CN204317412U - A kind of 3D printer head of chocolate material - Google Patents
A kind of 3D printer head of chocolate material Download PDFInfo
- Publication number
- CN204317412U CN204317412U CN201420769941.7U CN201420769941U CN204317412U CN 204317412 U CN204317412 U CN 204317412U CN 201420769941 U CN201420769941 U CN 201420769941U CN 204317412 U CN204317412 U CN 204317412U
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- housing
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- zui
- shower nozzle
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Abstract
The utility model discloses a kind of 3D printer head of chocolate material, comprise stationary housing, material extrusion device, calandria and cooling body; Material extrusion device comprises penetration type stepper motor and screw rod, containers, container plunger and extrudes shower nozzle; Screw rod stretches into containers and is connected with container plunger; Calandria comprises container heating member and shower nozzle heating member; Cooling body is blast type cooler, for print platform provides cold wind; Extrude that shower nozzle comprises heated aluminum block that equal hollow arranges, metallic nozzle and container are connected Ka Zui, be respectively arranged with for extruded material circulation, keep axis through aluminium block sends passage, nozzle sends passage and Ka Zui sends passage; Shower nozzle heating member comprises and all embeds electrothermal tube in heated aluminum block and thermistor one.Compact conformation, safe and reliable, solve shower nozzle easily stifled and material not easily freezing problem after extruding simultaneously, print smooth and easy, produce fast, yield rate is high, part is disassembled easily, and material splendid attire conveniently, is beneficial to later maintenance.
Description
Technical field
The utility model relates to a kind of 3D printer head, particularly relates to a kind of 3D printer head of chocolate material, is applied to chocolate 3D printer, belongs to food service industry printing device part.
Background technology
3D printing technique is accelerating to all trades and professions infiltration, and food service industry also wherein.Under the joint efforts of various circles of society, nowadays 3D prints food becomes possibility.
In chocolate 3D printer field, the implementation procedure of existing product is: poured in the containers of 3D printer by the chocolate slurries melted in advance, and design driving device be extruded into type complete 3D print.
But current chocolate 3D printer product does not fully take into account chocolate characteristic: chocolate is the special foods that a kind of easy thawing is also easily solidified, it or mixture simultaneously; Therefore chocolate do not possess fixing molten boiling point, and in the ordinary course of things, chocolate needs heating and melting, then cooling solidification.Thus the chocolate slurries melted causing splendid attire in containers good easily automatically cooling cause and solidify; Especially for extruder head, because its diameter is comparatively thin, easily there is cooling solidification in the chocolate slurries of molten condition, result in blockage extruder head herein, directly makes printing carry out.
In addition, chocolate slurries, from after extruder head is extruded, need to solidify at once, could continue to print to superpose another layer chocolate.But, existing chocolate 3D printer does not assemble Special cooling device, to such an extent as to the chocolate dropped on after extruding on print platform is still in partially molten state, therefore printer model can be made to cave on chocolate of the another layer of the chocolate laminated thereto of not solidified front layer, directly cause printing unsuccessfully.
So, for the 3D printer of chocolate material, design an excellent quality, the printer head of reliable in quality is vital for whole machine.
Utility model content
Main purpose of the present utility model is, overcomes deficiency of the prior art, provides a kind of 3D printer head of chocolate material of new structure, is specially adapted to chocolate food industry and prints.
Technical problem to be solved in the utility model is to provide that structure is simple, easy accessibility, safe and reliable, practical printing chocolate material 3D printer head, not only overcome the shower nozzle easily stifled defect that prior art exists, and realize chocolate material and easily solidify after the extrusion, thus make printing smooth and easy, produce fast, yield rate is high; Meanwhile, the component part of whole shower nozzle is disassembled easily, facilitates material splendid attire, and is conducive to the repair and replacement of later maintenance maintenance and parts, has the value in industry.
In order to achieve the above object, the technical scheme that the utility model adopts is:
A 3D printer head for chocolate material, comprises stationary housing, material extrusion device, calandria and cooling body.
Wherein, described material extrusion device to be vertically fit in stationary housing and to be obtained with extraneous fuselage by stationary housing and is connected, and comprises penetration type stepper motor and runs through screw rod, containers, the container plunger of motor and extrude shower nozzle; Described screw rod stretches into containers and is connected with the container plunger being arranged in containers.
Meanwhile, described calandria comprises for the container heating member of heating material container and the shower nozzle heating member for adding hot-extrudable shower nozzle; Described cooling body is blast type cooler, and it is connected with stationary housing, towards extruding print platform corresponding to shower nozzle discharging and providing cold wind for print platform.
And, described in extrude that shower nozzle comprises heated aluminum block that equal hollow arranges, metallic nozzle and container are connected Ka Zui; The end face of described heated aluminum block arranges container and is connected Ka Zui, and the bottom surface of heated aluminum block arranges metallic nozzle; Described heated aluminum block, metallic nozzle and container be connected Ka Zui be respectively arranged with for extruded material circulation, keep axis through aluminium block sends passage, nozzle sends passage and Ka Zui sends passage; Described container is connected the end face of Ka Zui and is connected with the bottom surface of containers, and the inner chamber that described Ka Zui sends passage and containers connects; Described shower nozzle heating member comprises and all embeds electrothermal tube in heated aluminum block and thermistor one.
The utility model is set to further: described Ka Zui sends passage and aluminium block and sends passage and be the smooth cylinder of wall; Described nozzle is sent passage and is comprised all smooth cylinder being positioned at the first half of wall, is positioned at the inverted cone of Lower Half and is positioned at the sharp extrusion of inverted cone cone, and described extrusion is circular.
The utility model is set to further: described heated aluminum block, metallic nozzle and container are connected Ka Zui by being welded; Described container linking Ka Zui is obtained with containers bottom surface internal thread by end face bidentate and is connected; It is octagonal hollow cylinder and hollow inverted cone that described metallic nozzle comprises external diameter successively.
The utility model is set to further: described stationary housing comprises housing one and housing two; Described housing one for only have three sides, cross section is U-shaped, hollow type side's body; Described housing two matches for size and housing one hollow reservoir cross section, center offers the flat board of through hole; Be disposed with horizontal draw-in groove and horizontal baffle from top to bottom in the hollow reservoir of described housing one, described horizontal draw-in groove is used for clamping housing two.
And described penetration type stepper motor is arranged on the end face of housing two, described containers is vertically connected to the bottom surface of horizontal baffle, the through hole that described screw rod penetrates housing two successively and be opened in horizontal baffle edges of boards shrinkage pool after stretch into containers.
The utility model is further set to: a side of described housing one is provided with the screw circular hole one put with longitudinal direction two arrangements that axis, side is symmetrical, obtains to be connected to realize side and fix for holding screw and extraneous fuselage; Or base, the relative two sides end face of described housing one is provided with the symmetrical screw circular hole two in axis, bottom surface, obtains to be connected for holding screw and extraneous fuselage and realize bottom surface and fix.
The utility model is further set to: described stationary housing also comprises the housing three of strip, and described housing three is installed in the vertical draw-in groove of horizontal baffle setting, for going along with sb. to guard him the containers being connected to horizontal baffle bottom surface.
The utility model is further set to: described housing three for cross section be square strip; The two ends of described housing three are installed in vertical draw-in groove.
The utility model is further set to: described horizontal draw-in groove comprises and is arranged on relative two sides inwall and two rectangular grooves isometric with side horizontal length and be arranged on another side inwall and be positioned at a billet groove of axis, side; Described rectangular groove and billet groove are in same level.
The utility model is further set to: described container heating member comprise around containers outer wall heating wire and be bundled in thermistor two in heating wire.
The utility model is further set to: described cooling body is two radiator fans on the base, relative two sides being connected to housing one by connector.
Compared with prior art, the beneficial effect that the utility model has is:
1, by the setting of calandria and cooling body, the dual-heated being embodied in container heating member and shower nozzle heating member is arranged, for extruded material circulation the aluminium block connected sends passage, nozzle sends passage and Ka Zui sends the through of passage and sends setting, and provide the special cooling layout of cold wind for print platform, solve the shower nozzle easily stifled and material problem of not easily solidifying after extruding simultaneously, thus make printing smooth and easy, produce fast, yield rate is high.
2, arranged by the blocking of stationary housing, be embodied in the setting of housing two, the most housing one of coated whole shower nozzle and the housing three for cladding container installing penetration type stepper motor, what facilitate whole shower nozzle component part disassembles assembling, and easy accessibility, use are flexibly; When needing to carry out required chocolate raw material in replacing containers, hold charging fast, meanwhile, be conducive to the repair and replacement of later maintenance maintenance, parts; There is the advantage such as compact conformation, compact.
Foregoing is only the general introduction of technical solutions of the utility model, and in order to clearer understanding technological means of the present utility model, below in conjunction with accompanying drawing, the utility model will be further described.
Accompanying drawing explanation
Fig. 1 is the perspective view of the utility model embodiment entirety;
Fig. 2 be the utility model embodiment entirety face structural representation;
Fig. 3 is the perspective view extruding shower nozzle in the utility model embodiment;
Fig. 4 is the stereochemical structure exploded view of stationary housing in the utility model embodiment;
Fig. 5 is the backsight cut-away view of the utility model embodiment middle shell one;
Fig. 6 be the utility model embodiment middle shell one look up cut-away view.
Detailed description of the invention
Below in conjunction with Figure of description, the utility model is further described.
As shown in Figure 1, Figure 2, shown in Fig. 3 and Fig. 4, a kind of 3D printer head of chocolate material, comprises stationary housing, material extrusion device, calandria and cooling body 1.
As depicted in figs. 1 and 2, described material extrusion device to be vertically fit in stationary housing and to be obtained with extraneous fuselage by stationary housing and is connected; Described material extrusion device comprises penetration type stepper motor 2 and runs through the screw rod 3 of motor 2, containers 4, container plunger and extrude shower nozzle 5; Described screw rod 3 stretches into containers 4 and is connected with the container plunger being arranged in containers 4; Described penetration type stepper motor 2 can select model to be penetration type 57 stepper motor of 57BYGH301A.
As shown in Figure 3, described in extrude that shower nozzle 5 comprises heated aluminum block 51 that equal hollow arranges, metallic nozzle 52 and container are connected card mouth 53, three makes integral type by welding; The end face of described heated aluminum block 51 arranges container and is connected card mouth 53, and the bottom surface of heated aluminum block 51 arranges metallic nozzle 52; Described heated aluminum block 51, metallic nozzle 52 and container be connected card mouth 53 be respectively arranged with for extruded material circulation, keep axis through aluminium block sends passage 510, nozzle sends passage and Ka Zui sends passage 530; The end face that described container is connected card mouth 53 is connected with the bottom surface of containers 3, and described Ka Zui sends passage 530 and connects with the inner chamber of containers 4.
Described Ka Zui sends passage 530 and aluminium block and sends passage 510 and be the smooth cylinder of wall; Described nozzle is sent passage and is comprised all smooth cylinder being positioned at the first half of wall, is positioned at the inverted cone of Lower Half and is positioned at the sharp extrusion 520 of inverted cone cone, and described extrusion 520 is circular.For extruded material circulation the aluminium block connected sends passage 510, nozzle sends passage and Ka Zui sends the through of passage 510 and sends setting, can effectively prevent chocolate slurries in metallic nozzle 52 place frozen plug.Described container linking card mouth 53 is obtained with containers 4 bottom surface internal thread by end face bidentate and is connected; It is octagonal hollow cylinder 521 and hollow inverted cone 522 that described metallic nozzle 52 comprises external diameter successively.
As shown in Figure 1 to Figure 3, described calandria comprises for the container heating member of heating material container 4 and the shower nozzle heating member for adding hot-extrudable shower nozzle 5; Described shower nozzle heating member comprises and all embeds electrothermal tube 511 in heated aluminum block 51 and thermistor 1; The diameter that described container heating member comprises around containers 4 outer wall is the heating wire 41 of 1.1mm and the thermistor 2 42 be bundled in heating wire 41.Described thermistor 1 is consistent with the electric parameter of thermistor 2 42.
Heating wire 41 evenly around containers 4 outer wall to the chocolate heat temperature raising in containers 4, make chocolate reach molten condition temperature; After reaching melt temperature, heating wire can provide uniform heat always, makes to keep steady temperature in containers, avoids cooling solidification, is conducive to extruding operation; Thermistor 2 42 can obtain the temperature of containers wall in real time, and feeds back to external control circuit.Electrothermal tube 511 embeds in heated aluminum block 51, and being heated by heated aluminum block 51 is passed temperature and to send chocolate slurries in passage 510 to aluminium block, can ensure that whole chocolate slurries send being heated evenly of passage; Thermistor one 512 can obtain metallic nozzle 52 temperature in real time, and feeds back to external control circuit, is convenient to monitor and regulate.
Described cooling body 1 is blast type cooler, and it is connected with stationary housing, towards extruding print platform (not shown) corresponding to shower nozzle 5 discharging and providing cold wind for print platform; Described cooling body 1 can select radiator fan.
As shown in Figure 4, described stationary housing comprises housing 1 and housing 27; Described housing 1 for only have three sides, cross section is U-shaped, hollow type side's body; Described housing 27 matches for size and housing 1 hollow reservoir cross section, center offers the flat board of through hole 71; Be disposed with horizontal draw-in groove 61 and horizontal baffle 62 from top to bottom in the hollow reservoir of described housing 1, described horizontal draw-in groove 61 is for clamping housing 27.
Described stationary housing also comprises the housing 38 of strip, and described housing 38 is installed in the vertical draw-in groove 621 of horizontal baffle 62 setting, for going along with sb. to guard him the containers 4 being connected to horizontal baffle 62 bottom surface; Described housing 38 for cross section be square strip; The two ends of described housing 38 are installed in vertical draw-in groove 621.In print procedure, containers 4 drives the phenomenon that may occur departing from displacement due to the spin friction of container plunger, can be reduced displacement by going along with sb. to guard him of housing 38, be ensured to be connected firmly.
Described horizontal draw-in groove 61 comprises and is arranged on relative two sides inwall and two rectangular grooves 611 isometric with side horizontal length and be arranged on another side inwall and be positioned at a billet groove 612 of axis, side; Described rectangular groove 611 and billet groove 612 are in same level.
As depicted in figs. 1 and 2, described penetration type stepper motor 2 is arranged on the end face of housing 27, described containers 4 is vertically connected to the bottom surface of horizontal baffle 62, the through hole 71 that described screw rod 3 penetrates housing 27 successively and be opened in horizontal baffle 62 edges of boards shrinkage pool 622 after stretch into containers 4.Described through hole 71 can by the screw face ledge of penetration type stepper motor 2 through being inserted in, thus make the surface of penetration type stepper motor 2 screw face and housing 27 reach flat contact, can ensure the good fixed effect of penetration type stepper motor 1.
As shown in Figure 5 and Figure 6, provide two kinds of different fixed forms stationary housing being connected to extraneous fuselage, be respectively fixing and bottom surface, side and fix.
As shown in Figure 5, be provided with the screw circular hole 1 put with longitudinal direction two arrangements that axis, side is symmetrical in a side of described housing 1, obtain to be connected for holding screw and extraneous fuselage and realize side and fix; Or, as shown in Figure 6, be provided with the symmetrical screw circular hole 2 64 in axis, bottom surface at base, the relative two sides end face of described housing 1, obtain to be connected for holding screw and extraneous fuselage and realize bottom surface and fix.
The described radiator fan as cooling body 1 is connected to two radiator fans on the base, relative two sides of housing 1 by connector 11, give as print platform provides cold wind from dual-side, and the chocolate rapid solidification of the molten condition enabling to fall on print platform or semi-molten state, do not affect and again extrude and the printing superposed.
Innovative point of the present utility model is, arranged by the dual-heated of container heating member and shower nozzle heating member, for extruded material circulation the aluminium block connected sends passage, nozzle sends passage and Ka Zui sends the through of passage and sends setting, and provide the special cooling layout of cold wind for print platform, solve the shower nozzle easily stifled and material problem of not easily solidifying after extruding simultaneously, thus make printing smooth and easy, produce fast, yield rate is high.
In addition, arranged by the blocking of stationary housing, be embodied in the setting of housing two, the most housing one of coated whole shower nozzle and the housing three for cladding container installing penetration type stepper motor, what facilitate whole shower nozzle component part disassembles assembling, and easy accessibility, use are flexibly.
And, the operating process needing to carry out changing required chocolate raw material in containers is easy is: first taken out from vertical draw-in groove by housing three, again by penetration type stepper motor, housing two, screw rod, containers with extrude shower nozzle and take off from housing one in the lump, then container plunger is taken out from containers, can replacing raw material be carried out, more finish changing laggard row inverse process and reinstall and namely complete.Whole replacement operation process is fast and convenient, and operation in order; Be conducive to the repair and replacement of later maintenance maintenance, parts especially.
The above, it is only preferred embodiment of the present utility model, not any pro forma restriction is done to the utility model, although the utility model discloses as above with preferred embodiment, but and be not used to limit the utility model, any those skilled in the art, do not departing within the scope of technical solutions of the utility model, make a little change when the technology contents of above-mentioned announcement can be utilized or be modified to the Equivalent embodiments of equivalent variations, in every case be the content not departing from technical solutions of the utility model, according to any simple modification that technical spirit of the present utility model is done above embodiment, equivalent variations and modification, all still belong in the scope of technical solutions of the utility model.
Claims (10)
1. a 3D printer head for chocolate material, is characterized in that:
Comprise stationary housing, material extrusion device, calandria and cooling body;
Described material extrusion device to be vertically fit in stationary housing and to be obtained with extraneous fuselage by stationary housing and is connected, and comprises penetration type stepper motor and runs through screw rod, containers, the container plunger of motor and extrude shower nozzle; Described screw rod stretches into containers and is connected with the container plunger being arranged in containers;
Described calandria comprises for the container heating member of heating material container and the shower nozzle heating member for adding hot-extrudable shower nozzle;
Described cooling body is blast type cooler, and it is connected with stationary housing, towards extruding print platform corresponding to shower nozzle discharging and providing cold wind for print platform;
Describedly extrude that shower nozzle comprises heated aluminum block that equal hollow arranges, metallic nozzle and container are connected Ka Zui; The end face of described heated aluminum block arranges container and is connected Ka Zui, and the bottom surface of heated aluminum block arranges metallic nozzle; Described heated aluminum block, metallic nozzle and container be connected Ka Zui be respectively arranged with for extruded material circulation, keep axis through aluminium block sends passage, nozzle sends passage and Ka Zui sends passage; Described container is connected the end face of Ka Zui and is connected with the bottom surface of containers, and the inner chamber that described Ka Zui sends passage and containers connects;
Described shower nozzle heating member comprises and all embeds electrothermal tube in heated aluminum block and thermistor one.
2. the 3D printer head of a kind of chocolate material according to claim 1, is characterized in that:
Described Ka Zui sends passage and aluminium block and sends passage and be the smooth cylinder of wall; Described nozzle is sent passage and is comprised all smooth cylinder being positioned at the first half of wall, is positioned at the inverted cone of Lower Half and is positioned at the sharp extrusion of inverted cone cone, and described extrusion is circular.
3. the 3D printer head of a kind of chocolate material according to claim 1, is characterized in that:
Described heated aluminum block, metallic nozzle and container are connected Ka Zui by being welded;
Described container linking Ka Zui is obtained with containers bottom surface internal thread by end face bidentate and is connected;
It is octagonal hollow cylinder and hollow inverted cone that described metallic nozzle comprises external diameter successively.
4. the 3D printer head of a kind of chocolate material according to claim 1, is characterized in that:
Described stationary housing comprises housing one and housing two; Described housing one for only have three sides, cross section is U-shaped, hollow type side's body; Described housing two matches for size and housing one hollow reservoir cross section, center offers the flat board of through hole; Be disposed with horizontal draw-in groove and horizontal baffle from top to bottom in the hollow reservoir of described housing one, described horizontal draw-in groove is used for clamping housing two;
Described penetration type stepper motor is arranged on the end face of housing two, and described containers is vertically connected to the bottom surface of horizontal baffle, the through hole that described screw rod penetrates housing two successively and be opened in horizontal baffle edges of boards shrinkage pool after stretch into containers.
5. the 3D printer head of a kind of chocolate material according to claim 4, is characterized in that:
One side of described housing one is provided with the screw circular hole one put with longitudinal direction two arrangements that axis, side is symmetrical, obtains to be connected to realize side and fix for holding screw and extraneous fuselage;
Or,
Base, the relative two sides end face of described housing one is provided with the symmetrical screw circular hole two in axis, bottom surface, obtains to be connected to realize bottom surface and fix for holding screw and extraneous fuselage.
6. the 3D printer head of a kind of chocolate material according to claim 4, is characterized in that:
Described stationary housing also comprises the housing three of strip, and described housing three is installed in the vertical draw-in groove of horizontal baffle setting, for going along with sb. to guard him the containers being connected to horizontal baffle bottom surface.
7. the 3D printer head of a kind of chocolate material according to claim 6, is characterized in that:
Described housing three for cross section be square strip;
The two ends of described housing three are installed in vertical draw-in groove.
8. the 3D printer head of a kind of chocolate material according to claim 4, is characterized in that:
Described horizontal draw-in groove comprises and is arranged on relative two sides inwall and two rectangular grooves isometric with side horizontal length and be arranged on another side inwall and be positioned at a billet groove of axis, side; Described rectangular groove and billet groove are in same level.
9. the 3D printer head of a kind of chocolate material according to claim 1, is characterized in that:
Described container heating member comprise around containers outer wall heating wire and be bundled in thermistor two in heating wire.
10. the 3D printer head of a kind of chocolate material according to claim 1, is characterized in that: described cooling body is two radiator fans on the base, relative two sides being connected to housing one by connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420769941.7U CN204317412U (en) | 2014-12-08 | 2014-12-08 | A kind of 3D printer head of chocolate material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420769941.7U CN204317412U (en) | 2014-12-08 | 2014-12-08 | A kind of 3D printer head of chocolate material |
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| Publication Number | Publication Date |
|---|---|
| CN204317412U true CN204317412U (en) | 2015-05-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420769941.7U Expired - Fee Related CN204317412U (en) | 2014-12-08 | 2014-12-08 | A kind of 3D printer head of chocolate material |
Country Status (1)
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| CN (1) | CN204317412U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104985818A (en) * | 2015-07-14 | 2015-10-21 | 成都思维智造科技有限公司 | Thermal-balance spray head for three-dimensional printer |
| CN105647802A (en) * | 2015-12-30 | 2016-06-08 | 四川蓝光英诺生物科技股份有限公司 | Biological printer |
| CN106070933A (en) * | 2016-08-08 | 2016-11-09 | 南京增材制造研究院发展有限公司 | A kind of Novel double-screw formula chocolate three-dimensional printer extrusion device |
| CN107214809A (en) * | 2017-08-10 | 2017-09-29 | 河海大学常州校区 | A kind of extrusion device of 3D printing clay |
| CN107521091A (en) * | 2017-10-24 | 2017-12-29 | 江苏天泽教育咨询有限公司 | A kind of extrusion structure of 3D printer |
| CN108327252A (en) * | 2018-04-11 | 2018-07-27 | 清华大学 | Screw extrusion system and 3D printer comprising the system |
-
2014
- 2014-12-08 CN CN201420769941.7U patent/CN204317412U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104985818A (en) * | 2015-07-14 | 2015-10-21 | 成都思维智造科技有限公司 | Thermal-balance spray head for three-dimensional printer |
| CN105647802A (en) * | 2015-12-30 | 2016-06-08 | 四川蓝光英诺生物科技股份有限公司 | Biological printer |
| CN106070933A (en) * | 2016-08-08 | 2016-11-09 | 南京增材制造研究院发展有限公司 | A kind of Novel double-screw formula chocolate three-dimensional printer extrusion device |
| CN107214809A (en) * | 2017-08-10 | 2017-09-29 | 河海大学常州校区 | A kind of extrusion device of 3D printing clay |
| CN107214809B (en) * | 2017-08-10 | 2019-09-10 | 河海大学常州校区 | A kind of extrusion device of 3D printing clay |
| CN107521091A (en) * | 2017-10-24 | 2017-12-29 | 江苏天泽教育咨询有限公司 | A kind of extrusion structure of 3D printer |
| CN108327252A (en) * | 2018-04-11 | 2018-07-27 | 清华大学 | Screw extrusion system and 3D printer comprising the system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150513 Termination date: 20181208 |