CN208497685U - 3D printing head for material extrusion molding - Google Patents
3D printing head for material extrusion molding Download PDFInfo
- Publication number
- CN208497685U CN208497685U CN201820835644.6U CN201820835644U CN208497685U CN 208497685 U CN208497685 U CN 208497685U CN 201820835644 U CN201820835644 U CN 201820835644U CN 208497685 U CN208497685 U CN 208497685U
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- CN
- China
- Prior art keywords
- thimble
- cavity
- sealing
- limit
- limit plunger
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Abstract
The utility model discloses a kind of 3D printing heads for material extrusion molding, including wire feed cavity, thimble cavity, seal thimble, printing nozzle, heating module, limit plunger, reset spring, upper end cover and electromagnet, heating module is mounted on the bottom of thimble cavity, the bottom of heating module is printing nozzle, the wire feed cavity, thimble cavity, the internal channel of heating module, printing nozzle forms feeding passage, the top of thimble cavity is upper end cover, electromagnet is installed on upper end cover, the sealing thimble, limit plunger, reset spring is arranged in thimble cavity, under the action of electromagnet and reset spring, limit plunger is able to drive sealing thimble to up and down action；When electromagnet obtains electric, limit plunger band dynamic sealing thimble promotes lofty perch position, at this point, the bottom end of sealing thimble is detached from printing nozzle；When electromagnet power loss, limit plunger band dynamic sealing thimble drops to low spot position under the action of reset spring, at this point, the bottom end of sealing thimble blocks printing nozzle, prevents discharging.
Description
Technical field
The utility model belongs to 3D printing technique field, and in particular to a kind of 3D printing head for material extrusion molding.
Background technique
3D printing technique refers to print head under program, carries out material filling system according to the cross section information of current layer
It makes, then quickly produces required part by adding up layer by layer again, since it can manufacture arbitrarily complicated part and possess preferably
Printing freedom degree, in industrial production and daily life increasingly have practical application value.The 3D of extrudable moulding material
An important branch as 3D printing field is printed, can increasingly be made by the attention of domestic and foreign scholars because it has at present
Standby material ranges are wide, the material characteristics of the recyclable energy saving remanufactured of some materials, part lightweight high intensity, and extensive
Applied to including the multiple fields such as aerospace, defense military, medical industry, industry spot and robot, service trade.Currently,
In order to improve the 3D printing of extrudable moulding material, various performance improvements are carried out with regard to printing head itself both at home and abroad, have been removed
Continuous excavation and update for new material, even more pass through composite material using a variety of strengthening materials such as staple fiber, continuous fiber
3D printing realize that the promotion of the intensity fluency Forming Quality of printout in all directions is so far beaten by planning path
Every mechanical index has great promotion in the every single layer of material after print.
But existing 3D printer spray head is easy to appear fracture of wire in printing shaping process and the phenomenon that spray head blocks, fastly
The molding efficiency of speed is lower and printing effect is undesirable, and 3D printing spray head itself carries out Multilayer stacking type to forming surface, due to
Sealing performance reason is easy to produce wire drawing blocking spray head when cooling problem and spray head operate intermittently, and 3D printer is caused to generate event
Barrier, seriously affects the precision and surfacing degree of product.
Utility model content
The purpose of the utility model is to overcome the deficiencies in the prior art, a kind of 3D for material extrusion molding is provided and is beaten
Head is printed, feeding can be blocked in time when printing interruption, effectively improves the printing smoothness performance of printout, optimization molding matter
Amount.
The utility model is achieved through the following technical solutions:
A kind of 3D printing head for material extrusion molding, including wire feed cavity, thimble cavity, sealing thimble, printing spray
Mouth, heating module, limit plunger, reset spring, upper end cover and electromagnet,
The wire feed cavity is connected with thimble cavity, and the heating module is mounted on the bottom of thimble cavity, heated mould
Block has feeding internal channel, and the printing nozzle, the wire feed cavity, thimble cavity, heated mould is arranged in the bottom of heating module
Internal channel, the printing nozzle of block form feeding passage；
The upper end cover is installed at the top of thimble cavity, the electromagnet is installed on upper end cover, the sealing thimble,
Limit plunger, reset spring are arranged in thimble cavity, wherein sealing thimble and thimble cavity are coaxially arranged, seal thimble
Top is fixedly connected with limit plunger, and the extension diameter section for installing limit plunger is provided in the upper inside wall of thimble cavity, described
Limit plunger is slidably mounted in the extension diameter section, and limit plunger can move up and down along extension diameter section, and is carried out by ora terminalis under extension diameter section
Limit, the reset spring is mounted between limit plunger and upper end cover, for providing downward restoring force for limit plunger, in electromagnetism
Under the action of iron and reset spring, limit plunger is able to drive sealing thimble to up and down action；When electromagnet obtains electric, in the work of magnetic force
Lofty perch position is promoted with lower limit plug band dynamic sealing thimble, at this point, the bottom end of sealing thimble is detached from printing nozzle, printing nozzle energy
Enough normal material sprays；When electromagnet power loss, limit plunger fast speed belt dynamic sealing thimble drops to low spot position under the action of reset spring,
At this point, the bottom end of sealing thimble blocks printing nozzle, discharging is prevented.
In the above-mentioned technical solutions, through-hole corresponding with wire feed cavity outlet is provided on the side wall of thimble cavity.
In the above-mentioned technical solutions, the heating module is made of tube body and resistance heater, and tube body is inlaid in thimble chamber
Body bottom nozzle, resistance heater are fixedly mounted with tube body, the heat transfer that resistance heater generates to tube body, and tube body carries out material silk pre-
Heat, material silk melt in resistance heater, and material is sprayed from printing nozzle after finally melting.
In the above-mentioned technical solutions, the limit plunger includes stick harness and limit plug ring, and stick harness is coaxially inlaid in limit plug ring
Interior, limit plug ring is slidably mounted on the extension diameter section of thimble cavity.The stick harness and limit plug ring of the limit plunger are magnetic metal
Material.
In the above-mentioned technical solutions, be provided with sealing rubber ring between limit plug ring and stick harness, guarantee limit plug ring and
Leakproofness between stick harness.
In the above-mentioned technical solutions, thimble chamber outer wall is provided with heat-dissipating casing, to improve its thermal diffusivity.
In the above-mentioned technical solutions, the tapping channel of printing nozzle successively includes the first aperture section, the second hole from top to bottom
Diameter section and third aperture section, the diameter of the first aperture section are greater than the diameter of sealing thimble, the diameter of the second aperture section
Greater than the diameter of the first aperture section, the diameter of the third aperture section is equal to the diameter of sealing thimble；It is pressed through under thimble when sealing
Cheng Zhong, the material of molten condition can receive extruding and fill up the second aperture section in nozzle, and a part of material can be along the first aperture section
It flows up, to reduce material by the extrusion output of sealing thimble, prevents from forming spilling wire drawing；Third aperture section and sealing thimble
Form sealing.
In the above-mentioned technical solutions, the bottom end for sealing thimble is equipped with one section of hollow lumen, further by the hollow lumen
Play the role of preventing material from overflowing: when sealing thimble pushing, the fused materials in nozzle can enter sealing thimble bottom end
In hollow lumen, so that material be effectively prevent to be squeezed out by sealing thimble.After sealing thimble above mentions, seal in thimble hollow lumen
Material be again heated to molten condition, dripped from hollow lumen.
It the advantages of the utility model and has the beneficial effect that
1, sealing thimble is increased, using the up and down action of magnet control sealing thimble, realizes sealing thimble to nozzle
Timely blocking, prevent from forming wire drawing.
2, the tapping channel of printing nozzle successively includes the first aperture section, the second aperture section and third aperture from top to bottom
Section, the diameter of the first aperture section are greater than the diameter of sealing thimble, and the diameter of the second aperture section is greater than the first aperture section
Diameter, the diameter of third aperture section is equal to the diameter of sealing thimble；During sealing thimble pushes, melting in nozzle
The material of state can receive extruding and fill up the second aperture section, and a part of material can be flowed up along the first aperture section, to subtract
Few material is prevented from forming spilling wire drawing by the extrusion output of sealing thimble；Third aperture section is formed with sealing thimble and is sealed.
3, the bottom end for sealing thimble is equipped with one section of hollow lumen, and being further functioned as by the hollow lumen prevents material from overflowing
Effect: when sealing thimble and pushing, the fused materials in nozzle can enter in the hollow lumen of sealing thimble bottom end, to have
Effect prevents material from being squeezed out by sealing thimble.After sealing thimble above mentions, the material sealed in thimble hollow lumen is heated again
To molten condition, dripped from hollow lumen.
To sum up, the utility model can be very good to block in time using the sealing thimble of magnet control when printing interruption
Feeding, and by printing nozzle and seal thimble overflow prevention structure design, effectively improve printout printing smoothness performance,
Optimize Forming Quality.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model 3D printing head.
Fig. 2 is the partial enlargement diagram of the nozzle of the utility model 3D printing head.
Wherein:
1: wire feed cavity, 2: thimble cavity, 3: sealing thimble, 4: printing nozzle, 5: heating module, 6: limit plunger, 7: multiple
Position spring, 8: upper end cover, 9: electromagnet, 10: heat-dissipating casing, 3-1: hollow lumen, the 4-1: the first aperture section, the 4-2: the second aperture
Section, 4-3: third aperture section, 5-1: tube body, 5-2: resistance heater, 6-1: stick harness, 6-2: limit plug ring.
It for those of ordinary skill in the art, without creative efforts, can be according to above attached
Figure obtains other relevant drawings.
Specific embodiment
In order to make those skilled in the art better understand the scheme of the utility model, combined with specific embodiments below into one
Step illustrates the technical solution of the utility model.
Embodiment one
Referring to attached drawing 1, a kind of 3D printing head for material extrusion molding, including wire feed cavity 1, thimble cavity 2, sealing
Thimble 3, printing nozzle 4, heating module 5, limit plunger 6, reset spring 7, upper end cover 8 and electromagnet 9.
Thimble cavity 2 is vertically arranged, and the side of thimble cavity 2, and wire feed cavity 1 and top is arranged in the wire feed cavity 1
Needle cavity body 2 is connected and (is provided with through-hole corresponding with wire feed cavity outlet on the side wall of thimble cavity), the heating module 5
It is mounted on the bottom of thimble cavity 2, heating module has feeding internal channel, and the printing nozzle 4 is arranged in the bottom of heating module,
The wire feed cavity 1, thimble cavity 2, the internal channel of heating module 5, printing nozzle 4 form feeding passage.
The upper end cover 8 is installed at the top of thimble cavity 2, the electromagnet 9, the sealing are installed on upper end cover 8
Thimble 3, limit plunger 6, reset spring 7 are arranged in thimble cavity 2, wherein and sealing thimble 3 and thimble cavity are coaxially arranged,
The top of sealing thimble 3 is fixedly connected with limit plunger 6, is provided in the upper inside wall of thimble cavity for installing limit plunger
Extension diameter section, the limit plunger are slidably mounted in the extension diameter section, and limit plunger can move up and down along extension diameter section, and pass through extension diameter section
Lower ora terminalis is limited, and the reset spring is mounted between limit plunger and upper end cover, downward extensive for providing for limit plunger
Multiple power, under the action of electromagnet and reset spring, limit plunger is able to drive sealing thimble and moves up and down.When electromagnet obtains electric,
Limit plunger band dynamic sealing thimble promotes lofty perch position under the magnetic force, at this point, the bottom end of sealing thimble is detached from printing nozzle,
Printing nozzle being capable of normal material spray；When electromagnet power loss, under the action of reset spring under limit plunger fast speed belt dynamic sealing thimble
It is down to low spot position, at this point, the bottom end of sealing thimble blocks printing nozzle, prevents discharging.
Further, the heating module 5 is made of tube body 5-1 and resistance heater 5-2, and tube body is inlaid in thimble cavity
Bottom nozzle, resistance heater are fixedly mounted with tube body, the heat transfer that resistance heater generates to tube body, and tube body carries out material silk pre-
Heat, material silk melt in resistance heater, and material is sprayed from printing nozzle after finally melting.
Further, the limit plunger 6 includes stick harness 6-1 and limit plug ring 6-2, and the stick harness is coaxially inlaid in limit plunger
In ring, limit plug ring is slidably mounted on the extension diameter section of thimble cavity, is provided with sealing rubber ring between limit plug ring and stick harness,
Guarantee the leakproofness between limit plug ring and stick harness.The stick harness and limit plug ring of the limit plunger are magnetic metal material.
Further, thimble chamber outer wall is provided with heat-dissipating casing 10, to improve its thermal diffusivity.
Embodiment two
Referring to attached drawing 2, further, the tapping channel of printing nozzle 4 from top to bottom successively include the first aperture section 4-1,
Second aperture section 4-2 and third aperture section 4-3, the diameter of first aperture section are greater than the diameter of sealing thimble, and described second
The diameter of aperture section is greater than the diameter of the first aperture section, and the diameter of the third aperture section is equal to the diameter of sealing thimble；When close
During the needle that binds pushes, the material of molten condition can receive extruding and fill up the second aperture section, and a part of material meeting in nozzle
Along the first aperture, section flows up (diameter of the first aperture section is greater than the diameter of sealing thimble), is pushed up to reduce material by sealing
The extrusion output of needle prevents from forming spilling wire drawing；Finally, third aperture section is formed with sealing thimble and is sealed.
Embodiment three
Further, the bottom end for sealing thimble 3 is equipped with one section of hollow lumen 3-1, is further functioned as by the hollow lumen
The effect for preventing material from overflowing: when sealing the pushing of thimble 3, the fused materials in nozzle can enter the sky of sealing 3 bottom end of thimble
In chambers, so that material be effectively prevent to be squeezed out by sealing thimble 3.After sealing thimble 3 above mentions, 3 hollow lumen of thimble is sealed
In material be again heated to molten condition, dripped from hollow lumen.
Illustrative description has been done to the utility model above, it should explanation, in the core for not departing from the utility model
In the case where the heart, it is any it is simple deformation, modification or other skilled in the art can not spend creative work etc.
The protection scope of the utility model is each fallen with replacement.
Claims (10)
1. a kind of 3D printing head for material extrusion molding, it is characterised in that: including wire feed cavity, thimble cavity, sealing top
Needle, printing nozzle, heating module, limit plunger, reset spring, upper end cover and electromagnet,
The wire feed cavity is connected with thimble cavity, and the heating module is mounted on the bottom of thimble cavity, heating module tool
There is a feeding internal channel, the bottom of heating module is arranged the printing nozzle, the wire feed cavity, thimble cavity, heating module
Internal channel, printing nozzle form feeding passage；
The upper end cover is installed at the top of thimble cavity, the electromagnet, the sealing thimble, limit are installed on upper end cover
Plug, reset spring are arranged in thimble cavity, wherein sealing thimble and thimble cavity are coaxially arranged, seal the top of thimble
It is fixedly connected with limit plunger, the extension diameter section for installing limit plunger, the limit is provided in the upper inside wall of thimble cavity
Plug is slidably mounted in the extension diameter section, and limit plunger can move up and down along extension diameter section, and be limited by ora terminalis under extension diameter section,
The reset spring is mounted between limit plunger and upper end cover, for providing downward restoring force for limit plunger, in electromagnet and
Under the action of reset spring, limit plunger is able to drive sealing thimble to up and down action；When electromagnet obtains electric, in the effect of magnetic force
Under, limit plunger band dynamic sealing thimble promotes lofty perch position, at this point, the bottom end of sealing thimble is detached from printing nozzle；Electromagnet power loss
When, under the action of reset spring, limit plunger fast speed belt dynamic sealing thimble drops to low spot position, at this point, the bottom end of sealing thimble
Block printing nozzle.
2. a kind of 3D printing head for material extrusion molding according to claim 1, it is characterised in that: thimble cavity
Through-hole corresponding with wire feed cavity outlet is provided on side wall.
3. a kind of 3D printing head for material extrusion molding according to claim 1, it is characterised in that: the heated mould
Block is made of tube body and resistance heater, and tube body is inlaid in thimble cavity bottom nozzle, and resistance heater is fixedly mounted with tube body.
4. a kind of 3D printing head for material extrusion molding according to claim 1, it is characterised in that: the limit plunger
Including stick harness and limit plug ring, stick harness is coaxially inlaid in limit plug ring, and limit plug ring is slidably mounted on the expanding of thimble cavity
Section.
5. a kind of 3D printing head for material extrusion molding according to claim 4, it is characterised in that: in limit plug ring
Sealing rubber ring is provided between stick harness.
6. a kind of 3D printing head for material extrusion molding according to claim 4, it is characterised in that: the limit plunger
Stick harness be magnetic metal material production stick harness.
7. a kind of 3D printing head for material extrusion molding according to claim 4, it is characterised in that: the limit plunger
Stick harness and limit plug ring be magnetic metal material.
8. a kind of 3D printing head for material extrusion molding according to claim 1, it is characterised in that: in thimble cavity
Outer wall is provided with heat-dissipating casing.
9. a kind of 3D printing head for material extrusion molding according to claim 1, it is characterised in that: printing nozzle
Tapping channel successively includes the first aperture section, the second aperture section and third aperture section from top to bottom, first aperture section it is straight
Diameter is greater than the diameter of sealing thimble, and the diameter of the second aperture section is greater than the diameter of the first aperture section, the third aperture section
Diameter be equal to sealing thimble diameter；During sealing thimble pushes, the material of molten condition can receive extruding and fill out in nozzle
Full second aperture section, and a part of material can be flowed up along the first aperture section, to reduce material squeezing by sealing thimble
Output prevents from forming spilling wire drawing；Third aperture section is formed with sealing thimble and is sealed.
10. a kind of 3D printing head for material extrusion molding according to claim 1, it is characterised in that: sealing thimble
Bottom end be equipped with one section of hollow lumen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820835644.6U CN208497685U (en) | 2018-05-31 | 2018-05-31 | 3D printing head for material extrusion molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820835644.6U CN208497685U (en) | 2018-05-31 | 2018-05-31 | 3D printing head for material extrusion molding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208497685U true CN208497685U (en) | 2019-02-15 |
Family
ID=65287519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820835644.6U Expired - Fee Related CN208497685U (en) | 2018-05-31 | 2018-05-31 | 3D printing head for material extrusion molding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208497685U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108582784A (en) * | 2018-05-31 | 2018-09-28 | 天津职业技术师范大学 | A kind of 3D printing head for material extrusion molding |
| CN110614767A (en) * | 2019-08-16 | 2019-12-27 | 华南理工大学 | Solid-liquid material combined type double-nozzle 3D printer and printing method thereof |
-
2018
- 2018-05-31 CN CN201820835644.6U patent/CN208497685U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108582784A (en) * | 2018-05-31 | 2018-09-28 | 天津职业技术师范大学 | A kind of 3D printing head for material extrusion molding |
| CN110614767A (en) * | 2019-08-16 | 2019-12-27 | 华南理工大学 | Solid-liquid material combined type double-nozzle 3D printer and printing method thereof |
| CN110614767B (en) * | 2019-08-16 | 2024-02-20 | 华南理工大学 | Solid-liquid material combined type double-nozzle 3D printer and printing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190215 Termination date: 20190531 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |