CN102688829A - Resin coating device and method for manufacturing photo-cure quick prototype - Google Patents
Resin coating device and method for manufacturing photo-cure quick prototype Download PDFInfo
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- CN102688829A CN102688829A CN201210145043XA CN201210145043A CN102688829A CN 102688829 A CN102688829 A CN 102688829A CN 201210145043X A CN201210145043X A CN 201210145043XA CN 201210145043 A CN201210145043 A CN 201210145043A CN 102688829 A CN102688829 A CN 102688829A
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Abstract
The invention relates to the technical field of manufacture of quick prototypes, and discloses a resin coating device for a photo-cure quick prototype. The resin coating device comprises a main cylinder, a piston type worktable, a storage tank, a pump, a computer and a movable spraying device, the movable spraying device consists of a sprayer, a scraper and a driving mechanism for driving the sprayer and the scraper to move synchronously, the sprayer and the scraper are positioned above the piston type worktable, a holding cavity is formed between the upper surface of the piston type worktable and the inner surface of the main cylinder, and the pump is used for spraying resin in the storage tank into the holding cavity via the sprayer. The resin coating device for manufacturing the photo-cure quick prototype and a method for manufacturing the quick prototype have the advantages that large-area thin resin coatings can be uniformly and flatly coated effectively by a simple structure, resin utilization rate is high, and products with high quality and large cross sections can be quickly manufactured in a material-saving manner.
Description
Technical field
The present invention relates to the light-cured rapid prototype manufacturing with resin coating apparatus and fast prototype making process, belong to the RP technique field.
Background technology
RP technique is a kind of based on the discrete formula that the adds up forming technique of piling up principle.It is by modern means such as computer, laser, precision drive and numerical controls; CAD (CAD) and computer-aided manufacturing (CAM) are integrated in one; According to the threedimensional model of constructing on computers, model or sample can directly manufacture a product in very short time.
The light-cured rapid prototype manufacturing process is raw material with the photosensitive resin; With the three-dimensional part model that designs on the computer, surface triangulation is handled, and is stored as the stl file form; It is carried out layering handles; Obtain the two-dimensional silhouette information of each layer cross section, generate the scanning solidification path automatically, make its coagulation forming successively through the computer control Ultra-Violet Laser according to these profile informations.After one deck curing finishes; Workbench moves down the distance of a bed thickness; So that apply the new liquid photosensitive resin of last layer again at the resin surface that originally was cured, the resin liquid level that scraper is bigger with viscosity is wipeed off, and work is solidified in the scanning of carrying out the coating of new one deck then; So repeat, finish until whole product manufacturing.
Present resinous coat method has two kinds, and a kind of is the negative-pressure adsorption-type coating process.The process that this method is carried out coating is: after the curing of one deck two-dimensional silhouette finished, the distance of a bed thickness of workbench decline adopted negative-pressure adsorption-type coating mechanism again, and being implemented in, the cured layer upper surface applies new liquid photosensitive resin.This method is owing to have certain interval between the scraper edge of a knife and the resin liquid level; Making the scraper cavity lose negative pressure owing to reasons such as difficult mobile depression that causes of resin viscous or the quick operation of scraper are as easy as rolling off a log when workpiece sinks influences the workpiece uniformity of the new liquid photosensitive resin coating of cured layer upper surface, finally influences workpiece quality and cause the product failure.When particularly making the bigger workpiece of area of section; Because the amount of resin in cured layer upper surface coating when amount of resin in the negative-pressure adsorption-type coating mechanism and device move is difficult to accurately control, making easily, the cured layer surface lacks resin or is difficult to guarantee that its bed thickness precision causes the coating procedure failure.Another kind is the immersion coating process.This method exists the workbench motion process consuming time more, and service working time is longer, causes the low deficiency that waits of make efficiency.
For solving above-mentioned deficiency, number be 2004100732595 at Chinese patent, be on April 6th, 2005 in open day that name is called " a kind of resin coating apparatus that is used for photocurable quick shaping process " and has designed the resinous coat of piston type workbench and make.This device comprise accumulator tank and be connected with accumulator tank pass through the peristaltic pump that computer is controlled; The shower nozzle that peristaltic pump is arranged through pipeline and branch is connected; Under the shower nozzle that branch is arranged, also be provided with cylinder body and close-fitting through computer-controlled piston with cylinder body; The space that the upper surface of piston and the inner cylinder face of cylinder body form is as the resin storage tank that holds resin, also is provided with scraper plate and the transducer that is connected with scraper plate in the upper end of piston in the position of same horizontal plane with the opening of cylinder body and by computer-controlled supersonic generator.In manufacturing process, after one deck resin solidification is accomplished, under the control of computer; The piston thick distance that sends behind; Peristaltic pump under the control of computer, from accumulator tank, extracts quantitative resin and in shower nozzle was sprayed onto resin storage tank, after the resin spray was good, the computer controlled ultrasonic generator was given scraper plate through transducer with vibration transmission; The scraper plate along continuous straight runs is wipeed action off; Accomplish the even coating work of resin bed, after product all completed, the top that piston rises to cylinder body ejected making.
It is not enough below existing when carrying out coating: because of shower nozzle is fixed through the resin coating apparatus in this patent documentation; The distributed areas that must make the spray orifice on the shower nozzle with the sizableness of piston just can avoid resin local excessive accumulation, make resin to be wipeed off by scraper plate; Thereby cause bulky, the shower nozzle of shower nozzle can interfere product in cylinder, to take out, be not suitable for the making of the bigger product of cross section; The strickling action of scraper plate is after the resin filling of accomplishing whole resin storage tank, just to carry out, and the time that therefore resin exposes under light before strickling is longer, receives the influence of light medium ultraviolet light; Can produce curing and cause mobile variation; Be unfavorable for wipeing off the carrying out of operation, make scraper plate in vibration, wipe action off through design ultrasonic unit and energy converter in this patent documentation, for this reason to overcome the problem of Resin Flow difference; So not only make the complex structure of device; And scraper plate with the vibration state wipe action off, it is the poor flatness of resin surface that can there be ripple in the surface of resin bed, is unfavorable for the reduction of coating bed thickness; Can not recycle the unnecessary resin that does not solidify in the cylinder; Reservoir designs for opening, and the resin in it is exposed for a long time can to cause the decline of resin flow property outside, is unfavorable for the reduction of coating layer thickness; The process of shower nozzle blown resin is separately carried out with the strickling process of scraper plate, and production efficiency is low.
Summary of the invention
The objective of the invention is to overcome the above-mentioned deficiency of existing piston formula resin coating apparatus, provide a kind of and can accomplish the light-cured rapid prototype manufacturing that evenly entirely be coated with, that the resin utilization rate is high of large tracts of land pellicular resins coating economizes the bigger product of material ground manufacturing cross section with resin coating apparatus and fast and high quality fast prototype making process efficiently with simple structure.
Above technical problem solves through following technical proposal: resin coating apparatus is used in a kind of light-cured rapid prototype manufacturing; Comprise master cylinder, with the computer of the close-fitting piston type workbench of master cylinder inwall, accumulator tank, pump and control pump and piston type workbench; Form container cavity between the upper surface of piston type workbench and the inner surface of master cylinder; It is characterized in that; Also comprise portable spray equipment; Said portable spray equipment comprises the shower nozzle that is provided with spout, scraper and through said computer-controlled driving shower nozzle and the synchronization-moving driving mechanism of scraper, said shower nozzle and scraper are positioned at the top of piston type workbench, and said pump is used for the resin in the accumulator tank in said shower nozzle is sprayed onto said container cavity.Through being can be mobile above the piston type workbench under the version that moves above the piston type workbench and shower nozzle and the driving of scraper plate with sprinkler design in same Drive Structure; Make shower nozzle scraper when the ejection resin is filled into container cavity can be immediately the upper surface of resin be wipeed off, thereby having avoided resin bed to expose for a long time influenced by ultraviolet ray produce the problem of the flowability decline of solidifying and causing; Because of shower nozzle for movably; Therefore need the distributed areas of the spray orifice on the shower nozzle be designed to be complementary with the size of piston type workbench; And need be to distribute along the length direction of shower nozzle perpendicular to the strip structure of moving direction and spray orifice get final product only with sprinkler design, play the volume that reduces shower nozzle effect, improved the compactedness of structure, in the process of taking-up product; Through drive to make make shower nozzle move apart the piston type workbench directly over, avoid with the process interference of taking out product.
As preferably, the hole that to be some edges distribute perpendicular to the shower nozzle moving direction of the spout on the shower nozzle or along the slit of extending perpendicular to the shower nozzle moving direction.The resin local excessive that can further reduce in shower nozzle is sprayed onto container cavity is piled up, and is convenient to resin surface is wipeed off, can realize the making of thinner resin bed.
As preferably, said scraper has two, and two scrapers are distributed in the both sides of the spout on the shower nozzle along the moving direction of shower nozzle.This structural relation of shower nozzle and scraper makes shower nozzle no matter move the action and the scraper that can carry out blown resin towards that direction and can in time resin be wipeed off do not have the directionality restriction when making coating, the operating efficiency when further making coating.
As preferably, said shower nozzle is provided with import and dispensing chamber, and the inner of said import is positioned at below the middle part of dispensing chamber, and the port of export of spout is positioned on the lower surface of shower nozzle, and the entrance point of spout is positioned at the top of dispensing chamber.Resin in the use in the accumulator tank gets into dispensing chamber, flows to spout, left back being sprayed in the container cavity through dispensing chamber again through import.The resin that can prevent to get into shower nozzle is directly from the spout ejection over against import, and the high conformity of the flow velocity of resin during from each spout ejection prevents that the resin in the container cavity from producing local accumulation, improves spraying effect.
As preferably, said shower nozzle comprises two and half ones that are detachably connected, and said dispensing chamber and spout are arranged on the joint face of two and half ones.Convenient when making shower nozzle, cleaning shower nozzle inner space and spout.
As preferably; Said container cavity width dimensions everywhere equates; Said driving mechanism comprises along the width of container cavity and is connected across the CD-ROM drive motor that mount pad and drive installation seat between the master cylinder both sides move along the width perpendicular to container cavity that said shower nozzle and scraper are connected on the said mount pad.In the course of work, CD-ROM drive motor is reciprocating above container cavity through actuator drive installation seat, and mount pad drives shower nozzle and scraper plate moves together.Shower nozzle can be accomplished the spraying of a resin bed and wipe action off from one of container cavity moves by side to the process of opposite side, when opposite side is moved back into a side, can accomplish down the spraying of one deck resin bed more again and wipe action off, the efficient height when filling out resin bed.Because does not wipe off through segmentation on the surface of resin bed, therefore can not produce the seam vestige, the surface smoothness of resin bed is good.
The present invention also comprises accumulator tank, and the upper end of said master cylinder is provided with overfall, and accumulator tank is connected with container cavity through said overfall, and said scraper is positioned on the same horizontal plane with said overfall.Liquid level was concordant with overfall when amount of resin that coating sprayed of every making was filled in the container cavity for just making resin.After product is accomplished; Shower nozzle and scraper plate move to avoid master cylinder directly over; The piston type workbench rises to than overfall is slightly high product is ejected; Make the resin not have to solidify under the gravity effect in overfall flows to accumulator tank, the interior resin of accumulator tank is recovered in the accumulator tank to be recycled.The utilization rate of resin is high, can reduce production costs.
As preferably, said accumulator tank is the cannelure on the master cylinder outer surface that is arranged on along the circumferential extension of master cylinder.If master cylinder is during because of unexpected overfilling, resin can be recovered that groove catches, can not produce that resin is scrapped, contaminated equipment and place, the good and compact conformation of the security during use.
As preferably, said pump is a compression pump, and said accumulator tank is a seal groove, and said pump is arranged between accumulator tank and the accumulator tank.Accumulator tank is designed to seal groove, and resin is moisture-sensitive and curing not, can keep good mobility for a long time, is convenient to paving of resin.Pump is designed to the compression pump accumulator tank of fitted seal again, and a pump can be accomplished simultaneously the resin transfer in the accumulator tank is recovered to the effect in the accumulator tank in container cavity and with the resin in the accumulator tank.Compact conformation, number of components is few.
A kind of fast prototype making process; It is characterized in that; The first step, making first floor resin coating layer; The concrete manufacturing process of first floor resin coating layer is: driving mechanism makes shower nozzle and scraper plate move to the bed thickness distance that descends under the initial side, the control of piston type workbench at computer of container cavity under the control of computer; Driving mechanism makes shower nozzle and scraper plate the resin the accumulator tank quantitatively is transported in the container cavity through shower nozzle under the control of computer from the offside that initially moves by side to initial side, the pump of container cavity, and shower nozzle sprays in the process of resin scraper to be wipeed the resin in the container cavity off synchronously, and the resin in the container cavity is carried out photocuring; Second step, making be one deck resin coating layer down; The concrete manufacturing process of following one deck resin coating layer is: under the control of computer, the descend distance of a bed thickness of piston type workbench; Reverse mobile, the pump of moving direction when driving mechanism makes shower nozzle and scraper plate do with the making last layer under the control of computer quantitatively is transported in container cavity through shower nozzle the resin in the accumulator tank under the control of computer; Scraper is wipeed the resin in the container cavity off synchronously in the process of shower nozzle sprinkling resin, and the resin in the container cavity is carried out photocuring; Second step of repetition finishes until whole product manufacturing; The 3rd step, piston type workbench rise to concordant or be higher than overfall with overfall under the control of computer, not have the resin of curing in overfall flows to accumulator tank and by compression pump, to be recovered to the accumulator tank in the master cylinder.
The present invention has following advantage; With the mode of sprinkler design for moving synchronously with scraper plate; Make that filling coating can carry out with the action of wipeing the resin upper surface off simultaneously, the time that resin is exposed is short, and Resin Flow descends little; Can realize the precision strickling of coating, coating layer thickness can reach 0.015 millimeter; The taking-up that compact conformation is simple, shower nozzle can not interfered product, the height of the efficient when making coating are convenient to carry out the making of large tracts of land coating; Design accumulator tank and dependency structure can be easily to there not being fixing resin to reclaim; Pump is designed to a compression pump and accumulator tank is designed to seal groove, can realize storing with the parts of letter from accumulator tank, being transported in the container cavity and the resin that does not have curing in the master cylinder being reclaimed all in the accumulator tank.
Description of drawings
Fig. 1 is the perspective view of the embodiment of the invention one.
Fig. 2 is the cross sectional representation of the shower nozzle among Fig. 1.
Fig. 3 is the schematic top plan view of the embodiment of the invention two.
Fig. 4 is the elevational schematic view of the shower nozzle of embodiment two.
Among the figure: master cylinder 1, piston type workbench 2, accumulator tank 3, pump 4, computer 5, portable spray equipment 6; Shower nozzle 61, left side one side of something 611, right-hand part 612, import 613, dispensing chamber 614; Spout 615, scraper 62, driving mechanism 63, mount pad 631, CD-ROM drive motor 632; Slide rail 633, chain 634, container cavity 7, accumulator tank 8, overfall 9.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further described.
Embodiment one, and referring to Fig. 1, resin coating apparatus is used in a kind of light-cured rapid prototype manufacturing, comprise master cylinder 1, with the close-fitting piston type workbench of master cylinder 1 inwall 2, accumulator tank 3, pump 4, computer 5 and portable spray equipment 6.
Accumulator tank 3 is a seal groove.Pump 4 is a compression pump.The entrance point of pump 4 is connected with accumulator tank 8 through pipeline.The outlet of pump 4 connects with accumulator tank 3 through pipeline.
CD-ROM drive motor 632 slides on slide rail 633 through two chain 634 drive installation seats 631.Article two, chain 634 is positioned on the two ends of mount pad 631.This kind type of drive makes that the stationarity when mount pad moves is good and can not produce deflection.
Piston type workbench 2, pump 4 and CD-ROM drive motor 632 are all controlled through computer 5.
Referring to Fig. 2, shower nozzle 61 is made up of two and half ones that are detachably connected promptly left half of 611 and right-hand part 612.Shower nozzle 61 is provided with import 613, dispensing chamber 614 and spout 615.Dispensing chamber 614 is arranged on the joint face of a left side half of 611 and right-hand part 612 with spout 615.Spout 615 is for along fore-and-aft direction being the reverse slit of extending of length of shower nozzle 61.The inner of import 613 is positioned at below the middle part of dispensing chamber 614.The port of export of spout 615 is positioned on the lower surface of shower nozzle 61, and the entrance point of spout 615 is positioned at the top of dispensing chamber 614.In the use, resin gets into shower nozzle through import.
Scraper 62 has two, and two scrapers 62 are integral mechanism with a left side half of 611 with right-hand part 612 respectively.Two scrapers 62 are distributed in the left and right sides of spout 615 along left and right directions.
Referring to Fig. 1 and Fig. 2; The method of using resin coating apparatus to carry out the rapid prototyping manufacturing through the manufacturing of this light-cured rapid prototype is: the first step, making first floor resin coating layer; The concrete manufacturing process of first floor resin coating layer is: driving mechanism 63 is designed to certainly move to that the right side is good, piston type workbench 2 descends a bed thickness distance under the control of computer 5 in the left side that makes shower nozzle 61 and scraper plate 62 move to container cavity 7 under the control of computer 5; Driving mechanism 63 makes shower nozzle 61 and scraper plate 62 move right side, pump 4 from the left side of container cavity and under the control of computer 5, the resin the accumulator tank 3 quantitatively is transported in the container cavity 7 through shower nozzle 61; Scraper 62 is wipeed the resins in the container cavity 7 off synchronously in the process of shower nozzle 61 sprinkling resins; Then the resin in the container cavity 7 is carried out photocuring; Photocuring mechanism does not draw for existing mechanism in the drawings; Second step, making be one deck resin coating layer down; The concrete manufacturing process of following one deck resin coating layer is: under the control of computer 5, the descend distance of a bed thickness of piston type workbench 2; Shower nozzle 61 and scraper plate 62 move driving mechanism 63 from right to left, pump 4 quantitatively is transported to the resin in the accumulator tank 3 in the container cavity 7 through shower nozzle 61 under the control of computer 5 making under the control of computer 5; Scraper 62 is wipeed the resin in the container cavity off synchronously in the process of shower nozzle 61 sprinkling resins, then the resins in the container cavity 7 is carried out photocuring; The manufacturing process that repeats down one deck resin coating layer finishes until whole product manufacturing; The 3rd step, piston type workbench 2 rise to overfall 9 concordant under the control of computer 5, and the resin that does not have in the master cylinder 1 to solidify is recovered to the accumulator tank 3 in overfall 9 flows to accumulator tank 8 and by pump 4.In the process of making adjacent resin coating layer; The moving direction of shower nozzle and scraper plate is opposite; In the entire work process of making product, shower nozzle and scraper plate are that one way of reciprocating and every work moves last resin and the resin strickling action of promptly accomplishing one deck coating.
Embodiment two, referring to Fig. 3, with the difference of embodiment one do, master cylinder 1 is the fan annular.Master cylinder 1 is the fan annular with the container cavity 7 that piston type workbench 2 surrounded.Accumulator tank 8 is the fan cannelure on the outer surface that is arranged on master cylinder 1.Drive motors 632 drive installation seats 631 are made reciprocally swinging in the use, mount pad 631 drives shower nozzle 61 circumferentially moving along container cavity 7.
Referring to Fig. 4 and combine Fig. 3, spout 615 is some radially-arranged holes along container cavity.Spout 615 aperture areas increase to the end away from CD-ROM drive motor 632 from the end near CD-ROM drive motor 632 successively.Though make that the inner (near the end of CD-ROM drive motor) of shower nozzle 61 is different with the linear velocity of outer end, can make the resin of ejection can not produce the phenomenon of local accumulation equally.
Claims (10)
1. resin coating apparatus is used in a light-cured rapid prototype manufacturing; Comprise master cylinder, with the computer of the close-fitting piston type workbench of master cylinder inwall, accumulator tank, pump and control pump and piston type workbench; Form container cavity between the upper surface of piston type workbench and the inner surface of master cylinder; It is characterized in that, also comprise portable spray equipment, said portable spray equipment comprises the shower nozzle that is provided with spout, scraper and through said computer-controlled driving shower nozzle and the synchronization-moving driving mechanism of scraper; Said shower nozzle and scraper are positioned at the top of piston type workbench, and said pump is used for the resin in the accumulator tank in said shower nozzle is sprayed onto said container cavity.
2. resin coating apparatus is used in light-cured rapid prototype manufacturing according to claim 1, it is characterized in that, the spout on the shower nozzle is that some edges are perpendicular to the hole of shower nozzle moving direction distribution or along the slit of extending perpendicular to the shower nozzle moving direction.
3. resin coating apparatus is used in light-cured rapid prototype manufacturing according to claim 1 and 2, it is characterized in that, said scraper has two, and two scrapers are distributed in the both sides of the spout on the shower nozzle along the moving direction of shower nozzle.
4. resin coating apparatus is used in light-cured rapid prototype manufacturing according to claim 1 and 2; It is characterized in that; Said shower nozzle is provided with import and dispensing chamber; The inner of said import is positioned at below the middle part of dispensing chamber, and the port of export of spout is positioned on the lower surface of shower nozzle, and the entrance point of spout is positioned at the top of dispensing chamber.
5. resin coating apparatus is used in light-cured rapid prototype manufacturing according to claim 4, it is characterized in that, said shower nozzle comprises two and half ones that are detachably connected, and said dispensing chamber and spout are arranged on the joint face of two and half ones.
6. resin coating apparatus is used in light-cured rapid prototype manufacturing according to claim 1 and 2; It is characterized in that; Said container cavity width dimensions everywhere equates; Said driving mechanism comprises along the width of container cavity and is connected across the CD-ROM drive motor that mount pad and drive installation seat between the master cylinder both sides move along the width perpendicular to container cavity that said shower nozzle and scraper are connected on the said mount pad.
7. resin coating apparatus is used in light-cured rapid prototype manufacturing according to claim 1 and 2; It is characterized in that also comprise accumulator tank, the upper end of said master cylinder is provided with overfall; Accumulator tank is connected with container cavity through said overfall, and said scraper is positioned on the same horizontal plane with said overfall.
8. resin coating apparatus is used in light-cured rapid prototype manufacturing according to claim 8, it is characterized in that, said accumulator tank is the cannelure on the master cylinder outer surface that is arranged on along the circumferential extension of master cylinder.
9. resin coating apparatus is used in light-cured rapid prototype manufacturing according to claim 8, it is characterized in that, said pump is a compression pump, and said accumulator tank is a seal groove, and said pump is arranged between accumulator tank and the accumulator tank.
10. through carrying out the method that rapid prototyping is made with resin coating apparatus like each the light-cured rapid prototype manufacturing in the claim 1 to 9; It is characterized in that; The first step, making first floor resin coating layer; The concrete manufacturing process of first floor resin coating layer is: driving mechanism makes shower nozzle and scraper plate move to the bed thickness distance that descends under the initial side, the control of piston type workbench at computer of container cavity under the control of computer; Driving mechanism makes shower nozzle and scraper plate under the control of computer, quantitatively be transported in container cavity through shower nozzle the resin the accumulator tank from the offside that initially moves by side to initial side, the pump of container cavity; Scraper is wipeed the resin in the container cavity off synchronously in the process of shower nozzle sprinkling resin, and the resin in the container cavity is carried out photocuring; Second step, making be one deck resin coating layer down; The concrete manufacturing process of following one deck resin coating layer is: under the control of computer, the descend distance of a bed thickness of piston type workbench; Reverse mobile, the pump of moving direction when driving mechanism makes shower nozzle and scraper plate do with the making last layer under the control of computer quantitatively is transported in container cavity through shower nozzle the resin in the accumulator tank under the control of computer; Scraper is wipeed the resin in the container cavity off synchronously in the process of shower nozzle sprinkling resin, and the resin in the container cavity is carried out photocuring; The manufacturing process that repeats down one deck resin coating layer finishes until whole product manufacturing; The 3rd step, piston type workbench rise to concordant or be higher than overfall with overfall under the control of computer, not have the resin of curing in overfall flows to accumulator tank and by compression pump, to be recovered to the accumulator tank in the master cylinder.
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Effective date of registration: 20200408 Address after: 311258 No. 1398 Xiangbin Road, Wenyan Street, Xiaoshan District, Hangzhou City, Zhejiang Province Patentee after: HANGZHOU SHINING 3D PRINTING TECHNOLOGY Co.,Ltd. Address before: 310018, No. 18, No. 1, 16 Avenue, Xiasha Hangzhou economic and Technological Development Zone, Zhejiang City, Hangzhou Province, 1-2 floors Patentee before: HANGZHOU SHINING RAPID PROTOTYPING TECHNOLOGY Co.,Ltd. |