mixing cylinder, the hollow rotary stepping motor is electrically connected with the control panel, and the magnetic stirrer is driven by a rotary magnetic field formed by the hollow rotary stepping motor and the permanent magnet to mix and stir the silicon rubber emulsion in the temperature-controllable mixing cylinder;
the viscosity measurement feedback system comprises a torque sensor arranged in the hollow rotary stepping motor, the torque sensor is electrically connected with the control panel, and the control panel adjusts the rotary magnetic field intensity of the hollow rotary stepping motor and controls the heating wire or the semiconductor refrigerating sheet to work in real time according to the obtained feedback viscosity.
2. The silicone rubber liquid 3D printing feeding and extruding device as claimed in claim 1, further comprising a control system, wherein the control system comprises an upper computer and a control panel which are electrically connected, the control panel is electrically connected with a driver of the stepping motor, the discharging one-way valve, the feeding one-way valves and the flowmeters, the upper computer sends a control instruction, the control instruction is transmitted to the control panel through serial port communication, the control panel sends a control pulse to the driver of the stepping motor to drive the piston to work, and the control panel sends a control instruction to the feeding one-way valve and the discharging one-way valve to complete extruding and feeding functions by matching with the stepping motor.
3. The silicone rubber liquid 3D printing feeding and extruding device as claimed in claim 1, further comprising a temperature measurement feedback system, wherein the temperature measurement feedback system comprises a temperature sensor, a heating wire and a semiconductor refrigerating piece, the heating wire is wound on the outer wall of the temperature-controllable mixing cylinder, the semiconductor refrigerating piece is sleeved on the outer wall of the temperature-controllable mixing cylinder, the heating wire and the semiconductor refrigerating piece are respectively electrically connected with the control board, and the control board adjusts the heating wire or the semiconductor refrigerating piece to work in real time according to the obtained feedback temperature.
4. The silicone rubber liquid 3D printing feed and extrusion device of claim 1, wherein the ball screw pair comprises a ball screw and a nut engaged therewith, and the ball screw portion other than the piston is retracted fully back into the nut engaged therewith when the piston is retracted.
5. The silicone rubber liquid 3D printing, feeding and extruding device as claimed in claim 1, wherein the fixing clamp is provided with radial tightening adjusting bolts, and the position of the fixing clamp clamped on the stepping motor is adjusted through the tightening adjusting bolts.
6. The silicone rubber liquid 3D printing, feeding and extruding device according to claim 1, further comprising a reduction gearbox, wherein the stepper motor outputs motion to the ball screw pair through the reduction gearbox.
7. 3D printing equipment, comprising a printing platform head, characterized by further comprising the silicone rubber liquid 3D printing feeding and extruding device of any one of claims 1 to 6, wherein the bottom fixing plate (20) is connected with the 3D printing platform head so that a nozzle passes through the 3D printing platform head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010908818.9A CN112248437B (en) | 2020-09-02 | 2020-09-02 | Silicone rubber liquid 3D printing feeding and extruding device and 3D printing equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010908818.9A CN112248437B (en) | 2020-09-02 | 2020-09-02 | Silicone rubber liquid 3D printing feeding and extruding device and 3D printing equipment |
Publications (2)
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